CN110744050A - Adhesive for metal powder injection molding and preparation method thereof - Google Patents
Adhesive for metal powder injection molding and preparation method thereof Download PDFInfo
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- CN110744050A CN110744050A CN201911107681.0A CN201911107681A CN110744050A CN 110744050 A CN110744050 A CN 110744050A CN 201911107681 A CN201911107681 A CN 201911107681A CN 110744050 A CN110744050 A CN 110744050A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
- B22F1/107—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material containing organic material comprising solvents, e.g. for slip casting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
- B22F1/103—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material containing an organic binding agent comprising a mixture of, or obtained by reaction of, two or more components other than a solvent or a lubricating agent
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/22—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces for producing castings from a slip
- B22F3/225—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces for producing castings from a slip by injection molding
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- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The invention relates to the technical field of metal powder injection molding, and discloses a bonding agent for metal powder injection molding, which comprises the following components in percentage by weight: 50-65 wt% of polyethylene glycol, 30-45 wt% of plasticizer, 4-6 wt% of stearic acid and 0.1-0.2 wt% of sodium o-sulfonylbenzoylimide. Also discloses a preparation method of the adhesive for metal powder injection molding, which can improve the mechanical property of injection molding parts.
Description
Technical Field
The invention relates to the technical field of metal powder injection molding, in particular to an adhesive for metal powder injection molding and a preparation method thereof.
Background
In recent years, the technology for preparing metal powder is leap forward, the near-net-shape forming technology rises rapidly, the metal powder injection molding technology (MIM for short) is also developed, and structural parts with high density, high precision and three-dimensional complex shapes are rapidly manufactured by the processes of powder making, mixing and granulating, injection molding of blanks by using a mold, degreasing, sintering, post-treatment and the like, the mass production can be realized, and the process technology not only has the advantages of less processes, no cutting or less cutting, high economic benefit and the like, but also overcomes the defects of uneven material quality, low mechanical property, difficulty in molding thin walls and complex structures of products in the traditional powder metallurgy process, and is particularly suitable for mass production of small, complex and special metal parts.
At present, however, only a few parts of different alloy parts prepared by a metal powder injection molding (MIM) technology are industrialized, and one important reason is that no good adhesive exists, and particularly, the adhesive used in the MIM technology for titanium and titanium alloys in the market is few in types and poor in effect.
For the adhesives, the most widely applied adhesives at present are thermoplastic wax-based adhesives and polymer adhesives, and aiming at the MIM process of alloy powder, the wax-based adhesives have low solvent degreasing rate, and the prepared parts have high carbon content and influence on the performance of the parts, so the development is limited. The polyformaldehyde diffusion rate in the polymer adhesive is higher, compared with other adhesives, the degreasing efficiency is higher, and products with larger thickness can be prepared, but the polyformaldehyde is decomposed in the injection process to generate formaldehyde with higher toxicity, and strong acid used in the catalytic degreasing process has larger corrosion effect on equipment, so the application of the polyacetal-based adhesive is limited. The water-soluble adhesive is an environment-friendly adhesive, but the mechanical properties of parts injection-molded using the water-soluble adhesive are not good.
Disclosure of Invention
In order to solve the problem of poor mechanical property of parts formed by injection molding of a water-soluble adhesive in the prior art, the adhesive for metal powder injection molding and the preparation method thereof are provided.
The invention provides a bonding agent for metal powder injection molding, which comprises the following components in percentage by weight: 50-65 wt% of polyethylene glycol, 30-45 wt% of plasticizer, 4-6 wt% of stearic acid and 0.1-0.2 wt% of sodium o-sulfonylbenzoylimide.
By adopting the technical scheme, because the adhesive for metal powder injection molding contains the o-sulfonylbenzoylimide sodium, when the adhesive is used for bonding metal powder injection molding, in the process that metal powder balls are heated and the distance between the metal powder balls is reduced, the-SO of the molecular structure of the o-sulfonylbenzoylimide sodium2The NH group can reduce the wetting angle of the metal powder ball to enable the metal powder ball to be easier to melt on one hand, and can improve the activity of the metal powder ball on the other hand; the two functions are combined, so that the internal stress in the part forming process can be reduced; on the basis, the good adhesive property of the sodium o-sulfonylbenzoylimide in combination with the polyethylene glycol and the lubricant of stearic acid can greatly improve the fusion effect among the metal powder, thereby improving the mechanical property of the part macroscopically and reducing the surface roughness of the part by improving the fusion effect among the metal powder.
Further, the adhesive for metal powder injection molding comprises the following components in percentage by weight: 0.5-1 wt% of silane coupling agent and 0.1-0.2 wt% of antioxidant.
By adopting the technical scheme, the silane coupling agent can effectively reduce the bonding tension between metal powder, has excellent leveling property and spreading property, can improve the wear resistance, scratch resistance and anti-sticking property of injection molding feed and has a brightening effect; after the silane coupling agent and the stearic acid are reasonably compounded, the fluidity during injection and mold filling can be improved, the mold filling performance during injection molding feeding injection molding formed by mixing the adhesive and the metal powder is greatly improved, and the preparation of components with complex sizes and structures is facilitated. The addition of the antioxidant avoids the increase of oxygen content in the mixing and granulating process of the adhesive and the metal powder, and can reduce and delay the oxidation phenomenon of the metal powder and the adhesive.
Further, the paint comprises the following components in percentage by weight: 60-65 wt% of polyethylene glycol, 30-35 wt% of plasticizer, 4-5 wt% of stearic acid, 0.1-0.2 wt% of sodium o-sulfonylbenzoylimide, 0.5-1 wt% of silane coupling agent and 0.1-0.2 wt% of antioxidant.
By adopting the preferable component distribution ratio scheme, the matching effect among the components is improved, and the filling property and the stability during injection molding can be further improved.
Further, the silane coupling agent is one or more of polyether modified dimethyl siloxane, methacryloxypropyl trimethoxy silane or vinyl triethoxy silane.
By adopting the technical scheme, the fluidity and the spreadability of the adhesive can be greatly improved by adding the specific silane coupling agent. Particularly, when the silane coupling agent adopts polyether modified dimethyl siloxane, the anti-blocking property can be greatly improved in a water-based system, the better fluidity and the spreading property are exerted, the shrinkage cavity is prevented, the filling property of the adhesive and the metal powder during injection molding is further improved, and the surface gloss of an injection molding member can be improved.
Further, the antioxidant is one or more of KL-1041 aqueous metal powder antioxidant, RY-P321 antioxidant or Q3270 antioxidant.
By adopting the technical scheme, the antioxidant performance of the adhesive can be greatly improved by adding the specific antioxidant of the type. In particular, the KL-1041 aqueous metal powder antioxidant with good water solubility is uniformly dispersed in an adhesive system, so that the protective property of the adhesive system can be fully exerted, the oxidation phenomenon of the adhesive can be delayed and weakened, the metal powder can be subjected to an oxidation resistance effect, and the adhesive is non-toxic.
Further, the plasticizer is polymethyl methacrylate and/or polypropylene, wherein when the plasticizer is polymethyl methacrylate and polypropylene, the weight ratio of the polymethyl methacrylate to the polypropylene is (3-5) to (3-5) based on the weight of the plasticizer.
By adopting the technical scheme, the polypropylene has good stability and low cost at normal temperature, and the polymethyl methacrylate has high molding strength and strong creep resistance; when the polypropylene and the polymethyl methacrylate are combined for use, the polypropylene and the polymethyl methacrylate interact after being reasonably compounded, on one hand, the polypropylene and the polymethyl methacrylate play a role in shape preservation during injection molding, and the stability of a blank body during injection molding is improved; on the other hand, the shrinkage rate of the injection molding blank can be reduced, the impact resistance and the strength of the injection molding member can be improved, the influence of residual moisture after de-oiling with deionized water on the shrinkage rate of the injection molding member can be improved, and the influence of environmental humidity on the injection molding member can be avoided.
Furthermore, the molecular weight of the polyethylene glycol is 500-5000, and the molecular weight of the polymethyl methacrylate is 100-200 ten thousand.
By adopting the technical scheme, the polyethylene glycol with the molecular weight of 500-5000 has certain hygroscopicity, and can prevent the deformation of a blank body during injection molding. After the polymethyl methacrylate with the molecular weight of 100-200 ten thousand and the polypropylene are compounded, the strength and the creep resistance are better.
The invention also provides a method for preparing the adhesive for metal powder injection molding, which comprises the following steps:
firstly, melting a certain amount of polyethylene glycol under a constant temperature condition;
step two, respectively adding a certain amount of plasticizer, stearic acid and sodium o-sulfonylbenzoylimide into the step one, uniformly stirring and standing for a certain time;
and step three, cooling to obtain the uniform and milky adhesive.
By adopting the technical scheme, the materials are respectively added and mixed, so that the uniformity of the adhesive is facilitated, and further the uniformity of the metal powder and the adhesive mixing granulation is facilitated. The adhesive prepared by the method has the advantages of good mold filling and stability during injection molding, low cost, easy degreasing, environmental friendliness and no pollution.
Further, in the second step, a certain amount of silane coupling agent and antioxidant are respectively added.
Further, in the first step, the temperature under constant temperature condition is 160-180 ℃; and in the second step, the standing time is 20-40 min.
By adopting the technical scheme, the polyethylene glycol can be rapidly and efficiently melted at the temperature of 160-180 ℃.
Compared with the prior art, the invention has the following beneficial effects:
1. because the components of the adhesive for metal powder injection molding contain sodium o-sulfonylbenzoylimide, when the adhesive is used for bonding metal powder injection molding, in the process that metal powder balls are heated and the distance between the metal powder balls is reduced, the-SO of the molecular structure of the sodium o-sulfonylbenzoylimide2The NH group can reduce the wetting angle of the metal powder ball to enable the metal powder ball to be easier to melt on one hand, and can improve the activity of the metal powder ball on the other hand; the two functions are combined, so that the internal stress in the part forming process is reduced; on the basis, the good adhesive property of the sodium o-sulfonylbenzoylimide in combination with the polyethylene glycol and the lubricant of stearic acid can greatly improve the fusion effect among the metal powder, thereby improving the mechanical property of the part macroscopically and reducing the surface roughness of the part by improving the fusion effect among the metal powder.
2. The stability of the blank body during injection molding is improved by reasonably compounding the polypropylene and the polymethyl methacrylate; through the reasonable compounding of stearic acid and a silane coupling agent, the filling property of injection molding is improved, the components with complex sizes and structures can be conveniently prepared, and parts with the thinnest wall thickness of 1mm can be injection molded.
3. The adhesive disclosed by the invention has the advantages of no expensive raw materials and low production cost; the degreasing agent is used as a water-soluble adhesive, so that the degreasing is simple and the efficiency is high; no harmful component, environment protection and no pollution.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The invention provides an embodiment, which relates to a binder for metal powder injection molding, comprising the following components in percentage by weight: 50-65 wt% of polyethylene glycol, 30-45 wt% of plasticizer, 4-6 wt% of stearic acid and 0.1-0.2 wt% of sodium o-sulfonylbenzoylimide.
Specifically, the polyethylene glycol with the molecular weight of 500-5000 and the polymethyl methacrylate with the molecular weight of 100-200 ten thousand are adopted.
The plasticizer may be selected from any one or more of the prior art, such as polymethylmethacrylate, polypropylene, low density polyethylene, polyvinylbutyral, and the like.
The chemical formula of the o-sulfonyl benzoyl imide sodium is C7H5NO3S, the purity is more than or equal to 99wt%, and the molecular weight is 183.18.
Stearic acid, otherwise known as octadecanoic acid, of formula C18H36O2And the molecular weight is 284.48.
The polyethylene glycol, plasticizer, stearic acid and sodium o-sulfonylbenzoylimide described above are all obtained in a commercially available manner.
In addition to the above embodiments, the adhesive further includes, in terms of weight percentage of the metal powder injection molding adhesive: 0.5-1 wt% of silane coupling agent and 0.1-0.2 wt% of antioxidant.
The silane coupling agent may be any one or a combination of polyether-modified dimethylsiloxane, methacryloxypropyltrimethoxysilane (KH 570), ethylenediamine-propyltriethoxysilane (KH 792) or vinyltriethoxysilane (a 151), and can achieve the effect of reducing the binding tension.
The antioxidant can adopt any one or combination of more of KL-1041 aqueous metal powder antioxidant, RY-P321 antioxidant, Q3270 antioxidant (No. SSQ-201) or 1010 antioxidant (No. 971201), and can achieve the effect of delaying oxidation.
On the basis of the above embodiment, the paint further comprises the following components in percentage by weight: 60-65 wt% of polyethylene glycol, 30-35 wt% of plasticizer, 4-5 wt% of stearic acid, 0.1-0.2 wt% of sodium o-sulfonylbenzoylimide, 0.5-1 wt% of silane coupling agent and 0.1-0.2 wt% of antioxidant.
On the basis of the above embodiment, further, the silane coupling agent is one or more of polyether modified dimethyl siloxane, methacryloxypropyl trimethoxy silane, or vinyl triethoxy silane.
It should be noted that the silane coupling agent is preferably polyether-modified dimethylsiloxane, the molecular weight of the polyether-modified dimethylsiloxane is not specifically limited in the present invention, and polyether-modified dimethylsiloxanes having the same effect in the prior art can be used.
On the basis of the above embodiment, further, the antioxidant is one or more of KL-1041 aqueous metal powder antioxidant, RY-P321 antioxidant or Q3270 antioxidant.
The antioxidant is preferably KL-1041 aqueous metal powder antioxidant.
On the basis of the above embodiment, further, the plasticizer is polymethyl methacrylate and/or polypropylene, wherein when the plasticizer is polymethyl methacrylate and polypropylene, the weight ratio of polymethyl methacrylate to polypropylene is (3-5): (3-5) based on the weight of the plasticizer.
The polymethyl methacrylate or polypropylene can be used as the plasticizer independently, or the polymethyl methacrylate and the polypropylene can be used as the plasticizer in combination, and the molding effect is better when the polymethyl methacrylate and the polypropylene are compounded and used according to the proportion.
In addition to the above embodiments, the molecular weight of the polyethylene glycol is 500 to 5000, and the molecular weight of the polymethyl methacrylate is 100 to 200 ten thousand.
Polyethylene glycol having a molecular weight of 500 to 5000 and polymethyl methacrylate having a molecular weight of 100 to 200 ten thousand are preferred as raw materials, and polyethylene glycol and polymethyl methacrylate having other molecular weights may be used.
In another embodiment of the present invention, there is provided a method for preparing the above binder for metal powder injection molding, comprising the steps of:
firstly, melting a certain amount of polyethylene glycol under a constant temperature condition;
as a preferred embodiment of this step, the temperature is set to 160 ℃ to 180 ℃, for example, polyethylene glycol is melted at a constant temperature of 170 ℃, and the heating method and the constant temperature equipment are not limited in the present invention.
Step two, respectively adding a certain amount of plasticizer, stearic acid and sodium o-sulfonylbenzoylimide into the step one, uniformly stirring and standing for a certain time;
as a preferred embodiment of the step, the standing time is set to be 20-40 min.
It should be noted that stirring and standing are required after each addition, and the time for each standing may be the same or different.
In another preferred embodiment of this step, in the second step, certain amounts of a silane coupling agent and an antioxidant are also added.
When the materials are added, the plasticizer can be added first, then the stearic acid, the sodium o-sulfonylbenzoylimide, the silane coupling agent and the antioxidant are added, or the components can be added respectively, and the adding sequence of the components is not limited.
And step three, cooling to obtain the uniform and milky adhesive.
The cooling method may be natural cooling or another cooling method.
The adhesive for metal powder injection molding and the preparation method thereof are suitable for metal powder, in particular for injection molding of titanium alloy powder.
The following are specific examples provided for the invention
Example 1
The adhesive for metal powder injection molding is 100kg in weight and comprises the following components in percentage by weight: 59wt% of polyethylene glycol, 34.8wt% of plasticizer (polymethyl methacrylate), 6wt% of stearic acid and 0.2wt% of sodium o-sulfonylbenzoylimide.
The preparation method of the adhesive for metal powder injection molding comprises the following steps:
firstly, melting a certain amount of polyethylene glycol at a constant temperature of 170 ℃; the constant temperature equipment selects an oil bath constant temperature stirring pan.
Step two, adding materials into the step one in three batches, uniformly stirring and standing for a certain time after each batch of materials is added; adding a certain amount of plasticizer in the first batch, uniformly stirring, standing for 30min, adding a certain amount of stearic acid in the second batch, uniformly stirring, and standing for 30 min; adding a certain amount of sodium o-sulfonylbenzoylimide into the third batch, stirring uniformly, and standing for 30 min.
And step three, naturally cooling to obtain the uniform and milky adhesive.
The adhesive of the present example was kneaded with titanium alloy powder, granulated, injection-molded, and degreased to produce a titanium alloy part. The titanium alloy powder comprises the following components in percentage by weight: 6.1wt% Al, 4.1 wt% V, 0.12wt% Fe, 0.01 wt% C, 0.15wt% O, less than 0.01 wt% N, 0.001 wt% H, and the balance Ti. Mixing the adhesive and the titanium alloy powder according to the mass ratio of 7:13, wherein the temperature is 150 ℃, the rotating speed of a mixer is 30r/min, and the mixing time is 2 h; in the granulation process, the mixed powder loading of the adhesive and the titanium alloy powder is 68%.
The mechanical property test is carried out according to the national standard method, and the result shows that the relative density of the titanium alloy part subjected to injection molding is 97%, the precision is +/-0.15%, the tensile strength is 950MPa, the yield strength is 933MPa, and the elongation is 10%.
Example 2
In this embodiment, the adhesive for metal powder injection molding has a weight of 100kg, and comprises the following components in percentage by weight: 50wt% of polyethylene glycol, 45wt% of plasticizer (polypropylene), 4.85wt% of stearic acid and 0.15wt% of sodium o-sulfonylbenzoylimide.
The preparation method of the adhesive for metal powder injection molding comprises the following steps:
firstly, melting a certain amount of polyethylene glycol at a constant temperature of 170 ℃; the constant temperature equipment selects an oil bath constant temperature stirring pan.
Step two, adding materials into the step one in three batches, uniformly stirring and standing for a certain time after each batch of materials is added; adding a certain amount of plasticizer in the first batch, uniformly stirring, standing for 20min, adding a certain amount of stearic acid in the second batch, uniformly stirring, and standing for 30 min; adding a certain amount of sodium o-sulfonylbenzoylimide into the third batch, stirring uniformly, and standing for 30 min.
And step three, naturally cooling to obtain the uniform and milky adhesive.
The method for producing a titanium alloy part by mixing and granulating the binder of this example and titanium alloy powder, injection molding, and degreasing was the same as in example 1.
The mechanical property test is carried out according to the national standard method, and the result shows that the relative density of the titanium alloy part subjected to injection molding is 98%, the precision is +/-0.16%, the tensile strength is 940MPa, the yield strength is 923MPa, and the elongation is 10%.
Example 3
In this embodiment, the adhesive for metal powder injection molding has a weight of 100kg, and comprises the following components in percentage by weight: 52wt% of polyethylene glycol, 43.8wt% of plasticizer (polypropylene and polymethyl methacrylate, the mass ratio of polypropylene to polymethyl methacrylate is 1: 1), 4wt% of stearic acid and 0.2wt% of sodium o-sulfonylbenzoylimide.
The preparation method of the adhesive for metal powder injection molding comprises the following steps:
firstly, melting a certain amount of polyethylene glycol at a constant temperature of 170 ℃; the constant temperature equipment selects an oil bath constant temperature stirring pan.
Step two, adding materials into the step one in three batches, uniformly stirring and standing for a certain time after each batch of materials is added; adding a certain amount of plasticizer in the first batch, uniformly stirring, standing for 20min, adding a certain amount of stearic acid in the second batch, uniformly stirring, and standing for 20 min; adding a certain amount of sodium o-sulfonylbenzoylimide into the third batch, stirring uniformly, and standing for 20 min.
And step three, naturally cooling to obtain the uniform and milky adhesive.
The method for producing a titanium alloy part by mixing and granulating the binder of this example and titanium alloy powder, injection molding, and degreasing was the same as in example 1.
Mechanical property tests are carried out according to the national standard method, and the results show that the relative density of the titanium alloy part subjected to injection molding is 98%, the precision is +/-0.13%, the tensile strength is 951MPa, the yield strength is 936MPa, and the elongation is 12%.
Example 4
In this embodiment, the adhesive for metal powder injection molding has a weight of 100kg, and comprises the following components in percentage by weight: 65wt% of polyethylene glycol, 30wt% of plasticizer (polymethyl methacrylate and polypropylene, the mass ratio of which is 5: 3), 4.9wt% of stearic acid and 0.1wt% of sodium o-sulfonylbenzoylimide.
The preparation method of the adhesive for metal powder injection molding comprises the following steps:
firstly, melting a certain amount of polyethylene glycol at a constant temperature of 170 ℃; the constant temperature equipment selects an oil bath constant temperature stirring pan.
Step two, adding materials into the step one in three batches, uniformly stirring and standing for a certain time after each batch of materials is added; adding a certain amount of plasticizer in the first batch, uniformly stirring, standing for 40min, adding a certain amount of stearic acid in the second batch, uniformly stirring, and standing for 40 min; adding a certain amount of sodium o-sulfonylbenzoylimide into the third batch, stirring uniformly, and standing for 40 min.
And step three, naturally cooling to obtain the uniform and milky adhesive.
The method for producing a titanium alloy part by mixing and granulating the binder of this example and titanium alloy powder, injection molding, and degreasing was the same as in example 1.
The mechanical property test is carried out according to the national standard method, and the result shows that the relative density of the titanium alloy part subjected to injection molding is 98.2%, the precision is +/-0.14%, the tensile strength is 949MPa, the yield strength is 932MPa, and the elongation is 12%.
Example 5
The adhesive for metal powder injection molding is 100kg in weight and comprises the following components in percentage by weight: 60wt% of polyethylene glycol, 35wt% of plasticizer (consisting of polymethyl methacrylate and polypropylene), 4wt% of stearic acid, 0.1wt% of sodium o-sulfonylbenzoylimide, 0.8wt% of silane coupling agent (polyether modified dimethyl siloxane) and 0.1wt% of antioxidant (KL-1041 aqueous metal powder antioxidant). The molecular weight of the polyethylene glycol is 500-5000, and the molecular weight of the polymethyl methacrylate is 100-200 ten thousand; the weight ratio of polymethyl methacrylate to polypropylene was 4: 3.
The preparation method of the adhesive for metal powder injection molding comprises the following steps:
firstly, melting a certain amount of polyethylene glycol at a constant temperature of 170 ℃; the constant temperature equipment selects an oil bath constant temperature stirring pan.
Step two, adding materials into the step one in three batches, uniformly stirring and standing for a certain time after each batch of materials is added; adding a certain amount of plasticizer in the first batch, uniformly stirring, standing for 30min, adding a certain amount of stearic acid in the second batch, uniformly stirring, and standing for 30 min; adding a certain amount of sodium o-sulfonylbenzoylimide, a silane coupling agent and an antioxidant into the third batch, uniformly stirring, and standing for 30 min.
And step three, naturally cooling to obtain the uniform and milky adhesive.
The method for producing a titanium alloy part by mixing and granulating the binder of this example and titanium alloy powder, injection molding, and degreasing was the same as in example 1.
The injection molding process of the titanium alloy part has good filling property, the size and the structure of the part are easy and accurate to control, the blank has good stability, and the mechanical property test is carried out according to the national standard method, and the result shows that the relative density of the titanium alloy part is 99.3%, the precision is +/-0.10%, the tensile strength is 998MPa, the yield strength is 937MPa, and the elongation is 13%.
Example 6
The adhesive for metal powder injection molding is 100kg in weight and comprises the following components in percentage by weight: 62 weight percent of polyethylene glycol, 32 weight percent of plasticizer (consisting of polymethyl methacrylate and polypropylene), 4.6 weight percent of stearic acid, 0.2 weight percent of sodium o-sulfonylbenzoylimide, 1 weight percent of silane coupling agent (methacryloxypropyltrimethoxysilane) and 0.2 weight percent of antioxidant (RY-P321 antioxidant). The molecular weight of the polyethylene glycol is 500-5000, and the molecular weight of the polymethyl methacrylate is 100-200 ten thousand; the weight ratio of polymethyl methacrylate to polypropylene was 3: 5.
The preparation method of the adhesive for metal powder injection molding comprises the following steps:
firstly, melting a certain amount of polyethylene glycol at a constant temperature of 160 ℃; the constant temperature equipment selects an oil bath constant temperature stirring pan.
Step two, adding materials into the step one in three batches, uniformly stirring and standing for a certain time after each batch of materials is added; adding a certain amount of plasticizer in the first batch, uniformly stirring, standing for 20min, adding a certain amount of stearic acid in the second batch, uniformly stirring, and standing for 20 min; adding a certain amount of sodium o-sulfonylbenzoylimide, a silane coupling agent and an antioxidant into the third batch, uniformly stirring, and standing for 20 min.
And step three, naturally cooling to obtain the uniform and milky adhesive.
The method for producing a titanium alloy part by mixing and granulating the binder of this example and titanium alloy powder, injection molding, and degreasing was the same as in example 1.
The injection molding process of the titanium alloy part has good filling property, the size and the structure of the part are easy to accurately control, the blank has good stability, and the mechanical property test is carried out according to the national standard method, and the result shows that the relative density of the titanium alloy part is 98.5 percent, the precision is +/-0.11 percent, the tensile strength is 953MPa, the yield strength is 930MPa, and the elongation is 13.5 percent.
Example 7
The adhesive for metal powder injection molding is 100kg in weight and comprises the following components in percentage by weight: 65wt% of polyethylene glycol, 30wt% of plasticizer (consisting of polymethyl methacrylate and polypropylene), 4.3wt% of stearic acid, 0.18wt% of sodium o-sulfonylbenzoylimide, 0.5wt% of silane coupling agent (vinyl triethoxysilane), and 0.12wt% of antioxidant (Q3270 antioxidant). The molecular weight of the polyethylene glycol is 500-5000, and the molecular weight of the polymethyl methacrylate is 100-200 ten thousand; the weight ratio of polymethyl methacrylate to polypropylene was 3: 4.
The preparation method of the adhesive for metal powder injection molding comprises the following steps:
firstly, melting a certain amount of polyethylene glycol at a constant temperature of 180 ℃; the constant temperature equipment selects an oil bath constant temperature stirring pan.
Step two, adding materials into the step one in three batches, uniformly stirring and standing for a certain time after each batch of materials is added; adding a certain amount of plasticizer in the first batch, uniformly stirring, standing for 40min, adding a certain amount of stearic acid in the second batch, uniformly stirring, and standing for 40 min; adding a certain amount of sodium o-sulfonylbenzoylimide, a silane coupling agent and an antioxidant into the third batch, uniformly stirring, and standing for 40 min.
And step three, naturally cooling to obtain the uniform and milky adhesive.
The method for producing a titanium alloy part by mixing and granulating the binder of this example and titanium alloy powder, injection molding, and degreasing was the same as in example 1.
The injection molding process of the titanium alloy part has good filling property, the size and the structure of the part are easy to accurately control, the blank has good stability, and the mechanical property test is carried out according to the national standard method, and the result shows that the relative density of the titanium alloy part is 98.5 percent, the precision is +/-0.11 percent, the tensile strength is 950MPa, the yield strength is 933MPa, and the elongation is 12.5 percent.
Example 8
The adhesive for metal powder injection molding is 100kg in weight and comprises the following components in percentage by weight: 50wt% of polyethylene glycol, 44wt% of plasticizer (consisting of polymethyl methacrylate and polypropylene), 5wt% of stearic acid, 0.16wt% of sodium o-sulfonylbenzoylimide, 0.7wt% of silane coupling agent (polyether modified dimethyl siloxane) and 0.14wt% of antioxidant (KL-1041 aqueous metal powder antioxidant). The molecular weight of the polyethylene glycol is 500-5000, and the molecular weight of the polymethyl methacrylate is 100-200 ten thousand; the weight ratio of polymethyl methacrylate to polypropylene was 4: 5.
The preparation method of the adhesive for metal powder injection molding comprises the following steps:
firstly, melting a certain amount of polyethylene glycol at the constant temperature of 175 ℃; the constant temperature equipment selects an oil bath constant temperature stirring pan.
Step two, adding materials into the step one in three batches, uniformly stirring and standing for a certain time after each batch of materials is added; adding a certain amount of plasticizer in the first batch, uniformly stirring, standing for 20min, adding a certain amount of stearic acid in the second batch, uniformly stirring, and standing for 20 min; adding a certain amount of sodium o-sulfonylbenzoylimide, a silane coupling agent and an antioxidant into the third batch, uniformly stirring, and standing for 30 min.
And step three, naturally cooling to obtain the uniform and milky adhesive.
The method for producing a titanium alloy part by mixing and granulating the binder of this example and titanium alloy powder, injection molding, and degreasing was the same as in example 1.
The injection molding process of the titanium alloy part has good filling property, the size and the structure of the part are easy to accurately control, the blank has good stability, and the mechanical property test is carried out according to the national standard method, and the result shows that the relative density of the titanium alloy part is 99.4%, the precision is +/-0.10%, the tensile strength is 989MPa, the yield strength is 940MPa, and the elongation is 14%.
Example 9
The adhesive for metal powder injection molding is 100kg in weight and comprises the following components in percentage by weight: 58wt% of polyethylene glycol, 35.5wt% of plasticizer (consisting of polymethyl methacrylate and polypropylene), 5.5wt% of stearic acid, 0.1wt% of sodium o-sulfonylbenzoylimide, 0.7wt% of silane coupling agent (polyether modified dimethyl siloxane) and 0.2wt% of antioxidant (KL-1041 aqueous metal powder antioxidant). The molecular weight of the polyethylene glycol is 500-5000, and the molecular weight of the polymethyl methacrylate is 100-200 ten thousand; the weight ratio of polymethyl methacrylate to polypropylene was 5: 4.
The preparation method of the adhesive for metal powder injection molding comprises the following steps:
firstly, melting a certain amount of polyethylene glycol at the constant temperature of 169 ℃; the constant temperature equipment selects an oil bath constant temperature stirring pan.
Step two, adding materials into the step one in three batches, uniformly stirring and standing for a certain time after each batch of materials is added; adding a certain amount of plasticizer in the first batch, uniformly stirring, standing for 20min, adding a certain amount of stearic acid in the second batch, uniformly stirring, and standing for 30 min; adding a certain amount of sodium o-sulfonylbenzoylimide, a silane coupling agent and an antioxidant into the third batch, uniformly stirring, and standing for 40 min.
And step three, naturally cooling to obtain the uniform and milky adhesive.
The method for producing a titanium alloy part by mixing and granulating the binder of this example and titanium alloy powder, injection molding, and degreasing was the same as in example 1.
In the injection molding process of the titanium alloy part, the filling property is better, the size and the structure of the part are easy to control accurately, and the stability of a blank is good; the mechanical property test is carried out according to the national standard method, and the detection result shows that the relative density of the titanium alloy part is 99.0%, the precision is +/-0.09%, the tensile strength is 966MPa, the yield strength is 941MPa, and the elongation is 13%.
Comparative example 1
The binder for metal powder injection molding in this comparative example was: the sodium o-sulfonylbenzoylimide in the binder component for injection molding of metal powder in example 1 was removed and the weight of polyethylene glycol, plasticizer and stearic acid was unchanged.
The preparation method of the binder for metal powder injection molding and the injection molding method of the titanium alloy part were the same as in example 1.
The mechanical property test is carried out according to the national standard method, and the test result shows that the relative density of the titanium alloy part manufactured by the comparative example is 95%, the precision is +/-0.4%, the tensile strength is 760MPa, the yield strength is 758MPa, and the elongation is 10%.
Comparative example 2
The adhesive for metal powder injection molding in the comparative example is an adhesive disclosed by titanium corporation of Haerbin, aerospace sea, and comprises the following components in percentage by mass: 20wt% of low-density polyethylene, 22wt% of polypropylene, 53wt% of paraffin, 3wt% of stearic acid and 2wt% of naphthalene.
The preparation method of the binder for metal powder injection molding and the injection molding method of the titanium alloy part were the same as in example 1.
The injection molding process of the titanium alloy part has poor plasticity and filling property, the control difficulty of the structure and the size of the part is high, and the degreasing process is complex. The mechanical property test is carried out according to the national standard method, and the test result shows that the relative density of the titanium alloy part manufactured by the comparative example is 97%, the precision is +/-0.28%, the tensile strength is 920MPa, the yield strength is 850MPa, and the elongation is 11%.
As can be seen from the above examples 1 to 9 and comparative examples 1 to 2, the adhesive for metal powder injection molding of the present invention exhibits good filling properties and stability during injection molding, does not discharge toxic substances during injection molding, and produces metal parts having excellent mechanical properties.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention and do not limit the spirit and scope of the present invention. Various modifications and improvements of the technical solutions of the present invention may be made by those skilled in the art without departing from the design concept of the present invention, and the technical contents of the present invention are all described in the claims.
Claims (10)
1. The adhesive for metal powder injection molding is characterized by comprising the following components in percentage by weight:
50-65 wt% of polyethylene glycol, 30-45 wt% of plasticizer, 4-6 wt% of stearic acid and 0.1-0.2 wt% of sodium o-sulfonylbenzoylimide.
2. The binder for metal powder injection molding according to claim 1, further comprising, in terms of weight percentage of the binder for metal powder injection molding: 0.5-1 wt% of silane coupling agent and 0.1-0.2 wt% of antioxidant.
3. The binder for metal powder injection molding according to claim 2, characterized by consisting of, in weight percent:
60-65 wt% of polyethylene glycol, 30-35 wt% of plasticizer, 4-5 wt% of stearic acid, 0.1-0.2 wt% of sodium o-sulfonylbenzoylimide, 0.5-1 wt% of silane coupling agent and 0.1-0.2 wt% of antioxidant.
4. The adhesive for metal powder injection molding according to any one of claims 2 to 3, wherein the silane coupling agent is one or more of polyether-modified dimethylsiloxane, methacryloxypropyltrimethoxysilane, and vinyltriethoxysilane.
5. The adhesive for metal powder injection molding according to any one of claims 2 to 4, wherein the antioxidant is one or more of a KL-1041 aqueous metal powder antioxidant, a RY-P321 antioxidant, or a Q3270 antioxidant.
6. The binder for metal powder injection molding according to any one of claims 1 to 5, wherein the plasticizer is polymethyl methacrylate and/or polypropylene, and when the plasticizer is polymethyl methacrylate and polypropylene, the weight ratio of the polymethyl methacrylate to the polypropylene is (3 to 5) to (3 to 5) based on the weight of the plasticizer.
7. The adhesive for metal powder injection molding according to claim 6, wherein the molecular weight of the polyethylene glycol is 500 to 5000, and the molecular weight of the polymethyl methacrylate is 100 to 200 ten thousand.
8. A method for preparing the binder for metal powder injection molding according to any one of claims 1 to 7, characterized by comprising the steps of:
firstly, melting a certain amount of polyethylene glycol under a constant temperature condition;
step two, respectively adding a certain amount of plasticizer, stearic acid and sodium o-sulfonylbenzoylimide into the step one, uniformly stirring and standing for a certain time;
and step three, cooling to obtain the uniform and milky adhesive.
9. The method according to claim 8, wherein in the second step, a certain amount of a silane coupling agent and an antioxidant are separately added.
10. The method for preparing a composite material according to claim 8 or 9, wherein in the first step, the temperature under constant temperature is 160 ℃ to 180 ℃;
and in the second step, the standing time is 20-40 min.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113414391A (en) * | 2021-07-12 | 2021-09-21 | 杭州铭赫科技有限公司 | Powder injection molding process |
| CN113523284A (en) * | 2021-05-25 | 2021-10-22 | 宁波市鑫瑞鸿新材料科技有限公司 | Rapid thermal desorption sintering integrated forming metal feed and application method thereof |
| CN114535565A (en) * | 2022-04-22 | 2022-05-27 | 中航迈特粉冶科技（北京）有限公司 | Metal powder antioxidant and surface modification method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101885614A (en) * | 2010-07-19 | 2010-11-17 | 北京科技大学 | Precursor water-soluble binder for powder injection molding and preparation method thereof |
| GB2511993A (en) * | 2011-11-30 | 2014-09-17 | Ritter Pharmaceuticals Inc | Prebiotic formulations and methods of use |
| CN104774574A (en) * | 2015-05-08 | 2015-07-15 | 南通长航船舶配件有限公司 | Automatic control cabinet used for large ship |
| CN105563616A (en) * | 2015-12-15 | 2016-05-11 | 东莞信柏结构陶瓷股份有限公司 | Forming method of zirconia ceramic products |
| CN108687343A (en) * | 2018-08-02 | 2018-10-23 | 东莞市依诺电子科技有限公司 | Burning accompanying anti-deformation sintering jig and material thereof |
-
2019
- 2019-11-13 CN CN201911107681.0A patent/CN110744050B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101885614A (en) * | 2010-07-19 | 2010-11-17 | 北京科技大学 | Precursor water-soluble binder for powder injection molding and preparation method thereof |
| GB2511993A (en) * | 2011-11-30 | 2014-09-17 | Ritter Pharmaceuticals Inc | Prebiotic formulations and methods of use |
| CN104774574A (en) * | 2015-05-08 | 2015-07-15 | 南通长航船舶配件有限公司 | Automatic control cabinet used for large ship |
| CN105563616A (en) * | 2015-12-15 | 2016-05-11 | 东莞信柏结构陶瓷股份有限公司 | Forming method of zirconia ceramic products |
| CN108687343A (en) * | 2018-08-02 | 2018-10-23 | 东莞市依诺电子科技有限公司 | Burning accompanying anti-deformation sintering jig and material thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113523284A (en) * | 2021-05-25 | 2021-10-22 | 宁波市鑫瑞鸿新材料科技有限公司 | Rapid thermal desorption sintering integrated forming metal feed and application method thereof |
| CN113414391A (en) * | 2021-07-12 | 2021-09-21 | 杭州铭赫科技有限公司 | Powder injection molding process |
| CN114535565A (en) * | 2022-04-22 | 2022-05-27 | 中航迈特粉冶科技（北京）有限公司 | Metal powder antioxidant and surface modification method |
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