CN102913446B - A kind of plunger and manufacture method thereof - Google Patents
A kind of plunger and manufacture method thereof Download PDFInfo
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- CN102913446B CN102913446B CN201210442226.8A CN201210442226A CN102913446B CN 102913446 B CN102913446 B CN 102913446B CN 201210442226 A CN201210442226 A CN 201210442226A CN 102913446 B CN102913446 B CN 102913446B
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- plunger
- chromium
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- iron
- nickel
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- 238000000034 method Methods 0.000 title claims abstract description 48
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 39
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 102
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 98
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 63
- 229910052742 iron Inorganic materials 0.000 claims abstract description 51
- 239000000203 mixture Substances 0.000 claims abstract description 51
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 49
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 48
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 48
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 48
- 239000011651 chromium Substances 0.000 claims abstract description 48
- 239000012188 paraffin wax Substances 0.000 claims abstract description 46
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 20
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 20
- 239000001257 hydrogen Substances 0.000 claims abstract description 20
- 238000005303 weighing Methods 0.000 claims abstract description 4
- 238000005245 sintering Methods 0.000 claims description 22
- 239000000843 powder Substances 0.000 claims description 15
- 229910000831 Steel Inorganic materials 0.000 claims description 12
- 238000002156 mixing Methods 0.000 claims description 12
- 239000010959 steel Substances 0.000 claims description 12
- 238000005260 corrosion Methods 0.000 abstract description 13
- 230000007797 corrosion Effects 0.000 abstract description 13
- UFGZSIPAQKLCGR-UHFFFAOYSA-N chromium carbide Chemical compound [Cr]#C[Cr]C#[Cr] UFGZSIPAQKLCGR-UHFFFAOYSA-N 0.000 abstract description 9
- 229910003470 tongbaite Inorganic materials 0.000 abstract description 9
- 239000000463 material Substances 0.000 abstract description 8
- 239000002994 raw material Substances 0.000 abstract description 7
- 230000007547 defect Effects 0.000 abstract description 4
- 230000008569 process Effects 0.000 description 13
- 239000010779 crude oil Substances 0.000 description 8
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 239000012071 phase Substances 0.000 description 4
- 239000010953 base metal Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000009713 electroplating Methods 0.000 description 3
- 239000007791 liquid phase Substances 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 239000003208 petroleum Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- -1 crome metal) Chemical compound 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 239000003129 oil well Substances 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 229910000746 Structural steel Inorganic materials 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- OKTJSMMVPCPJKN-YPZZEJLDSA-N carbon-10 atom Chemical compound [10C] OKTJSMMVPCPJKN-YPZZEJLDSA-N 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Powder Metallurgy (AREA)
Abstract
The present invention relates to mechanical field, especially relate to a kind of plunger and manufacture method thereof.Described plunger comprises: body and working lining; Described working lining is arranged on the outer circumferential face of described body.The manufacture method of plunger comprises: chromium, carbon, iron, nickel and paraffin are mixed to form mixture; Mixture is suppressed on the outer circumferential face of body, forms blank; Blank is sintered under hydrogen shield atmosphere; The blank sintered is processed into plunger; According to weighing scale, the content of chromium is 15%-20%; The content of described carbon is 5%-10%; The content of described iron is 30%-35%; The content of described nickel is 35%-40%; The content of described paraffin is 5%-10%.Form hard phase chromium carbide between chromium, carbon, improve the wear-resisting and decay resistance of material.Iron, nickel and paraffin avoid working lining to occur defect, improve the combination force between body.The wear resistance of working lining and corrosion resistance are more better than taking hard chrome as the working lining of raw material.
Description
Technical field
The present invention relates to mechanical field, especially relate to a kind of plunger and manufacture method thereof.
Background technique
Plunger pump is that one utilizes plunger to-and-fro motion in pump cylinder, makes to form volume between plunger and pump wall and changes, and repeatedly sucks and discharges liquid and increase the pump of its pressure.It is the important tool in the medium multiple field of such as hydraulic press, engineering machinery and boats and ships.Such as in field of petroleum exploitation, in the later stage of just exploiting oil field, because crude oil is constantly extracted out, the pressure of oilbearing stratum constantly declines, cause underground crude oil in a large number degassed (the gas state light hydrocarbon component in crude oil departs from away), former oil viscosity is increased, and the pressure causing crude oil cannot overcome the gravity of crude oil and the frictional force between crude oil and oil well and from oil well ejection, thus causes underground to remain a large amount of crude oil cannot to exploit out.In order to keep or improve the formation pressure of underground crude oil, plunger pump must be used to carry out water filling to oil field.
Plunger, as the main member of in plunger pump, is all generally be made up of metals such as iron and steel.Plunger, in the process used, needs to bear corrosion and the wearing and tearing in use of liquid.Along with liquid is to the corrosion of plunger, groove and hot spot can be formed gradually on the surface of plunger.And the hardness of the plunger be made of metal is relatively little, in the process used, easily cause wearing and tearing.The sealability that corrosion and wearing and tearing result between plunger and pump cylinder declines, once sealability drops to a certain degree, just needs to change plunger.In order to extend the service time of plunger, existing way is that the mode of electroplating on the surface of plunger plates one deck hard chrome (i.e. crome metal), makes hard chrome form one deck working lining (i.e. surface wear-resistant layer) on the surface of plunger.Such as, existing plunger is that the steel outer surface being 42CrMo in model plates the thick hard chrome of one deck 0.1 millimeter (mm).42CrMo hardness after Overheating Treatment reaches HRC50(Rockwell hardness), and the hardness of hard chrome is at HRC60-HRC63, and hard chrome has better corrosion resistance than metals such as iron and steel, therefore at electroplating surface one deck hard chrome of metal plunger, liquid can be reduced to the corrosion of plunger and plunger wearing and tearing in use.
But this plunger is in the process used, and its hardness and corrosion resistance still can not meet the demand of user.Such as in field of petroleum exploitation, the existing plunger being coated with hard chrome generally uses more than 20 skies just to need to change once, and each replacing all needs the time of at substantial, have impact on the efficiency of petroleum production.
Summary of the invention
The present invention proposes a kind of plunger and manufacture method thereof, the hardness of plunger working lining can be improved, extend the service time of plunger.
In order to achieve the above object, technological scheme of the present invention is achieved in that
A kind of plunger, comprising: body and working lining; Described working lining is arranged on the outer circumferential face of described body;
Described working lining by weight percentage, comprising: chromium 15%-20%, carbon 5%-10%, iron 30%-35%, nickel 35%-40%, paraffin 5%-10%.
Preferably, described working lining by weight percentage, comprising: chromium 16%, carbon 6%, iron 30%, nickel 40%, paraffin 8%.
Preferably, the thickness of described working lining is 0.4mm-0.6mm.
Preferably, described body is made up of No. 45 steel.
A manufacture method for plunger, comprising:
Chromium, carbon, iron, nickel and paraffin are mixed to form mixture; Wherein, according to weighing scale, in described mixture, the content of chromium is 15%-20%; The content of described carbon is 5%-10%; The content of described iron is 30%-35%; The content of described nickel is 35%-40%; The content of described paraffin is 5%-10%;
Mixture is suppressed on the outer circumferential face of body, forms blank;
Blank is sintered under hydrogen shield atmosphere;
The blank sintered is processed into plunger.
Preferably, in described mixture, the content of chromium is 16%; The content of described carbon is 6%; The content of described iron is 30%; The content of described nickel is 40%; The content of described paraffin is 8%.
Preferably, described chromium, carbon, iron, nickel and paraffin are granularity is 150 order-300 object powder;
Chromium, carbon, iron, nickel and paraffin are mixed to form mixture be specially: by the powder mixing 60min-70min of above-mentioned chromium, carbon, iron, nickel and paraffin in three-dimensional mixer.
Preferably, describedly mixture is suppressed on the outer circumferential face of body, form blank be under the pressure of 9.5MPa-10.5Mpa, the thickness of described mixture is 9mm-11mm.
Preferably, described sintering is to described blank sintering 3.75h-4.25h at the temperature of 1100 DEG C-1120 DEG C.
Preferably, described mixture is suppressed to be formed on the outer circumferential face of body blank and described blank is sintered under hydrogen shield atmosphere between also comprise:
At the temperature of 275 DEG C-280 DEG C, blank is dried;
The time of described oven dry is 2.75h-3.25h.
The manufacture method of plunger provided by the invention compared to existing technologies, by chromium, carbon, iron, nickel and paraffin are mixed to form mixture; Mixture is suppressed on the outer circumferential face of body, forms blank; Blank is sintered under hydrogen shield atmosphere; Wherein, in the process manufactured, between chromium, carbon, form hard phase chromium carbide, improve the wear-resisting and decay resistance of material.Iron, nickel are liquid-phase sintering, substantially stop the space between powder, avoid occurring defect, and form minority specioz with base metal, improve the combination force between body, avoid working lining in use to come off with body.The hardness of chromium carbide can reach about HRC68.Iron, nickel and paraffin, in the process manufactured, can make raw material better mix and easilier mixture is pressed into body gets on.And then the wear resistance of the working lining on the plunger of final production and corrosion resistance are more better than taking hard chrome as the working lining of raw material.
And be pressed on body due to working lining, therefore the thickness of working lining can be controlled by the thickness of mixture during compacting, and therefore user according to the actual demand of oneself, can select the thickness of different working linings.Especially the thickness of working lining is at 0.4mm-0.6mm, compared to prior art, main body is electroplated the working lining of one deck 0.1mm, and plunger provided by the present invention is in the process used, and coarse granule impurity is not easy working lining to pierce through.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technological scheme of the prior art, introduce doing one to the accompanying drawing used required in embodiment or description of the prior art simply below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the schematic cross-section of the plunger that the embodiment of the present invention one provides;
Fig. 2 is the flow chart of the manufacture method of the plunger that the embodiment of the present invention three provides;
Fig. 3 is the flow chart of the manufacture method of the plunger that the embodiment of the present invention four provides;
Fig. 4 is the flow chart of the manufacture method of the plunger that the embodiment of the present invention five provides;
Fig. 5 is the flow chart of the manufacture method of the plunger that the embodiment of the present invention six provides;
Fig. 6 is the flow chart of the manufacture method of the plunger that the embodiment of the present invention seven provides;
Fig. 7 is the flow chart of the manufacture method of the plunger that the embodiment of the present invention eight provides.
Embodiment
For making the object of the embodiment of the present invention, technological scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, technological scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Plunger provided by the present invention and manufacture method thereof, utilize high pressure to be pressed on body the mixture that chromium, carbon, iron, nickel and paraffin form to form working lining, and pass through high temperature sintering, formation hardness and corrosion resistance are all better than the chromium carbide of hard chrome, and the thickness of its working lining can need to select according to the difference of user, therefore, it is possible to improve the hardness of plunger working lining, extend the service time of plunger.
Fig. 1 is the sectional view of the plunger that the embodiment of the present invention one provides, shown in Figure 1, and the plunger that the present embodiment one provides comprises: body 1 and working lining 2; Described working lining 2 is arranged on the outer circumferential face of described body 1; Described working lining 2 by weight percentage, comprising: chromium 15%-20%, carbon 5%-10%, iron 30%-35%, nickel 35%-40%, paraffin 5%-10%.
In the present embodiment one, by chromium, carbon, iron, nickel and paraffin are mixed to form mixture by weight in certain proportion; Mixture is suppressed on the outer circumferential face of body 1, forms blank; Blank is sintered under hydrogen shield atmosphere, thus form working lining 2 on the outer circumferential face of body 1; In the process manufactured, between chromium, carbon, form hard phase chromium carbide, improve the wear-resisting and decay resistance of material.Iron, nickel are liquid-phase sintering, substantially stop the space between powder, avoid occurring defect, and form minority specioz with base metal, improve the combination force between body, avoid working lining in use to come off with body.And then the wear resistance of the working lining on the plunger of final production and corrosion resistance are more better than taking hard chrome as the working lining of raw material.
In the plunger that the embodiment of the present invention two provides, described working lining 2 by weight percentage, comprising: chromium 16%, carbon 6%, iron 30%, nickel 40%, paraffin 8%.Like this, the hardness of the final hard phase chromium carbide formed can reach HRC68, and its hardness in the hardness of electroplating surface one deck hard chrome of body 1, and then can improve the hardness of plunger working lining in prior art, extends the service time of plunger.
In above-described embodiment one and embodiment two, the thickness of described working lining is 0.4mm-0.6mm, and compared to prior art, higher thickness makes plunger in the process used, and coarse granule impurity can be avoided to be pierced through by working lining and be the wearing and tearing that plunger brings.Further, working lining 2 and body 1 to be combined owing to applying the coercive method in the present invention, therefore, user according to the actual demand of oneself, can select the thickness that working lining 2 is different.
In above-described embodiment one and embodiment two, because price of steel product is cheap, and be easy to processing, therefore, described body 1 is made up of steel.Preferably, described body 1 is made up of No. 45 steel.No. 45 steel are high-quality carbon element structural steel, and Cutting free is processed, and is commonly used to do template, mortise pin, guide pillar etc. in mould.The maximum hardness of No. 45 steel practical applications is HRC55, after the part quenching with Subsequent tempering that No. 45 steel are made, there is good comprehensive mechanical performance, be widely used in various important constitutional detail, particularly those connecting rods worked under stress alternation, bolt, gear and axle class etc.Therefore No. 45 steels are used to make the body 1 of plunger.
See Fig. 2, the manufacture method of the plunger that the embodiment of the present invention three provides comprises:
Step 101: chromium, carbon, iron, nickel and paraffin are mixed to form mixture;
Step 102: mixture is suppressed form blank on the outer circumferential face of body;
Step 103: blank is sintered under hydrogen shield atmosphere;
Step 104: the blank sintered is processed into plunger.
Wherein, according to weighing scale, in described mixture, the content of chromium is 15%-20%; The content of described carbon is 5%-10%; The content of described iron is 30%-35%; The content of described nickel is 35%-40%; The content of described paraffin is 5%-10%;
In the present invention chromium, carbon, iron, nickel and paraffin are mixed to form mixture; Mixture is suppressed on the outer circumferential face of body, forms blank; Blank is sintered under hydrogen shield atmosphere; The blank sintered is processed into plunger.Wherein, in the process manufactured, between chromium, carbon, form hard phase chromium carbide, improve the wear-resisting and decay resistance of material.Iron, nickel are liquid-phase sintering, substantially stop the space between powder, avoid occurring defect, and form minority specioz with base metal, improve the combination force between body, avoid working lining in use to come off with body.Iron, nickel and paraffin, in the process manufactured, can make raw material better mix and easilier mixture is pressed into body gets on.And then the wear resistance of the working lining on the plunger of final production and corrosion resistance are more better than taking hard chrome as the working lining of raw material.
In the present embodiment three, the object of hydrogen sintering is to provide a kind of reducing atmosphere, because powder is thin, in links such as storage, transport, batch mixing and oven dry by air impact, there is oxidation in various degree, needs to carry out reduction treatment to oxidized powder.In addition, if do not have atmosphere protection when high temperature sintering, powder is more easily oxidized, and in conjunction with these two kinds of reasons, needs under the atmosphere of hydrogen shield during sintering.
In each mode of execution of the manufacture method of plunger provided by the present invention, preferably, in described mixture, the content of chromium is 16%; The content of described carbon is 6%; The content of described iron is 30%; The content of described nickel is 40%; The content of described paraffin is 8%.The hardness that the hardness of the working lining 2 of the plunger manufactured according to this ratio can reach chromium carbide can reach about HRC68.Hardness than hard chrome is better, and corrosion resistance is stronger, and then the wear resistance of working lining on the plunger of final production and corrosion resistance are more better than taking hard chrome as the working lining of raw material.
In each mode of execution of the manufacture method of plunger provided by the present invention, preferably, described chromium, carbon, iron, nickel and paraffin are granularity is 150 order-300 object powder.Further, describedly chromium, carbon, iron, nickel and paraffin are mixed to form mixture are specially: by the powder mixing 60min-70min of above-mentioned chromium, carbon, iron, nickel and paraffin in three-dimensional mixer.
Be 150 order-300 object powder because chromium, carbon, iron, nickel and paraffin are granularity, and the time of mixing is at 60min-70min, therefore using three-dimensional mixer when mixing chromium, carbon, iron, nickel and paraffin, this several pulverous material can be mixed uniformly, in follow-up manufacture process, can make fully to react between each material, the character reducing the working lining caused because material mixing is uneven is uneven.Preferably, it is 200 orders that described chromium, carbon, iron, nickel and paraffin are granularity, by the powder mixing 65min of above-mentioned chromium, carbon, iron, nickel and paraffin in three-dimensional mixer.
In each mode of execution of the manufacture method of plunger provided by the present invention, preferably, describedly mixture is suppressed on the outer circumferential face of body, form blank be under the pressure of 9.5MPa-10.5Mpa, the thickness of described mixture is 9mm-11mm.
Mixed uniformly chromium, carbon, iron, nickel and paraffin can force together by the pressure of 9.5MPa-10.5Mpa closely, and before compacting, the thickness of described mixture is 9mm-11mm, and after having suppressed, the blank of the working lining of formation is 0.4mm-0.6mm.Like this, ensure that the varied in thickness of working lining in follow-up manufacture process is little, and the density of working lining is enough large.Preferably, be that described the compacting by mixture of 10.1mm forms blank on the outer circumferential face of body by thickness under the pressure of 10Mpa.
In each mode of execution of the manufacture method of plunger provided by the present invention, preferably, described sintering is to described blank sintering 3.75h-4.25h at the temperature of 1100 DEG C-1120 DEG C.
Between 1100 DEG C-1120 DEG C, blank is sintered under hydrogen shield atmosphere, the chromium in the blank of working lining and carbon can be made to react Chromium Carbide Formation fast, also ensure that and turn over reaction between other materials.The time of sintering is 3.75h-4.25h, ensure that fully carrying out of reaction, can not waste energy again because of crossing sintering for a long time.Preferably, at the temperature of 1110 DEG C, blank is introduced 4h under hydrogen shield atmosphere.
See Fig. 3; in each embodiment four kinds of the manufacture method of plunger provided by the present invention; preferably, described mixture is suppressed to be formed on the outer circumferential face of body blank and described blank is sintered under hydrogen shield atmosphere between also comprise: blank is dried.
And then the manufacture method of described plunger comprises:
Step 201: chromium, carbon, iron, nickel and paraffin are mixed to form mixture;
Step 202: mixture is suppressed form blank on the outer circumferential face of body;
Step 203: blank is dried;
Step 204: the blank of oven dry is sintered under hydrogen shield atmosphere;
Step 205: the blank sintered is processed into plunger.
Wherein, dry and carry out at the temperature of 275 DEG C-280 DEG C, the time of described oven dry is 2.75h-3.25h.
Because chromium, carbon, iron, nickel and paraffin are powder, when therefore exposing aerial, moisture in easy absorbed air, and moisture is training meeting and the reaction of chromium, carbon, iron, nickel and paraffin in the process sintered to hair, the hardness of the upper working lining of hair training after the final sintering of impact, therefore, before sintering hair training, need hair training to dry.Dry and carry out at the temperature of 275 DEG C-280 DEG C, drying time is 2.75h-3.25h, can be dried by the moisture in the blank of working lining fully, ensures the effect of sintering.Preferably, dry and carry out at the temperature of 277 DEG C, the time of oven dry is 3h.
Shown in Figure 4, on the basis of above-described embodiment three, embodiment four and each embodiment, in the manufacture method of the plunger that the embodiment of the present invention five provides, comprising:
Step 301: by weight percentage, is the Powdered chromium 15%-20% of 150 order-300 object, carbon 5%-10%, iron 30%-35%, nickel 35%-40% and paraffin 5%-10% in three-dimensional mixer by granularity, mixing 60min-70min, forms mixture.
Step 302: be that the mixture of 9mm-11mm is suppressed form blank on the outer circumferential face of body by thickness under the pressure of 9.5MPa-10.5Mpa.
Step 303: at the temperature of 275 DEG C-280 DEG C, blank is carried out oven dry 2.75h-3.25h.
Step 304: be, at the temperature of 1100 DEG C-1120 DEG C, blank is carried out sintering 3.75h-4.25h under hydrogen shield atmosphere in temperature.
Step 305: the blank sintered is processed into plunger.
Shown in Figure 5, on the basis of above-described embodiment three and each embodiment, in the manufacture method of the plunger that the embodiment of the present invention six provides, comprising:
Step 401: by weight percentage, in three-dimensional mixer by granularity is the Powdered chromium 16% of 200 object, carbon 6%, iron 30%, nickel 40% and paraffin 8%, mixing 65min, formed mixture.
Step 402: be that the mixture of 10mm is suppressed form blank on the outer circumferential face of body by thickness under the pressure of 10MPa.
Step 403: at the temperature of 277 DEG C, blank is carried out oven dry 3h.
Step 404: be, at the temperature of 1110 DEG C, blank is carried out sintering 4h under hydrogen shield atmosphere in temperature.
Step 405: the blank sintered is processed into plunger.
Shown in Figure 6, on the basis of above-described embodiment three and each embodiment, in the manufacture method of the plunger that the embodiment of the present invention seven provides, comprising:
Step 501: by weight percentage, in three-dimensional mixer by granularity is the Powdered chromium 15% of 150 object, carbon 5%, iron 30%, nickel 40% and paraffin 10%, mixing 60min, formed mixture.
Step 502: be that the mixture of 9mm is suppressed form blank on the outer circumferential face of body by thickness under the pressure of 9.5MPa.
Step 503: at the temperature of 275 DEG C, blank is carried out oven dry 2.75.
Step 504: be, at the temperature of 1100 DEG C, blank is carried out sintering 3.75 under hydrogen shield atmosphere in temperature.
Step 505: the blank sintered is processed into plunger.
Shown in Figure 7, on the basis of above-described embodiment three and each embodiment, in the manufacture method of the plunger that the embodiment of the present invention eight provides, comprising:
Step 601: by weight percentage, in three-dimensional mixer by granularity is the Powdered chromium 20% of 300 object, carbon 10%, iron 30%, nickel 35% and paraffin 5%, mixing 70min, formed mixture.
Step 602: be that the mixture of 11mm is suppressed form blank on the outer circumferential face of body by thickness under the pressure of 10.5MPa.
Step 603: at the temperature of 280 DEG C, blank is carried out oven dry 3.25h.
Step 604: be, at the temperature of 1120 DEG C, blank is carried out sintering 4.25h under hydrogen shield atmosphere in temperature.
Step 605: the blank sintered is processed into plunger.
Last it is noted that above embodiment is only in order to illustrate technological scheme of the present invention, be not intended to limit; Although with reference to previous embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technological scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technological scheme.
Claims (10)
1. a plunger, is characterized in that, comprising: body and working lining; Described working lining is arranged on the outer circumferential face of described body;
Described working lining by weight percentage, by: chromium 15%-20%, carbon 5%-10%, iron 30%-35%, nickel 35%-40%, paraffin 5%-10% form;
The mixture that described working lining is mixed to form by described chromium, carbon, iron, nickel and paraffin is after the compacting of described body surface forms blank and to sinter in a hydrogen atmosphere and formed.
2. plunger according to claim 1, is characterized in that, described working lining by weight percentage, comprising: chromium 16%, carbon 6%, iron 30%, nickel 40%, paraffin 8%.
3. plunger according to claim 1 and 2, is characterized in that, the thickness of described working lining is 0.4mm-0.6mm.
4. plunger according to claim 1 and 2, is characterized in that, described body is made up of No. 45 steel.
5. a manufacture method for plunger, is characterized in that, comprising:
Chromium, carbon, iron, nickel and paraffin are mixed to form mixture;
Mixture is suppressed on the outer circumferential face of body, forms blank;
Blank is sintered under hydrogen shield atmosphere;
The blank sintered is processed into plunger;
Wherein, according to weighing scale, in described mixture, the content of chromium is 15%-20%; The content of described carbon is 5%-10%; The content of described iron is 30%-35%; The content of described nickel is 35%-40%; The content of described paraffin is 5%-10%.
6. the manufacture method of plunger according to claim 5, is characterized in that, in described mixture, the content of chromium is 16%; The content of described carbon is 6%; The content of described iron is 30%; The content of described nickel is 40%; The content of described paraffin is 8%.
7. the manufacture method of plunger according to claim 5, is characterized in that, it is 150 order-300 object powder that described chromium, carbon, iron, nickel and paraffin are granularity;
Chromium, carbon, iron, nickel and paraffin are mixed to form mixture be specially: by the powder mixing 60min-70min of above-mentioned chromium, carbon, iron, nickel and paraffin in three-dimensional mixer.
8. the manufacture method of plunger according to claim 5, is characterized in that, describedly mixture is suppressed on the outer circumferential face of body, form blank be under the pressure of 9.5MPa-10.5Mpa, and the thickness of described mixture is 9mm-11mm.
9. the manufacture method of plunger according to claim 5, is characterized in that, described sintering is to described blank sintering 3.75h-4.25h at the temperature of 1100 DEG C-1120 DEG C.
10. the manufacture method of plunger according to claim 5, is characterized in that, described mixture is suppressed to be formed on the outer circumferential face of body blank and described blank is sintered under hydrogen shield atmosphere between also comprise:
At the temperature of 275 DEG C-280 DEG C, blank is dried;
The time of described oven dry is 2.75h-3.25h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210442226.8A CN102913446B (en) | 2012-11-07 | 2012-11-07 | A kind of plunger and manufacture method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210442226.8A CN102913446B (en) | 2012-11-07 | 2012-11-07 | A kind of plunger and manufacture method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102913446A CN102913446A (en) | 2013-02-06 |
| CN102913446B true CN102913446B (en) | 2015-10-21 |
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| CN201210442226.8A Expired - Fee Related CN102913446B (en) | 2012-11-07 | 2012-11-07 | A kind of plunger and manufacture method thereof |
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