CN102605273B - Steel bonded hard alloy and preparation method thereof - Google Patents
Steel bonded hard alloy and preparation method thereof Download PDFInfo
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Abstract
The invention provides steel bonded hard alloy which comprises the following components: 1.5wt%-6.0wt% of refractory carbide, 1.0wt%-3.0wt% of WS2, 1.0wt%-3.0wt% of C, 0.1wt%-0.5wt% of Mn, 10.0wt%-18.0wt% of Cr, 1.0wt%-5.0wt% of Mo, more than 0 but less than or equal to 1.8wt% of Si, more than 0 but less than or equal to 5.0wt% of Ni, and the balance of Fe. The invention also provides a preparation method for the steel bonded hard alloy. The raw materials, such as refractory carbide, tungsten disulfide, carbon and chromium are added in the steel bonded hard alloy, and a powder metallurgy sintering technology and a thermal treatment technology are adopted, so that the strength and hardness of the steel bonded hard alloy are increased, the abrasive resistance of the steel bonded hard alloy is increased and the service life of a stirring shaft abrasion-resisting sleeve prepared from the steel bonded hard alloy is prolonged.
Description
Technical field
The present invention relates to metal field, relate in particular to a kind of Steel Bond Hard Alloy and preparation method thereof.
Background technology
Along with the high speed development of science and technology and modern industry, the running speed of mechanical means is more and more higher, and the speed that the part rubbed is worn is also more and more faster, becomes the principal element that affects production efficiency its work-ing life.Although fret wear is difficult to cause the catastrophic harm of metal works, the energy that it causes and the consumption of material are very surprising.Therefore, the research and development high-abrasive material, to reduce the wearing and tearing of material, has been subject to people and has more and more paid close attention to.
High-abrasive material is the core of field of new, is the important foundation material of the high-tech sector such as information technology, biotechnology and energy technology and national defense construction, also to transforming some conventional industries, plays an important role simultaneously.In recent years, research and development and the practical application of high-abrasive material have obtained major progress, and it has experienced the several stages from high mangaenese steel, ordinary white cast iron, ni-hard cast iron to rich chromium cast iron, has developed at present wear resisting steel and the large class of antifriction cast iron two.High-abrasive material is more is applied to engineering machinery field.Pumping machine is the common equipment of engineering machinery, and the wear resistance of the stir shaft wear-resistant sleeve in pumping machine directly affects the work-ing life of pumping machine stirring mechanism.Stir shaft wear-resistant sleeve in pumping machine be take tin zinc-copper, bearing steel, rich chromium cast iron or rapid steel as raw material, and adopt hard chrome plating, carburizing and quenching or the technique preparation such as surfaces nitrided, but in use stir shaft wear-resistant sleeve wear resistance is lower, its work-ing life is shorter.
The Chinese patent literature that application number is 201010171962.5 discloses a kind of rapid steel and production technique thereof, its disclosed rapid steel comprises: the C of 1.0wt%～1.4wt%, the Cr of 3.8wt%～4.2wt%, the Mo of 4.8wt%～5.2wt%, the W of 6.3wt%～6.5wt%, the Co of 8.2wt%～8.4wt%, the V of 2.3wt%～3.0wt%, the Nb of 1.04wt%～1.5wt%, the Si of 0.2wt%～0.4wt%, the S of 0～0.03wt%, the P of 0～0.03wt%, the Mn of 0～0.4wt%, the Fe of surplus and inevitable impurity; Its production technique comprises: (1) burden process; (2) melting process; (3) spray deposition operation; (4) air cooling operation; (5) annealing operation; (6) hot forging process; (7) Q-tempering operation.Although the disclosed H.S.S. production technique of this patent has to a certain degree improved its intensity, hardness and wear resistance, but, use it for the stir shaft wear-resistant sleeve of engineering pumping machine, stir shaft wear-resistant sleeve wear resistance is on the low side in actual applications, wearing and tearing very easily occur, shortened the work-ing life of wear-resistant sleeve.
Summary of the invention
The technical problem that the present invention solves is to provide a kind of Steel Bond Hard Alloy with excellent abrasive resistance and preparation method thereof.
The invention discloses a kind of Steel Bond Hard Alloy, comprising:
The refractory carbides of 1.5wt%～6.0wt%;
The WS of 1.0wt%～3.0wt%
2;
The C of 1.0wt%～3.0wt%;
The Mn of 0.1wt%～0.5wt%;
The Cr of 10.0wt%～18.0wt%;
The Mo of 1.0wt%～5.0wt%;
Be greater than zero and be less than or equal to the Si of 1.8wt%;
Be greater than zero and be less than or equal to the Ni of 5.0wt%;
Surplus is iron.
Preferably, described refractory carbides is WC, TiC, VC, NbC, Cr
3c
2with one or more in SiC.
The invention also discloses a kind of preparation method of Steel Bond Hard Alloy, comprise the following steps:
A) raw material of following composition is mixed, obtain mixed powder: the refractory carbides powder of 1.5wt%～6.0wt%, the curing tungsten powder of 1.0wt%～3.0wt%; The carbon dust of 1.0wt%～3.0wt%, the manganese powder of 0.1wt%～0.5wt%, the chromium powder of 10.0wt%～18.0wt%, the molybdenum powder of 1.0wt%～5.0wt%, be greater than zero and be less than or equal to the silica flour of 1.8wt%, be greater than zero and be less than or equal to the nickel powder of 5.0wt%, surplus is iron powder;
B) by described mixed powder extrusion forming, obtain the Steel Bond Hard Alloy base substrate;
C), by described Steel Bond Hard Alloy blank sintering, sintering temperature is 1130 ℃～1310 ℃;
D) by step c) the Steel Bond Hard Alloy base substrate that obtains carries out quench treatment and temper, obtains Steel Bond Hard Alloy.
Preferably, described refractory carbides powder is WC powder, TiC powder, VC powder, NbC powder, Cr
3c
2one or more in powder and SiC powder.
Preferably, the granularity of described iron powder is 100 orders～200 orders, the granularity of described carbon dust is 300 orders～400 orders, and the granularity of described refractory carbides powder is 300 orders～600 orders, and the granularity of described manganese powder, chromium powder, molybdenum powder, silica flour and nickel powder is respectively 200 orders～300 orders.
Preferably, the mixing time that step is mixed described in a) is 60min～180min.
Preferably, step b), the pressure of pressurization is 700MPa～900MPa.
Preferably, sintering step c) is sintering in a vacuum.
Preferably, the temperature of quench treatment steps d) is 800 ℃～1100 ℃.
Preferably, the temperature of temper steps d) is 200 ℃～600 ℃.
The invention provides a kind of Steel Bond Hard Alloy, comprising: the refractory carbides of 1.5wt%～6.0wt%, the WS of 1.0wt%～3.0wt%
2, the C of 1.0wt%～3.0wt%, the Mn of 0.1wt%～0.5wt%, the Cr of 10.0wt%～18.0wt%, the Mo of 1.0wt%～5.0wt%, be greater than zero and be less than or equal to the Si of 1.8wt%, is greater than zero and be less than or equal to the Ni of 5.0wt%, and surplus is iron.Added refractory carbides in Steel Bond Hard Alloy, it has improved intensity and the hardness of alloy as the hard phase of Steel Bond Hard Alloy; WS
2add in alloy as anti-friction composition, reduced the frictional coefficient of alloy, make alloy there is good self lubricity; Carbon is the element that enlarges the γ phase region, and solid solution is solution strengthening effect in iron, forms carbide with ferro element simultaneously, improves intensity and the hardness of matrix; The chromium added dwindles the γ phase region of Fe, and forms continuous solid solution with Fe, also forms intermetallic compound σ phase (FeCr) and multiple carbide, has further improved intensity and the hardness of matrix.
The present invention is in the preparation process of Steel Bond Hard Alloy, and take refractory carbides powder, curing tungsten powder, chromium powder, carbon dust, manganese powder, silica flour and molybdenum powder is raw material, after powder metallurgy sintered operation and heat treatment step, has obtained Steel Bond Hard Alloy.In powder metallurgy sintered process, fine hard particles is dispersed in matrix, has improved intensity and the hardness of matrix; Thermal treatment has subsequently realized martensitic transformation, has improved the hardenability of body material simultaneously, has obtained the matrix of homogeneous microstructure, has improved intensity, hardness and the wear resistance of Steel Bond Hard Alloy.Steel Bond Hard Alloy prepared by the present invention is applied to the stir shaft wear-resistant sleeve of engineering pumping machine, during by the friction of the macromolecular material antithesis such as itself and urethane, has shown good self-lubricating property, has improved the wear resistance of wear-resistant sleeve, has extended its work-ing life.The hardness that experiment showed, Steel Bond Hard Alloy of the present invention is 45HRC～65HRC, and tensile strength is 150kg/mm
2～180kg/mm
2, tensile strength is higher than 300kg/mm
2, impelling strength is 0.6kg/cm
2～0.9kg/cm
2.
Embodiment
In order further to understand the present invention, below in conjunction with embodiment, the preferred embodiment of the invention is described, but should be appreciated that these are described is for further illustrating the features and advantages of the present invention, rather than limiting to the claimed invention.
Steel Bond Hard Alloy, also claim steel-bonded carbide, and it is to take the refractory metal hard compounds as hard phase, the Wimet that the steel of usining is made as Binder Phase.Steel-bonded carbide hard phase proportion in alloy is not less than 30wt%.The invention discloses a kind of novel Steel Bond Hard Alloy, it take a small amount of refractory carbides (lower than 6wt%) is hard phase, make Binder Phase with high-content carbon, chromium steel, make with powder metallurgy process, also can be by this kind of alloy called after class Steel Bond Hard Alloy.
The embodiment of the invention discloses a kind of Steel Bond Hard Alloy, comprise the refractory carbides of 1.5wt%～6.0wt%, the WS of 1.0wt%～3.0wt%
2, the C of 1.0wt%～3.0wt%, the Mn of 0.1wt%～0.5wt%, the Cr of 10.0wt%～18.0wt%, the Mo of 1.0wt%～5.0wt%, be greater than zero and be less than or equal to the Si of 1.8wt%, is greater than zero and be less than or equal to the Ni of 5.0wt%, and surplus is iron.
C can enhanced oxide reduction, the effect of its solid solution solution strengthening in iron also forms carbide with ferro element and element silicon simultaneously, increases the wear resistance of material.The C content of Steel Bond Hard Alloy provided by the invention is 1.0wt%～3.0wt%, is preferably 1.5wt%～3.0wt%.
Mn improves the oxidation-resistance of matrix, body material is difficult for oxidized.The Mn content of Steel Bond Hard Alloy provided by the invention is 0.1wt%～0.5wt%, is preferably 0.25wt%～0.5wt%.
Cr effectively improves the hardening capacity of matrix, is the key element of realizing martensitic transformation.The Cr content of Steel Bond Hard Alloy provided by the invention is 10.0wt%～18.0wt%, is preferably 13.0wt%～16.0wt%.
Refractory carbides, as hard phase, effectively improves intensity and the hardness of matrix.The content of the refractory carbides of Steel Bond Hard Alloy provided by the invention is 1.5wt%～6.0wt%, is preferably 3.0wt%～6.0wt%.Above-mentioned refractory carbides is preferably WC, TiC, VC, NbC, Cr
3c
2with one or more in SiC, more preferably WC, TiC or NbC.
WS
2add in alloy as anti-friction composition, make alloy have lower frictional coefficient, alloy, with the friction of the macromolecular material antithesis such as urethane the time, shows good self lubricity.WS in Steel Bond Hard Alloy provided by the invention
2content be 3.0wt%～6.0wt%, be preferably 3.0wt%～5.0wt%.
The invention provides a kind of Steel Bond Hard Alloy, added refractory carbides in alloy, it improves intensity and the hardness of Steel Bond Hard Alloy effectively as the hard phase of Steel Bond Hard Alloy; WS
2add in alloy as anti-friction composition, reduced the frictional coefficient of alloy, make alloy there is good self lubricity; Carbon is the element that enlarges the γ phase region, and its solid solution solution strengthening effect in iron forms carbide with ferro element simultaneously, improves intensity and the hardness of matrix; Chromium is the element that dwindles the γ phase region of Fe, and forms continuous solid solution with Fe, also can form intermetallic compound σ phase (FeCr) and multiple carbide, improves intensity and the hardness of matrix.Added the compositions such as refractory carbides, tungsten disulfide, carbon and chromium in Steel Bond Hard Alloy of the present invention, improved intensity and the hardness of matrix, made Steel Bond Hard Alloy there is good wear resistance.
The present invention also provides a kind of preparation method of Steel Bond Hard Alloy, comprises the following steps:
A) raw material of following composition is mixed, obtain mixed powder: the refractory carbides powder of 1.5wt%～6.0wt%, the curing tungsten powder of 1.0wt%～3.0wt%, the carbon dust of 1.0wt%～3.0wt%, the manganese powder of 0.1wt%～0.5wt%, the chromium powder of 10.0wt%～18.0wt%, the molybdenum powder of 1.0wt%～5.0wt%, be greater than zero and be less than or equal to the silica flour of 1.8wt%, be greater than zero and be less than or equal to the nickel powder of 5.0wt%, surplus is iron powder;
B) by described mixed powder extrusion forming, obtain the Steel Bond Hard Alloy base substrate;
C), by described Steel Bond Hard Alloy blank sintering, sintering temperature is 1130 ℃～1310 ℃;
D) by step c) the Steel Bond Hard Alloy base substrate that obtains carries out quench treatment and temper, obtains Steel Bond Hard Alloy.
Step is a) process that raw material is mixed, and in order to make various raw materials, fully mixes, and the time of above-mentioned mixing is preferably 60min～180min.The present invention is not particularly limited the mode of described mixing, can be the methods well known in the art such as ball milling mixing.In order to make matrix there is evenly tiny tissue, as optimal way, the granularity of described iron powder is 100 orders～200 orders, the granularity of described carbon dust is 300 orders～400 orders, the granularity of described refractory carbides powder is 300 orders～600 orders, and the granularity of described manganese powder, chromium powder, molybdenum powder, silica flour and nickel powder is respectively 200 orders～300 orders.As preferred version, the present invention has also added the releasing agent of 5wt%～8wt% in raw material, makes mixed powder be easy to moulding in pressure process, does not cause the infringement to mould while making the base substrate break away from moulds simultaneously.
After above-mentioned raw materials is mixed, subsequently by described mixed powder extrusion forming, in order to carry out subsequent operations.Step b) be the process of mixed powder pressurization, pressure is preferably 700MPa～900MPa, more preferably 800MPa.Mode for pressurization can be selected mode well known to those skilled in the art, as mixed powder is placed in to steel die, pressurizes, and obtains the base substrate of moulding.Test result shows, after pressurization, the density of Steel Bond Hard Alloy base substrate is 6.5g/cm
3～7.0g/cm
3.
In order to make Steel Bond Hard Alloy there is higher intensity and hardness, described Steel Bond Hard Alloy base substrate need to be carried out to sintering and thermal treatment.Step c) be the operation of Steel Bond Hard Alloy blank sintering, oxidized in sintering process in order to prevent base substrate, described Steel Bond Hard Alloy base substrate preferably is placed in to the vacuum sintering.It is 1130 ℃～1310 ℃ that the temperature of described sintering is controlled, if sintering temperature is too high, the blank deformation amount is excessive, and can't carry out following process, if sintering temperature is too low, the density of base substrate is not high, and can affect intensity and the hardness of base substrate.Test result shows, after sintering, the density of Steel Bond Hard Alloy base substrate is 6.8g/cm
3～7.2g/cm
3.
Finally the Steel Bond Hard Alloy base substrate after sintering is heat-treated, its matrix is undergone phase transition, be conducive to obtain homogeneous microstructure tiny, the better Steel Bond Hard Alloy of wear resistance.Steps d) be the heat treated process of Steel Bond Hard Alloy base substrate after sintering, described thermal treatment comprises quench treatment and temper, and the temperature of described quench treatment is preferably 800 ℃～1100 ℃, and the temperature of described temper is preferably 200 ℃～600 ℃.Steel Bond Hard Alloy after described sintering has obtained the Steel Bond Hard Alloy of homogeneous microstructure after heat-treating, intensity and hardness all are improved, and has obtained over-all properties metallic substance preferably.The cooling link of above-mentioned quench treatment, can be water-cooled or oil cooling, and to this present invention, there is no particular restriction.The cooling link of same above-mentioned temper, can be by base substrate cool to room temperature in process furnace, or cooling in air, and this present invention is not particularly limited.
The present invention, in preparing the process of Steel Bond Hard Alloy, has obtained Steel Bond Hard Alloy after powder metallurgy sintered operation and heat treatment step.In powder metallurgy sintered process, fine hard particles is dispersed in matrix, contributes to improve intensity and the hardness of matrix; Thermal treatment has subsequently realized martensitic transformation, has improved the hardenability of body material simultaneously, has obtained the matrix of homogeneous microstructure, has improved intensity, hardness and the wear resistance of Steel Bond Hard Alloy.Steel Bond Hard Alloy of the present invention is applied to the stir shaft wear-resistant sleeve of engineering pumping machine, during by the friction of itself and polyurethane high molecule material antithesis, has good self-lubricating property, has improved the wear resistance of wear-resistant sleeve, has extended its work-ing life.
In order further to understand the present invention, below in conjunction with embodiment, Steel Bond Hard Alloy provided by the invention is described in detail, protection scope of the present invention is not limited by the following examples.
Embodiment 1
(1) by the carbon dust of 1.5wt%, the silica flour of 0.8wt%, the manganese powder of 0.25wt%, the chromium powder of 13.0wt%, the molybdenum powder of 1.0wt%, the nickel powder of 0.5wt%, the tungsten carbide powder of 3.0wt%, the curing tungsten powder of 3.0wt% and the iron powder of surplus mix, and obtain mixed powder;
(2) mixed powder step (1) obtained applies the pressure of 800MPa, obtains base substrate;
(3) base substrate step (2) obtained is sintering in a vacuum, and sintering temperature is 1180 ℃;
(4) base substrate step (3) obtained carries out quench treatment, and quenching temperature is 1000 ℃, carries out temper after quenching, and tempering temperature is 200 ℃, obtains Steel Bond Hard Alloy.
The Steel Bond Hard Alloy of preparation is according to the method described above carried out to performance test, and result is referring to table 1.
Embodiment 2
(1) by the carbon dust of 1.5wt%, the silica flour of 0.8wt%, the manganese powder of 0.25wt%, the chromium powder of 13.0wt%, the molybdenum powder of 1.0wt%, the nickel powder of 0.5wt%, the carbonized titanium powder of 3.0wt%, the curing tungsten powder of 2.0wt% and the iron powder of surplus mix, and obtain mixed powder;
(2) mixed powder step (1) obtained applies the pressure of 900MPa, obtains base substrate;
(3) base substrate step (2) obtained is sintering in a vacuum, and sintering temperature is 1310 ℃;
(4) base substrate step (3) obtained carries out quench treatment, and quenching temperature is 800 ℃, carries out temper after quenching, and tempering temperature is 200 ℃, obtains Steel Bond Hard Alloy.
The Steel Bond Hard Alloy of preparation is according to the method described above carried out to performance test, and result is referring to table 1.
Embodiment 3
(1) by the carbon dust of 1.5wt%, the silica flour of 0.8wt%, the manganese powder of 0.25wt%, the chromium powder of 13.0wt%, the molybdenum powder of 1.0wt%, the nickel powder of 1.5wt%, the carbonized titanium powder of 1.5wt%, the curing tungsten powder of 3.0wt% and the iron powder of surplus mix, and obtain mixed powder;
(2) mixed powder step (1) obtained applies the pressure of 700MPa, obtains base substrate;
(3) base substrate step (2) obtained is sintering in a vacuum, and sintering temperature is 1200 ℃;
(4) base substrate step (3) obtained carries out quench treatment, and quenching temperature is 900 ℃, carries out temper after quenching, and tempering temperature is 400 ℃, obtains Steel Bond Hard Alloy.
The Steel Bond Hard Alloy of preparation is according to the method described above carried out to performance test, and result is referring to table 1.
Embodiment 4
(1) by the carbon dust of 3.0wt%, the silica flour of 0.8wt%, the manganese powder of 0.50wt%, the chromium powder of 13.0wt%, the molybdenum powder of 3.0wt%, the nickel powder of 2.5wt%, the tungsten carbide powder of 4.0wt%, the curing tungsten powder of 2.0wt% and the iron powder of surplus mix, and obtain mixed powder;
(2) mixed powder step (1) obtained applies the pressure of 850MPa, obtains base substrate;
(3) base substrate step (2) obtained is sintering in a vacuum, and sintering temperature is 1250 ℃;
(4) base substrate step (3) obtained carries out quench treatment, and quenching temperature is 1100 ℃, carries out temper after quenching, and tempering temperature is 600 ℃, obtains Steel Bond Hard Alloy.
The Steel Bond Hard Alloy of preparation is according to the method described above carried out to performance test, and result is referring to table 1.
Embodiment 5
(1) by the carbon dust of 1.5wt%, the silica flour of 1.8wt%, the manganese powder of 0.25wt%, the chromium powder of 13.0wt%, the molybdenum powder of 3.0wt%, the nickel powder of 0.5wt%, the niobium carbide powder of 5.0wt%, the curing tungsten powder of 1.5wt% and the iron powder of surplus mix, and obtain mixed powder;
(2) mixed powder step (1) obtained applies the pressure of 750MPa, obtains base substrate;
(3) base substrate step (2) obtained is sintering in a vacuum, and sintering temperature is 1250 ℃;
(4) base substrate step (3) obtained carries out quench treatment, and quenching temperature is 950 ℃, carries out temper after quenching, and tempering temperature is 600 ℃, obtains Steel Bond Hard Alloy.
The Steel Bond Hard Alloy of preparation is according to the method described above carried out to performance test, and result is referring to table 1.
Embodiment 6
(1) by the carbon dust of 1.2wt%, the silica flour of 0.8wt%, the manganese powder of 0.25wt%, the chromium powder of 16.0wt%, the molybdenum powder of 1.0wt%, the nickel powder of 0.5wt%, the tungsten carbide powder of 2.5wt%, the curing tungsten powder of 3.0wt% and the iron powder of surplus mix, and obtain mixed powder;
(2) mixed powder step (1) obtained applies the pressure of 750MPa, obtains base substrate;
(3) base substrate step (2) obtained is sintering in a vacuum, and sintering temperature is 1200 ℃;
(4) base substrate step (3) obtained carries out quench treatment, and quenching temperature is 900 ℃, carries out temper after quenching, and tempering temperature is 500 ℃, obtains Steel Bond Hard Alloy.
The Steel Bond Hard Alloy of preparation is according to the method described above carried out to performance test, and result is referring to table 1.
Embodiment 7
(1) by the carbon dust of 1.5wt%, the silica flour of 1.0wt%, the manganese powder of 0.25wt%, the chromium powder of 14.0wt%, the molybdenum powder of 1.0wt%, the nickel powder of 0.5wt%, the tungsten carbide powder of 3.0wt%, the curing tungsten powder of 3.0wt% and the iron powder of surplus mix, and obtain mixed powder;
(2) mixed powder step (1) obtained applies the pressure of 790MPa, obtains base substrate;
(3) base substrate step (2) obtained is sintering in a vacuum, and sintering temperature is 1300 ℃;
(4) base substrate step (3) obtained carries out quench treatment, and quenching temperature is 1000 ℃, carries out temper after quenching, and tempering temperature is 500 ℃, obtains Steel Bond Hard Alloy.
The Steel Bond Hard Alloy of preparation is according to the method described above carried out to performance test, and result is referring to table 1.
Steel Bond Hard Alloy the performance test results prepared by table 1 embodiment
As shown in Table 1, Steel Bond Hard Alloy provided by the invention has higher hardness, intensity and impelling strength, is applicable to the stir shaft wear-resistant sleeve.The hardness of Steel Bond Hard Alloy of the present invention is 45HRC～65HRC, and tensile strength is 150kg/mm
2～180kg/mm
2, tensile strength is higher than 300kg/mm
2, impelling strength is 0.6kg/cm
2～0.9kg/cm
2.
The explanation of above embodiment is just for helping to understand method of the present invention and core concept thereof.It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection domain of the claims in the present invention.
To the above-mentioned explanation of the disclosed embodiments, make professional and technical personnel in the field can realize or use the present invention.Multiple modification to these embodiment will be apparent for those skilled in the art, and General Principle as defined herein can be in the situation that do not break away from the spirit or scope of the present invention, realization in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (2)
1. a Steel Bond Hard Alloy, is characterized in that, composed of the following components:
The refractory carbides of 1.5wt%～6.0wt%;
The WS of 1.0wt%～3.0wt%
2;
The C of 1.0wt%～3.0wt%;
The Mn of 0.1wt%～0.5wt%;
The Cr of 10.0wt%～18.0wt%;
The Mo of 1.0wt%～5.0wt%;
Be greater than zero and be less than or equal to the Si of 1.8wt%;
Be greater than zero and be less than or equal to the Ni of 5.0wt%;
Surplus is iron;
Described refractory carbides is WC, TiC, VC, NbC, Cr
3c
2with one or more in SiC.
2. the preparation method of a Steel Bond Hard Alloy, is characterized in that, comprises the following steps:
A) raw material of following composition is mixed, obtain mixed powder: the refractory carbides powder of 1.5wt%～6.0wt%, the curing tungsten powder of 1.0wt%～3.0wt%, the carbon dust of 1.0wt%～3.0wt%, the manganese powder of 0.1wt%～0.5wt%, the chromium powder of 10.0wt%～18.0wt%, the molybdenum powder of 1.0wt%～5.0wt%, be greater than zero and be less than or equal to the silica flour of 1.8wt%, be greater than zero and be less than or equal to the nickel powder of 5.0wt%, surplus is iron powder; Described refractory carbides powder is WC powder, TiC powder, VC powder, NbC powder, Cr
3c
2one or more in powder and SiC powder;
B) by described mixed powder extrusion forming, obtain the Steel Bond Hard Alloy base substrate;
C), by described Steel Bond Hard Alloy blank sintering, sintering temperature is 1130 ℃～1310 ℃;
D) Steel Bond Hard Alloy base substrate step c) obtained carries out quench treatment and temper, obtains Steel Bond Hard Alloy;
The granularity of described iron powder is 100 orders～200 orders, and the granularity of described carbon dust is 300 orders～400 orders, and the granularity of described refractory carbides powder is 300 orders～600 orders, and the granularity of described manganese powder, chromium powder, molybdenum powder, silica flour and nickel powder is respectively 200 orders～300 orders;
The mixing time of mixing described in step a) is 60min～180min;
The pressure pressurizeed described in step b) is 700MPa～900MPa;
Sintering described in step c) carries out in a vacuum;
The temperature of quench treatment described in step d) is 800 ℃～1100 ℃; The temperature of described temper is 200 ℃～600 ℃.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101463452A (en) * | 2007-12-18 | 2009-06-24 | 中国科学院兰州化学物理研究所 | Iron based high temperature self-lubricating composite material and its preparation |
| CN102230119A (en) * | 2011-06-23 | 2011-11-02 | 株洲硬质合金集团有限公司 | TiC system steel-bonded carbide and preparation method thereof |
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