CN105154787A - High-vanadium wear-resistant alloy roller gear and preparation method thereof - Google Patents
High-vanadium wear-resistant alloy roller gear and preparation method thereof Download PDFInfo
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- CN105154787A CN105154787A CN201510689143.2A CN201510689143A CN105154787A CN 105154787 A CN105154787 A CN 105154787A CN 201510689143 A CN201510689143 A CN 201510689143A CN 105154787 A CN105154787 A CN 105154787A
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Abstract
The invention discloses a high-vanadium wear-resistant alloy roller gear which is prepared from high-vanadium wear-resistant alloy steel. The high-vanadium wear-resistant alloy steel comprises the following components in percentage by weight: 1.5-2.0% of carbon, 4.0-6.0% of chromium, 0.12-0.2% of manganese, 13.0-15.0% of vanadium, 0.8-2.2% of titanium, 1.3-2.5% of molybdenum, 2.3-3.1% of nickel, 0.2-0.4% of silicon, 0.56-1.73% of rare earth, not more than 0.035% of phosphorus and sulfur, and the balance of iron and inevitable impurities. The invention also discloses a preparation method of the high-vanadium wear-resistant alloy roller gear, which comprises the following steps: carrying out preheating treatment on a machined roller gear, quenching, tempering, cooling, carrying out shot blasting, and spraying a tungsten carbide coating. Under certain cost control, the method can greatly enhance the wear resistance and strength of the roller-type rock crusher roller gear, enhance the toughness and corrosion resistance of the roller gear and further prolong the service life of the roller gear.
Description
Technical field
The present invention relates to a kind of mining machinery, particularly a kind of roll-type stoning machine roller tooth and preparation method thereof.
Background technology
The roller tooth major part of crusher roll domestic at present uses high mangaenese steel material, this roller tooth matrix is austenite, Toughness Ratio is better, so it is believed that and will produce work hardening phenomenon at heavily stressed shock action lower roll tooth surface, surface hardness is strengthened.But in the operational applications of reality, when the suffered at work shock stress of roller tooth is little, high mangaenese steel material work hardening phenomenon is not obvious, and upper layer does not have the larger sclerocortex of hardness.By the micro-cutting of a large amount of material when roller tooth is started working, under not too large heavily stressed impact, produce impact dent again.Two kinds of wearing and tearing actings in conjunction, the premature wear of high mangaenese steel roller tooth was lost efficacy, and work-ing life is short.
High vanadium wear resistant alloy material has developed at home has a surplus for 10 years, it has excellent wear resistance, good matrix, excellent mechanical property, therefore as high-abrasive material of new generation, high vanadium wear resistant alloy all receives much concern all the time, at home, high vanadium wear resistant alloy material is in development, the starting stage of development and production application, now be used to roll, tup, in the multiple wearing piece such as ball grinding machine lining board and rotor block, but range of application is still less, in order to improve the wear resistance of roll, roll component is gradually to high-carbon height vanadium future development, and nowadays, V-Ti is described as third generation vanadium alloy, how to apply V-Ti better is also the direction that scientific research personnel studies always.
Summary of the invention
Goal of the invention of the present invention is: for above-mentioned Problems existing, a kind of high vanadium wear resistant alloy roller tooth is provided, under certain cost control, significantly improves wear resistance and the intensity of roll-type stoning machine roller tooth, strengthen toughness and the erosion resistance of roller tooth, extend the work-ing life of roller tooth further.
The technical solution used in the present invention is as follows: a kind of high vanadium wear resistant alloy roller tooth, described high vanadium wear resistant alloy roller tooth is made up of high vanadium wear-resisting alloy steel, components based on weight percentage calculation (following % all represents weight percent) of described high vanadium wear-resisting alloy steel is: carbon is 1.5 ~ 2.0%, chromium is 4.0 ~ 6.0%, manganese is 0.12 ~ 0.2%, vanadium is 13.0 ~ 15.0%, titanium is 0.8 ~ 2.2%, molybdenum is 1.3 ~ 2.5%, nickel is 2.3 ~ 3.1%, and silicon is 0.2 ~ 0.4%, and rare earth is 0.56 ~ 1.73%, the total amount of p and s is no more than 0.035%, and surplus is iron and inevitable impurity thereof.
Further, based on the preparation method of above-mentioned a kind of high vanadium wear resistant alloy roller tooth, comprise the following steps:
Step 1, thermal pretreatment: the high vanadium wear resistant alloy roller tooth after mechanical workout is good puts into process furnace preheating, and Heating temperature to 400 DEG C, and is incubated 1h, temperature rise rate is not more than 20 DEG C/s, and then being heated to 650 DEG C, insulation 2h, temperature rise rate is not more than 30 DEG C/s, be warming up to 900 DEG C again, temperature rise rate controls at 70 DEG C/min, insulation 40min, then water-cooled to 650 DEG C, insulation 4h, and then air cooling is to room temperature;
Step 2, quenching: after thermal pretreatment, high vanadium wear resistant alloy roller tooth is put into heat treatment furnace and is heated to 1000 DEG C, temperature rise rate is greater than 100 DEG C/s, insulation 2 ~ 3min, is then pre-chilled to 850 DEG C, then oil cooling to 200 ~ 250 DEG C, insulation 30min, last air cooling is to room temperature;
Step 3, tempering: after having quenched, be heated to 210 ~ 230 DEG C of tempering by high vanadium wear resistant alloy roller tooth, insulation 2h, then air cooling is to room temperature.
Further, also will carry out cooling process after the thermal treatment of high vanadium wear resistant alloy roller tooth completes, the high vanadium wear resistant alloy roller tooth after complete by thermal treatment puts into refrigerated tank deep cooling to-40 ~-60 DEG C, and freezing 4 ~ 5h, carries out shot peening after cooling process.
Further, described shot peening shot-peening granularity used is 30 orders, material is ceramic pellet, the shot-peening time is 20min, intensity is 0.6A, and described high vanadium wear resistant alloy roller tooth surface also scribbles one deck tungsten carbide coating, namely after high vanadium wear resistant alloy roller tooth shot peening completes, in its thermal spraying on surface tungsten carbide-base coating, coat-thickness is 0.12 ~ 0.18mm.
The present invention also comprises a kind of preparation method of high vanadium wear resistant alloy roller tooth, comprises the following steps:
Step 1, thermal pretreatment: the high vanadium wear resistant alloy roller tooth after mechanical workout is good puts into process furnace preheating, and Heating temperature to 400 DEG C, and is incubated 1h, temperature rise rate is not more than 20 DEG C/s, and then being heated to 650 DEG C, insulation 2h, temperature rise rate is not more than 30 DEG C/s, be warming up to 900 DEG C again, temperature rise rate controls at 70 DEG C/min, insulation 40min, then water-cooled to 650 DEG C, insulation 4h, and then air cooling is to room temperature;
Step 2, quenching: after thermal pretreatment, high vanadium wear resistant alloy roller tooth is put into heat treatment furnace and is heated to 1000 DEG C, temperature rise rate is greater than 100 DEG C/s, insulation 2 ~ 3min, is then pre-chilled to 850 DEG C, then oil cooling to 200 ~ 250 DEG C, insulation 30min, last air cooling is to room temperature;
Step 3, tempering: after having quenched, be heated to 210 ~ 230 DEG C of tempering by high vanadium wear resistant alloy roller tooth, insulation 2h, then air cooling is to room temperature.
Step 4, cooling process and shot peening: the high vanadium wear resistant alloy roller tooth after thermal treatment is complete puts into refrigerated tank deep cooling to-40 ~-60 DEG C, and freezing 4 ~ 5h, carries out shot peening after cooling process.
Further, the high vanadium wear resistant alloy roller tooth that the preparation method based on above-mentioned a kind of high vanadium wear resistant alloy roller tooth obtains, its components based on weight percentage calculation (following % all represents weight percent) is: carbon is 1.8%, chromium is 5.2%, manganese is 0.16%, and silicon is 0.27%, and nickel is 2.7%, vanadium is 13.6%, titanium is 1.5%, and molybdenum is 1.8%, and rare earth is 1.35%, the total content of sulphur and phosphorus is no more than 0.035%, and surplus is iron and inevitable impurity.
In sum, owing to have employed technique scheme, the invention has the beneficial effects as follows:
1, impelling strength is high, and the resistivity of roller tooth impact loading strengthens.
In high vanadium wear resistant alloy roller tooth of the present invention, the addition of vanadium reaches 13.0 ~ 15.0%, vanadium can thinning microstructure crystal grain in steel, improve intensity and toughness, the intensity of vanadium steel and toughness do not bring up to another step to make the intensity of steel alloy and Toughness Ratio, by measuring with Charpy impact machine tester, its toughness can reach 15.3J/cm
2, and be generally 7.8J/cm for the impelling strength of the rich chromium cast iron of roller tooth
2, toughness is almost doubled, and therefore the resistivity of roller tooth impact loading significantly strengthens, roller tooth not frangibility.
2, roller tooth hardness improves, and wear resistance is more excellent.
By the metallographic structure with metaloscope and sem observation high vanadium wear resistant alloy roller tooth of the present invention, its organizational composition is carbide (being mainly vanadium carbide)+martensite, residual austenite in addition also containing minute quantity, can ignore, the tiny vanadium carbide Dispersed precipitate of spherical or almost spherical is on matrix, and martensite then distributes in the form of sheets, vanadium carbide is high rigidity carbide, significantly can improve the hardness of high vanadium alloy, and due to the existence of plate martensite, matrix cracking tendency is little, has good scratch resistance capability, can provide available protecting for carbide, reduce plow and fatigue-exfoliative wearing rate, extend the work-ing life of roller tooth, in addition, owing to have employed cooling process, residual austenite in matrix as much as possible all can be converted into plate martensite, decrease the impact of residual austenite pair roller tooth wear resistance, further enhance the wear resistance of roller tooth, by with Rockwell Hardness meter and dynamic load impact determination of wear testing machine, the hardness of high vanadium alloy roller tooth of the present invention can reach 66.5HRC, high mangaenese steel hardness can reach after 45HRC(uses under the condition that working condition is suitable, the hardness on high mangaenese steel surface), relative wear resistance compared with high mangaenese steel is 10.113, the hardness of roller tooth significantly improves, wear resistance also strengthens greatly, the work-ing life of roller tooth is also corresponding obtains prolongation.
3, thermal treatment process is simple, and the roller tooth over-all properties obtained is better.
Thermal pretreatment → quenching → tempering → cooling process → shot peening is carried out by pair roller tooth, roller tooth not only has wear resistance, high rigidity, high-strong toughness, the high strength of above-mentioned excellence, also owing to there is nickel, the chromium element of some amount in roller tooth, make roller tooth also have good erosion resistance, particularly the effect of newly-increased element titanium, can make the dense internal organization of roller tooth, crystal grain thinning, reduce aging sensitivity and cold shortness, improving welding property, can avoid intergranular corrosion; And the rare earth element added, the composition of inclusion in roller tooth, form, distribution and character can be changed, thus improve toughness, the weldability of roller tooth, cold-forming property, improve wear resistance further; Carry out shot peening by pair roller tooth, improve the fatigue resistance of roller tooth surface, make it not easily to be worn.In order to improve the wear resistance of roller tooth further and fill up because of shot peening at the pit that roller tooth surface stays, on its surface, also thermospray has tungsten carbide-base coating, make roller tooth surface smooth, wear resistance is higher, the work-ing life of further prolongation roller tooth is 5 ~ 7 times of the work-ing life of existing high mangaenese steel roller tooth.
Embodiment
Following non-limiting examples is for illustration of the present invention.
embodiment one
A kind of high vanadium wear resistant alloy roller tooth, be made up of high vanadium wear-resisting alloy steel, its smelting technology is as follows: raw material iron is put into converter heat fused by (1), after raw material iron all melts, regulate bath temperature, make bath temperature control at about 1550 DEG C, then in molten bath, decarburizer is added, sweetening agent, reductor, carries out decarburization, desulfurization, deoxidation to the molten iron in molten bath, (2) after decarburization, desulfurization, deoxidation terminate, intensification bath temperature, make it to reach about 1600 DEG C, keep 5min, then in molten bath, add high carbon ferro-chrome, ferromanganese, molybdenum-iron and nickel shot continuously, the chromium content in molten bath, Fe content, molybdenum content and nickel content is made to reach pre-provisioning request, regulate temperature, make temperature control at about 1550 DEG C, keep 5min, (3) in molten bath, add raw material vanadium iron and ferrotianium again and continue to add decarburizer and carry out decarburization, after iron has melted, raise bath temperature, made temperature control at 1550 DEG C, keep 2min, add dehydrogenating agent, denitrfying agent, decarburizer, sweetening agent, reductor, now alloy composition is finely tuned, and makes it to reach predetermined component requirements, (4) when carbon content reaches 1.5%, the chromium metal in ferrosilicon and aluminium reducing molten bath and final deoxygenation is added in molten bath, and control the content of Silicified breccias, make it to reach predetermined component requirements, vacuum heat-preserving 7min, smelt and terminate, the rare earth of specified amount is added in the most backward ladle, the mass percent of above-mentioned Chemical Composition controls as follows: carbon is 1.5%, chromium is 6.0%, manganese is 0.2%, silicon is 0.4%, nickel is 2.3%, vanadium is 15.0%, titanium is 0.8%, molybdenum is 2.5%, rare earth is 1.73%, the total content of sulphur and phosphorus is no more than 0.035%, surplus is iron and inevitable impurity, (5) ladle after smelting carries out cast molding, and tapping temperature controls at 1500 DEG C, and teeming temperature controls, at 1450 DEG C, to forge processing again after cast molding, finally becomes roller tooth by machined into again.
After the machine-shaping of high vanadium wear resistant alloy roller tooth, it is heat-treated, the steps include:
Step 1, thermal pretreatment: the high vanadium wear resistant alloy roller tooth after mechanical workout is good puts into process furnace preheating, and Heating temperature to 400 DEG C, and is incubated 1h, temperature rise rate is not more than 20 DEG C/s, and then being heated to 650 DEG C, insulation 2h, temperature rise rate is not more than 30 DEG C/s, be warming up to 900 DEG C again, temperature rise rate controls at 70 DEG C/min, insulation 40min, then water-cooled to 650 DEG C, insulation 4h, and then air cooling is to room temperature;
Step 2, quenching: after thermal pretreatment, high vanadium wear resistant alloy roller tooth is put into heat treatment furnace and is heated to 1000 DEG C, temperature rise rate is greater than 100 DEG C/s, insulation 2min, is then pre-chilled to 850 DEG C, then oil cooling to 200 DEG C, insulation 30min, and last air cooling is to room temperature;
Step 3, tempering: after having quenched, be heated to 210 DEG C of tempering by high vanadium wear resistant alloy roller tooth, insulation 2h, then air cooling is to room temperature.
Also will carry out cooling process after the thermal treatment of high vanadium wear resistant alloy roller tooth completes, the high vanadium wear resistant alloy roller tooth after complete by thermal treatment puts into refrigerated tank deep cooling to-40 DEG C, freezing 4h.
High vanadium wear resistant alloy roller also will carry out shot peening after laughing somebody to scorn and being but disposed, and shot peening shot-peening granularity used is 30 orders, and material is ceramic pellet, and the shot-peening time is 20min, and intensity is 0.6A.
High vanadium wear resistant alloy roller tooth surface also scribbles one deck tungsten carbide coating, and namely after high vanadium wear resistant alloy roller tooth shot peening completes, in its thermal spraying on surface tungsten carbide-base coating, coat-thickness is 0.12mm.
In final obtained high vanadium wear resistant alloy roller tooth, vanadium carbide that is spherical or almost spherical isolates little to matrix, be conducive to the toughness and the wear resistance that improve material, its hardness reaches 66.5HRC, toughness reaches 15.3J/cm2, its wear resistance is 10 times of high mangaenese steel, and the plate martensite generated, matrix cracking is inclined to little, there is good scratch resistance capability, available protecting can be provided for carbide, reduce plow and fatigue-exfoliative wearing rate, extend the work-ing life of roller tooth, its work-ing life is 5 ~ 7 times of high mangaenese steel, in addition, owing to have employed cooling process, residual austenite in matrix as much as possible all can be converted into plate martensite, decrease the impact of residual austenite pair roller tooth wear resistance, further enhance the wear resistance of roller tooth.
embodiment two
A kind of high vanadium wear resistant alloy roller tooth, be made up of high vanadium wear-resisting alloy steel, its smelting technology is as follows: raw material iron is put into converter heat fused by (1), after raw material iron all melts, regulate bath temperature, make bath temperature control at about 1550 DEG C, then in molten bath, decarburizer is added, sweetening agent, reductor, carries out decarburization, desulfurization, deoxidation to the molten iron in molten bath, (2) after decarburization, desulfurization, deoxidation terminate, intensification bath temperature, make it to reach about 1600 DEG C, keep 5min, then in molten bath, add high carbon ferro-chrome, ferromanganese, molybdenum-iron and nickel shot continuously, the chromium content in molten bath, Fe content, molybdenum content and nickel content is made to reach pre-provisioning request, regulate temperature, make temperature control at about 1550 DEG C, keep 5min, (3) in molten bath, add raw material vanadium iron and ferrotianium again and continue to add decarburizer and carry out decarburization, after iron has melted, raise bath temperature, made temperature control at 1550 DEG C, keep 2min, add dehydrogenating agent, denitrfying agent, decarburizer, sweetening agent, reductor, now alloy composition is finely tuned, and makes it to reach predetermined component requirements, (4) when carbon content reaches 1.5%, the chromium metal in ferrosilicon and aluminium reducing molten bath and final deoxygenation is added in molten bath, and control the content of Silicified breccias, make it to reach predetermined component requirements, vacuum heat-preserving 7min, smelt and terminate, the rare earth of specified amount is added in the most backward ladle, the mass percent of above-mentioned Chemical Composition controls as follows: carbon is 2.0%, chromium is 4.0%, manganese is 0.12%, silicon is 0.2%, nickel is 3.1%, vanadium is 13.0%, titanium is 2.2%, molybdenum is 1.3%, rare earth is 0.56%, the total content of sulphur and phosphorus is no more than 0.035%, surplus is iron and inevitable impurity, (5) ladle after smelting carries out cast molding, and tapping temperature controls at 1500 DEG C, and teeming temperature controls, at 1450 DEG C, to forge processing again after cast molding, finally becomes roller tooth by machined into again.
After the machine-shaping of high vanadium wear resistant alloy roller tooth, it is heat-treated, the steps include:
Step 1, thermal pretreatment: the high vanadium wear resistant alloy roller tooth after mechanical workout is good puts into process furnace preheating, and Heating temperature to 400 DEG C, and is incubated 1h, temperature rise rate is not more than 20 DEG C/s, and then being heated to 650 DEG C, insulation 2h, temperature rise rate is not more than 30 DEG C/s, be warming up to 900 DEG C again, temperature rise rate controls at 70 DEG C/min, insulation 40min, then water-cooled to 650 DEG C, insulation 4h, and then air cooling is to room temperature;
Step 2, quenching: after thermal pretreatment, high vanadium wear resistant alloy roller tooth is put into heat treatment furnace and is heated to 1000 DEG C, temperature rise rate is greater than 100 DEG C/s, insulation 3min, is then pre-chilled to 850 DEG C, then oil cooling to 250 DEG C, insulation 30min, and last air cooling is to room temperature;
Step 3, tempering: after having quenched, be heated to 230 DEG C of tempering by high vanadium wear resistant alloy roller tooth, insulation 2h, then air cooling is to room temperature.
Also will carry out cooling process after the thermal treatment of high vanadium wear resistant alloy roller tooth completes, the high vanadium wear resistant alloy roller tooth after complete by thermal treatment puts into refrigerated tank deep cooling to-60 DEG C, freezing 5h.
High vanadium wear resistant alloy roller also will carry out shot peening after laughing somebody to scorn and being but disposed, and shot peening shot-peening granularity used is 30 orders, and material is ceramic pellet, and the shot-peening time is 20min, and intensity is 0.6A.
High vanadium wear resistant alloy roller tooth surface also scribbles one deck tungsten carbide coating, and namely after high vanadium wear resistant alloy roller tooth shot peening completes, in its thermal spraying on surface tungsten carbide-base coating, coat-thickness is 0.18mm.
In final obtained high vanadium wear resistant alloy roller tooth, vanadium carbide that is spherical or almost spherical isolates little to matrix, be conducive to the toughness and the wear resistance that improve material, its hardness reaches 66.5HRC, toughness reaches 15.3J/cm2, its wear resistance is 10 times of high mangaenese steel, and the plate martensite generated, matrix cracking is inclined to little, there is good scratch resistance capability, available protecting can be provided for carbide, reduce plow and fatigue-exfoliative wearing rate, extend the work-ing life of roller tooth, its work-ing life is 5 ~ 7 times of high mangaenese steel, in addition, owing to have employed cooling process, residual austenite in matrix as much as possible all can be converted into plate martensite, decrease the impact of residual austenite pair roller tooth wear resistance, further enhance the wear resistance of roller tooth.
embodiment three
A kind of high vanadium wear resistant alloy roller tooth, be made up of high vanadium wear-resisting alloy steel, its smelting technology is as follows: raw material iron is put into converter heat fused by (1), after raw material iron all melts, regulate bath temperature, make bath temperature control at about 1550 DEG C, then in molten bath, decarburizer is added, sweetening agent, reductor, carries out decarburization, desulfurization, deoxidation to the molten iron in molten bath, (2) after decarburization, desulfurization, deoxidation terminate, intensification bath temperature, make it to reach about 1600 DEG C, keep 5min, then in molten bath, add high carbon ferro-chrome, ferromanganese, molybdenum-iron and nickel shot continuously, the chromium content in molten bath, Fe content, molybdenum content and nickel content is made to reach pre-provisioning request, regulate temperature, make temperature control at about 1550 DEG C, keep 5min, (3) in molten bath, add raw material vanadium iron and ferrotianium again and continue to add decarburizer and carry out decarburization, after iron has melted, raise bath temperature, made temperature control at 1550 DEG C, keep 2min, add dehydrogenating agent, denitrfying agent, decarburizer, sweetening agent, reductor, now alloy composition is finely tuned, and makes it to reach predetermined component requirements, (4) when carbon content reaches 1.5%, the chromium metal in ferrosilicon and aluminium reducing molten bath and final deoxygenation is added in molten bath, and control the content of Silicified breccias, make it to reach predetermined component requirements, vacuum heat-preserving 7min, smelt and terminate, the rare earth of specified amount is added in the most backward ladle, the mass percent of above-mentioned Chemical Composition controls as follows: carbon is 1.8%, chromium is 5.2%, manganese is 0.16%, silicon is 0.27%, nickel is 2.7%, vanadium is 13.6%, titanium is 1.5%, molybdenum is 1.8%, rare earth is 1.35%, the total content of sulphur and phosphorus is no more than 0.035%, surplus is iron and inevitable impurity, (5) ladle after smelting carries out cast molding, and tapping temperature controls at 1500 DEG C, and teeming temperature controls, at 1450 DEG C, to forge processing again after cast molding, finally becomes roller tooth by machined into again.
After the machine-shaping of high vanadium wear resistant alloy roller tooth, it is heat-treated, the steps include:
Step 1, thermal pretreatment: the high vanadium wear resistant alloy roller tooth after mechanical workout is good puts into process furnace preheating, and Heating temperature to 400 DEG C, and is incubated 1h, temperature rise rate is not more than 20 DEG C/s, and then being heated to 650 DEG C, insulation 2h, temperature rise rate is not more than 30 DEG C/s, be warming up to 900 DEG C again, temperature rise rate controls at 70 DEG C/min, insulation 40min, then water-cooled to 650 DEG C, insulation 4h, and then air cooling is to room temperature;
Step 2, quenching: after thermal pretreatment, high vanadium wear resistant alloy roller tooth is put into heat treatment furnace and is heated to 1000 DEG C, temperature rise rate is greater than 100 DEG C/s, insulation 2.5min, is then pre-chilled to 850 DEG C, then oil cooling to 230 DEG C, insulation 30min, last air cooling is to room temperature;
Step 3, tempering: after having quenched, be heated to 215 DEG C of tempering by high vanadium wear resistant alloy roller tooth, insulation 2h, then air cooling is to room temperature.
Also will carry out cooling process after the thermal treatment of high vanadium wear resistant alloy roller tooth completes, the high vanadium wear resistant alloy roller tooth after complete by thermal treatment puts into refrigerated tank deep cooling to-52 DEG C, freezing 4.5h.
High vanadium wear resistant alloy roller also will carry out shot peening after laughing somebody to scorn and being but disposed, and shot peening shot-peening granularity used is 30 orders, and material is ceramic pellet, and the shot-peening time is 20min, and intensity is 0.6A.
High vanadium wear resistant alloy roller tooth surface also scribbles one deck tungsten carbide coating, and namely after high vanadium wear resistant alloy roller tooth shot peening completes, in its thermal spraying on surface tungsten carbide-base coating, coat-thickness is 0.15mm.
In final obtained high vanadium wear resistant alloy roller tooth, vanadium carbide that is spherical or almost spherical isolates little to matrix, be conducive to the toughness and the wear resistance that improve material, its hardness reaches 66.5HRC, toughness reaches 15.3J/cm2, its wear resistance is 10 times of high mangaenese steel, and the plate martensite generated, matrix cracking is inclined to little, there is good scratch resistance capability, available protecting can be provided for carbide, reduce plow and fatigue-exfoliative wearing rate, extend the work-ing life of roller tooth, its work-ing life is 5 ~ 7 times of high mangaenese steel, in addition, owing to have employed cooling process, residual austenite in matrix as much as possible all can be converted into plate martensite, decrease the impact of residual austenite pair roller tooth wear resistance, further enhance the wear resistance of roller tooth.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. one kind high vanadium wear resistant alloy roller tooth, described high vanadium wear resistant alloy roller tooth is made up of high vanadium wear-resisting alloy steel, components based on weight percentage calculation (following % all represents weight percent) of described high vanadium wear-resisting alloy steel is: carbon is 1.5 ~ 2.0%, chromium is 4.0 ~ 6.0%, manganese is 0.12 ~ 0.2%, vanadium is 13.0 ~ 15.0%, titanium is 0.8 ~ 2.2%, molybdenum is 1.3 ~ 2.5%, nickel is 2.3 ~ 3.1%, and silicon is 0.2 ~ 0.4%, and rare earth is 0.56 ~ 1.73%, the total amount of p and s is no more than 0.035%, and surplus is iron and inevitable impurity thereof.
2., based on the preparation method of a kind of high vanadium wear resistant alloy roller tooth according to claim 1, it is characterized in that, comprise the following steps:
Step 1, thermal pretreatment: the high vanadium wear resistant alloy roller tooth after mechanical workout is good puts into process furnace preheating, and Heating temperature to 400 DEG C, and is incubated 1h, temperature rise rate is not more than 20 DEG C/s, and then being heated to 650 DEG C, insulation 2h, temperature rise rate is not more than 30 DEG C/s, be warming up to 900 DEG C again, temperature rise rate controls at 70 DEG C/min, insulation 40min, then water-cooled to 650 DEG C, insulation 4h, and then air cooling is to room temperature;
Step 2, quenching: after thermal pretreatment, high vanadium wear resistant alloy roller tooth is put into heat treatment furnace and is heated to 1000 DEG C, temperature rise rate is greater than 100 DEG C/s, insulation 2 ~ 3min, is then pre-chilled to 850 DEG C, then oil cooling to 200 ~ 250 DEG C, insulation 30min, last air cooling is to room temperature;
Step 3, tempering: after having quenched, be heated to 210 ~ 230 DEG C of tempering by high vanadium wear resistant alloy roller tooth, insulation 2h, then air cooling is to room temperature.
3. the preparation method of a kind of high vanadium wear resistant alloy roller tooth as claimed in claim 2, it is characterized in that, also cooling process will be carried out after the thermal treatment of high vanadium wear resistant alloy roller tooth completes, high vanadium wear resistant alloy roller tooth after complete by thermal treatment puts into refrigerated tank deep cooling to-40 ~-60 DEG C, freezing 4 ~ 5h, carries out shot peening after cooling process.
4. the preparation method of a kind of high vanadium wear resistant alloy roller tooth as claimed in claim 3, it is characterized in that, described shot peening shot-peening granularity used is 30 orders, material is ceramic pellet, and the shot-peening time is 20min, and intensity is 0.6A, described high vanadium wear resistant alloy roller tooth surface also scribbles one deck tungsten carbide coating, namely, after high vanadium wear resistant alloy roller tooth shot peening completes, in its thermal spraying on surface tungsten carbide-base coating, coat-thickness is 0.12 ~ 0.18mm.
5. a preparation method for high vanadium wear resistant alloy roller tooth, is characterized in that, comprise the following steps:
Step 1, thermal pretreatment: the high vanadium wear resistant alloy roller tooth after mechanical workout is good puts into process furnace preheating, and Heating temperature to 400 DEG C, and is incubated 1h, temperature rise rate is not more than 20 DEG C/s, and then being heated to 650 DEG C, insulation 2h, temperature rise rate is not more than 30 DEG C/s, be warming up to 900 DEG C again, temperature rise rate controls at 70 DEG C/min, insulation 40min, then water-cooled to 650 DEG C, insulation 4h, and then air cooling is to room temperature;
Step 2, quenching: after thermal pretreatment, high vanadium wear resistant alloy roller tooth is put into heat treatment furnace and is heated to 1000 DEG C, temperature rise rate is greater than 100 DEG C/s, insulation 2 ~ 3min, is then pre-chilled to 850 DEG C, then oil cooling to 200 ~ 250 DEG C, insulation 30min, last air cooling is to room temperature;
Step 3, tempering: after having quenched, be heated to 210 ~ 230 DEG C of tempering by high vanadium wear resistant alloy roller tooth, insulation 2h, then air cooling is to room temperature;
Step 4, cooling process and shot peening: the high vanadium wear resistant alloy roller tooth after thermal treatment is complete puts into refrigerated tank deep cooling to-40 ~-60 DEG C, and freezing 4 ~ 5h, carries out shot peening after cooling process.
6. based on the high vanadium wear resistant alloy roller tooth that the preparation method of a kind of high vanadium wear resistant alloy roller tooth according to claim 5 obtains, it is characterized in that, its components based on weight percentage calculation (following % all represents weight percent) is: carbon is 1.8%, chromium is 5.2%, manganese is 0.16%, and silicon is 0.27%, and nickel is 2.7%, vanadium is 13.6%, titanium is 1.5%, and molybdenum is 1.8%, and rare earth is 1.35%, the total content of sulphur and phosphorus is no more than 0.035%, and surplus is iron and inevitable impurity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510689143.2A CN105154787B (en) | 2015-10-23 | 2015-10-23 | A kind of high vanadium antifriction alloy roller tooth and preparation method thereof |
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| CN105648156A (en) * | 2016-04-07 | 2016-06-08 | 乐山天华机械制造有限公司 | Method for heat treatment of chrome molybdenum vanadium steel |
| CN106048174A (en) * | 2016-07-20 | 2016-10-26 | 柳州科尔特锻造机械有限公司 | Heat treatment method for high-strength alloy steel |
| CN106636956A (en) * | 2016-12-22 | 2017-05-10 | 苏州劲元油压机械有限公司 | High-strength anti-wearing hydraulic oil cylinder body |
| CN107715987A (en) * | 2017-09-28 | 2018-02-23 | 刘军 | A kind of breaker roll roller tooth of biomass fuel crusher and preparation method thereof |
| RU2665643C1 (en) * | 2018-03-02 | 2018-09-03 | Юлия Алексеевна Щепочкина | Iron-based alloy |
| CN114472856A (en) * | 2022-04-14 | 2022-05-13 | 唐山贵金甲科技有限公司 | Roller tooth sleeve of steel slag treatment crushing roller press and production process |
| CN114635089A (en) * | 2022-03-22 | 2022-06-17 | 河北恒韧增材制造有限公司 | Easily-processed high-strength high-toughness high-wear-resistance nitride alloy roller |
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| CN107715987A (en) * | 2017-09-28 | 2018-02-23 | 刘军 | A kind of breaker roll roller tooth of biomass fuel crusher and preparation method thereof |
| RU2665643C1 (en) * | 2018-03-02 | 2018-09-03 | Юлия Алексеевна Щепочкина | Iron-based alloy |
| CN114635089A (en) * | 2022-03-22 | 2022-06-17 | 河北恒韧增材制造有限公司 | Easily-processed high-strength high-toughness high-wear-resistance nitride alloy roller |
| CN114472856A (en) * | 2022-04-14 | 2022-05-13 | 唐山贵金甲科技有限公司 | Roller tooth sleeve of steel slag treatment crushing roller press and production process |
| CN114472856B (en) * | 2022-04-14 | 2022-06-28 | 唐山贵金甲科技有限公司 | Roller tooth sleeve of steel slag treatment crushing roller press and production process |
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