CN105154787B - A kind of high vanadium antifriction alloy roller tooth and preparation method thereof - Google Patents
A kind of high vanadium antifriction alloy roller tooth and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a kind of high vanadium antifriction alloy roller tooth, described high vanadium antifriction alloy roller tooth is made up of high vanadium wear-resisting alloy steel, the component of described high vanadium wear-resisting alloy steel (following % all represents percentage by weight) count by weight percentage 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 less than 0.035%, and surplus is ferrum and inevitable impurity thereof.Present invention additionally comprises the preparation method of a kind of high vanadium antifriction alloy roller tooth, roller tooth after machine-shaping is used the pre-heat treatment → quenching → tempering → cooling process → bead → sprayed wc coating, under certain cost control, wearability and the intensity of roll-type lithotrite roller tooth can be greatly improved, strengthen toughness and the corrosion resistance of roller tooth, extend the service life of roller tooth further.
Description
Technical field
The present invention relates to a kind of mining machinery, particularly a kind of roll-type lithotrite roller tooth and preparation method thereof.
Background technology
The roller tooth major part of the most domestic disintegrating machine roll uses potassium steel material, and this roller tooth matrix is Ovshinsky
Body, Toughness Ratio is preferable, it is believed that generation is processed hardening phenomenon at heavily stressed percussion lower roll tooth surface so that
Case hardness strengthens.But in actual operation application, when the suffered at work impact stress of roller tooth is little, high-manganese steel
Matter processing hardening phenomenon is inconspicuous, and surface layer does not have the sclerocortex that hardness is bigger.Shown by a large amount of materials when roller tooth is started working
Micro-cutting, under the biggest heavily stressed impact, produces again impact dent.Two kinds of common effects of abrasion so that potassium steel roller tooth
Premature wear lost efficacy, service life is short.
High vanadium wear resistant alloy material has developed 10 years the most has a surplus, and it has excellent wearability, good matrix group
Knitting, excellent mechanical performance, therefore as a new generation's high-abrasive material, high vanadium antifriction alloy the most all receives much concern, in state
In, high vanadium wear resistant alloy material is in development, exploitation and the starting stage of production application, has been used for roll, tup, ball
In the multiple wearing piece such as lining board of grinder and rotor block, but range of application is the least, and in order to improve the wearability of roll, roll becomes
Divide and gradually develop to high-carbon height vanadium direction, and nowadays, V-Ti is described as third generation vanadium alloy, the most preferably applies vanadium
Titanium alloy is also the direction that scientific research personnel studies always.
Summary of the invention
The goal of the invention of the present invention is: for the problem of above-mentioned existence, it is provided that a kind of high vanadium antifriction alloy roller tooth, one
Under fixed cost control, wearability and the intensity of roll-type lithotrite roller tooth is greatly improved, strengthens toughness and the corrosion resistance of roller tooth,
Extend the service life of roller tooth further.
The technical solution used in the present invention is as follows: a kind of high vanadium antifriction alloy roller tooth, described high vanadium antifriction alloy roller tooth by
High vanadium wear-resisting alloy steel is made, and (following % all represents weight hundred to the component of described high vanadium wear-resisting alloy steel count by weight percentage
Proportion by subtraction) be: carbon is 1.5 ~ 2.0%, and chromium is 4.0 ~ 6.0%, and manganese is 0.12 ~ 0.2%, and vanadium is 13.0 ~ 15.0%, and titanium is 0.8 ~ 2.2%,
Molybdenum is 1.3 ~ 2.5%, and nickel is 2.3 ~ 3.1%, and silicon is 0.2 ~ 0.4%, and rare earth is 0.56 ~ 1.73%, and the total amount of p and s is less than
0.035%, surplus is ferrum and inevitable impurity thereof.
Further, preparation method based on above-mentioned a kind of high vanadium antifriction alloy roller tooth, comprise the following steps:
Step 1, the pre-heat treatment: the machining high vanadium antifriction alloy roller tooth after good is put in heating furnace and preheats, heating
Temperature to 400 DEG C, and it is incubated 1h, heating rate is not more than 20 DEG C/s, is then heated to 650 DEG C, is incubated 2h, and heating rate is not
More than 30 DEG C/s, then being warming up to 900 DEG C, heating rate controls at 70 DEG C/min, is incubated 40min, and then water-cooled is to 650 DEG C, protects
Temperature 4h, air cooling is to room temperature the most again；
Step 2, quenching: after the pre-heat treatment, high vanadium antifriction alloy roller tooth is put into and in heat-treatment furnace, is heated to 1000
DEG C, heating rate is more than 100 DEG C/s, is incubated 2 ~ 3min, is then pre-chilled to 850 DEG C, then oil is cooled 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 antifriction alloy roller tooth, is incubated 2h, then
Air cooling is to room temperature.
Further, high vanadium antifriction alloy roller tooth heat treatment be also performed to after completing cooling process, will heat treatment complete after
High vanadium antifriction alloy roller tooth puts into deep cooling extremely-40 ~-60 DEG C in household freezer, freezing 4 ~ 5h, and cooling is carried out at shot-peening after being disposed
Reason.
Further, shot-peening granularity used by described bead is 30 mesh, and material is ceramic pellet, and the shot-peening time is 20min, by force
Degree is 0.6A, and described high vanadium antifriction alloy roller tooth surface is also coated with one layer of tungsten carbide coating, i.e. sprays at high vanadium antifriction alloy roller tooth
After ball has processed, in its thermal spraying on surface tungsten carbide-base coating, coating layer thickness is 0.12 ~ 0.18mm.
Present invention additionally comprises the preparation method of a kind of high vanadium antifriction alloy roller tooth, comprise the following steps:
Step 1, the pre-heat treatment: the machining high vanadium antifriction alloy roller tooth after good is put in heating furnace and preheats, heating
Temperature to 400 DEG C, and it is incubated 1h, heating rate is not more than 20 DEG C/s, is then heated to 650 DEG C, is incubated 2h, and heating rate is not
More than 30 DEG C/s, then being warming up to 900 DEG C, heating rate controls at 70 DEG C/min, is incubated 40min, and then water-cooled is to 650 DEG C, protects
Temperature 4h, air cooling is to room temperature the most again；
Step 2, quenching: after the pre-heat treatment, high vanadium antifriction alloy roller tooth is put into and in heat-treatment furnace, is heated to 1000
DEG C, heating rate is more than 100 DEG C/s, is incubated 2 ~ 3min, is then pre-chilled to 850 DEG C, then oil is cooled 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 antifriction alloy roller tooth, is incubated 2h, then
Air cooling is to room temperature.
Step 4, cooling process and bead: the heat treatment high vanadium antifriction alloy roller tooth after complete is put in household freezer deep
Being cooled to-40 ~-60 DEG C, freezing 4 ~ 5h, cooling carries out bead after being disposed.
Further, the high vanadium antifriction alloy roller that preparation method based on above-mentioned a kind of high vanadium antifriction alloy roller tooth prepares
Tooth, its component (following % all represents percentage by weight) count by weight percentage is: carbon is 1.8%, and chromium is 5.2%, and manganese is
0.16%, silicon is 0.27%, and nickel is 2.7%, and vanadium is 13.6%, and titanium is 1.5%, and molybdenum is 1.8%, and rare earth is 1.35%, always containing of sulfur and phosphorus
Amount is less than 0.035%, and surplus is ferrum and inevitable impurity.
In sum, owing to have employed technique scheme, the invention has the beneficial effects as follows:
1, impact flexibility is high, and the resistivity of roller tooth impact loading strengthens.
In the high vanadium antifriction alloy roller tooth of the present invention, the addition of vanadium reaches 13.0 ~ 15.0%, and vanadium can refine in steel
Tissue crystal grain, improves intensity and toughness, makes the intensity of steel alloy and the intensity of Toughness Ratio not vanadium steel and toughness bring up to
Another step, by measuring with Charpy impact machine tester, its toughness can reach 15.3J/cm2, and for the high chromium casting of roller tooth
The impact flexibility of ferrum is generally 7.8J/cm2, toughness is almost doubled, and therefore the resistivity of roller tooth impact loading is big
Width strengthens, and roller tooth is not easily broken.
2, roller tooth hardness improves, and wearability is more excellent.
Metallographic group by the high vanadium antifriction alloy roller tooth with metallurgical microscope and the sem observation present invention
Knitting, its organizational composition is carbide (predominantly vanadium carbide)+martensite, additionally possibly together with minimal amount of retained austenite, can neglect
Slightly disregarding, the tiny vanadium carbide Dispersed precipitate of spherical or almost spherical is on matrix, and martensite is distributed the most in the form of sheets；Vanadium carbide is
High rigidity carbide, can be greatly improved the hardness of high vanadium alloy, and due to the existence of lamellar martensite, matrix cracking tendency is little,
There is preferable scratch resistance capability, effectively protection can be provided for carbide, reduce plow and fatigue-exfoliative wearing rate, extend roller tooth
Service life；Process further, since have employed cooling, the retained austenite in matrix can be completely converted into sheet as far as possible
Shape martensite, decreases the retained austenite impact on roller tooth wearability, further enhances the wearability of roller tooth, by with Lip river
Formula durometer and dynamic load impact determination of wear testing machine, the hardness of the high vanadium alloy roller tooth of the present invention is up to 66.5HRC, Gao Meng
After steel hardness uses under conditions of working condition is suitable up to 45HRC(, the hardness on potassium steel surface), compared with potassium steel
Relative wear resistance is 10.113, and the hardness of roller tooth is greatly improved, and wearability is also greatly enhanced, and the service life of roller tooth is mutually the most deserved
Arrive prolongation.
3, Technology for Heating Processing is simple, and the roller tooth combination property obtained is more preferable.
By roller tooth being carried out the pre-heat treatment → quenching → tempering → cooling process → bead, on roller tooth not only has
State the wearability of excellence, high rigidity, high-strength tenacity, high intensity, due also to roller tooth exists a number of nickel, chromium element, make
Roller tooth also has good corrosion resistance, particularly increases the effect of element titanium newly, can make the dense internal organization of roller tooth, refinement crystalline substance
Grain, reduces aging sensitivity and cold brittleness, improving welding property, can avoid intercrystalline corrosion；And the rare earth element added, Ke Yigai
Become the composition of field trash, form, distribution and character in roller tooth, thus improve the toughness of roller tooth, weldability, cold-forming property,
Improve wearability further；By roller tooth being carried out bead, improving the fatigue resistance of roller tooth surface, being allowed to be difficult to be ground
Damage.In order to improve the wearability of roller tooth further and fill up the pit stayed at roller tooth surface because of bead, on its surface
Also thermal jet scribbles tungsten carbide-base coating, makes roller tooth surface smooth, and wearability is higher, extends the service life of roller tooth further, is
5 ~ 7 times of the service life of existing potassium steel roller tooth.
Detailed description of the invention
Following non-limiting examples is used for the present invention is described.
Embodiment one
A kind of high vanadium antifriction alloy roller tooth, is made up of high vanadium wear-resisting alloy steel, and its smelting process is as follows: (1) is by raw material ferrum
Put into and converter adds heat fusing, after raw material ferrum all melts, regulate bath temperature, make bath temperature control on 1550 DEG C of left sides
The right side, then adds decarburizer, desulfurizing agent, deoxidizer in molten bath, the molten iron in molten bath is carried out decarburization, desulfurization, deoxidation；(2)
After decarburization, desulfurization, deoxidation terminate, intensification bath temperature, make up to about 1600 DEG C, keep 5min, then in molten bath, even
Continuous addition high carbon ferro-chrome, ferromanganese, molybdenum-iron and nickel shot, make the chromium content in molten bath, Fe content, molybdenum content and nickel content reach predetermined
Requirement, regulates temperature, makes temperature control at about 1550 DEG C, keeps 5min；(3) in molten bath, raw material vanadium iron and ferrotianium are added again
And continuously add decarburizer and carry out decarburization, after ferrum has melted, raise bath temperature, make temperature control at 1550 DEG C, keep
2min, adds dehydrogenating agent, denitrifier, decarburizer, desulfurizing agent, deoxidizer, is now finely adjusted alloying component, makes up to pre-
Determine component requirements；(4) when carbon content reaches 1.5 %, add the crome metal in ferrosilicon and aluminium reducing molten bath and end in molten bath
Deoxidation, and control the content of silicon and aluminum, making up to predetermined component requirements, vacuum heat-preserving 7min, smelting terminates, the most backward ladle
The rare earth of middle addition specified amount, the mass percent of above-mentioned chemical analysis controls as follows: carbon is 1.5%, and chromium is 6.0%, and manganese is
0.2%, silicon is 0.4%, and nickel is 2.3%, and vanadium is 15.0%, and titanium is 0.8%, and molybdenum is 2.5%, and rare earth is 1.73%, sulfur and the total content of phosphorus
Less than 0.035%, surplus is ferrum and inevitable impurity；(5) ladle after smelting carries out cast molding, tapping temperature
Controlling at 1500 DEG C, pouring temperature controls, at 1450 DEG C, to forge processing again, become roller by lathe process the most again after cast molding
Tooth.
After high vanadium antifriction alloy roller tooth machine-shaping, it is carried out heat treatment, the steps include:
Step 1, the pre-heat treatment: the machining high vanadium antifriction alloy roller tooth after good is put in heating furnace and preheats, heating
Temperature to 400 DEG C, and it is incubated 1h, heating rate is not more than 20 DEG C/s, is then heated to 650 DEG C, is incubated 2h, and heating rate is not
More than 30 DEG C/s, then being warming up to 900 DEG C, heating rate controls at 70 DEG C/min, is incubated 40min, and then water-cooled is to 650 DEG C, protects
Temperature 4h, air cooling is to room temperature the most again；
Step 2, quenching: after the pre-heat treatment, high vanadium antifriction alloy roller tooth is put into and in heat-treatment furnace, is heated to 1000
DEG C, heating rate is more than 100 DEG C/s, is incubated 2min, is then pre-chilled to 850 DEG C, then oil is cooled to 200 DEG C, is incubated 30min, finally
Air cooling is to room temperature；
Step 3, tempering: after having quenched, be heated to 210 DEG C of tempering by high vanadium antifriction alloy roller tooth, is incubated 2h, then air cooling
To room temperature.
High vanadium antifriction alloy roller tooth heat treatment be also performed to after completing cooling process, will heat treatment complete after high vanadium wear-resisting
Alloy roller tooth puts into deep cooling extremely-40 DEG C in household freezer, freezing 4h.
High vanadium antifriction alloy roller is laughed somebody to scorn after being but disposed and is also performed to bead, and used by bead, shot-peening granularity is
30 mesh, material is ceramic pellet, and the shot-peening time is 20min, and intensity is 0.6A.
High vanadium antifriction alloy roller tooth surface is also coated with one layer of tungsten carbide coating, i.e. in high vanadium antifriction alloy roller tooth bead
After completing, in its thermal spraying on surface tungsten carbide-base coating, coating layer thickness is 0.12mm.
In the final high vanadium antifriction alloy roller tooth prepared, matrix is isolated little, favorably by spherical or almost spherical vanadium carbide
In toughness and the wearability of raising material, its hardness reaches 66.5HRC, and toughness reaches 15.3J/cm2, and its wearability is potassium steel
10 times, and the lamellar martensite generated, make matrix cracking tendency little, have preferable scratch resistance capability, can provide for carbide
Effectively protection, reduces plow and fatigue-exfoliative wearing rate, extends the service life of roller tooth, and its service life is the 5 ~ 7 of potassium steel
Times, process further, since have employed cooling, the retained austenite in matrix can be completely converted into lamellar geneva as far as possible
Body, decreases the retained austenite impact on roller tooth wearability, further enhances the wearability of roller tooth.
Embodiment two
A kind of high vanadium antifriction alloy roller tooth, is made up of high vanadium wear-resisting alloy steel, and its smelting process is as follows: (1) is by raw material ferrum
Put into and converter adds heat fusing, after raw material ferrum all melts, regulate bath temperature, make bath temperature control on 1550 DEG C of left sides
The right side, then adds decarburizer, desulfurizing agent, deoxidizer in molten bath, the molten iron in molten bath is carried out decarburization, desulfurization, deoxidation；(2)
After decarburization, desulfurization, deoxidation terminate, intensification bath temperature, make up to about 1600 DEG C, keep 5min, then in molten bath, even
Continuous addition high carbon ferro-chrome, ferromanganese, molybdenum-iron and nickel shot, make the chromium content in molten bath, Fe content, molybdenum content and nickel content reach predetermined
Requirement, regulates temperature, makes temperature control at about 1550 DEG C, keeps 5min；(3) in molten bath, raw material vanadium iron and ferrotianium are added again
And continuously add decarburizer and carry out decarburization, after ferrum has melted, raise bath temperature, make temperature control at 1550 DEG C, keep
2min, adds dehydrogenating agent, denitrifier, decarburizer, desulfurizing agent, deoxidizer, is now finely adjusted alloying component, makes up to pre-
Determine component requirements；(4) when carbon content reaches 1.5 %, add the crome metal in ferrosilicon and aluminium reducing molten bath and end in molten bath
Deoxidation, and control the content of silicon and aluminum, making up to predetermined component requirements, vacuum heat-preserving 7min, smelting terminates, the most backward ladle
The rare earth of middle addition specified amount, the mass percent of above-mentioned chemical analysis controls as follows: carbon is 2.0%, and chromium is 4.0%, and manganese is
0.12%, silicon is 0.2%, and nickel is 3.1%, and vanadium is 13.0%, and titanium is 2.2%, and molybdenum is 1.3%, and rare earth is 0.56%, always containing of sulfur and phosphorus
Amount is less than 0.035%, and surplus is ferrum and inevitable impurity；(5) ladle after smelting carries out cast molding, goes out furnace temperature
Degree controls at 1500 DEG C, and pouring temperature controls, at 1450 DEG C, to forge processing again, become by lathe process after cast molding
Roller tooth.
After high vanadium antifriction alloy roller tooth machine-shaping, it is carried out heat treatment, the steps include:
Step 1, the pre-heat treatment: the machining high vanadium antifriction alloy roller tooth after good is put in heating furnace and preheats, heating
Temperature to 400 DEG C, and it is incubated 1h, heating rate is not more than 20 DEG C/s, is then heated to 650 DEG C, is incubated 2h, and heating rate is not
More than 30 DEG C/s, then being warming up to 900 DEG C, heating rate controls at 70 DEG C/min, is incubated 40min, and then water-cooled is to 650 DEG C, protects
Temperature 4h, air cooling is to room temperature the most again；
Step 2, quenching: after the pre-heat treatment, high vanadium antifriction alloy roller tooth is put into and in heat-treatment furnace, is heated to 1000
DEG C, heating rate is more than 100 DEG C/s, is incubated 3min, is then pre-chilled to 850 DEG C, then oil is cooled to 250 DEG C, is incubated 30min, finally
Air cooling is to room temperature；
Step 3, tempering: after having quenched, be heated to 230 DEG C of tempering by high vanadium antifriction alloy roller tooth, is incubated 2h, then air cooling
To room temperature.
High vanadium antifriction alloy roller tooth heat treatment be also performed to after completing cooling process, will heat treatment complete after high vanadium wear-resisting
Alloy roller tooth puts into deep cooling extremely-60 DEG C in household freezer, freezing 5h.
High vanadium antifriction alloy roller is laughed somebody to scorn after being but disposed and is also performed to bead, and used by bead, shot-peening granularity is
30 mesh, material is ceramic pellet, and the shot-peening time is 20min, and intensity is 0.6A.
High vanadium antifriction alloy roller tooth surface is also coated with one layer of tungsten carbide coating, i.e. in high vanadium antifriction alloy roller tooth bead
After completing, in its thermal spraying on surface tungsten carbide-base coating, coating layer thickness is 0.18mm.
In the final high vanadium antifriction alloy roller tooth prepared, matrix is isolated little, favorably by spherical or almost spherical vanadium carbide
In toughness and the wearability of raising material, its hardness reaches 66.5HRC, and toughness reaches 15.3J/cm2, and its wearability is potassium steel
10 times, and the lamellar martensite generated, make matrix cracking tendency little, have preferable scratch resistance capability, can provide for carbide
Effectively protection, reduces plow and fatigue-exfoliative wearing rate, extends the service life of roller tooth, and its service life is the 5 ~ 7 of potassium steel
Times, process further, since have employed cooling, the retained austenite in matrix can be completely converted into lamellar geneva as far as possible
Body, decreases the retained austenite impact on roller tooth wearability, further enhances the wearability of roller tooth.
Embodiment three
A kind of high vanadium antifriction alloy roller tooth, is made up of high vanadium wear-resisting alloy steel, and its smelting process is as follows: (1) is by raw material ferrum
Put into and converter adds heat fusing, after raw material ferrum all melts, regulate bath temperature, make bath temperature control on 1550 DEG C of left sides
The right side, then adds decarburizer, desulfurizing agent, deoxidizer in molten bath, the molten iron in molten bath is carried out decarburization, desulfurization, deoxidation；(2)
After decarburization, desulfurization, deoxidation terminate, intensification bath temperature, make up to about 1600 DEG C, keep 5min, then in molten bath, even
Continuous addition high carbon ferro-chrome, ferromanganese, molybdenum-iron and nickel shot, make the chromium content in molten bath, Fe content, molybdenum content and nickel content reach predetermined
Requirement, regulates temperature, makes temperature control at about 1550 DEG C, keeps 5min；(3) in molten bath, raw material vanadium iron and ferrotianium are added again
And continuously add decarburizer and carry out decarburization, after ferrum has melted, raise bath temperature, make temperature control at 1550 DEG C, keep
2min, adds dehydrogenating agent, denitrifier, decarburizer, desulfurizing agent, deoxidizer, is now finely adjusted alloying component, makes up to pre-
Determine component requirements；(4) when carbon content reaches 1.5 %, add the crome metal in ferrosilicon and aluminium reducing molten bath and end in molten bath
Deoxidation, and control the content of silicon and aluminum, making up to predetermined component requirements, vacuum heat-preserving 7min, smelting terminates, the most backward ladle
The rare earth of middle addition specified amount, the mass percent of above-mentioned chemical analysis controls as follows: carbon is 1.8%, and chromium is 5.2%, and manganese is
0.16%, silicon is 0.27%, and nickel is 2.7%, and vanadium is 13.6%, and titanium is 1.5%, and molybdenum is 1.8%, and rare earth is 1.35%, always containing of sulfur and phosphorus
Amount is less than 0.035%, and surplus is ferrum and inevitable impurity；(5) ladle after smelting carries out cast molding, goes out furnace temperature
Degree controls at 1500 DEG C, and pouring temperature controls, at 1450 DEG C, to forge processing again, become by lathe process after cast molding
Roller tooth.
After high vanadium antifriction alloy roller tooth machine-shaping, it is carried out heat treatment, the steps include:
Step 1, the pre-heat treatment: the machining high vanadium antifriction alloy roller tooth after good is put in heating furnace and preheats, heating
Temperature to 400 DEG C, and it is incubated 1h, heating rate is not more than 20 DEG C/s, is then heated to 650 DEG C, is incubated 2h, and heating rate is not
More than 30 DEG C/s, then being warming up to 900 DEG C, heating rate controls at 70 DEG C/min, is incubated 40min, and then water-cooled is to 650 DEG C, protects
Temperature 4h, air cooling is to room temperature the most again；
Step 2, quenching: after the pre-heat treatment, high vanadium antifriction alloy roller tooth is put into and in heat-treatment furnace, is heated to 1000
DEG C, heating rate is more than 100 DEG C/s, is incubated 2.5min, is then pre-chilled to 850 DEG C, then oil is cooled to 230 DEG C, is incubated 30min,
Rear air cooling is to room temperature；
Step 3, tempering: after having quenched, be heated to 215 DEG C of tempering by high vanadium antifriction alloy roller tooth, is incubated 2h, then air cooling
To room temperature.
High vanadium antifriction alloy roller tooth heat treatment be also performed to after completing cooling process, will heat treatment complete after high vanadium wear-resisting
Alloy roller tooth puts into deep cooling extremely-52 DEG C in household freezer, freezing 4.5h.
High vanadium antifriction alloy roller is laughed somebody to scorn after being but disposed and is also performed to bead, and used by bead, shot-peening granularity is
30 mesh, material is ceramic pellet, and the shot-peening time is 20min, and intensity is 0.6A.
High vanadium antifriction alloy roller tooth surface is also coated with one layer of tungsten carbide coating, i.e. in high vanadium antifriction alloy roller tooth bead
After completing, in its thermal spraying on surface tungsten carbide-base coating, coating layer thickness is 0.15mm.
In the final high vanadium antifriction alloy roller tooth prepared, matrix is isolated little, favorably by spherical or almost spherical vanadium carbide
In toughness and the wearability of raising material, its hardness reaches 66.5HRC, and toughness reaches 15.3J/cm2, and its wearability is potassium steel
10 times, and the lamellar martensite generated, make matrix cracking tendency little, have preferable scratch resistance capability, can provide for carbide
Effectively protection, reduces plow and fatigue-exfoliative wearing rate, extends the service life of roller tooth, and its service life is the 5 ~ 7 of potassium steel
Times, process further, since have employed cooling, the retained austenite in matrix can be completely converted into lamellar geneva as far as possible
Body, decreases the retained austenite impact on roller tooth wearability, further enhances the wearability of roller tooth.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all essences in the present invention
Any amendment, equivalent and the improvement etc. made within god and principle, should be included within the scope of the present invention.
Claims (5)
1. a high vanadium antifriction alloy roller tooth, described high vanadium antifriction alloy roller tooth is made up of high vanadium wear-resisting alloy steel, and its feature exists
In, the component of described high vanadium wear-resisting alloy steel (following % all represents percentage by weight) count by weight percentage is: carbon is 1.5 ~
2.0%, chromium is 4.0 ~ 6.0%, and manganese is 0.12 ~ 0.2%, and vanadium is 13.0 ~ 15.0%, and titanium is 0.8 ~ 2.2%, and molybdenum is 1.3 ~ 2.5%, and nickel is
2.3 ~ 3.1%, silicon is 0.2 ~ 0.4%, and rare earth is 0.56 ~ 1.73%, the total amount of p and s be less than 0.035%, surplus be ferrum and
Inevitably impurity, the preparation method of described high vanadium antifriction alloy roller tooth comprises the following steps:
Step 1, the pre-heat treatment: the machining high vanadium antifriction alloy roller tooth after good is put in heating furnace and preheats, heating-up temperature
To 400 DEG C, and being incubated 1h, heating rate is not more than 20 DEG C/s, is then heated to 650 DEG C, is incubated 2h, and heating rate is not more than
30 DEG C/s, then it is warming up to 900 DEG C, heating rate controls at 70 DEG C/min, is incubated 40min, and then water-cooled is to 650 DEG C, is incubated 4h,
Air cooling is to room temperature the most again；
Step 2, quenching: after the pre-heat treatment, put into by high vanadium antifriction alloy roller tooth and be heated to 1000 DEG C in heat-treatment furnace, rise
Temperature speed, more than 100 DEG C/s, is incubated 2 ~ 3min, is then pre-chilled to 850 DEG C, then oil is cooled to 200 ~ 250 DEG C, is incubated 30min, finally
Air cooling is to room temperature；
Step 3, tempering: after having quenched, be heated to 210 ~ 230 DEG C of tempering by high vanadium antifriction alloy roller tooth, is incubated 2h, then air cooling
To room temperature.
A kind of high vanadium antifriction alloy roller tooth the most as claimed in claim 1, it is characterised in that high vanadium antifriction alloy roller tooth heat treatment
Be also performed to cooling after completing process, will heat treatment complete after high vanadium antifriction alloy roller tooth put in household freezer deep cooling to-40
~-60 DEG C, freezing 4 ~ 5h, cooling carries out bead after being disposed.
The preparation method of a kind of high vanadium antifriction alloy roller tooth the most as claimed in claim 2, it is characterised in that described bead
Shot-peening granularity used is 30 mesh, and material is ceramic pellet, and the shot-peening time is 20min, and intensity is 0.6A, described high vanadium antifriction alloy roller
Tooth surface is also coated with one layer of tungsten carbide coating, i.e. after high vanadium antifriction alloy roller tooth bead completes, at its thermal spraying on surface
Tungsten carbide-base coating, coating layer thickness is 0.12 ~ 0.18mm.
4. the preparation method of one kind high vanadium antifriction alloy roller tooth, it is characterised in that comprise the following steps:
Step 1, the pre-heat treatment: the machining high vanadium antifriction alloy roller tooth after good is put in heating furnace and preheats, heating-up temperature
To 400 DEG C, and being incubated 1h, heating rate is not more than 20 DEG C/s, is then heated to 650 DEG C, is incubated 2h, and heating rate is not more than
30 DEG C/s, then it is warming up to 900 DEG C, heating rate controls at 70 DEG C/min, is incubated 40min, and then water-cooled is to 650 DEG C, is incubated 4h,
Air cooling is to room temperature the most again；
Step 2, quenching: after the pre-heat treatment, put into by high vanadium antifriction alloy roller tooth and be heated to 1000 DEG C in heat-treatment furnace, rise
Temperature speed, more than 100 DEG C/s, is incubated 2 ~ 3min, is then pre-chilled to 850 DEG C, then oil is cooled to 200 ~ 250 DEG C, is incubated 30min, finally
Air cooling is to room temperature；
Step 3, tempering: after having quenched, be heated to 210 ~ 230 DEG C of tempering by high vanadium antifriction alloy roller tooth, is incubated 2h, then air cooling
To room temperature；
Step 4, cooling process and bead: the heat treatment high vanadium antifriction alloy roller tooth after complete is put into deep cooling in household freezer
To-40 ~-60 DEG C, freezing 4 ~ 5h, cooling carries out bead after being disposed.
5. the high vanadium antifriction alloy roller that preparation method based on a kind of high vanadium antifriction alloy roller tooth described in claim 4 prepares
Tooth, it is characterised in that its component (following % all represents percentage by weight) count by weight percentage is: carbon is 1.8%, and chromium is
5.2%, manganese is 0.16%, and silicon is 0.27%, and nickel is 2.7%, and vanadium is 13.6%, and titanium is 1.5%, and molybdenum is 1.8%, and rare earth is 1.35%, sulfur
Being less than 0.035% with the total content of phosphorus, surplus is ferrum and inevitable impurity.
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| 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 |
| 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 |
| 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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| JPS59215417A (en) * | 1983-05-20 | 1984-12-05 | Daido Steel Co Ltd | Heat treatment of worked article of high speed tool steel |
| US5679908A (en) * | 1995-11-08 | 1997-10-21 | Crucible Materials Corporation | Corrosion resistant, high vanadium, powder metallurgy tool steel articles with improved metal to metal wear resistance and a method for producing the same |
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