CN109468541A - A kind of rail traffic high-precision bearing processing technology - Google Patents
A kind of rail traffic high-precision bearing processing technology Download PDFInfo
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- CN109468541A CN109468541A CN201811370878.9A CN201811370878A CN109468541A CN 109468541 A CN109468541 A CN 109468541A CN 201811370878 A CN201811370878 A CN 201811370878A CN 109468541 A CN109468541 A CN 109468541A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/003—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass bearings
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
- C21D1/32—Soft annealing, e.g. spheroidising
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/56—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering characterised by the quenching agents
- C21D1/60—Aqueous agents
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/40—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for rings; for bearing races
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
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- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
- Rolling Contact Bearings (AREA)
Abstract
The invention discloses a kind of rail traffic high-precision bearing processing technologys, including 1) embryo material is chosen；(2) primary blank is handled；(3) grain size is examined；(4) sawing；(5) it is heat-treated；6) grinding is handled；7) spray-on coating.Processing technology of the present invention is easy to produce in enormous quantities, raw material prepares rationally science, the bearings synthesis prepared using processing technology of the present invention is functional, there is good machinability, and wear-resisting property and contact fatigue strength are high, hot-working character is good, it is uniform to improve performances, surfacing, the surface hardnesses such as high rigidity, wear-resistant, the anticorrosive and high-precision of bearing, quality is stablized, be easy to promote on a large scale etc..
Description
Technical field
The present invention relates to technical field of bearing processing, in particular to a kind of rail traffic high-precision bearing processing technology.
Background technique
Bearing is the important foundation components of all kinds of mechanized equipments, with the ten big industry development plans that country puts into effect, respectively
Demand of each industry of row to bearing also incrementally increases.Bearing is that fixed and reduction load coefficient of friction is played in mechanical transmission course
Component.It may also be said that when other parts generate relative motion each other on axis, for reducing the friction in power transmission process
The parts that coefficient and holding shaft center are fixed.Bearing is a kind of very important components in contemporary mechanical equipment.It
Major function is to support mechanical rotary body, to reduce mechanical load coefficient of friction of the equipment in transmission process.
Studies in China focuses primarily upon manufacture high added value bearing, reliability, service life including improving bearing at present
And Dn value etc., such as: high added value bearing being manufactured by high speed upsetting, fusion casting prepares blocky high-entropy alloy, thermal spraying
Surface-coating technology, chemical vapor deposition (CVD) and physical vapour deposition (PVD) (PVD) technology etc. improve the antifriction of bearing matrix
Wiping, wear-resistant, bearing capacity and service life.
In order to improve the performance of the metal materials such as bearing, need to be heat-treated workpiece, common heat treatment process has
The heat treatment methods such as quenching, tempering, annealing, normalizing.Wherein, quenching refers to the workpiece for being for example heated to austenitic state to face
Speed more than boundary's cooling velocity is quickly cooled to form the quenching structures such as martensite, and after quenching treatment, workpiece can be improved
Hardness.
Grain size generally refers to the actual die size after austenitizing, i.e. steel are cold after different heat treatment operations
But obtained crystal grain at room temperature is arrived；Crystal grain is smaller, and just the more, the binding force of metal is further strong for crystal boundary.The size of crystal grain is to gold
The mechanical performance of category influences very big.So grain size is to indicate one of significant data of material property.For domestic bearing forging,
Both it requires to obtain accurate size and surface quality, it is specified that the hardness range of forging and micro- in terms of its mechanical property
The grain size of tissue, the size of the grain size foundation critically important as one for the quality judging of carburizing steel bearing forging.It is existing
When processing carburizing steel railway bearing forging for certain enterprises, the requirement of forging grain size is not only defined, and provide simultaneously
Same Part and the differential requirement for being not more than 2 grades of grain size with batch.According to conventional process flow, for each batch
For secondary forging, grain size is differential differential beyond 3 sometimes, and the air-cooled temperature of initial forging temperature, final forging temperature, forging is set
Whether meter is reasonable, whether can the mild uniformly grain size of cooling and raw material is uniformly arrived with batch part exceeded, will affect
To the grain size of final forging.
In view of above, the present invention provides a kind of rail traffic high-precision bearing processing technologys, to solve the prior art
Existing defect.
Summary of the invention
Technical problem to be solved by the present invention lies in: provide a kind of rail traffic high-precision bearing processing technology.
In order to solve the above technical problems, the present invention provides a kind of rail traffic high-precision bearing processing technologys, including
Following steps:
1) embryo material is chosen: embryo material is self-control GCr15 bearing steel, makes the parts by weight difference of each constituent of GCr15 bearing steel by oneself
Are as follows: 100 parts by weight of iron powder, 2 parts by weight of carbon dust, 0.4 parts by weight of titanium valve, 0.9 parts by weight of manganese powder, 0.6 parts by weight of nano-cerium oxide,
0.8 parts by weight of nano chromium oxide, 0.9 parts by weight of nanoparticle active agent, 0.3 parts by weight of molybdenum powder, zirconium powder 0.3-0.5 parts by weight, aluminium powder
12-16 parts by weight, tungsten carbide 0.9-1.1 parts by weight, copper powder 11-13 parts by weight；
2) primary blank handle: to above-mentioned steps 1) in embryo material component carry out forging processing, turnery processing, Milling Process, obtain
To the crude green body of the bearing；
3) grain size is examined: examining the grain size of crude green body, grain size control is 6 grades -8 grades；
4) sawing: crude green body is cut off on sawing machine according to length needed for this that be processed bearing, guarantees the disconnected size of material
Precision obtains the primary blank of the bearing；
5) it is heat-treated: the obtained bearing primary blank is heat-treated, be heat-treated by spheroidizing, quenching and lonneal
A production line continuous production is formed, annealing temperature is 850 DEG C, obtains the bearing crude green body；
Wherein, it is quenched specifically: S1, hardening media is put into salt bath furnace is heated to 600 DEG C, be added into hardening media
Water, agitation obtain quenching liquid so that water is uniformly distributed in hardening media；
S2, the bearing primary blank obtained after step 4) is handled is put into salt bath and is heated, salt bath heating temperature is
1050 DEG C, keep the temperature 2h；
S3, by step S2, treated that primary blank is transferred in heating furnace, and heating furnace is brought rapidly up to 700 DEG C, keeps the temperature 3.5h,
After heating and thermal insulation, quenching treatment 2.5h is carried out using the quenching liquid that step S1 is obtained；
6) grinding is handled: S1, roughly grind by bearing crude green body, grinding parameter are as follows: 150 mesh of wear particle size；Grinding wheel speed
25-30m/s；Workpiece rotational frequency 0.3m/s；Grinding depth < 0.01mm；Movement speed 0.2-0.3m/min, it is longitudinal into mill amount 0.025-
0.05mm；S2, fine grinding, grinding parameter are as follows: 400 mesh of wear particle size are carried out；Grinding wheel speed 25-30m/s；Workpiece rotational frequency 0.5m/
s；Grinding depth < 0.005mm；Movement speed 0.05-0.1m/s, it is longitudinal into mill amount 0.025-0.05mm；
7) spray-on coating: rush-resisting material will be sprayed by the bearing crude green body surface of step 6) grinding processing, obtains high bearing first product；
8) the bearing first product Jing Guo step 7) spray treatment is subjected to surfacing and deburred；
9) it will be put into oil pan and soaked by the bearing first product of step 8) processing, obtain the automobile bearing finished product；
10) finally, whether the obtained bearing completed products of desk checking are qualified, qualified finished product is packed and stored.
Further, the parts by weight for making each constituent of GCr15 bearing steel in step 1) of the present invention by oneself are respectively as follows: iron powder
100 parts by weight, 2 parts by weight of carbon dust, 0.4 parts by weight of titanium valve, 0.9 parts by weight of manganese powder, 0.6 parts by weight of nano-cerium oxide, nano oxygen
Change 0.8 parts by weight of chromium, 0.9 parts by weight of nanoparticle active agent, 0.3 parts by weight of molybdenum powder, 0.3 parts by weight of zirconium powder, 12 parts by weight of aluminium powder, carbon
Change 0.9 parts by weight of tungsten, 11 parts by weight of copper powder.
Further, the parts by weight for making each constituent of GCr15 bearing steel in step 1) of the present invention by oneself are respectively as follows: iron powder
100 parts by weight, 2 parts by weight of carbon dust, 0.4 parts by weight of titanium valve, 0.9 parts by weight of manganese powder, 0.6 parts by weight of nano-cerium oxide, nano oxygen
Change 0.8 parts by weight of chromium, 0.9 parts by weight of nanoparticle active agent, 0.3 parts by weight of molybdenum powder, 0.4 parts by weight of zirconium powder, 14 parts by weight of aluminium powder, carbon
Change 1 parts by weight of tungsten, 12 parts by weight of copper powder.
Further, the parts by weight for making each constituent of GCr15 bearing steel in step 1) of the present invention by oneself are respectively as follows: iron powder
100 parts by weight, 2 parts by weight of carbon dust, 0.4 parts by weight of titanium valve, 0.9 parts by weight of manganese powder, 0.6 parts by weight of nano-cerium oxide, nano oxygen
Change 0.8 parts by weight of chromium, 0.9 parts by weight of nanoparticle active agent, 0.3 parts by weight of molybdenum powder, 0.5 parts by weight of zirconium powder, 16 parts by weight of aluminium powder, carbon
Change 1.1 parts by weight of tungsten, 13 parts by weight of copper powder.
Further, the hardening media in step 5) of the present invention in quenching treatment is sodium nitrate.
Further, tempering in step 5) of the present invention is air-cooled to after tempering heat preservation 5h in 175 DEG C of tempering furnace
Room temperature, wherein tempering 5 times.
Further, step 6) grinding processing of the present invention: S1, bearing crude green body roughly grind, grinding parameter are as follows:
150 mesh of wear particle size；Grinding wheel speed 27m/s；Workpiece rotational frequency 0.3m/s；Grinding depth < 0.01mm；Movement speed 0.25m/min,
Longitudinally into mill amount 0.035mm；S2, fine grinding, grinding parameter are as follows: 400 mesh of wear particle size are carried out；Grinding wheel speed 30m/s；Workpiece turns
Fast 0.5m/s；Grinding depth < 0.005mm；Movement speed 0.07m/s, it is longitudinal into mill amount 0.05mm.
Beneficial effects of the present invention: (1) present invention provides a kind of rail traffic high-precision bearing processing technology, embryo material by
Self-control GCr15 bearing steel is made, and wherein GCr15 bearing steel is that a kind of alloy content is less, has superperformance, is most widely used
High-carbon-chromium bearing steel, there is high and uniform hardness, good wearability, high contact fatigue after quenching add-back fire
Can, and the self-control GCr15 bearing steel in the present invention, each group assignment system is rationally scientific, and comprehensive performance is good, has after spheroidizing good
Good machinability, quenching and temper number are high and uniform, and wear-resisting property and contact fatigue strength are high, hot-workability
Can be good, price is relatively cheap, ensure that the original hardness and intensity of bearing post-production, improves the high rigidity, wear-resisting of bearing
The performances such as damage, anticorrosive and high-precision；
(2) present invention is by reinforcing the control to raw material grain size, beginning forging, the final forging temperature control of optimization Forge Heating process
System, when forging molding after, ensure that bearing forging grain size and with batch forging grain size difference requirement；
(3) it is molten compared to simple salt bath quenching after salt bath quenching process of the present invention joined water into hardening media
The cooling capacity of salt, hardening media greatly increases, so that bearing ring component generates good quenching harden ability；Quenching stress
Small, strong hardness is high, and tissue metallurgical transformation is uniform, and whole good compactness, so that the bearing quality of preparation is high, surfacing,
Surface hardness is uniform, and quality is stablized；
(4) present invention is handled by repeatedly grinding, and bearing surface is bright and clean, and flatness is high；
(5) processing technology of the invention is easy to produce in enormous quantities, and raw material prepares rationally science, can significantly improve the reliable of bearing
Property and high precision performance, have very big practicability and promotional value etc..
Specific embodiment
Carry out the embodiment that the present invention will be described in detail below with reference to embodiment, whereby to the present invention how application technology hand
Section solves technical problem, and the realization process for reaching technical effect can fully understand and implement.
It should be noted that writing length to save specification, unnecessary repetition and waste are avoided, in the feelings not conflicted
Under condition, the features in the embodiments and the embodiments of the present application be can be combined with each other.
A kind of self-control GCr15 bearing steel of embodiment 1
A kind of self-control GCr15 bearing steel, the parts by weight of each constituent be respectively as follows: 100 parts by weight of iron powder, 2 parts by weight of carbon dust,
0.4 parts by weight of titanium valve, 0.9 parts by weight of manganese powder, 0.6 parts by weight of nano-cerium oxide, 0.8 parts by weight of nano chromium oxide, nano active
0.9 parts by weight of agent, 0.3 parts by weight of molybdenum powder, 0.3 parts by weight of zirconium powder, 12 parts by weight of aluminium powder, 0.9 parts by weight of tungsten carbide, 11 weight of copper powder
Measure part.
A kind of self-control GCr15 bearing steel of embodiment 2
A kind of self-control GCr15 bearing steel, the parts by weight of each constituent be respectively as follows: 100 parts by weight of iron powder, 2 parts by weight of carbon dust,
0.4 parts by weight of titanium valve, 0.9 parts by weight of manganese powder, 0.6 parts by weight of nano-cerium oxide, 0.8 parts by weight of nano chromium oxide, nano active
0.9 parts by weight of agent, 0.3 parts by weight of molybdenum powder, 0.4 parts by weight of zirconium powder, 14 parts by weight of aluminium powder, 1 parts by weight of tungsten carbide, 12 weight of copper powder
Part.
A kind of self-control GCr15 bearing steel of embodiment 3
A kind of self-control GCr15 bearing steel, the parts by weight of each constituent be respectively as follows: 100 parts by weight of iron powder, 2 parts by weight of carbon dust,
0.4 parts by weight of titanium valve, 0.9 parts by weight of manganese powder, 0.6 parts by weight of nano-cerium oxide, 0.8 parts by weight of nano chromium oxide, nano active
0.9 parts by weight of agent, 0.3 parts by weight of molybdenum powder, 0.5 parts by weight of zirconium powder, 16 parts by weight of aluminium powder, 1.1 parts by weight of tungsten carbide, 13 weight of copper powder
Measure part.
A kind of 4 rail traffic high-precision bearing processing technology of embodiment
A kind of rail traffic high-precision bearing processing technology, comprising the following steps:
1) embryo material is chosen: embryo material is self-control GCr15 bearing steel；
2) primary blank handle: to above-mentioned steps 1) in embryo material component carry out forging processing, turnery processing, Milling Process, obtain
To the crude green body of the bearing；
3) grain size is examined: examining the grain size of crude green body, grain size control is 6 grades -8 grades；
4) sawing: crude green body is cut off on sawing machine according to length needed for this that be processed bearing, guarantees the disconnected size of material
Precision obtains the primary blank of the bearing；
5) it is heat-treated: the obtained bearing primary blank is heat-treated, be heat-treated by spheroidizing, quenching and lonneal
A production line continuous production is formed, annealing temperature is 850 DEG C, obtains the bearing crude green body；
Wherein, it is quenched specifically: S1, hardening media is put into salt bath furnace is heated to 600 DEG C, be added into hardening media
Water, agitation obtain quenching liquid so that water is uniformly distributed in hardening media；
S2, the bearing primary blank obtained after step 4) is handled is put into salt bath and is heated, salt bath heating temperature is
1050 DEG C, keep the temperature 2h；
S3, by step S2, treated that primary blank is transferred in heating furnace, and heating furnace is brought rapidly up to 700 DEG C, keeps the temperature 3.5h,
After heating and thermal insulation, quenching treatment 2.5h is carried out using the quenching liquid that step S1 is obtained；
6) grinding is handled: S1, roughly grind by bearing crude green body, grinding parameter are as follows: 150 mesh of wear particle size；Grinding wheel speed
25-30m/s；Workpiece rotational frequency 0.3m/s；Grinding depth < 0.01mm；Movement speed 0.2-0.3m/min, it is longitudinal into mill amount 0.025-
0.05mm；S2, fine grinding, grinding parameter are as follows: 400 mesh of wear particle size are carried out；Grinding wheel speed 25-30m/s；Workpiece rotational frequency 0.5m/
s；Grinding depth < 0.005mm；Movement speed 0.05-0.1m/s, it is longitudinal into mill amount 0.025-0.05mm；
7) spray-on coating: rush-resisting material will be sprayed by the bearing crude green body surface of step 6) grinding processing, obtains high bearing first product；
8) the bearing first product Jing Guo step 7) spray treatment is subjected to surfacing and deburred；
9) it will be put into oil pan and soaked by the bearing first product of step 8) processing, obtain the automobile bearing finished product；
10) finally, whether the obtained bearing completed products of desk checking are qualified, qualified finished product is packed and stored.
As priority scheme of the invention, the hardening media in step 5) of the present invention in quenching treatment is sodium nitrate.
As priority scheme of the invention, tempering in step 5) of the present invention is to be tempered to protect in 175 DEG C of tempering furnace
It is air-cooled to room temperature after warm 5h, wherein tempering 5 times.
As priority scheme of the invention, step 6) grinding processing of the present invention: S1, roughly grind by bearing crude green body,
Its grinding parameter are as follows: 150 mesh of wear particle size；Grinding wheel speed 27m/s；Workpiece rotational frequency 0.3m/s；Grinding depth < 0.01mm；It is mobile
Speed 0.25m/min, it is longitudinal into mill amount 0.035mm；S2, fine grinding, grinding parameter are as follows: 400 mesh of wear particle size are carried out；Grinding wheel turns
Fast 30m/s；Workpiece rotational frequency 0.5m/s；Grinding depth < 0.005mm；Movement speed 0.07m/s, it is longitudinal into mill amount 0.05mm.
Wherein, the self-control GCr15 bearing steel of the present embodiment 4 is same as Example 1.
A kind of 5 rail traffic high-precision bearing processing technology of embodiment
A kind of rail traffic high-precision bearing processing technology, comprising the following steps:
1) embryo material is chosen: embryo material is self-control GCr15 bearing steel；
2) primary blank handle: to above-mentioned steps 1) in embryo material component carry out forging processing, turnery processing, Milling Process, obtain
To the crude green body of the bearing；
3) grain size is examined: examining the grain size of crude green body, grain size control is 6 grades -8 grades；
4) sawing: crude green body is cut off on sawing machine according to length needed for this that be processed bearing, guarantees the disconnected size of material
Precision obtains the primary blank of the bearing；
5) it is heat-treated: the obtained bearing primary blank is heat-treated, be heat-treated by spheroidizing, quenching and lonneal
A production line continuous production is formed, annealing temperature is 850 DEG C, obtains the bearing crude green body；
Wherein, it is quenched specifically: S1, hardening media is put into salt bath furnace is heated to 600 DEG C, be added into hardening media
Water, agitation obtain quenching liquid so that water is uniformly distributed in hardening media；
S2, the bearing primary blank obtained after step 4) is handled is put into salt bath and is heated, salt bath heating temperature is
1050 DEG C, keep the temperature 2h；
S3, by step S2, treated that primary blank is transferred in heating furnace, and heating furnace is brought rapidly up to 700 DEG C, keeps the temperature 3.5h,
After heating and thermal insulation, quenching treatment 2.5h is carried out using the quenching liquid that step S1 is obtained；
6) grinding is handled: S1, roughly grind by bearing crude green body, grinding parameter are as follows: 150 mesh of wear particle size；Grinding wheel speed
25-30m/s；Workpiece rotational frequency 0.3m/s；Grinding depth < 0.01mm；Movement speed 0.2-0.3m/min, it is longitudinal into mill amount 0.025-
0.05mm；S2, fine grinding, grinding parameter are as follows: 400 mesh of wear particle size are carried out；Grinding wheel speed 25-30m/s；Workpiece rotational frequency 0.5m/
s；Grinding depth < 0.005mm；Movement speed 0.05-0.1m/s, it is longitudinal into mill amount 0.025-0.05mm；
7) spray-on coating: rush-resisting material will be sprayed by the bearing crude green body surface of step 6) grinding processing, obtains high bearing first product；
8) the bearing first product Jing Guo step 7) spray treatment is subjected to surfacing and deburred；
9) it will be put into oil pan and soaked by the bearing first product of step 8) processing, obtain the automobile bearing finished product；
10) finally, whether the obtained bearing completed products of desk checking are qualified, qualified finished product is packed and stored.
As priority scheme of the invention, the hardening media in step 5) of the present invention in quenching treatment is sodium nitrate.
As priority scheme of the invention, tempering in step 5) of the present invention is to be tempered to protect in 175 DEG C of tempering furnace
It is air-cooled to room temperature after warm 5h, wherein tempering 5 times.
As priority scheme of the invention, step 6) grinding processing of the present invention: S1, roughly grind by bearing crude green body,
Its grinding parameter are as follows: 150 mesh of wear particle size；Grinding wheel speed 27m/s；Workpiece rotational frequency 0.3m/s；Grinding depth < 0.01mm；It is mobile
Speed 0.25m/min, it is longitudinal into mill amount 0.035mm；S2, fine grinding, grinding parameter are as follows: 400 mesh of wear particle size are carried out；Grinding wheel turns
Fast 30m/s；Workpiece rotational frequency 0.5m/s；Grinding depth < 0.005mm；Movement speed 0.07m/s, it is longitudinal into mill amount 0.05mm.
Wherein, the self-control GCr15 bearing steel of the present embodiment 4 is same as Example 2.
A kind of 6 rail traffic high-precision bearing processing technology of embodiment
A kind of rail traffic high-precision bearing processing technology, comprising the following steps:
1) embryo material is chosen: embryo material is self-control GCr15 bearing steel；
2) primary blank handle: to above-mentioned steps 1) in embryo material component carry out forging processing, turnery processing, Milling Process, obtain
To the crude green body of the bearing；
3) grain size is examined: examining the grain size of crude green body, grain size control is 6 grades -8 grades；
4) sawing: crude green body is cut off on sawing machine according to length needed for this that be processed bearing, guarantees the disconnected size of material
Precision obtains the primary blank of the bearing；
5) it is heat-treated: the obtained bearing primary blank is heat-treated, be heat-treated by spheroidizing, quenching and lonneal
A production line continuous production is formed, annealing temperature is 850 DEG C, obtains the bearing crude green body；
Wherein, it is quenched specifically: S1, hardening media is put into salt bath furnace is heated to 600 DEG C, be added into hardening media
Water, agitation obtain quenching liquid so that water is uniformly distributed in hardening media；
S2, the bearing primary blank obtained after step 4) is handled is put into salt bath and is heated, salt bath heating temperature is
1050 DEG C, keep the temperature 2h；
S3, by step S2, treated that primary blank is transferred in heating furnace, and heating furnace is brought rapidly up to 700 DEG C, keeps the temperature 3.5h,
After heating and thermal insulation, quenching treatment 2.5h is carried out using the quenching liquid that step S1 is obtained；
6) grinding is handled: S1, roughly grind by bearing crude green body, grinding parameter are as follows: 150 mesh of wear particle size；Grinding wheel speed
25-30m/s；Workpiece rotational frequency 0.3m/s；Grinding depth < 0.01mm；Movement speed 0.2-0.3m/min, it is longitudinal into mill amount 0.025-
0.05mm；S2, fine grinding, grinding parameter are as follows: 400 mesh of wear particle size are carried out；Grinding wheel speed 25-30m/s；Workpiece rotational frequency 0.5m/
s；Grinding depth < 0.005mm；Movement speed 0.05-0.1m/s, it is longitudinal into mill amount 0.025-0.05mm；
7) spray-on coating: rush-resisting material will be sprayed by the bearing crude green body surface of step 6) grinding processing, obtains high bearing first product；
8) the bearing first product Jing Guo step 7) spray treatment is subjected to surfacing and deburred；
9) it will be put into oil pan and soaked by the bearing first product of step 8) processing, obtain the automobile bearing finished product；
10) finally, whether the obtained bearing completed products of desk checking are qualified, qualified finished product is packed and stored.
As priority scheme of the invention, the hardening media in step 5) of the present invention in quenching treatment is sodium nitrate.
As priority scheme of the invention, tempering in step 5) of the present invention is to be tempered to protect in 175 DEG C of tempering furnace
It is air-cooled to room temperature after warm 5h, wherein tempering 5 times.
As priority scheme of the invention, step 6) grinding processing of the present invention: S1, roughly grind by bearing crude green body,
Its grinding parameter are as follows: 150 mesh of wear particle size；Grinding wheel speed 27m/s；Workpiece rotational frequency 0.3m/s；Grinding depth < 0.01mm；It is mobile
Speed 0.25m/min, it is longitudinal into mill amount 0.035mm；S2, fine grinding, grinding parameter are as follows: 400 mesh of wear particle size are carried out；Grinding wheel turns
Fast 30m/s；Workpiece rotational frequency 0.5m/s；Grinding depth < 0.005mm；Movement speed 0.07m/s, it is longitudinal into mill amount 0.05mm.
Wherein, the self-control GCr15 bearing steel of the present embodiment 4 is same as Example 3.
All above-mentioned this intellectual properties of primarily implementation, there is no this new products of implementation of setting limitation other forms
And/or new method.Those skilled in the art will utilize this important information, above content modification, to realize similar execution feelings
Condition.But all modifications or transformation belong to the right of reservation based on new product of the present invention.
Claims (7)
1. a kind of rail traffic high-precision bearing processing technology, it is characterised in that: the following steps are included:
1) embryo material is chosen: embryo material is self-control GCr15 bearing steel, makes the parts by weight difference of each constituent of GCr15 bearing steel by oneself
Are as follows: 100 parts by weight of iron powder, 2 parts by weight of carbon dust, 0.4 parts by weight of titanium valve, 0.9 parts by weight of manganese powder, 0.6 parts by weight of nano-cerium oxide,
0.8 parts by weight of nano chromium oxide, 0.9 parts by weight of nanoparticle active agent, 0.3 parts by weight of molybdenum powder, zirconium powder 0.3-0.5 parts by weight, aluminium powder
12-16 parts by weight, tungsten carbide 0.9-1.1 parts by weight, copper powder 11-13 parts by weight；
2) primary blank handle: to above-mentioned steps 1) in embryo material component carry out forging processing, turnery processing, Milling Process, obtain
To the crude green body of the bearing；
3) grain size is examined: examining the grain size of crude green body, grain size control is 6 grades -8 grades；
4) sawing: crude green body is cut off on sawing machine according to length needed for this that be processed bearing, guarantees the disconnected size of material
Precision obtains the primary blank of the bearing；
5) it is heat-treated: the obtained bearing primary blank is heat-treated, be heat-treated by spheroidizing, quenching and lonneal
A production line continuous production is formed, annealing temperature is 850 DEG C, obtains the bearing crude green body；
Wherein, it is quenched specifically: S1, hardening media is put into salt bath furnace is heated to 600 DEG C, be added into hardening media
Water, agitation obtain quenching liquid so that water is uniformly distributed in hardening media；
S2, the bearing primary blank obtained after step 4) is handled is put into salt bath and is heated, salt bath heating temperature is
1050 DEG C, keep the temperature 2h；
S3, by step S2, treated that primary blank is transferred in heating furnace, and heating furnace is brought rapidly up to 700 DEG C, keeps the temperature 3.5h,
After heating and thermal insulation, quenching treatment 2.5h is carried out using the quenching liquid that step S1 is obtained；
6) grinding is handled: S1, roughly grind by bearing crude green body, grinding parameter are as follows: 150 mesh of wear particle size；Grinding wheel speed
25-30m/s；Workpiece rotational frequency 0.3m/s；Grinding depth < 0.01mm；Movement speed 0.2-0.3m/min, it is longitudinal into mill amount 0.025-
0.05mm；S2, fine grinding, grinding parameter are as follows: 400 mesh of wear particle size are carried out；Grinding wheel speed 25-30m/s；Workpiece rotational frequency 0.5m/
s；Grinding depth < 0.005mm；Movement speed 0.05-0.1m/s, it is longitudinal into mill amount 0.025-0.05mm；
7) spray-on coating: rush-resisting material will be sprayed by the bearing crude green body surface of step 6) grinding processing, obtains high bearing first product；
8) the bearing first product Jing Guo step 7) spray treatment is subjected to surfacing and deburred；
9) it will be put into oil pan and soaked by the bearing first product of step 8) processing, obtain the automobile bearing finished product；
10) finally, whether the obtained bearing completed products of desk checking are qualified, qualified finished product is packed and stored.
2. a kind of rail traffic high-precision bearing processing technology according to claim 1, it is characterised in that: in step 1)
The parts by weight for making each constituent of GCr15 bearing steel by oneself are respectively as follows: 100 parts by weight of iron powder, 2 parts by weight of carbon dust, 0.4 weight of titanium valve
Measure part, 0.9 parts by weight of manganese powder, 0.6 parts by weight of nano-cerium oxide, 0.8 parts by weight of nano chromium oxide, 0.9 weight of nanoparticle active agent
Part, 0.3 parts by weight of molybdenum powder, 0.3 parts by weight of zirconium powder, 12 parts by weight of aluminium powder, 0.9 parts by weight of tungsten carbide, 11 parts by weight of copper powder.
3. a kind of rail traffic high-precision bearing processing technology according to claim 1, it is characterised in that: in step 1)
The parts by weight for making each constituent of GCr15 bearing steel by oneself are respectively as follows: 100 parts by weight of iron powder, 2 parts by weight of carbon dust, 0.4 weight of titanium valve
Measure part, 0.9 parts by weight of manganese powder, 0.6 parts by weight of nano-cerium oxide, 0.8 parts by weight of nano chromium oxide, 0.9 weight of nanoparticle active agent
Part, 0.3 parts by weight of molybdenum powder, 0.4 parts by weight of zirconium powder, 14 parts by weight of aluminium powder, 1 parts by weight of tungsten carbide, 12 parts by weight of copper powder.
4. a kind of rail traffic high-precision bearing processing technology according to claim 1, it is characterised in that: in step 1)
The parts by weight for making each constituent of GCr15 bearing steel by oneself are respectively as follows: 100 parts by weight of iron powder, 2 parts by weight of carbon dust, 0.4 weight of titanium valve
Measure part, 0.9 parts by weight of manganese powder, 0.6 parts by weight of nano-cerium oxide, 0.8 parts by weight of nano chromium oxide, 0.9 weight of nanoparticle active agent
Part, 0.3 parts by weight of molybdenum powder, 0.5 parts by weight of zirconium powder, 16 parts by weight of aluminium powder, 1.1 parts by weight of tungsten carbide, 13 parts by weight of copper powder.
5. a kind of rail traffic high-precision bearing processing technology according to claim 1, it is characterised in that: in step 5)
Hardening media in quenching treatment is sodium nitrate.
6. a kind of rail traffic high-precision bearing processing technology according to claim 1, it is characterised in that: in step 5)
Tempering is to be air-cooled to room temperature after tempering heat preservation 5h in 175 DEG C of tempering furnace, wherein tempering 5 times.
7. a kind of rail traffic high-precision bearing processing technology according to claim 1, it is characterised in that: step 6) mill
It cuts processing: S1, roughly grind by bearing crude green body, grinding parameter are as follows: 150 mesh of wear particle size；Grinding wheel speed 27m/s；Work
Part revolving speed 0.3m/s；Grinding depth < 0.01mm；Movement speed 0.25m/min, it is longitudinal into mill amount 0.035mm；S2, fine grinding is carried out,
Its grinding parameter are as follows: 400 mesh of wear particle size；Grinding wheel speed 30m/s；Workpiece rotational frequency 0.5m/s；Grinding depth < 0.005mm；It is mobile
Speed 0.07m/s, it is longitudinal into mill amount 0.05mm.
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| CN201811370878.9A CN109468541A (en) | 2018-11-18 | 2018-11-18 | A kind of rail traffic high-precision bearing processing technology |
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| CN201811370878.9A CN109468541A (en) | 2018-11-18 | 2018-11-18 | A kind of rail traffic high-precision bearing processing technology |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110454553A (en) * | 2019-08-21 | 2019-11-15 | 嘉兴市中诚自润轴承有限公司 | A kind of high abrasion guide plate and its production method |
| CN116422559A (en) * | 2023-04-07 | 2023-07-14 | 浙江朋诚科技有限公司 | Surface treatment process for oil film bearing of high-speed rolling mill |
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Application publication date: 20190315 |