CN106222569A - A kind of self-lubrication alloy high rigidity bearing - Google Patents

A kind of self-lubrication alloy high rigidity bearing Download PDF

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Publication number
CN106222569A
CN106222569A CN201610624932.2A CN201610624932A CN106222569A CN 106222569 A CN106222569 A CN 106222569A CN 201610624932 A CN201610624932 A CN 201610624932A CN 106222569 A CN106222569 A CN 106222569A
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self
high rigidity
ball
bearing
alloy high
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卢顺俊
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Ningbo Daer Machinery Technology Co Ltd
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Ningbo Daer Machinery Technology Co Ltd
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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
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • 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
    • C21D1/19—Hardening; Quenching with or without subsequent tempering by interrupted quenching
    • C21D1/20—Isothermal quenching, e.g. bainitic hardening
    • 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
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/004—Heat treatment of ferrous alloys containing Cr and Ni
    • 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
    • C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
    • 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
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • 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
    • 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
    • C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
    • 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
    • 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
    • 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
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/32—Ferrous alloys, e.g. steel alloys containing chromium with boron
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/32—Balls
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/58—Raceways; Race rings
    • F16C33/583—Details of specific parts of races
    • F16C33/585—Details of specific parts of races of raceways, e.g. ribs to guide the rollers
    • 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
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/002—Bainite

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Rolling Contact Bearings (AREA)
  • Heat Treatment Of Articles (AREA)

Abstract

The invention discloses a kind of self-lubrication alloy high rigidity bearing, including bearing outer ring, ball and bearing inner race, wherein the outer roller surface of bearing inner race is coated with politef, ball is ferroalloy, its component includes by weight percentage: C:0.2～0.5%, Si:0.3～0.6%, B:0.04～0.07%, V:0.1～0.3%, Ni:0.05～0.08%, Mo:0.2～0.3%, Nb:0.13～0.17%, Al:0.2～0.4%, Cr:3.2～4.0%, Zr:0.07～0.1%, Sc:0.05～0.08%, Y:0.07～0.1%, S≤0.015%, P≤0.02%, surplus is Fe.The self-lubrication alloy high rigidity bearing of the present invention, frictional force is little, and abrasion is few, and hardness is big, and tenacity excellent, contact fatigue property is good, and service life is long.

Description

A kind of self-lubrication alloy high rigidity bearing
Technical field
The present invention relates to technical field of bearings, particularly relate to a kind of self-lubrication alloy high rigidity bearing.
Background technology
Bearing be the conventional machine components in order to bearing journal or axle upper rotary part for determine rotary shaft with other zero Part relative motion position, reduces the coefficient of friction in its motor process, and ensures its rotating accuracy, its quality and bearing capacity Directly affect the service behaviour of machinery complete machine.
Operation principle according to bearing can be divided into rolling friction bearing (rolling bearing) and sliding friction bearing (sliding axle Hold).Rolling bearing is mainly ball bearing, and ball bearing is general purpose accessory, but ball hardness therein is not enough, weares and teares bigger.
Summary of the invention
The technical problem existed based on background technology, the present invention proposes a kind of self-lubrication alloy high rigidity bearing, friction Power is little, and abrasion is few, and hardness is big, and tenacity excellent, contact fatigue property is good, and service life is long.
A kind of self-lubrication alloy high rigidity bearing that the present invention proposes, including bearing outer ring, ball and bearing inner race, wherein The outer roller surface of bearing inner race is coated with politef, and ball is ferroalloy, and its component includes by weight percentage: C:0.2～ 0.5%, Si:0.3～0.6%, B:0.04～0.07%, V:0.1～0.3%, Ni:0.05～0.08%, Mo:0.2～ 0.3%, Nb:0.13～0.17%, Al:0.2～0.4%, Cr:3.2～4.0%, Zr:0.07～0.1%, Sc:0.05～ 0.08%, Y:0.07～0.1%, S≤0.015%, P≤0.02%, surplus is Fe.
Preferably, Cr element, Ni element, Mo element, the content of Nb element meet following relation: 100 × nCr=[100 × (nNi+nMo+nNb)]2+ 3.2, wherein nCr、nNi、nMo、nNbRepresent that Cr element, Ni element, Mo element, Nb element are at ball respectively Shared percentage by weight in component.
Preferably, Al element, Zr element, Sc element, the content of Y element meet following relation: 100 × nAl=100 × (nZr+nSc+nY)+0.1, wherein nAl、nZr、nSc、nYRepresent Al element, Zr element, Sc element, the Y element component at ball respectively Percentage by weight shared by.
Preferably, the preparation technology of ball includes: melting, cast and heat treatment；Wherein heat treatment includes: at austenitizing Reason, isothermal hardening, tempering.
Preferably, the temperature that austenitizing processes is 920～950 DEG C, and the time that austenitizing processes is 2～3h.
Preferably, the concrete operations that austenitizing processes are as follows: after pouring into a mould, material is with the ramp of 3～4 DEG C/min To 530～560 DEG C, it is incubated 6～8h, then with the ramp of 1.5～2.5 DEG C/min to 720～750 DEG C, is incubated 3～4h, Again with the ramp of 1～2 DEG C/min to 840～870 DEG C, then with the ramp of 0.5～0.8 DEG C/min to 920～950 DEG C, it is incubated 2～3h.
Preferably, the concrete operations of isothermal hardening are as follows: after being processed by austenitizing, material air is cooled to 400～450 DEG C, so Being placed in nitrate salt bath insulation 28～38min, the temperature of nitrate salt bath is 300～350 DEG C, then air cooling.
Preferably, the concrete operations of tempering are as follows: material after isothermal hardening is warming up to 232～235 DEG C, insulation 2.5～ 3h。
In the present invention, each element interaction is as follows:
Carbon (C): as forming the essential element of graphite nodule, can effectively control graphite number and graphite size, meanwhile, Suitable carbon equivalent can make ferrum liquid readily flowed, increases the mold-filling capacity of ferrum liquid, reduces Shrinkage cavity, improves the densification of foundry goods Property, but carbon content is too high, easily produces graphite floatation, affects the performance of cast iron, also can reduce the atmospheric corrosion resistance ability of steel, Increase cold brittleness and the aging sensitivity of steel.
Silicon (Si): as strongly facilitating graphited element, the effect bred can be played again.Higher silicon content is to foundry goods Cast and have the biggest benefit from feeding, the elastic limit of steel, yield point and tensile strength can be significantly improved.Silicone content is high A bit, to being formed, globular graphite is favourable, but silicone content more than 3.0% time, impact flexibility can drastically reduce, moreover it is possible to reduces the welding of steel Performance.Silicon and molybdenum, tungsten, chromium etc. combine, and are improved corrosion resistance and antioxidative effect.
Boron (B): boron Main Function in steel is to increase the quenching degree of steel, thus saves other diluter expensive metals；Steel The boron of middle addition trace just can improve compactness and the hot rolling performance of steel, improves intensity；Boron and nitrogen and oxygen have strong affinity, boiling Rise the boron adding 0.007% in steel, the aging phenomenon of steel can be eliminated.
Vanadium (V): as the excellent deoxidizer of steel, can thinning microstructure crystal grain, improve intensity and toughness.The carbon that vanadium is formed with carbon Compound, can improve resistant to hydrogen corrosive power at high temperature under high pressure.
Nickel (Ni): reinforced ferrite refine pearlite in steel, while improving hardness of steel, to the toughness of steel, moulds Property and other techniques performance infringement little compared with the impact of other alloying elements；For medium carbon steel, owing to nickel reduces pearlite Transition temperature, makes pearlite attenuate；Reduce the phosphorus content of eutectoid point due to nickel again, thus with the carbon steel of identical carbon content Ratio, its pearlite fraction is more, and the intensity making nickeliferous pearlitic ferrite steel is high compared with the carbon steel of same carbon content；Can also carry High steel is to tired drag and reduces the steel sensitivity to breach；The acid and alkali-resistance ability of steel can be improved, to air and salt simultaneously There is resistance to corrosion.
Molybdenum (Mo): energy crystal grain thinning, improves quenching degree and thermostrength, keeps enough intensity and creep resistant when high temperature Ability, improves mechanical performance；The fragility that steel alloy causes can also be suppressed due to fire.
Niobium (Nb): can partly dissolve in solid solution, plays solution strengthening effect；The through hardening of steel is significantly improved when dissolving in austenite Property；Steel belt roof bolt stability can be increased, have post-curing effect.Trace niobium can be in the situation of the plasticity or toughness not affecting steel The intensity of lower raising steel；Owing to having the effect of crystal grain thinning, the impact flexibility of steel can be improved and reduce its brittle transition temperature； When content is more than 8 times of carbon, almost can fix all of carbon in steel, make steel have good resistant to hydrogen performance；At austenite Steel is possible to prevent the oxide isolation intercrystalline corrosion to steel；Due to fixed carbon and precipitation-hardening effect, the height of refractory steel can be improved Warm nature energy, such as creep strength etc..
Aluminum (Al): as deoxidizer conventional in steel, can crystal grain thinning, improve impact flexibility, also have non-oxidizability and Corrosion resistance, share high temperature non-scale performance and the ability of high-temperature corrosion resistance being remarkably improved steel with chromium, silicon；But can affect The hot-working character of steel, welding performance and machinability.
Chromium (Cr): can improve quenching degree, can significantly improve intensity, hardness and wearability, moreover it is possible to improve the non-oxidizability of steel And corrosion resistance, but plasticity and toughness can be reduced, and also it is carbide former simultaneously, in spheroidal graphite cast-iron, it can be raw with carbon Become M3C-type carbide as effective Hard Inclusion Dispersed precipitate on matrix, can improve hardness and the abrasion resistance of material.Through examination Issuing after examination and approval existing confirmation: containing Cr0.5%, carbide accounts for 15～20%, meets actual demand.
Zirconium (Zr): as carbide, the effect in steel and niobium, tantalum, vanadium are similar, can deaerate, purify And the cryogenic property of crystal grain thinning, beneficially steel, improve punching performance.
Scandium (Sc) and yttrium (Y): affect the type of nonmetallic inclusionsin steel, quantity and form, purify steel, decrease Al2O3Harm to fatigue behaviour, the most highly advantageous to high cycle fatigue and low-cycle fatigue, promote the structural transformation in steel, can be adsorbed on The solid-state nucleating surface grown up, forms thin enriched layer, drops low-surface-energy, hinders crystal growth, thus reduces crystal Growth rate, refines skeleton, suppresses column crystals growth, and then reduces dendritic segregation and regional segregation, crystal grain thinning, presses down Temper brittleness processed, improves the thermoplasticity of steel, heat resistance, fatigue behaviour, wearability, resistant to hydrogen embrittlement, non-oxidizability.
Gained bearing anti-wear performance of the present invention and tenacity excellent, hardness is high, and contact fatigue property is good, and service life is long； Chromium element, nickel element, molybdenum element, niobium element solid solution, in austenite, reduce Carbon diffusion speed, thus delay austenite Change, refine pearlite, extend the stage of incubation of bainite transformation, be therefore easy to increase the ferritic quantity of bainite type, in Austria Hinder the movement of crystal boundary and growing up of crystal grain during family name's body, refined the crystal grain of austenite, thus provide for bainite More favorable nucleation position so that the quantity of bainite increases during isothermal hardening, and has refined bainite structure, Making the amount of retained austenite in ball gradually decrease, the amount of acicular ferrite is gradually increased and becomes tiny densification, and carbide Quantity increase the most therewith, the toughness of the present invention, hardness, anti-wear performance and contact fatigue property are greatly improved；Aluminium element, zirconium unit Element, scandium element, yttrium cooperate, the oxygen element in the removing present invention, and crystal grain thinning improves impact flexibility, and can carry High cast iron eutectoid transformation temperature, it is therefore prevented that the graphitization of pearlite is decomposed, improves bearing mechanical property in hot environment and resistance to Corrosive power, improves the service life of bearing, meets the high request to bearing in actual production process；Use isothermal hardening, It is placed in nitrate salt bath insulation, utilizes the high specific heat capacity of nitrate to carry out fast cooling, make austenite change into bainite, greatly Amplitude improves the toughness of ball, thus meets the actual demand of bearing, then by lonneal, reduces the quenching residual of ball Stress and fragility, improve hardness and the wearability of ball further.
Detailed description of the invention
Below, by specific embodiment, technical scheme is described in detail.
Embodiment 1
A kind of self-lubrication alloy high rigidity bearing that the present invention proposes, including bearing outer ring, ball and bearing inner race, wherein The outer roller surface of bearing inner race is coated with politef, and ball is ferroalloy, and its component includes by weight percentage: C:0.2%, Si:0.6%, B:0.04%, V:0.3%, Ni:0.05%, Mo:0.3%, Nb:0.13%, Al:0.4%, Cr:3.2%, Zr: 0.1%, Sc:0.05%, Y:0.1%, S≤0.015%, P≤0.02%, surplus is Fe.
Embodiment 2
A kind of self-lubrication alloy high rigidity bearing that the present invention proposes, including bearing outer ring, ball and bearing inner race, wherein The outer roller surface of bearing inner race is coated with politef, and ball is ferroalloy, and its component includes by weight percentage: C:0.5%, Si:0.3%, B:0.07%, V:0.1%, Ni:0.08%, Mo:0.2%, Nb:0.17%, Al:0.2%, Cr:4.0%, Zr: 0.07%, Sc:0.08%, Y:0.07%, S≤0.015%, P≤0.02%, surplus is Fe.
The preparation technology of ball includes: melting, cast and heat treatment；Wherein heat treatment includes: austenitizing processes, isothermal Quenching, tempering.
Embodiment 3
A kind of self-lubrication alloy high rigidity bearing that the present invention proposes, including bearing outer ring, ball and bearing inner race, wherein The outer roller surface of bearing inner race is coated with politef, and ball is ferroalloy, and its component includes by weight percentage: C: 0.25%, Si:0.55%, B:0.045%, V:0.28%, Ni:0.055%, Mo:0.29%, Nb:0.135%, Al: 0.38%, Cr:3.3%, Zr:0.095%, Sc:0.055%, Y:0.095%, S≤0.015%, P≤0.02%, surplus is Fe。
The preparation technology of ball includes: melting, cast and heat treatment；Wherein heat treatment includes: austenitizing processes, isothermal Quenching, tempering.
The temperature that austenitizing processes is 920 DEG C, and the time that austenitizing processes is 3h.
The concrete operations of isothermal hardening are as follows: after being processed by austenitizing, material air is cooled to 400 DEG C, is subsequently placed in nitrate Being incubated 38min in salt bath, the temperature of nitrate salt bath is 300 DEG C, then air cooling.
The concrete operations of tempering are as follows: material after isothermal hardening is warming up to 235 DEG C, are incubated 2.5h.
Embodiment 4
A kind of self-lubrication alloy high rigidity bearing that the present invention proposes, including bearing outer ring, ball and bearing inner race, wherein The outer roller surface of bearing inner race is coated with politef, and ball is ferroalloy, and its component includes by weight percentage: C: 0.45%, Si:0.35%, B:0.065%, V:0.12%, Ni:0.075%, Mo:0.21%, Nb:0.165%, Al: 0.22%, Cr:3.9%, Zr:0.075%, Sc:0.075%, Y:0.065%, S≤0.015%, P≤0.02%, surplus is Fe。
The preparation technology of ball includes: melting, cast and heat treatment；Wherein heat treatment includes: austenitizing processes, isothermal Quenching, tempering.
The temperature that austenitizing processes is 950 DEG C, and the time that austenitizing processes is 2h.
The concrete operations of isothermal hardening are as follows: after being processed by austenitizing, material air is cooled to 450 DEG C, is subsequently placed in nitrate Being incubated 28min in salt bath, the temperature of nitrate salt bath is 350 DEG C, then air cooling.
The concrete operations of tempering are as follows: material after isothermal hardening is warming up to 232 DEG C, are incubated 3h.
Embodiment 5
A kind of self-lubrication alloy high rigidity bearing that the present invention proposes, including bearing outer ring, ball and bearing inner race, wherein The outer roller surface of bearing inner race is coated with politef, and ball is ferroalloy, and its component includes by weight percentage: C:0.3%, Si:0.5%, B:0.05%, V:0.26%, Ni:0.06%, Mo:0.27%, Nb:0.14%, Al:0.35%, Cr:3.5%, Zr:0.09%, Sc:0.07%, Y:0.09%, S≤0.015%, P≤0.02%, surplus is Fe.
The preparation technology of ball includes: melting, cast and heat treatment；Wherein heat treatment includes: austenitizing processes, isothermal Quenching, tempering.
The concrete operations that austenitizing processes are as follows: after pouring into a mould, material is with the ramp of 3 DEG C/min to 560 DEG C, protects Temperature 6h, then with the ramp of 2.5 DEG C/min to 720 DEG C, is incubated 4h, then with the ramp of 1 DEG C/min to 870 DEG C, so After with the ramp of 0.5 DEG C/min to 950 DEG C, be incubated 2h.
The concrete operations of isothermal hardening are as follows: after being processed by austenitizing, material air is cooled to 440 DEG C, is subsequently placed in nitrate Being incubated 30min in salt bath, the temperature of nitrate salt bath is 340 DEG C, then air cooling.
The concrete operations of tempering are as follows: material after isothermal hardening is warming up to 233 DEG C, are incubated 2.9h.
Embodiment 6
A kind of self-lubrication alloy high rigidity bearing that the present invention proposes, including bearing outer ring, ball and bearing inner race, wherein The outer roller surface of bearing inner race is coated with politef, and ball is ferroalloy, and its component includes by weight percentage: C:0.4%, Si:0.4%, B:0.06%, V:0.14%, Ni:0.07%, Mo:0.23%, Nb:0.16%, Al:0.25%, Cr:3.7%, Zr:0.08%, Sc:0.07%, Y:0.07%, S≤0.015%, P≤0.02%, surplus is Fe.
The preparation technology of ball includes: melting, cast and heat treatment；Wherein heat treatment includes: austenitizing processes, isothermal Quenching, tempering.
The concrete operations that austenitizing processes are as follows: after pouring into a mould, material is with the ramp of 4 DEG C/min to 530 DEG C, protects Temperature 8h, then with the ramp of 1.5 DEG C/min to 750 DEG C, is incubated 3h, then with the ramp of 2 DEG C/min to 840 DEG C, so After with the ramp of 0.8 DEG C/min to 920 DEG C, be incubated 3h.
The concrete operations of isothermal hardening are as follows: after being processed by austenitizing, material air is cooled to 410 DEG C, is subsequently placed in nitrate Being incubated 36min in salt bath, the temperature of nitrate salt bath is 310 DEG C, then air cooling.
The concrete operations of tempering are as follows: material after isothermal hardening is warming up to 234 DEG C, are incubated 2.6h.
Embodiment 7
A kind of self-lubrication alloy high rigidity bearing that the present invention proposes, including bearing outer ring, ball and bearing inner race, wherein The outer roller surface of bearing inner race is coated with politef, and ball is ferroalloy, and its component includes by weight percentage: C: 0.32%, Si:0.47%, B:0.052%, V:0.22%, Ni:0.064%, Mo:0.26%, Nb:0.145%, Al: 0.31%, Cr:3.55%, Zr:0.088%, Sc:0.063%, Y:0.085%, S≤0.015%, P≤0.02%, surplus is Fe。
The preparation technology of ball includes: melting, cast and heat treatment；Wherein heat treatment includes: austenitizing processes, isothermal Quenching, tempering.
The concrete operations that austenitizing processes are as follows: will after cast material with the ramp of 3.2 DEG C/min to 550 DEG C, Insulation 6.5h, then with the ramp of 2.2 DEG C/min to 730 DEG C, is incubated 3.8h, then with the ramp of 1.4 DEG C/min extremely 860 DEG C, then with the ramp of 0.6 DEG C/min to 940 DEG C, it is incubated 2.3h.
The concrete operations of isothermal hardening are as follows: after being processed by austenitizing, material air is cooled to 430 DEG C, is subsequently placed in nitrate Being incubated 32min in salt bath, the temperature of nitrate salt bath is 330 DEG C, then air cooling.
The concrete operations of tempering are as follows: material after isothermal hardening is warming up to 233 DEG C, are incubated 2.8h.
Embodiment 8
A kind of self-lubrication alloy high rigidity bearing that the present invention proposes, including bearing outer ring, ball and bearing inner race, wherein The outer roller surface of bearing inner race is coated with politef, and ball is ferroalloy, and its component includes by weight percentage: C: 0.32%, Si:0.47%, B:0.052%, V:0.22%, Ni:0.064%, Mo:0.26%, Nb:0.145%, Al: 0.31%, Cr:3.55%, Zr:0.088%, Sc:0.063%, Y:0.085%, S≤0.015%, P≤0.02%, surplus is Fe。
The preparation technology of ball includes: melting, cast and heat treatment；Wherein heat treatment includes: austenitizing processes, isothermal Quenching, tempering.
The concrete operations that austenitizing processes are as follows: will after cast material with the ramp of 3.2 DEG C/min to 550 DEG C, Insulation 6.5h, then with the ramp of 2.2 DEG C/min to 730 DEG C, is incubated 3.8h, then with the ramp of 1.4 DEG C/min extremely 860 DEG C, then with the ramp of 0.6 DEG C/min to 940 DEG C, it is incubated 2.3h.
The concrete operations of isothermal hardening are as follows: after being processed by austenitizing, material air is cooled to 430 DEG C, is subsequently placed in nitrate Being incubated 32min in salt bath, the temperature of nitrate salt bath is 330 DEG C, then air cooling.
The concrete operations of tempering are as follows: material after isothermal hardening is warming up to 233 DEG C, are incubated 2.8h.
Embodiment 9
A kind of self-lubrication alloy high rigidity bearing that the present invention proposes, including bearing outer ring, ball and bearing inner race, wherein The outer roller surface of bearing inner race is coated with politef, and ball is ferroalloy, and its component includes by weight percentage: C:0.5%, Si:0.3%, B:0.07%, V:0.1%, Ni:0.08%, Mo:0.2%, Nb:0.17%, Al:0.2%, Cr:3.4025%, Zr:0.07%, Sc:0.08%, Y:0.07%, S≤0.015%, P≤0.02%, surplus is Fe.
Embodiment 10
A kind of self-lubrication alloy high rigidity bearing that the present invention proposes, including bearing outer ring, ball and bearing inner race, wherein The outer roller surface of bearing inner race is coated with politef, and ball is ferroalloy, and its component includes by weight percentage: C:0.5%, Si:0.3%, B:0.07%, V:0.1%, Ni:0.08%, Mo:0.2%, Nb:0.17%, Al:0.32%, Cr:4.0%, Zr: 0.07%, Sc:0.08%, Y:0.07%, S≤0.015%, P≤0.02%, surplus is Fe.
Embodiment 7-10 gained self-lubrication alloy high rigidity bearing is carried out performance detection, and its result is as follows
The above, the only present invention preferably detailed description of the invention, but protection scope of the present invention is not limited thereto, Any those familiar with the art in the technical scope that the invention discloses, according to technical scheme and Inventive concept equivalent or change in addition, all should contain within protection scope of the present invention.

Claims (8)

1. a self-lubrication alloy high rigidity bearing, including bearing outer ring, ball and bearing inner race, it is characterised in that its axis Holding the outer roller surface of inner ring and be coated with politef, ball is ferroalloy, and its component includes by weight percentage: C:0.2～ 0.5%, Si:0.3～0.6%, B:0.04～0.07%, V:0.1～0.3%, Ni:0.05～0.08%, Mo:0.2～ 0.3%, Nb:0.13～0.17%, Al:0.2～0.4%, Cr:3.2～4.0%, Zr:0.07～0.1%, Sc:0.05～ 0.08%, Y:0.07～0.1%, S≤0.015%, P≤0.02%, surplus is Fe.
Self-lubrication alloy high rigidity bearing the most according to claim 1, it is characterised in that Cr element, Ni element, Mo element, The content of Nb element meets following relation: 100 × nCr=[100 × (nNi+nMo+nNb)]2+ 3.2, wherein nCr、nNi、nMo、nNbPoint Biao Shi Cr element, Ni element, Mo element, Nb element shared percentage by weight in the component of ball.
Self-lubrication alloy high rigidity bearing the most according to claim 1 or claim 2, it is characterised in that Al element, Zr element, Sc unit Element, the content of Y element meet following relation: 100 × nAl=100 × (nZr+nSc+nY)+0.1, wherein nAl、nZr、nSc、nYRespectively Represent Al element, Zr element, Sc element, Y element shared percentage by weight in the component of ball.
4. according to self-lubrication alloy high rigidity bearing described in any one of claim 1-3, it is characterised in that the preparation technology of ball Including: melting, cast and heat treatment；Wherein heat treatment includes: austenitizing processes, isothermal hardening, tempering.
Self-lubrication alloy high rigidity bearing the most according to claim 4, it is characterised in that the temperature that austenitizing processes is 920～950 DEG C, the time that austenitizing processes is 2～3h.
6. according to self-lubrication alloy high rigidity bearing described in claim 4 or 5, it is characterised in that it is concrete that austenitizing processes Operate as follows: will after cast material with the ramp of 3～4 DEG C/min to 530～560 DEG C, be incubated 6～8h, then with 1.5～ The ramp of 2.5 DEG C/min, to 720～750 DEG C, is incubated 3～4h, then with the ramp of 1～2 DEG C/min to 840～870 DEG C, then with the ramp of 0.5～0.8 DEG C/min to 920～950 DEG C, it is incubated 2～3h.
7. according to self-lubrication alloy high rigidity bearing described in any one of claim 4-6, it is characterised in that isothermal hardening concrete Operate as follows: by austenitizing process after material air be cooled to 400～450 DEG C, be subsequently placed in nitrate salt bath insulation 28～ 38min, the temperature of nitrate salt bath is 300～350 DEG C, then air cooling.
8. according to self-lubrication alloy high rigidity bearing described in any one of claim 4-7, it is characterised in that the concrete operations of tempering As follows: material after isothermal hardening is warming up to 232～235 DEG C, it is incubated 2.5～3h.
CN201610624932.2A 2016-08-01 2016-08-01 A kind of self-lubrication alloy high rigidity bearing Pending CN106222569A (en)

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CN105673706A (en) * 2016-02-23 2016-06-15 安徽省宁国顺昌机械有限公司 Wear-resistant and corrosion-resistant bearing
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Application publication date: 20161214