CN108468010A - A kind of superhard wear-resistant composite material precision bearing outer ring and its processing technology - Google Patents

A kind of superhard wear-resistant composite material precision bearing outer ring and its processing technology Download PDF

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Publication number
CN108468010A
CN108468010A CN201810173339.XA CN201810173339A CN108468010A CN 108468010 A CN108468010 A CN 108468010A CN 201810173339 A CN201810173339 A CN 201810173339A CN 108468010 A CN108468010 A CN 108468010A
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bearing
ring
chromium
carbon
wear
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廖春惠
葛泓
乐建朝
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Jiangsu Bojet Precision Forging Co Ltd
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Jiangsu Bojet Precision Forging Co Ltd
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    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23CCOATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C4/00Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/02Pretreatment of the material to be coated, e.g. for coating on selected surface areas
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C19/00Alloys based on nickel or cobalt
    • C22C19/03Alloys based on nickel or cobalt based on nickel
    • C22C19/05Alloys based on nickel or cobalt based on nickel with chromium
    • C22C19/051Alloys based on nickel or cobalt based on nickel with chromium and Mo or W
    • C22C19/055Alloys based on nickel or cobalt based on nickel with chromium and Mo or W with the maximum Cr content being at least 20% but less than 30%
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/001Ferrous alloys, e.g. steel alloys containing N
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/02Ferrous alloys, e.g. steel alloys containing silicon
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/04Ferrous alloys, e.g. steel alloys containing manganese
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/06Ferrous alloys, e.g. steel alloys containing aluminium
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/18Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/24Ferrous alloys, e.g. steel alloys containing chromium with vanadium
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/18Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/28Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23CCOATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C4/00Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/04Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
    • C23C4/06Metallic material
    • C23C4/08Metallic material containing only metal elements
    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23CCOATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C4/00Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/04Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
    • C23C4/10Oxides, borides, carbides, nitrides or silicides; Mixtures thereof
    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23CCOATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C4/00Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/12Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
    • C23C4/129Flame spraying
    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23CCOATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C4/00Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/18After-treatment
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30Parts of ball or roller bearings
    • F16C33/58Raceways; Race rings
    • F16C33/62Selection of substances
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30Parts of ball or roller bearings
    • F16C33/58Raceways; Race rings
    • F16C33/64Special methods of manufacture
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2204/00Metallic materials; Alloys
    • F16C2204/60Ferrous alloys, e.g. steel alloys
    • F16C2204/66High carbon steel, i.e. carbon content above 0.8 wt%, e.g. through-hardenable steel
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2204/00Metallic materials; Alloys
    • F16C2204/60Ferrous alloys, e.g. steel alloys
    • F16C2204/70Ferrous alloys, e.g. steel alloys with chromium as the next major constituent

Abstract

The invention belongs to the matched precision bearing manufacturing technology fields of critical host, a kind of superhard wear-resistant composite material precision bearing outer ring is provided, by high-carbon-chromium bearing steel inner core, nichrome adhesive layer and wear-resistant ceramic outer layer composition, high-carbon-chromium bearing steel inner core is process by high-carbon-chromium bearing steel blank forging, nichrome adhesive layer and wear-resistant ceramic outer layer are by heat spraying method even application in high-carbon-chromium bearing steel core surface, 65 ~ 70 wt.% of nickel content in nichrome adhesive layer, 25 ~ 30wt.% of chromium content, remaining is impurity, wear-resistant ceramic outer layer is made of the 75 ~ 80wt.% of tungsten carbide and 20 ~ 25wt.% of chromium carbide of mass percent, nichrome adhesive layer thickness is 100 ~ 120um, wear-resistant ceramic outer layer thickness is 280 ~ 320um.By supersonic flame spraying in the tungsten carbide and chromium carbide of the superhard super abrasive of high-carbon-chromium bearing steel surface spraying, the performance of bearing outer ring is further increased;Wear-resistant, corrosion-resistant, high temperature resistant is anti-oxidant, and service life can extend decades of times.

Description

A kind of superhard wear-resistant composite material precision bearing outer ring and its processing technology
Technical field
The invention belongs to the matched precision bearing manufacturing technology fields of critical host, and in particular, to a kind of superhard resistance to Grind composite material precision bearing outer ring and its processing technology.
Background technology
Bearing outer ring is typically secured on the shell of bearing block or machine, plays roller body.In bearing length During time operates use, bearing outer ring is vulnerable part, cannot be reused after damage, and larger waste is caused.Therefore, outside bearing The intensity and wearability of circle are crucial, and when processing bearing outer ring, selected material and processing technology determine bearing outer ring Intensity and wearability, for precision bearing, size, material, the processing technology of bearing outer ring determine its accurate rank.
Supersonic spray coating is to obtain high temperature, high speed flame stream for spraying feedstock by special flame gun and obtain superiority The method of energy coating.Supersonic spray coating particle rapidity is up to 300-650m/s, thus high speed flame spraying layer is fine and close, in conjunction with strong Degree is high, and the porosity of coating is smaller than 0.5%, and bond strength is close to or up to the quality of detonation sprayed coating up to 150mpa, shows It writes and is better than plasma sprayed coating and electrodeposited chromium layers.When supersonic spray coating feeding is nanostructure, gained coating structure is fine and close, ties Conjunction intensity is high, hardness is high, porosity is low, Coating Surface Roughness is low, has nano level surface smoothness.
Invention content
Goal of the invention:The purpose of the present invention is to provide a kind of superhard wear-resistant composite material precision bearing outer ring and its processing Technique.By supersonic flame spraying in the tungsten carbide and chromium carbide of the superhard super abrasive of high-carbon-chromium bearing steel surface spraying, formed Superhard, super abrasive damage, corrosion-resistant, high temperature resistant, oxidation resistant even compact coating, further increase the performance of bearing outer ring, make With life longer decades of times.
The technical solution adopted in the present invention:The present invention provides a kind of superhard wear-resistant composite material precision bearing outer ring, It is made of high-carbon-chromium bearing steel inner core, nichrome adhesive layer and wear-resistant ceramic outer layer, the high-carbon-chromium bearing steel inner core is by height Carbon chromium bearing steel blank forging is process, the high-carbon-chromium bearing steel blank, ingredient percent C:0.85%~ 1.05%, Si:0.10%~0.35%, Mn:0.20%~0.45%, Cr:1.30%~1.75%, S:0.004%~ 0.020%, V:0.015%~0.035%, Zr:0.008%~0.01%, Ti:0.003%~0.015%, Al:0.010% ~0.030%, O:0.0004%~0.0009%, N:0.0015%~0.0055%, surplus is Fe and inevitable impurity; 65 ~ 70 wt.% of nickel content, 25 ~ 30wt.% of chromium content in the nichrome adhesive layer, remaining is impurity;The wear-resistant ceramic Outer layer is made of the 75 ~ 80wt.% of tungsten carbide and 20 ~ 25wt.% of chromium carbide of mass percent.
Further, the processing technology of a kind of superhard wear-resistant composite material precision bearing outer ring, includes the following steps:1)It is accurate The inner core of standby high-carbon-chromium bearing steel bearing outer ring;2)Preheat 825 ± 25 DEG C of the inner core of high-carbon-chromium bearing steel bearing outer ring;3)Pre- The high-carbon-chromium bearing steel bearing outer ring thermal spraying on surface nichrome powder of heat is as bond coating, in the nichrome powder Nickel content 65 ~ 70 wt.%, 25 ~ 30wt.% of chromium content, remaining is impurity;4)Wear-resistant ceramic outer layer thermal spraying:Weigh quality percentage 20 ~ 25wt.% of 75 ~ 80wt.% of tungsten carbide and chromium carbide of ratio, is applied on bond coating after mixing by thermal jet, in high-carbon Chromium bearing steel bearing race core surface forms the superhard outer layer of the super abrasive of one layer of even compact;5)Boart boart is used after cooling Wheel carries out fine grinding to gained wearing composite material bearing outer ring.
Further, the step 1)The processing technology of high-carbon-chromium bearing steel inner core include following process:(a)In Frequency induction heater is to high-carbon-chromium bearing steel blank heating to 1150 ± 50 DEG C;(b)According to the size of bearing outer ring to be processed Mould circle is selected, is forged using Balance mechanism;(c)It is carried out in roller-bottom type continuity nitrogen group protecting atmosphere stove after depanning Spheroidizing;(d)Ball blast 20min is carried out using shot-blasting machine, removes the oxide scale layer and oxidation film on surface, improves rough surface Degree;(e)Cold 7 ~ 10s of rolling, 8 ~ 12MPa of whole diameter pressure are carried out using 8 ~ 16MPa of cold-rolling enlarging machine setting rolling pressure;(f)Cleaning Processing:The heavier rubbish of bearing outer ring inner wall and raceway face is carried out rotation using automatic motor nylon bristle to scrub, then Using multiple-grooved channel-type ultrasonic wave, using bearing use aqueous cleaning agent as cleansing medium frequency 30kHz, power 1kW ultrasound Wave cleans up small rubbish, carries out originally water flowing and rinses;Repeated washing, rinsing 2 ~ 3 times, finally drying obtain high-carbon Chromium bearing steel inner core.By combining forging technology and cold rolling technology, Optimizing Technical, automation mechanized operation, to improve height The processing technology of carbon chromium bearing steel inner core;By cleaning treatment, makes bearing outer ring without small rubbish, increase cleannes;
Further, the process(c)Spheroidizing, annealing process temperature range is as follows:One area:760 ~ 780 DEG C, 2nd area: 805 ~ 815 DEG C, 3rd area:795 ~ 805 DEG C, 4th area:785 ~ 805 DEG C, 5th area:755 ~ 775 DEG C, 6th area:715 ~ 735 DEG C, 7th area: 705 ~ 725 DEG C, 8th area:675~695℃
Further, the process(c)Spheroidizing process, spherodized structure, decarburized layer and net are checked using metallographic examination instrument Shape carbide.Spherodized structure is at 2 ~ 4 grades;Practical decarburized depth≤0.2mm;Net carbide≤2.5 grade.
Further, the step 3)100 ~ 120um of nichrome adhesive layer thickness.
Further, the step 4)280 ~ 320um of wear-resistant ceramic outer layer thickness.
Further, the step 3)Or 4)The thermal jet is painted with supersonic flame spraying.Specifically use the U.S. The JP5000 type supersonic velocity flame plating equipments spraying nichrome adhesive layer and wear-resistant coating of Praxair companies production.Pass through Supersonic flame spraying further increases bearing in the tungsten carbide and chromium carbide of the superhard super abrasive of high-carbon-chromium bearing steel surface spraying The performance of outer ring;Wear-resistant, corrosion-resistant, high temperature resistant is anti-oxidant, and service life can extend decades of times.
Further, the spray distance of the supersonic flame spraying be 330 ~ 355mm, 8 ~ 15 lbs/hr of spray rate, 1850 ~ 1950 SCFH of oxygen flow.The barrel length of selection uses 4 inch, powder sending quantity to be set as 5 RPM.
Further, the step 5)Fine grinding, be ground using two-step method, the first step:It is roughly ground, is ground Cutting parameter is:Wear particle size 125-150 mesh;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;Second step:Fine grinding is carried out, grinding parameter is:Abrasive grain Granularity 380-400 mesh;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 0.025 ~ 0.05mm of mill amount.By fine grinding, higher surface smoothness is obtained.
The beneficial effects of the invention are as follows:
(1)By combining forging technology and cold rolling technology, Optimizing Technical, automation mechanized operation, to improve high carbon chromium axis Hold the processing technology of steel inner core;By cleaning treatment, makes bearing outer ring without small rubbish, increase cleannes.
(2)The tungsten carbide in the superhard super abrasive of high-carbon-chromium bearing steel surface spraying and carbonization by supersonic flame spraying Chromium forms superhard, super abrasive damage, corrosion-resistant, high temperature resistant, oxidation resistant even compact coating, further increases bearing outer ring Performance, service life can extend decades of times.
(3)By fine grinding, higher surface smoothness is obtained.
Specific implementation mode
Below will be by several specific embodiments, the present invention is furture elucidated, these embodiments simply to illustrate that problem, It is not a kind of limitation.
Embodiment 1:
A kind of superhard wear-resistant composite material precision bearing outer ring, by high-carbon-chromium bearing steel inner core, nichrome adhesive layer and wear-resisting Top ceramic layer forms, and the high-carbon-chromium bearing steel inner core is process by high-carbon-chromium bearing steel blank forging, the high carbon chromium axis Hold steel blank, ingredient percent C:0.85%~1.05%, Si:0.10%~0.35%, Mn:0.20%~ 0.45%, Cr:1.30%~1.75%, S:0.004%~0.020%, V:0.015%~0.035%, Zr:0.008%~ 0.01%, Ti:0.003%~0.015%, Al:0.010%~0.030%, O:0.0004%~0.0009%, N: 0.0015%~0.0055%, surplus is Fe and inevitable impurity;Nickel content 65 in the nichrome adhesive layer Wt.%, chromium content 30wt.%, remaining is impurity;The wear-resistant ceramic outer layer is by the tungsten carbide 75wt.% of mass percent and carbonization Chromium 25wt.% compositions.
Further, the processing technology of a kind of superhard wear-resistant composite material precision bearing outer ring, includes the following steps:1)It is accurate The inner core of standby high-carbon-chromium bearing steel bearing outer ring;2)Preheat 825 ± 25 DEG C of the inner core of high-carbon-chromium bearing steel bearing outer ring;3)Pre- The high-carbon-chromium bearing steel bearing outer ring thermal spraying on surface nichrome powder of heat is as bond coating, in the nichrome powder Nickel content 65 wt.%, chromium content 30wt.%, remaining is impurity;4)Wear-resistant ceramic outer layer thermal spraying:Weigh the carbon of mass percent Change tungsten 75wt.% and chromium carbide 25wt.%, is applied on bond coating by thermal jet after mixing, in high-carbon-chromium bearing steel bearing Enclose the superhard outer layer that core surface forms the super abrasive of one layer of even compact;5)It is wear-resisting to gained using skive after cooling Composite shaft bearing outer-ring carries out fine grinding.
Further, the step 1)The processing technology of high-carbon-chromium bearing steel inner core include following process:(a)In Frequency induction heater is to high-carbon-chromium bearing steel blank heating to 1150 ± 50 DEG C;(b)According to the size of bearing outer ring to be processed Mould circle is selected, is forged using Balance mechanism;(c)It is carried out in roller-bottom type continuity nitrogen group protecting atmosphere stove after depanning Spheroidizing;(d)Ball blast 20min is carried out using shot-blasting machine, removes the oxide scale layer and oxidation film on surface, improves rough surface Degree;(e)Cold rolling 10s, whole diameter pressure 8MPa are carried out using cold-rolling enlarging machine setting rolling pressure 8MPa;(f)Cleaning treatment:Using The heavier rubbish of bearing outer ring inner wall and raceway face is carried out rotation and scrubbed by automatic motor nylon bristle, then logical using multiple-grooved Road formula ultrasonic wave uses ultrasonic wave of the aqueous cleaning agent as cleansing medium in frequency 30kHz, power 1kW will be small using bearing Rubbish cleans up, and carries out originally water flowing and rinses;Repeated washing, rinsing 2 times, finally drying obtain in high-carbon-chromium bearing steel Core.By combining forging technology and cold rolling technology, Optimizing Technical, automation mechanized operation, to improve high-carbon-chromium bearing steel The processing technology of inner core;By cleaning treatment, makes bearing outer ring without small rubbish, increase cleannes;
Further, the process(c)Spheroidizing, annealing process temperature range is as follows:One area:760 ~ 780 DEG C, 2nd area: 805 ~ 815 DEG C, 3rd area:795 ~ 805 DEG C, 4th area:785 ~ 805 DEG C, 5th area:755 ~ 775 DEG C, 6th area:715 ~ 735 DEG C, 7th area: 705 ~ 725 DEG C, 8th area:675~695℃
Further, the process(c)Spheroidizing process, spherodized structure, decarburized layer and net are checked using metallographic examination instrument Shape carbide.Spherodized structure is at 2 ~ 4 grades;Practical decarburized depth≤0.2mm;Net carbide≤2.5 grade.
Further, the step 3)Nichrome adhesive layer thickness 100um.
Further, the step 4)Wear-resistant ceramic outer layer thickness 320um.
Further, the step 3)Or 4)The thermal jet is painted with supersonic flame spraying.Specifically use the U.S. The JP5000 type supersonic velocity flame plating equipments spraying nichrome adhesive layer and wear-resistant coating of Praxair companies production.Pass through Supersonic flame spraying further increases bearing in the tungsten carbide and chromium carbide of the superhard super abrasive of high-carbon-chromium bearing steel surface spraying The performance of outer ring;Wear-resistant, corrosion-resistant, high temperature resistant is anti-oxidant, and service life can extend decades of times.
Further, the spray distance of the supersonic flame spraying is 330mm, 8 lbs/hr of spray rate, oxygen stream Measure 1850 SCFH.The barrel length of selection uses 4 inch, powder sending quantity to be set as 5 RPM.
Further, the step 5)Fine grinding, be ground using two-step method, the first step:It is roughly ground, is ground Cutting parameter is:1250 mesh of wear particle size;Grinding wheel speed 25m/s;Workpiece rotational frequency 0.3m/s;Grinding depth<0.01mm;Mobile speed 0.2m/min is spent, it is longitudinal into mill amount 0.025mm;Second step:Fine grinding is carried out, grinding parameter is:380 mesh of wear particle size;Grinding wheel Rotating speed 25m/s;Workpiece rotational frequency 0.5m/s;Grinding depth<0.005mm;Movement speed 0.05m/s, it is longitudinal into mill amount 0.025mm. By fine grinding, higher surface smoothness is obtained.
Embodiment 2
A kind of superhard wear-resistant composite material precision bearing outer ring, by high-carbon-chromium bearing steel inner core, nichrome adhesive layer and wear-resisting Top ceramic layer forms, and the high-carbon-chromium bearing steel inner core is process by high-carbon-chromium bearing steel blank forging, the high carbon chromium axis Hold steel blank, ingredient percent C:0.85%~1.05%, Si:0.10%~0.35%, Mn:0.20%~ 0.45%, Cr:1.30%~1.75%, S:0.004%~0.020%, V:0.015%~0.035%, Zr:0.008%~ 0.01%, Ti:0.003%~0.015%, Al:0.010%~0.030%, O:0.0004%~0.0009%, N: 0.0015%~0.0055%, surplus is Fe and inevitable impurity;Nickel content 70wt.% in the nichrome adhesive layer, Chromium content 28wt.%, remaining is impurity;The wear-resistant ceramic outer layer by mass percent tungsten carbide 78wt.% and chromium carbide 22wt.% is formed.
Further, the processing technology of a kind of superhard wear-resistant composite material precision bearing outer ring, includes the following steps:1)It is accurate The inner core of standby high-carbon-chromium bearing steel bearing outer ring;2)Preheat 825 ± 25 DEG C of the inner core of high-carbon-chromium bearing steel bearing outer ring;3)Pre- The high-carbon-chromium bearing steel bearing outer ring thermal spraying on surface nichrome powder of heat is as bond coating, in the nichrome powder Nickel content 70 wt.%, chromium content 28wt.%, remaining is impurity;4)Wear-resistant ceramic outer layer thermal spraying:Weigh the carbon of mass percent Change tungsten 78wt.% and chromium carbide 22wt.%, is applied on bond coating by thermal jet after mixing, in high-carbon-chromium bearing steel bearing Enclose the superhard outer layer that core surface forms the super abrasive of one layer of even compact;5)It is wear-resisting to gained using skive after cooling Composite shaft bearing outer-ring carries out fine grinding.
Further, the step 1)The processing technology of high-carbon-chromium bearing steel inner core include following process:(a)In Frequency induction heater is to high-carbon-chromium bearing steel blank heating to 1150 ± 50 DEG C;(b)According to the size of bearing outer ring to be processed Mould circle is selected, is forged using Balance mechanism;(c)It is carried out in roller-bottom type continuity nitrogen group protecting atmosphere stove after depanning Spheroidizing;(d)Ball blast 20min is carried out using shot-blasting machine, removes the oxide scale layer and oxidation film on surface, improves rough surface Degree;(e)Cold rolling 8s, whole diameter pressure 10MPa are carried out using cold-rolling enlarging machine setting rolling pressure 10MPa;(f)Cleaning treatment:It adopts The heavier rubbish of bearing outer ring inner wall and raceway face is carried out rotation with automatic motor nylon bristle to scrub, then uses multiple-grooved Channel-type ultrasonic wave uses ultrasonic wave of the aqueous cleaning agent as cleansing medium in frequency 30kHz, power 1kW will be small using bearing Rubbish clean up, carry out originally water flowing rinse;Repeated washing, rinsing 3 times, finally drying obtain in high-carbon-chromium bearing steel Core.By combining forging technology and cold rolling technology, Optimizing Technical, automation mechanized operation, to improve high-carbon-chromium bearing steel The processing technology of inner core;By cleaning treatment, makes bearing outer ring without small rubbish, increase cleannes;
Further, the process(c)Spheroidizing, annealing process temperature range is as follows:One area:760 ~ 780 DEG C, 2nd area: 805 ~ 815 DEG C, 3rd area:795 ~ 805 DEG C, 4th area:785 ~ 805 DEG C, 5th area:755 ~ 775 DEG C, 6th area:715 ~ 735 DEG C, 7th area: 705 ~ 725 DEG C, 8th area:675~695℃
Further, the process(c)Spheroidizing process, spherodized structure, decarburized layer and net are checked using metallographic examination instrument Shape carbide.Spherodized structure is at 3 grades;Practical decarburized depth≤0.2mm;Net carbide≤2.5 grade.
Further, the step 3)Nichrome adhesive layer thickness 110um.
Further, the step 4)Wear-resistant ceramic outer layer thickness 300um.
Further, the step 3)Or 4)The thermal jet is painted with supersonic flame spraying.Specifically use the U.S. The JP5000 type supersonic velocity flame plating equipments spraying nichrome adhesive layer and wear-resistant coating of Praxair companies production.Pass through Supersonic flame spraying further increases bearing in the tungsten carbide and chromium carbide of the superhard super abrasive of high-carbon-chromium bearing steel surface spraying The performance of outer ring;Wear-resistant, corrosion-resistant, high temperature resistant is anti-oxidant, and service life can extend decades of times.
Further, the spray distance of the supersonic flame spraying is 355mm, 15 lbs/hr of spray rate, oxygen stream Measure 1950 SCFH.The barrel length of selection uses 4 inch, powder sending quantity to be set as 5 RPM.
Further, the step 5)Fine grinding, be ground using two-step method, the first step:It is roughly ground, is ground Cutting parameter is:150 mesh of wear particle size;Grinding wheel speed 30m/s;Workpiece rotational frequency 0.3m/s;Grinding depth<0.01mm;Movement speed 0.3m/min, it is longitudinal into mill amount 0.05mm;Second step:Fine grinding is carried out, grinding parameter is:400 mesh of wear particle size;Grinding wheel turns Fast 30m/s;Workpiece rotational frequency 0.5m/s;Grinding depth<0.005mm;Movement speed 0.1m/s, it is longitudinal into mill amount 0.05mm.Pass through Fine grinding obtains higher surface smoothness.
Embodiment 3
A kind of superhard wear-resistant composite material precision bearing outer ring, by high-carbon-chromium bearing steel inner core, nichrome adhesive layer and wear-resisting Top ceramic layer forms, and the high-carbon-chromium bearing steel inner core is process by high-carbon-chromium bearing steel blank forging, the high carbon chromium axis Hold steel blank, ingredient percent C:0.85%~1.05%, Si:0.10%~0.35%, Mn:0.20%~ 0.45%, Cr:1.30%~1.75%, S:0.004%~0.020%, V:0.015%~0.035%, Zr:0.008%~ 0.01%, Ti:0.003%~0.015%, Al:0.010%~0.030%, O:0.0004%~0.0009%, N: 0.0015%~0.0055%, surplus is Fe and inevitable impurity;Nickel content 69 in the nichrome adhesive layer Wt.%, chromium content 30wt.%, remaining is impurity;The wear-resistant ceramic outer layer is by the tungsten carbide 80wt.% of mass percent and carbonization Chromium 20wt.% compositions.
Further, the processing technology of a kind of superhard wear-resistant composite material precision bearing outer ring, includes the following steps:1)It is accurate The inner core of standby high-carbon-chromium bearing steel bearing outer ring;2)Preheat 825 ± 25 DEG C of the inner core of high-carbon-chromium bearing steel bearing outer ring;3)Pre- The high-carbon-chromium bearing steel bearing outer ring thermal spraying on surface nichrome powder of heat is as bond coating, in the nichrome powder Nickel content 69 wt.%, chromium content 30wt.%, remaining is impurity;4)Wear-resistant ceramic outer layer thermal spraying:Weigh the carbon of mass percent Change tungsten 80wt.% and chromium carbide 20wt.%, is applied on bond coating by thermal jet after mixing, in high-carbon-chromium bearing steel bearing Enclose the superhard outer layer that core surface forms the super abrasive of one layer of even compact;5)It is wear-resisting to gained using skive after cooling Composite shaft bearing outer-ring carries out fine grinding.
Further, the step 1)The processing technology of high-carbon-chromium bearing steel inner core include following process:(a)In Frequency induction heater is to high-carbon-chromium bearing steel blank heating to 1150 ± 50 DEG C;(b)According to the size of bearing outer ring to be processed Mould circle is selected, is forged using Balance mechanism;(c)It is carried out in roller-bottom type continuity nitrogen group protecting atmosphere stove after depanning Spheroidizing;(d)Ball blast 20min is carried out using shot-blasting machine, removes the oxide scale layer and oxidation film on surface, improves rough surface Degree;(e)Cold rolling 10s, whole diameter pressure 12MPa are carried out using cold-rolling enlarging machine setting rolling pressure 16MPa;(f)Cleaning treatment:It adopts The heavier rubbish of bearing outer ring inner wall and raceway face is carried out rotation with automatic motor nylon bristle to scrub, then uses multiple-grooved Channel-type ultrasonic wave uses ultrasonic wave of the aqueous cleaning agent as cleansing medium in frequency 30kHz, power 1kW will be small using bearing Rubbish clean up, carry out originally water flowing rinse;Repeated washing, rinsing 3 times, finally drying obtain in high-carbon-chromium bearing steel Core.By combining forging technology and cold rolling technology, Optimizing Technical, automation mechanized operation, to improve high-carbon-chromium bearing steel The processing technology of inner core;By cleaning treatment, makes bearing outer ring without small rubbish, increase cleannes;
Further, the process(c)Spheroidizing, annealing process temperature range is as follows:One area:760 ~ 780 DEG C, 2nd area: 805 ~ 815 DEG C, 3rd area:795 ~ 805 DEG C, 4th area:785 ~ 805 DEG C, 5th area:755 ~ 775 DEG C, 6th area:715 ~ 735 DEG C, 7th area: 705 ~ 725 DEG C, 8th area:675~695℃
Further, the process(c)Spheroidizing process, spherodized structure, decarburized layer and net are checked using metallographic examination instrument Shape carbide.Spherodized structure is at 4 grades;Practical decarburized depth≤0.2mm;Net carbide≤2.5 grade.
Further, the step 3)Nichrome adhesive layer thickness 120um.
Further, the step 4)Wear-resistant ceramic outer layer thickness 280um.
Further, the step 3)Or 4)The thermal jet is painted with supersonic flame spraying.Specifically use the U.S. The JP5000 type supersonic velocity flame plating equipments spraying nichrome adhesive layer and wear-resistant coating of Praxair companies production.Pass through Supersonic flame spraying further increases bearing in the tungsten carbide and chromium carbide of the superhard super abrasive of high-carbon-chromium bearing steel surface spraying The performance of outer ring;Wear-resistant, corrosion-resistant, high temperature resistant is anti-oxidant, and service life can extend decades of times.
Further, the spray distance of the supersonic flame spraying is 355mm, 15 lbs/hr of spray rate, oxygen stream Measure 1900 SCFH.The barrel length of selection uses 4 inch, powder sending quantity to be set as 5 RPM.
Further, the step 5)Fine grinding, be ground using two-step method, the first step:It is roughly ground, is ground Cutting parameter is:150 mesh of wear particle size;Grinding wheel speed 30m/s;Workpiece rotational frequency 0.3m/s;Grinding depth<0.01mm;Movement speed 0.3m/min, it is longitudinal into mill amount 0.05mm;Second step:Fine grinding is carried out, grinding parameter is:400 mesh of wear particle size;Grinding wheel turns Fast 30m/s;Workpiece rotational frequency 0.5m/s;Grinding depth<0.005mm;Movement speed 0.1m/s, it is longitudinal into mill amount 0.05mm.Pass through Fine grinding obtains higher surface smoothness.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art For member, without departing from the principle of the present invention, several improvement can also be made, these improvement also should be regarded as the present invention's Protection domain.

Claims (10)

1. a kind of superhard wear-resistant composite material precision bearing outer ring, which is characterized in that by high-carbon-chromium bearing steel inner core, nichrome Adhesive layer and wear-resistant ceramic outer layer composition, the high-carbon-chromium bearing steel inner core are process by high-carbon-chromium bearing steel blank forging, The high-carbon-chromium bearing steel blank, ingredient percent C:0.85%~1.05%, Si:0.10%~0.35%, Mn: 0.20%~0.45%, Cr:1.30%~1.75%, S:0.004%~0.020%, V:0.015%~0.035%, Zr: 0.008%~0.01%, Ti:0.003%~0.015%, Al:0.010%~0.030%, O:0.0004%~0.0009%, N:0.0015%~0.0055%, surplus is Fe and inevitable impurity;Nickel content 65 ~ 70 in the nichrome adhesive layer Wt.%, 25 ~ 30wt.% of chromium content, remaining is impurity;The wear-resistant ceramic outer layer by mass percent 75 ~ 80wt.% of tungsten carbide It is formed with 20 ~ 25wt.% of chromium carbide.
2. a kind of processing technology of superhard wear-resistant composite material precision bearing outer ring according to claim 1, feature exist In:Include the following steps:1)Prepare the inner core of high-carbon-chromium bearing steel bearing outer ring;2)Preheat high-carbon-chromium bearing steel bearing outer ring 825 ± 25 DEG C of inner core;3)It is used as in the high-carbon-chromium bearing steel bearing outer ring thermal spraying on surface nichrome powder of preheating and bonds bottom Layer, nickel content 65 ~ 70 wt.%, 25 ~ 30wt.% of chromium content in the nichrome powder, remaining is impurity;4)Outside wear-resistant ceramic Layer thermal spraying:20 ~ the 25wt.% of 75 ~ 80wt.% of tungsten carbide and chromium carbide for weighing mass percent, passes through thermal jet after mixing It is applied on bond coating, forms the superhard outer of the super abrasive of one layer of even compact in high-carbon-chromium bearing steel bearing race core surface Layer;5)Fine grinding is carried out to gained wearing composite material bearing outer ring using skive after cooling.
3. a kind of processing technology of superhard wear-resistant composite material precision bearing outer ring according to claim 2, feature exist In:The step 1)The processing technology of high-carbon-chromium bearing steel inner core include following process:(a)Using Medium Frequency Induction Heating Furnace pair High-carbon-chromium bearing steel blank heating is to 1150 ± 50 DEG C;(b)Mould circle is selected according to the size of bearing outer ring to be processed, using height Fast upsetter is forged;(c)After depanning spheroidizing is carried out in roller-bottom type continuity nitrogen group protecting atmosphere stove;(d)It adopts Ball blast 20min is carried out with shot-blasting machine, removes the oxide scale layer and oxidation film on surface, improves surface roughness;(e)Using cold rolling Machine sets 8 ~ 16MPa of rolling pressure and carries out cold 7 ~ 10s of rolling, 8 ~ 12MPa of whole diameter pressure;(f)Cleaning treatment:Using automatic motor The heavier rubbish of bearing outer ring inner wall and raceway face is carried out rotation and scrubbed by nylon bristle, then uses multiple-grooved channel-type ultrasound Wave uses ultrasonic wave of the aqueous cleaning agent as cleansing medium in frequency 30kHz, power 1kW to clean small rubbish using bearing Totally, originally water flowing is carried out to rinse;Repeated washing, rinsing 2 ~ 3 times, finally drying obtain high-carbon-chromium bearing steel inner core.
4. a kind of processing technology of superhard wear-resistant composite material precision bearing outer ring according to claim 3, feature exist In:The process(c)Spheroidizing, annealing process temperature range is as follows:One area:760 ~ 780 DEG C, 2nd area:805 ~ 815 DEG C, 3rd area:795 ~ 805 DEG C, 4th area:785 ~ 805 DEG C, 5th area:755 ~ 775 DEG C, 6th area:715 ~ 735 DEG C, 7th area:705 ~ 725 DEG C, eight Area:675~695℃.
5. a kind of processing technology of superhard wear-resistant composite material precision bearing outer ring according to claim 3, feature exist In:The process(c)Spheroidizing process, spherodized structure, decarburized layer and net carbide, ball are checked using metallographic examination instrument Change group is woven in 2 ~ 4 grades;Practical decarburized depth≤0.2mm;Net carbide≤2.5 grade.
6. a kind of processing technology of superhard wear-resistant composite material precision bearing outer ring according to claim 2, feature exist In:The step 3)100 ~ 120um of nichrome adhesive layer thickness.
7. wanting a kind of processing technology of superhard wear-resistant composite material precision bearing outer ring described in 2 according to right, it is characterised in that: The step 4)280 ~ 320um of wear-resistant ceramic outer layer thickness.
8. wanting a kind of processing technology of superhard wear-resistant composite material precision bearing outer ring described in 2 according to right, it is characterised in that: The step 3)Or 4)The thermal jet is painted with supersonic flame spraying.
9. wanting a kind of processing technology of superhard wear-resistant composite material precision bearing outer ring described in 9 according to right, it is characterised in that: The spray distance of the supersonic flame spraying is 330 ~ 355mm, 8 ~ 15 lbs/hr of spray rate, oxygen flow 1850 ~ 1950 SCFH。
10. wanting a kind of processing technology of superhard wear-resistant composite material precision bearing outer ring described in 2 according to right, feature exists In:The step 5)Fine grinding, be ground using two-step method, the first step:It is roughly ground, grinding parameter is:Abrasive grain Granularity 125-150 mesh;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;Second step:Fine grinding is carried out, grinding parameter is:Wear particle size 380-400 Mesh;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 0.025 ~ 0.05mm of mill amount.
CN201810173339.XA 2018-03-02 2018-03-02 A kind of superhard wear-resistant composite material precision bearing outer ring and its processing technology Pending CN108468010A (en)

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