CN107100936B - A kind of motor bearing and its manufacturing method - Google Patents

A kind of motor bearing and its manufacturing method Download PDF

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Publication number
CN107100936B
CN107100936B CN201710302001.5A CN201710302001A CN107100936B CN 107100936 B CN107100936 B CN 107100936B CN 201710302001 A CN201710302001 A CN 201710302001A CN 107100936 B CN107100936 B CN 107100936B
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temperature
welding
built
bearing shell
semi
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CN107100936A (en
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陈鹏
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Dezhou Yate Motor Co ltd
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Dezhou Yate Motor Co Ltd
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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
    • 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
    • F16C33/02—Parts of sliding-contact bearings
    • F16C33/04—Brasses; Bushes; Linings
    • F16C33/06—Sliding surface mainly made of metal
    • F16C33/14—Special methods of manufacture; Running-in
    • 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
    • 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
    • C21D6/04—Hardening by cooling below 0 degrees Celsius
    • 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
    • C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C21/00—Alloys based on aluminium
    • C22C21/10—Alloys based on aluminium with zinc as the next major constituent
    • 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
    • C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
    • 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
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/34—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of 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
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
    • 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
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
    • 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
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
    • 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
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with 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
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/52—Ferrous alloys, e.g. steel alloys containing chromium with nickel with cobalt
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C9/00—Alloys based on copper
    • C22C9/06—Alloys based on copper with nickel or cobalt as the next major constituent
    • C—CHEMISTRY; METALLURGY
    • C23—COATING 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
    • C23C—COATING 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
    • C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
    • C23C8/28—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases more than one element being applied in one step
    • C23C8/30—Carbo-nitriding
    • C23C8/32—Carbo-nitriding of ferrous surfaces
    • 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
    • F16C33/02—Parts of sliding-contact bearings
    • F16C33/04—Brasses; Bushes; Linings
    • F16C33/06—Sliding surface mainly made of metal
    • F16C33/10—Construction relative to lubrication
    • 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
    • F16C33/02—Parts of sliding-contact bearings
    • F16C33/04—Brasses; Bushes; Linings
    • F16C33/06—Sliding surface mainly made of metal
    • F16C33/12—Structural composition; Use of special materials or surface treatments, e.g. for rust-proofing
    • F16C33/121—Use of special materials
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/14—Casings; Enclosures; Supports
    • 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
    • F16C2204/00—Metallic materials; Alloys
    • F16C2204/60—Ferrous alloys, e.g. steel alloys
    • F16C2204/62—Low carbon steel, i.e. carbon content below 0.4 wt%
    • 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
    • F16C2220/00—Shaping
    • F16C2220/02—Shaping by casting
    • F16C2220/06—Shaping by casting in situ casting or moulding
    • 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
    • F16C2220/00—Shaping
    • F16C2220/24—Shaping by built-up welding
    • 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
    • F16C2220/00—Shaping
    • F16C2220/40—Shaping by deformation without removing material
    • F16C2220/44—Shaping by deformation without removing material by rolling
    • 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
    • F16C2223/00—Surface treatments; Hardening; Coating
    • F16C2223/10—Hardening, e.g. carburizing, carbo-nitriding
    • 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
    • F16C2223/00—Surface treatments; Hardening; Coating
    • F16C2223/10—Hardening, e.g. carburizing, carbo-nitriding
    • F16C2223/16—Hardening, e.g. carburizing, carbo-nitriding with carbo-nitriding
    • 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
    • F16C2360/00—Engines or pumps
    • F16C2360/22—Internal combustion engines

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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)
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  • Chemical Kinetics & Catalysis (AREA)
  • Manufacturing & Machinery (AREA)
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  • Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
  • Sliding-Contact Bearings (AREA)
  • Heat Treatment Of Articles (AREA)

Abstract

A kind of motor bearing and its manufacturing method, the bearing shell is in tiles semi-cylindrical, bearing shell semi-cylindrical inner surface offers lateral oil groove, oilhole is offered on the oil groove, oil groove groove body surface is coated with titanium carbide coating, bearing shell semi-cylindrical inner surface portion other than degreasing tank groove body surface has aluminium alloy overlay cladding, bearing shell semi-cylindrical outer surface has copper alloy overlay cladding, it is handled by inner surface of bearing bush built-up welding so that axle sleeve reaches higher wearability and fatigue performance, corresponding fatigue behaviour is also improved；By carrying out built-up welding to bearing shell outer surface, anti-corrosion, the high temperature resistant of material are improved, bearing shell carries out subzero treatment and improves its impact resistance and fatigue behaviour.

Description

A kind of motor bearing and its manufacturing method
Technical field
The present invention relates to a kind of motor bearing and its manufacturing method, belongs to technical field of motors.
Background technique
Bearing shell is to make the opposite mechanical organ slided between loading end for supporting axial workpiece and making, it is as key foundation Components have widely in the heavy mechanical equipments such as lathe, motor, generator, internal combustion engine, rolling machinery, mining machinery Using.Especially in internal combustion engine, mechanical performance, functional reliability and the service life that the performance of bearing shell is applied to is suffered from directly The influence connect.Mechanical load is increasing, and high-power low-speed motor is to the property such as the fatigue strength of bearing shell, compliance, bond strength Increasingly higher demands can be proposed.Key components and parts of the bearing shell as big function motor machine, have very high mark to the performance of bearing shell It is quasi-.
Summary of the invention
A kind of motor bearing manufacturing method, the bearing shell are in tiles semi-cylindrical, and bearing shell semi-cylindrical inner surface offers Lateral oil groove, offers oilhole on the oil groove, and oil groove groove body surface is coated with titanium carbide coating, degreasing tank groove body surface with Outer bearing shell semi-cylindrical inner surface has aluminium alloy overlay cladding, and bearing shell semi-cylindrical outer surface has copper alloy overlay cladding,
It is characterized by: bearing shell preparation method: the following steps are included: according to: C:0.3-0.4 ﹪, Si:4-5 ﹪, Ni:2- 3 ﹪, Cr 1-2 ﹪, Co:0.7-0.8 ﹪, Al:0.5-0.6 ﹪, W:0.2-0.3 ﹪, Cu:0.08-0.09 ﹪, Mg:0.07- 0.08 ﹪, Zn:0.04-0.05 ﹪, Nb:0.02-0.03 ﹪, Ti:0.01-0.02 ﹪, Pr:0.01-0.02 ﹪, surplus be Fe and Inevitable impurity ratio preparation raw material, raw material melting, casting, after demoulding, obtained ingot casting is heat-treated: first will casting Ingot is heated, and is warming up to 750 DEG C, 120 DEG C/h of heating rate, keeps the temperature 3 hours, after be cooled to 600 DEG C, rate of temperature fall 50 DEG C/h, keep the temperature 3 hours, after be cooled to 500 DEG C again, keep the temperature 5 hours, after be air-cooled to room temperature,
Forging: by ingot casting be heated to 1050 DEG C keep the temperature 4 hours, after forged, 1050 DEG C of starting forging temperature, final forging temperature 870 DEG C,
Rolling: the blank after forging being heated, 1030 DEG C of heating temperature, and split rolling method uses 6 passages, road when cogging 11%, mill speed control slab after 10mm/s, cogging is kept the temperature at 820 DEG C for secondary opposite reduction ratio control, when heat preservation Between 4 hours, after be warming up to 1050 DEG C, soaking time was controlled at 3 hours, then carried out hot rolling, 9 passage of hot rolling, breaking down to blanket Passage is controlled with respect to reduction ratio 15% with respect to reduction ratio 7%, other passages, and mill speed is controlled in 30mm/s, finishing temperature At 850 DEG C；Room temperature is air-cooled to after rolling,
Machining: plate being machined out and opens up out oil groove and oilhole,
Curling: being curled into semicircle for plate,
Heat treatment: being warming up to 950 DEG C for workpiece, 100 DEG C/h of heating rate, keep the temperature 5 hours, later water hardening, then Secondary heating green body keeps the temperature 3 hours at 700 DEG C, comes out of the stove and is air-cooled to room temperature；Green body is put into subzero treatment 10 minutes in liquid nitrogen, in sky Room temperature is gone back up in gas；
Carbo-nitriding: workpiece semi-cylindrical inner surface and semi-cylindrical outer surface are carried out at carbo-nitriding heat after heat treatment Reason, seep process by force: 950-980 DEG C of range of temperature, carbon potential and nitrogen gesture take level Four step, carbon potential 1.2-1.4%, nitrogen gesture 0.4- 0.6%, 3h is kept the temperature, carbon potential is then reduced and increases nitrogen gesture to 1.0-1.1% and keep the temperature 3h to 0.7-0.9%, then reduce carbon potential to 0.7- 0.9%, nitrogen gesture is increased to 1.0-1.1%, is kept the temperature 4h, is finally reduced carbon potential to 0.4-0.5%, increase nitrogen gesture to 1.2-1.6%, heat preservation 4h；Be diffused after strong infiltration, diffusion process: control furnace temperature is down to 930 DEG C, keeps the temperature 3h, is cooled to 870 DEG C, keeps the temperature 4h, diffusion Process carbon-potential control is between 0.9-1.0%, and nitrogen potential control is between 1.1-1.2%；It is air-cooled to room temperature；
Built-up welding: built-up welding, bead-welding technology are carried out to workpiece semi-cylindrical outer surface after carbo-nitriding are as follows: 230 DEG C of preheatings, built-up welding When, electric current 65A, voltage 12V, built-up welding speed are 8mm/s, and argon flow 12L/min, overlay cladding is with a thickness of 2mm；, heap Slow cooling after the completion of weldering；Weld overlay materials are as follows: Ni 4-5%, Al 2-3%, Mo 1-2%, Fe 1-2%, Zn 0.8-0.9%, Sn 0.2-0.3%, C 0.2-0.3%, surplus Cu；
Oil groove coating: in oil groove groove body surface shelling-out of titanium carbide coating, coating layer thickness 0.4mm,
Built-up welding: in the bearing shell semi-cylindrical other than workpiece degreasing tank groove body surface after being coated to workpiece oil groove groove body surface Surface carries out built-up welding, bead-welding technology are as follows: and 170 DEG C of preheatings, when built-up welding, electric current 60A, voltage 12V, built-up welding speed are 8mm/s, Argon flow is 9L/min, and overlay cladding is with a thickness of 2mm；, Slow cooling after the completion of built-up welding；Weld overlay materials are as follows: Zn 6-7%, Cr 4-5%, Cu 1-2%, Ti 0.6-0.7%, Mn 0.3-0.4%, Si 0.2-0.3%, Nb 0.03-0.04%, surplus Al；
Final heat treatment: being heated to 650 DEG C for workpiece and keep the temperature 4 hours, then is cooled to 400 DEG C and keeps the temperature 2 hours, obtains final Bearing shell.
A kind of motor bearing, other than after the coating of workpiece oil groove groove body surface to workpiece degreasing tank groove body surface Bearing shell semi-cylindrical inner surface carries out built-up welding, bead-welding technology are as follows: 170 DEG C of preheatings, when built-up welding, and electric current 60A, voltage 12V, heap Weldering speed degree is 8mm/s, and argon flow 9L/min, overlay cladding is with a thickness of 2mm；, Slow cooling after the completion of built-up welding；Weld overlay materials Are as follows: Zn 6%, Cr 4%, Cu 1%, Ti 0.6%, Mn 0.3%, Si 0.2%, Nb 0.03%, surplus Al.
A kind of motor bearing, other than after the coating of workpiece oil groove groove body surface to workpiece degreasing tank groove body surface Bearing shell semi-cylindrical inner surface carries out built-up welding, bead-welding technology are as follows: 170 DEG C of preheatings, when built-up welding, and electric current 60A, voltage 12V, heap Weldering speed degree is 8mm/s, and argon flow 9L/min, overlay cladding is with a thickness of 2mm；, Slow cooling after the completion of built-up welding；Weld overlay materials Are as follows: Zn 7%, Cr 5%, Cu 2%, Ti 0.7%, Mn 0.4%, Si 0.3%, Nb 0.04%, surplus Al.
A kind of motor bearing, other than after the coating of workpiece oil groove groove body surface to workpiece degreasing tank groove body surface Bearing shell semi-cylindrical inner surface carries out built-up welding, bead-welding technology are as follows: 170 DEG C of preheatings, when built-up welding, and electric current 60A, voltage 12V, heap Weldering speed degree is 8mm/s, and argon flow 9L/min, overlay cladding is with a thickness of 2mm；, Slow cooling after the completion of built-up welding；Weld overlay materials Are as follows: Zn 7%, Cr 5%, Cu 2%, Ti 0.7%, Mn 0.4%, Si 0.3%, Nb 0.04%, surplus Al.
Oil groove groove body section at semicircle or rectangle,
The carbo-nitriding carried out to bearing shell semi-cylindrical the inner surface and the outer surface also includes semi-cylindrical inner surface oil groove slot Body surface face.
The beneficial effect of foregoing invention content compared with the existing technology is: 1) by carrying out to shaft sleeve oil groove groove body surface Applying coating improves groove body corrosion resistance；2) intensity that ferrous alloy material of the present invention sufficiently meets bearing shell material of main part is wanted It asks；3) hardness and intensity fatigue behaviour that 4 grades of gradient carbo-nitriding heat treatments improve bearing shell are carried out to bearing shell, avoids the occurrence of and splits Line；4) it is handled by inner surface of bearing bush built-up welding so that axle sleeve reaches higher wearability and fatigue performance, corresponding fatigability It can also be improved；5) by carrying out built-up welding to bearing shell outer surface, anti-corrosion, the high temperature resistant of material are improved.6) bearing shell carries out deep cooling Processing improves its impact resistance and fatigue behaviour.
Detailed description of the invention
Fig. 1 is bearing shell front view；
Fig. 2 is bearing shell top view.
Specific embodiment
For a clearer understanding of the technical characteristics, objects and effects of the present invention, what now the present invention will be described in detail Specific embodiment.
Motor bearing as shown in Figs. 1-2, the bearing shell are in tiles semi-cylindrical, and bearing shell semi-cylindrical inner surface offers cross It to oil groove groove body (1), is offered on the oil groove oilhole (2), oil groove groove body surface is coated with titanium carbide coating and (does not show in figure Out), the bearing shell semi-cylindrical inner surface other than degreasing tank groove body surface has aluminium alloy overlay cladding (3), outside bearing shell semi-cylindrical Surface has copper alloy overlay cladding (4).
Embodiment 1
A kind of motor bearing: the bearing shell is in tiles semi-cylindrical, and bearing shell semi-cylindrical inner surface offers lateral oil groove, Oilhole is offered on the oil groove, oil groove groove body surface is coated with titanium carbide coating, the bearing shell other than degreasing tank groove body surface Semi-cylindrical inner surface has aluminium alloy overlay cladding, and bearing shell semi-cylindrical outer surface has copper alloy overlay cladding,
It is characterized by: bearing shell preparation method: the following steps are included: according to: C:0.3 ﹪, Si:4 ﹪, Ni:2 ﹪, Cr 1 ﹪, Co:0.7 ﹪, Al:0.5 ﹪, W:0.2 ﹪, Cu:0.08 ﹪, Mg:0.07 ﹪, Zn:0.04 ﹪, Nb:0.02 ﹪, Ti: 0.01 ﹪, Pr:0.01 ﹪, surplus are Fe and inevitable impurity ratio preparation raw material, and raw material melting, casting after demoulding, obtain To ingot casting be heat-treated: ingot casting is heated first, is warming up to 750 DEG C, 120 DEG C/h of heating rate, heat preservation 3 is small When, after be cooled to 600 DEG C, 50 DEG C/h of rate of temperature fall, keep the temperature 3 hours, after be cooled to 500 DEG C again, keep the temperature 5 hours, it is rear empty It is cooled to room temperature,
Forging: by ingot casting be heated to 1050 DEG C keep the temperature 4 hours, after forged, 1050 DEG C of starting forging temperature, final forging temperature 870 DEG C,
Rolling: the blank after forging being heated, 1030 DEG C of heating temperature, and split rolling method uses 6 passages, road when cogging 11%, mill speed control slab after 10mm/s, cogging is kept the temperature at 820 DEG C for secondary opposite reduction ratio control, when heat preservation Between 4 hours, after be warming up to 1050 DEG C, soaking time was controlled at 3 hours, then carried out hot rolling, 9 passage of hot rolling, breaking down to blanket Passage is controlled with respect to reduction ratio 15% with respect to reduction ratio 7%, other passages, and mill speed is controlled in 30mm/s, finishing temperature At 850 DEG C；Room temperature is air-cooled to after rolling,
Machining: plate being machined out and opens up out oil groove and oilhole,
Curling: being curled into semicircle for plate,
Heat treatment: being warming up to 950 DEG C for workpiece, 100 DEG C/h of heating rate, keep the temperature 5 hours, later water hardening, then Secondary heating green body keeps the temperature 3 hours at 700 DEG C, comes out of the stove and is air-cooled to room temperature；Green body is put into subzero treatment 10 minutes in liquid nitrogen, in sky Room temperature is gone back up in gas；
Carbo-nitriding: workpiece semi-cylindrical inner surface and semi-cylindrical outer surface are carried out at carbo-nitriding heat after heat treatment Reason, seep process by force: 950-980 DEG C of range of temperature, carbon potential and nitrogen gesture take level Four step, carbon potential 1.2-1.4%, nitrogen gesture 0.4- 0.6%, 3h is kept the temperature, carbon potential is then reduced and increases nitrogen gesture to 1.0-1.1% and keep the temperature 3h to 0.7-0.9%, then reduce carbon potential to 0.7- 0.9%, nitrogen gesture is increased to 1.0-1.1%, is kept the temperature 4h, is finally reduced carbon potential to 0.4-0.5%, increase nitrogen gesture to 1.2-1.6%, heat preservation 4h；Be diffused after strong infiltration, diffusion process: control furnace temperature is down to 930 DEG C, keeps the temperature 3h, is cooled to 870 DEG C, keeps the temperature 4h, diffusion Process carbon-potential control is between 0.9-1.0%, and nitrogen potential control is between 1.1-1.2%；It is air-cooled to room temperature；
Built-up welding: built-up welding, bead-welding technology are carried out to workpiece semi-cylindrical outer surface after carbo-nitriding are as follows: 230 DEG C of preheatings, built-up welding When, electric current 65A, voltage 12V, built-up welding speed are 8mm/s, and argon flow 12L/min, overlay cladding is with a thickness of 2mm；, heap Slow cooling after the completion of weldering；Weld overlay materials are as follows: Ni 4%, Al 2%, Mo 1%, Fe 1%, Zn 0.8%, Sn 0.2%, C 0.2%, Surplus is Cu；
Oil groove coating: in oil groove groove body surface shelling-out of titanium carbide coating, coating layer thickness 0.4mm,
Built-up welding: in the bearing shell semi-cylindrical other than workpiece degreasing tank groove body surface after being coated to workpiece oil groove groove body surface Surface carries out built-up welding, bead-welding technology are as follows: and 170 DEG C of preheatings, when built-up welding, electric current 60A, voltage 12V, built-up welding speed are 8mm/s, Argon flow is 9L/min, and overlay cladding is with a thickness of 2mm；, Slow cooling after the completion of built-up welding；Weld overlay materials are as follows: Zn 6%, Cr 4%, Cu 1%, Ti 0.6%, Mn 0.3%, Si 0.2%, Nb 0.03%, surplus Al；
Final heat treatment: being heated to 650 DEG C for workpiece and keep the temperature 4 hours, then is cooled to 400 DEG C and keeps the temperature 2 hours, obtains final Bearing shell.
Embodiment 2
A kind of motor bearing: the bearing shell is in tiles semi-cylindrical, and bearing shell semi-cylindrical inner surface offers lateral oil groove, Oilhole is offered on the oil groove, oil groove groove body surface is coated with titanium carbide coating, the bearing shell other than degreasing tank groove body surface Semi-cylindrical inner surface has aluminium alloy overlay cladding, and bearing shell semi-cylindrical outer surface has copper alloy overlay cladding,
It is characterized by: bearing shell preparation method: the following steps are included: according to: C:0.4 ﹪, Si:5 ﹪, Ni:3 ﹪, Cr 2 ﹪, Co:0.8 ﹪, Al:0.6 ﹪, W:0.3 ﹪, Cu:0.09 ﹪, Mg:0.08 ﹪, Zn:0.05 ﹪, Nb:0.03 ﹪, Ti:0.02 ﹪, Pr:0.02 ﹪, surplus are Fe and inevitable impurity ratio preparation raw material, raw material melting, casting, demoulding Afterwards, the ingot casting obtained is heat-treated: first being heated ingot casting, is warming up to 750 DEG C, 120 DEG C/h of heating rate, protects Temperature 3 hours, after be cooled to 600 DEG C, 50 DEG C/h of rate of temperature fall, keep the temperature 3 hours, after be cooled to 500 DEG C again, heat preservation 5 is small When, after be air-cooled to room temperature,
Forging: by ingot casting be heated to 1050 DEG C keep the temperature 4 hours, after forged, 1050 DEG C of starting forging temperature, final forging temperature 870 DEG C,
Rolling: the blank after forging being heated, 1030 DEG C of heating temperature, and split rolling method uses 6 passages, road when cogging 11%, mill speed control slab after 10mm/s, cogging is kept the temperature at 820 DEG C for secondary opposite reduction ratio control, when heat preservation Between 4 hours, after be warming up to 1050 DEG C, soaking time was controlled at 3 hours, then carried out hot rolling, 9 passage of hot rolling, breaking down to blanket Passage is controlled with respect to reduction ratio 15% with respect to reduction ratio 7%, other passages, and mill speed is controlled in 30mm/s, finishing temperature At 850 DEG C；Room temperature is air-cooled to after rolling,
Machining: plate being machined out and opens up out oil groove and oilhole,
Curling: being curled into semicircle for plate,
Heat treatment: being warming up to 950 DEG C for workpiece, 100 DEG C/h of heating rate, keep the temperature 5 hours, later water hardening, then Secondary heating green body keeps the temperature 3 hours at 700 DEG C, comes out of the stove and is air-cooled to room temperature；Green body is put into subzero treatment 10 minutes in liquid nitrogen, in sky Room temperature is gone back up in gas；
Carbo-nitriding: workpiece semi-cylindrical inner surface and semi-cylindrical outer surface are carried out at carbo-nitriding heat after heat treatment Reason, seep process by force: 950-980 DEG C of range of temperature, carbon potential and nitrogen gesture take level Four step, carbon potential 1.2-1.4%, nitrogen gesture 0.4- 0.6%, 3h is kept the temperature, carbon potential is then reduced and increases nitrogen gesture to 1.0-1.1% and keep the temperature 3h to 0.7-0.9%, then reduce carbon potential to 0.7- 0.9%, nitrogen gesture is increased to 1.0-1.1%, is kept the temperature 4h, is finally reduced carbon potential to 0.4-0.5%, increase nitrogen gesture to 1.2-1.6%, heat preservation 4h；Be diffused after strong infiltration, diffusion process: control furnace temperature is down to 930 DEG C, keeps the temperature 3h, is cooled to 870 DEG C, keeps the temperature 4h, diffusion Process carbon-potential control is between 0.9-1.0%, and nitrogen potential control is between 1.1-1.2%；It is air-cooled to room temperature；
Built-up welding: built-up welding, bead-welding technology are carried out to workpiece semi-cylindrical outer surface after carbo-nitriding are as follows: 230 DEG C of preheatings, built-up welding When, electric current 65A, voltage 12V, built-up welding speed are 8mm/s, and argon flow 12L/min, overlay cladding is with a thickness of 2mm；, heap Slow cooling after the completion of weldering；Weld overlay materials are as follows: Ni 5%, Al 3%, Mo 2%, Fe 2%, Zn 0.9%, Sn 0.3%, C 0.3%, Surplus is Cu；
Oil groove coating: in oil groove groove body surface shelling-out of titanium carbide coating, coating layer thickness 0.4mm,
Built-up welding: in the bearing shell semi-cylindrical other than workpiece degreasing tank groove body surface after being coated to workpiece oil groove groove body surface Surface carries out built-up welding, bead-welding technology are as follows: and 170 DEG C of preheatings, when built-up welding, electric current 60A, voltage 12V, built-up welding speed are 8mm/s, Argon flow is 9L/min, and overlay cladding is with a thickness of 2mm；, Slow cooling after the completion of built-up welding；Weld overlay materials are as follows: Zn 7%, Cr 5%, Cu 2%, Ti 0.7%, Mn 0.4%, Si 0.3%, Nb 0.04%, surplus Al；
Final heat treatment: being heated to 650 DEG C for workpiece and keep the temperature 4 hours, then is cooled to 400 DEG C and keeps the temperature 2 hours, obtains final Bearing shell.
Embodiment 3
A kind of motor bearing: the bearing shell is in tiles semi-cylindrical, and bearing shell semi-cylindrical inner surface offers lateral oil groove, Oilhole is offered on the oil groove, oil groove groove body surface is coated with titanium carbide coating, the bearing shell other than degreasing tank groove body surface Semi-cylindrical inner surface has aluminium alloy overlay cladding, and bearing shell semi-cylindrical outer surface has copper alloy overlay cladding,
It is characterized by: bearing shell preparation method: the following steps are included: according to: C:0.35 ﹪, Si:4.5 ﹪, Ni:2.5 ﹪, Cr 1.5 ﹪, Co:0.75 ﹪, Al:0.55 ﹪, W:0.25 ﹪, Cu:0.085 ﹪, Mg:0.075 ﹪, Zn:0.045 ﹪, Nb: 0.025 ﹪, Ti:0.015 ﹪, Pr:0.015 ﹪, surplus be Fe and inevitable impurity ratio preparation raw material, raw material melting, Casting, after demoulding, obtained ingot casting is heat-treated: first being heated ingot casting, is warming up to 750 DEG C, heating rate 120 DEG C/h, keep the temperature 3 hours, after be cooled to 600 DEG C, 50 DEG C/h of rate of temperature fall, keep the temperature 3 hours, after be cooled to 500 again DEG C, keep the temperature 5 hours, after be air-cooled to room temperature,
Forging: by ingot casting be heated to 1050 DEG C keep the temperature 4 hours, after forged, 1050 DEG C of starting forging temperature, final forging temperature 870 DEG C,
Rolling: the blank after forging being heated, 1030 DEG C of heating temperature, and split rolling method uses 6 passages, road when cogging 11%, mill speed control slab after 10mm/s, cogging is kept the temperature at 820 DEG C for secondary opposite reduction ratio control, when heat preservation Between 4 hours, after be warming up to 1050 DEG C, soaking time was controlled at 3 hours, then carried out hot rolling, 9 passage of hot rolling, breaking down to blanket Passage is controlled with respect to reduction ratio 15% with respect to reduction ratio 7%, other passages, and mill speed is controlled in 30mm/s, finishing temperature At 850 DEG C；Room temperature is air-cooled to after rolling,
Machining: plate being machined out and opens up out oil groove and oilhole,
Curling: being curled into semicircle for plate,
Heat treatment: being warming up to 950 DEG C for workpiece, 100 DEG C/h of heating rate, keep the temperature 5 hours, later water hardening, then Secondary heating green body keeps the temperature 3 hours at 700 DEG C, comes out of the stove and is air-cooled to room temperature；Green body is put into subzero treatment 10 minutes in liquid nitrogen, in sky Room temperature is gone back up in gas；
Carbo-nitriding: workpiece semi-cylindrical inner surface and semi-cylindrical outer surface are carried out at carbo-nitriding heat after heat treatment Reason, seep process by force: 950-980 DEG C of range of temperature, carbon potential and nitrogen gesture take level Four step, carbon potential 1.2-1.4%, nitrogen gesture 0.4- 0.6%, 3h is kept the temperature, carbon potential is then reduced and increases nitrogen gesture to 1.0-1.1% and keep the temperature 3h to 0.7-0.9%, then reduce carbon potential to 0.7- 0.9%, nitrogen gesture is increased to 1.0-1.1%, is kept the temperature 4h, is finally reduced carbon potential to 0.4-0.5%, increase nitrogen gesture to 1.2-1.6%, heat preservation 4h；Be diffused after strong infiltration, diffusion process: control furnace temperature is down to 930 DEG C, keeps the temperature 3h, is cooled to 870 DEG C, keeps the temperature 4h, diffusion Process carbon-potential control is between 0.9-1.0%, and nitrogen potential control is between 1.1-1.2%；It is air-cooled to room temperature；
Built-up welding: built-up welding, bead-welding technology are carried out to workpiece semi-cylindrical outer surface after carbo-nitriding are as follows: 230 DEG C of preheatings, built-up welding When, electric current 65A, voltage 12V, built-up welding speed are 8mm/s, and argon flow 12L/min, overlay cladding is with a thickness of 2mm；, heap Slow cooling after the completion of weldering；Weld overlay materials are as follows: Ni 4.5%, Al 2.5%, Mo 1.5%, Fe 1.5%, Zn 0.85%, Sn 0.25%, C 0.25%, surplus Cu；
Oil groove coating: in oil groove groove body surface shelling-out of titanium carbide coating, coating layer thickness 0.4mm,
Built-up welding: in the bearing shell semi-cylindrical other than workpiece degreasing tank groove body surface after being coated to workpiece oil groove groove body surface Surface carries out built-up welding, bead-welding technology are as follows: and 170 DEG C of preheatings, when built-up welding, electric current 60A, voltage 12V, built-up welding speed are 8mm/s, Argon flow is 9L/min, and overlay cladding is with a thickness of 2mm；, Slow cooling after the completion of built-up welding；Weld overlay materials are as follows: Zn 6.5%, Cr 4.5%, Cu 1.5%, Ti 0.65%, Mn 0.35%, Si 0.25%, Nb 0.035%, surplus Al；
Final heat treatment: being heated to 650 DEG C for workpiece and keep the temperature 4 hours, then is cooled to 400 DEG C and keeps the temperature 2 hours, obtains final Bearing shell.
Embodiment 4
A kind of motor bearing: the bearing shell is in tiles semi-cylindrical, and bearing shell semi-cylindrical inner surface offers lateral oil groove, Oilhole is offered on the oil groove, oil groove groove body surface is coated with titanium carbide coating, the bearing shell other than degreasing tank groove body surface Semi-cylindrical inner surface has aluminium alloy overlay cladding, and bearing shell semi-cylindrical outer surface has copper alloy overlay cladding,
It is characterized by: bearing shell preparation method: the following steps are included: according to: C:0.34 ﹪, Si:4.2 ﹪, Ni:2.2 ﹪, Cr 1.4 ﹪, Co:0.73 ﹪, Al:0.52 ﹪, W:0.23 ﹪, Cu:0.083 ﹪, Mg:0.074 ﹪, Zn:0.042 ﹪, Nb: 0.023 ﹪, Ti:0.013 ﹪, Pr:0.012 ﹪, surplus be Fe and inevitable impurity ratio preparation raw material, raw material melting, Casting, after demoulding, obtained ingot casting is heat-treated: first being heated ingot casting, is warming up to 750 DEG C, heating rate 120 DEG C/h, keep the temperature 3 hours, after be cooled to 600 DEG C, 50 DEG C/h of rate of temperature fall, keep the temperature 3 hours, after be cooled to 500 again DEG C, keep the temperature 5 hours, after be air-cooled to room temperature,
Forging: by ingot casting be heated to 1050 DEG C keep the temperature 4 hours, after forged, 1050 DEG C of starting forging temperature, final forging temperature 870 DEG C,
Rolling: the blank after forging being heated, 1030 DEG C of heating temperature, and split rolling method uses 6 passages, road when cogging 11%, mill speed control slab after 10mm/s, cogging is kept the temperature at 820 DEG C for secondary opposite reduction ratio control, when heat preservation Between 4 hours, after be warming up to 1050 DEG C, soaking time was controlled at 3 hours, then carried out hot rolling, 9 passage of hot rolling, breaking down to blanket Passage is controlled with respect to reduction ratio 15% with respect to reduction ratio 7%, other passages, and mill speed is controlled in 30mm/s, finishing temperature At 850 DEG C；Room temperature is air-cooled to after rolling,
Machining: plate being machined out and opens up out oil groove and oilhole,
Curling: being curled into semicircle for plate,
Heat treatment: being warming up to 950 DEG C for workpiece, 100 DEG C/h of heating rate, keep the temperature 5 hours, later water hardening, then Secondary heating green body keeps the temperature 3 hours at 700 DEG C, comes out of the stove and is air-cooled to room temperature；Green body is put into subzero treatment 10 minutes in liquid nitrogen, in sky Room temperature is gone back up in gas；
Carbo-nitriding: workpiece semi-cylindrical inner surface and semi-cylindrical outer surface are carried out at carbo-nitriding heat after heat treatment Reason, seep process by force: 950-980 DEG C of range of temperature, carbon potential and nitrogen gesture take level Four step, carbon potential 1.2-1.4%, nitrogen gesture 0.4- 0.6%, 3h is kept the temperature, carbon potential is then reduced and increases nitrogen gesture to 1.0-1.1% and keep the temperature 3h to 0.7-0.9%, then reduce carbon potential to 0.7- 0.9%, nitrogen gesture is increased to 1.0-1.1%, is kept the temperature 4h, is finally reduced carbon potential to 0.4-0.5%, increase nitrogen gesture to 1.2-1.6%, heat preservation 4h；Be diffused after strong infiltration, diffusion process: control furnace temperature is down to 930 DEG C, keeps the temperature 3h, is cooled to 870 DEG C, keeps the temperature 4h, diffusion Process carbon-potential control is between 0.9-1.0%, and nitrogen potential control is between 1.1-1.2%；It is air-cooled to room temperature；
Built-up welding: built-up welding, bead-welding technology are carried out to workpiece semi-cylindrical outer surface after carbo-nitriding are as follows: 230 DEG C of preheatings, built-up welding When, electric current 65A, voltage 12V, built-up welding speed are 8mm/s, and argon flow 12L/min, overlay cladding is with a thickness of 2mm；, heap Slow cooling after the completion of weldering；Weld overlay materials are as follows: Ni 4.1%, Al 2.2%, Mo 1.1%, Fe 1.2%, Zn 0.84%, Sn 0.23%, C 0.22%, surplus Cu；
Oil groove coating: in oil groove groove body surface shelling-out of titanium carbide coating, coating layer thickness 0.4mm,
Built-up welding: in the bearing shell semi-cylindrical other than workpiece degreasing tank groove body surface after being coated to workpiece oil groove groove body surface Surface carries out built-up welding, bead-welding technology are as follows: and 170 DEG C of preheatings, when built-up welding, electric current 60A, voltage 12V, built-up welding speed are 8mm/s, Argon flow is 9L/min, and overlay cladding is with a thickness of 2mm；, Slow cooling after the completion of built-up welding；Weld overlay materials are as follows: Zn 6.3%, Cr 4.4%, Cu 1.3%, Ti 0.62%, Mn 0.34%, Si 0.23%, Nb 0.034%, surplus Al；
Final heat treatment: being heated to 650 DEG C for workpiece and keep the temperature 4 hours, then is cooled to 400 DEG C and keeps the temperature 2 hours, obtains final Bearing shell.
Embodiment 5
A kind of motor bearing: the bearing shell is in tiles semi-cylindrical, and bearing shell semi-cylindrical inner surface offers lateral oil groove, Oilhole is offered on the oil groove, oil groove groove body surface is coated with titanium carbide coating, the bearing shell other than degreasing tank groove body surface Semi-cylindrical inner surface has aluminium alloy overlay cladding, and bearing shell semi-cylindrical outer surface has copper alloy overlay cladding,
It is characterized by: bearing shell preparation method: the following steps are included: according to: C:0.37 ﹪, Si:4.7 ﹪, Ni:2.8 ﹪, Cr 1.9 ﹪, Co:0.76 ﹪, Al:0.57 ﹪, W:0.28 ﹪, Cu:0.089 ﹪, Mg:0.078 ﹪, Zn:0.047 ﹪, Nb: 0.026 ﹪, Ti:0.017 ﹪, Pr:0.018 ﹪, surplus be Fe and inevitable impurity ratio preparation raw material, raw material melting, Casting, after demoulding, obtained ingot casting is heat-treated: first being heated ingot casting, is warming up to 750 DEG C, heating rate 120 DEG C/h, keep the temperature 3 hours, after be cooled to 600 DEG C, 50 DEG C/h of rate of temperature fall, keep the temperature 3 hours, after be cooled to 500 again DEG C, keep the temperature 5 hours, after be air-cooled to room temperature,
Forging: by ingot casting be heated to 1050 DEG C keep the temperature 4 hours, after forged, 1050 DEG C of starting forging temperature, final forging temperature 870 DEG C,
Rolling: the blank after forging being heated, 1030 DEG C of heating temperature, and split rolling method uses 6 passages, road when cogging 11%, mill speed control slab after 10mm/s, cogging is kept the temperature at 820 DEG C for secondary opposite reduction ratio control, when heat preservation Between 4 hours, after be warming up to 1050 DEG C, soaking time was controlled at 3 hours, then carried out hot rolling, 9 passage of hot rolling, breaking down to blanket Passage is controlled with respect to reduction ratio 15% with respect to reduction ratio 7%, other passages, and mill speed is controlled in 30mm/s, finishing temperature At 850 DEG C；Room temperature is air-cooled to after rolling,
Machining: plate being machined out and opens up out oil groove and oilhole,
Curling: being curled into semicircle for plate,
Heat treatment: being warming up to 950 DEG C for workpiece, 100 DEG C/h of heating rate, keep the temperature 5 hours, later water hardening, then Secondary heating green body keeps the temperature 3 hours at 700 DEG C, comes out of the stove and is air-cooled to room temperature；Green body is put into subzero treatment 10 minutes in liquid nitrogen, in sky Room temperature is gone back up in gas；
Carbo-nitriding: workpiece semi-cylindrical inner surface and semi-cylindrical outer surface are carried out at carbo-nitriding heat after heat treatment Reason, seep process by force: 950-980 DEG C of range of temperature, carbon potential and nitrogen gesture take level Four step, carbon potential 1.2-1.4%, nitrogen gesture 0.4- 0.6%, 3h is kept the temperature, carbon potential is then reduced and increases nitrogen gesture to 1.0-1.1% and keep the temperature 3h to 0.7-0.9%, then reduce carbon potential to 0.7- 0.9%, nitrogen gesture is increased to 1.0-1.1%, is kept the temperature 4h, is finally reduced carbon potential to 0.4-0.5%, increase nitrogen gesture to 1.2-1.6%, heat preservation 4h；Be diffused after strong infiltration, diffusion process: control furnace temperature is down to 930 DEG C, keeps the temperature 3h, is cooled to 870 DEG C, keeps the temperature 4h, diffusion Process carbon-potential control is between 0.9-1.0%, and nitrogen potential control is between 1.1-1.2%；It is air-cooled to room temperature；
Built-up welding: built-up welding, bead-welding technology are carried out to workpiece semi-cylindrical outer surface after carbo-nitriding are as follows: 230 DEG C of preheatings, built-up welding When, electric current 65A, voltage 12V, built-up welding speed are 8mm/s, and argon flow 12L/min, overlay cladding is with a thickness of 2mm；, heap Slow cooling after the completion of weldering；Weld overlay materials are as follows: Ni 4.7%, Al 2.8%, Mo 1.9%, Fe 1.7%, Zn 0.88%, Sn 0.27%, C 0.26%, surplus Cu；
Oil groove coating: in oil groove groove body surface shelling-out of titanium carbide coating, coating layer thickness 0.4mm,
Built-up welding: in the bearing shell semi-cylindrical other than workpiece degreasing tank groove body surface after being coated to workpiece oil groove groove body surface Surface carries out built-up welding, bead-welding technology are as follows: and 170 DEG C of preheatings, when built-up welding, electric current 60A, voltage 12V, built-up welding speed are 8mm/s, Argon flow is 9L/min, and overlay cladding is with a thickness of 2mm；, Slow cooling after the completion of built-up welding；Weld overlay materials are as follows: Zn 6.7%, Cr 4.8%, Cu 1.9%, Ti 0.66%, Mn 0.36%, Si 0.27%, Nb 0.036%, surplus Al；
Final heat treatment: being heated to 650 DEG C for workpiece and keep the temperature 4 hours, then is cooled to 400 DEG C and keeps the temperature 2 hours, obtains final Bearing shell.

Claims (1)

1. a kind of motor bearing manufacturing method, the bearing shell is in tiles semi-cylindrical, and bearing shell semi-cylindrical inner surface offers cross To oil groove, oilhole is offered on the oil groove, oil groove groove body surface is coated with titanium carbide coating, other than degreasing tank groove body surface Bearing shell semi-cylindrical inner surface have aluminium alloy overlay cladding, bearing shell semi-cylindrical outer surface have copper alloy overlay cladding,
It is characterized by: bearing shell preparation method: the following steps are included: according to: C:0.3-0.4 ﹪, Si:4-5 ﹪, Ni:2-3 ﹪, Cr 1-2 ﹪, Co:0.7-0.8 ﹪, Al:0.5-0.6 ﹪, W:0.2-0.3 ﹪, Cu:0.08-0.09 ﹪, Mg:0.07-0.08 ﹪, Zn:0.04-0.05 ﹪, Nb:0.02-0.03 ﹪, Ti:0.01-0.02 ﹪, Pr:0.01-0.02 ﹪, surplus are Fe and can not keep away The impurity ratio preparation raw material exempted from, raw material melting, casting, after demoulding, obtained ingot casting is heat-treated: first carrying out ingot casting Heating, is warming up to 750 DEG C, 120 DEG C/h of heating rate, keeps the temperature 3 hours, after be cooled to 600 DEG C, 50 DEG C of rate of temperature fall/small When, keep the temperature 3 hours, after be cooled to 500 DEG C again, keep the temperature 5 hours, after be air-cooled to room temperature,
Forging: by ingot casting be heated to 1050 DEG C keep the temperature 4 hours, after forged, 1050 DEG C of starting forging temperature, 870 DEG C of final forging temperature,
Rolling: the blank after forging being heated, 1030 DEG C of heating temperature, and split rolling method uses 6 passages, passage phase when cogging To reduction ratio control 11%, mill speed control slab after 10mm/s, cogging is kept the temperature at 820 DEG C, and soaking time 4 is small When, after be warming up to 1050 DEG C, soaking time was controlled at 3 hours, then carried out hot rolling, 9 passage of hot rolling, bloom pass phase to blanket To reduction ratio 7%, other passages are controlled with respect to reduction ratio 15%, and mill speed is controlled in 30mm/s, and finishing temperature is 850 ℃；Room temperature is air-cooled to after rolling,
Machining: plate being machined out and opens up out oil groove and oilhole,
Curling: being curled into semicircle for plate,
Heat treatment: being warming up to 950 DEG C for workpiece, 100 DEG C/h of heating rate, keeps the temperature 5 hours, later water hardening, again plus Hot green body keeps the temperature 3 hours at 700 DEG C, comes out of the stove and is air-cooled to room temperature；Green body is put into subzero treatment 10 minutes in liquid nitrogen, in air Go back up to room temperature；
Carbo-nitriding: carrying out carbo-nitriding heat treatment to workpiece semi-cylindrical inner surface and semi-cylindrical outer surface after heat treatment, Strong process of seeping: 950-980 DEG C of range of temperature, carbon potential and nitrogen gesture take level Four step, carbon potential 1.2-1.4%, nitrogen gesture 0.4-0.6%, 3h is kept the temperature, then reduces carbon potential to 1.0-1.1%, nitrogen gesture is increased to 0.7-0.9%, keeps the temperature 3h, then reduces carbon potential to 0.7-0.9%, Nitrogen gesture is increased to 1.0-1.1%, 4h is kept the temperature, finally reduces carbon potential to 0.4-0.5%, increase nitrogen gesture to 1.2-1.6%, keep the temperature 4h；By force Be diffused after infiltration, diffusion process: control furnace temperature is down to 930 DEG C, keeps the temperature 3h, is cooled to 870 DEG C, keeps the temperature 4h, diffusion process Carbon-potential control is between 0.9-1.0%, and nitrogen potential control is between 1.1-1.2%；It is air-cooled to room temperature；
Built-up welding: built-up welding, bead-welding technology are carried out to workpiece semi-cylindrical outer surface after carbo-nitriding are as follows: 230 DEG C of preheatings, when built-up welding, Electric current is 65A, voltage 12V, and built-up welding speed is 8mm/s, argon flow 12L/min, and overlay cladding is soldered with a thickness of 2mm, heap At rear Slow cooling；Weld overlay materials are as follows: Ni 4-5%, Al 2-3%, Mo 1-2%, Fe 1-2%, Zn 0.8-0.9%, Sn 0.2- 0.3%, C 0.2-0.3%, surplus Cu；
Oil groove coating: in oil groove groove body surface shelling-out of titanium carbide coating, coating layer thickness 0.4mm,
Built-up welding: to the bearing shell semi-cylindrical inner surface other than workpiece degreasing tank groove body surface after being coated to workpiece oil groove groove body surface Carry out built-up welding, bead-welding technology are as follows: 170 DEG C of preheatings, when built-up welding, electric current 60A, voltage 12V, built-up welding speed are 8mm/s, argon gas Flow is 9L/min, and overlay cladding is with a thickness of 2mm, Slow cooling after the completion of built-up welding；Weld overlay materials are as follows: Zn 6-7%, Cr 4-5%, Cu 1-2%, Ti 0.6-0.7%, Mn 0.3-0.4%, Si 0.2-0.3%, Nb 0.03-0.04%, surplus Al；
Final heat treatment: being heated to 650 DEG C for workpiece and keep the temperature 4 hours, then is cooled to 400 DEG C and keeps the temperature 2 hours, obtains final axis Watt.
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CN106086341A (en) * 2016-08-22 2016-11-09 常州宝隆冶金设备制造有限公司 A kind of method preventing cutter shaft hardening break
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