CN101178094A - Method for preparing steel-copper composite sleeve by spraying cold-pressing mode - Google Patents
Method for preparing steel-copper composite sleeve by spraying cold-pressing mode Download PDFInfo
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- CN101178094A CN101178094A CNA2007101151441A CN200710115144A CN101178094A CN 101178094 A CN101178094 A CN 101178094A CN A2007101151441 A CNA2007101151441 A CN A2007101151441A CN 200710115144 A CN200710115144 A CN 200710115144A CN 101178094 A CN101178094 A CN 101178094A
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Abstract
The invention discloses a steel-copper composite bearing manufacture method with spraying and cold extrusion type, comprising the steps of carrying out cleaning and/or coarseness disposal to the surface of the steel part to be sprayed, spraying nickel aluminium alloy powder on the surface of the steel part after pre-heated under low temperature by oxygen-ethyne sub-sound velocity fire in order to form a bottom layer, spraying copper alloy to form thick copper alloy coat on the base of the bottom layer, pressing the obtained steel-copper composite plate into the cylindrical composite bearing with copper composite layer in the interior and the internal diameter meeting the requirement by cold extrusion method with an oil hydraulic press according to the technical design direction, welding the longitudinal seam of the composite bearing, mechanically processing the shaft sleeve, etc. The method of the invention has the advantages of fast spraying speed, high efficiency, high coat bonding strength, being suitable for cold extrusion forming, low cost, implementing the batch production of the steel-copper composite shaft sleeves, good applicable prospect, etc.
Description
Technical field
The present invention proposes a kind of method for preparing steel-copper composite shaft sleeve, relate in particular to a kind of subsonic speed flame low temperature spraying method that adopts at the thicker Brass coating of steel surface spraying, then cold-press moulding, weld again the method that machining is made steel-copper composite shaft sleeve, belong to the plied timber preparing technical field in the Materials Science and Engineering.
Background technique
Axle sleeve is the component that are widely applied in mechanical manufacturing field such as automobile, motorcycle, Transport Machinery, punching equipment.Conventional axle sleeve generally is to form with the whole car system of monoblock simple brass bar, has consumed a large amount of copper materials, the cost height.Steel-copper composite shaft sleeve that the preparation of employing sintering method is also arranged, but the manufacturing of this composite shaft sleeve needs large scale sintering equipment, and need rotation even in the workpiece processing to guarantee multiple layer, and complex process, technical requirements is higher.
Brass material has good lubricity and decay resistance.Spray lubricity, corrosion resistance and the wear resistance that brass not only can improve part greatly on the carbon steel parts surface, improve working life, can also save a large amount of copper materials simultaneously, reduce production costs, realize purpose with copper take place of steel.Method at carbon-steel parts surface spraying copper coating has electric arc spraying, plasma spraying and flame spraying etc. at present, but the copper coating thickness that this several method obtains is thinner, can not obtain thicker copper coating, therefore be difficult to satisfy the requirement that component have self lubricity and wear resistance; Adopt plasma spraying,,, easily cause alligatoring, be difficult to improve its performance surface texture because the plasma arc temperature is very high although coating and matrix bond are firm.Flame spraying is to use one of comparatively successful surperficial spraying technology, it be with the gaseous combustion liberated heat as thermal source, silk material or the powder of fusing utilized aerodynamic atomization and be ejected into substrate surface form coating.But, adopt conventional oxygen-acetylene flame sprayed coating because flame flow velocity degree is difficult to form the thicker copper coating that satisfies usage requirement on the steel surface slowly.
Effectively spray thicker copper coating on the steel base in order to be implemented in, a feasible approach is the stroke speed that increases substantially molten particles.Employing has the subsonic speed spray gun of High Temperature High Pressure firing chamber and constricting nozzle, spiral mixed gas and jet-absorption type air intake structure with its uniqueness, make it to improve with conventional oxy-acetylene flame device, greatly the combustion efficiency of combustion flame, heat energy is fully utilized, and it is the flying speed of molten particles can be brought up to 300m/s, even higher.Therefore, adopt high-velocity spray and cooperate reasonably powder metallurgy, can be implemented in the thicker copper coating of steel surface recombination.
By retrieval, the relevant high speed oxy-acetylene flame low temperature spraying method that adopts is at the thicker Brass coating of steel surface spraying, then cold-press moulding, weld again machining and make the method that satisfies steel-copper composite shaft sleeve that usability requires and yet there are no report.
Summary of the invention
Deficiency at present existing steel surface spraying technology the object of the present invention is to provide a kind of method for preparing steel-copper composite shaft sleeve in the spraying mode of colding pressing; Specifically be to adopt subsonic speed oxy-acetylene flame low temperature spraying method at the thicker Brass coating of steel surface spraying, then cold-press moulding, weld again machining and make steel-copper composite shaft sleeve.
Experiment confirm: want to improve the deposition of copper alloy particles at material surface, must adopt the high-velocity spray method, make copper alloy particles in accelerating process, obtain higher jet velocity, when adding the high-velocity particles collision matrix or coating surface there is strong shot-peening effect, generally be in compressive stress state in the coating, just help in the thicker coating of steel surface deposition.Therefore, improving the silk material of fusing or the speed of powder particle accelerating impact substrate surface is the key that forms than thick coating.Given this, the key of technical solution of the present invention is to adopt with oxy-acetylene to make the burning flame, with the subsonic speed low temperature spraying method of pressurized air as powder feeding gas, acceleration gas and cooling air, employing has the spray gun and the compression-expanding nozzle of spiral mixed gas and jet-absorption type air intake structure, atomized particle stream is sprayed to workpiece surface with the speed of 250m/s-320m/s, form bond coat and thicker Brass coating; Implement cold-press moulding then, weld again machining and make steel-copper composite shaft sleeve.
Of the present inventionly prepare the method for steel-copper composite shaft sleeve, comprise the steps: in the spraying mode of colding pressing
(1) steel piece surface to be sprayed is implemented to purify and/or roughening treatment, end until steel piece surface non-corroding and oxide layer or the metal surface that manifests light;
(2) with oxy-acetylene flame the steel piece surface after handling is carried out low-temperature prewarming, make its preheating temperature reach 100 ℃～120 ℃;
(3) adopting the steel piece surface spraying nickel alclad alloy powder of oxy-acetylene subsonic speed flame after preheating to form thickness is the bond coat of 0.05mm～0.15mm; Wherein spraying parameter is: oxygen pressure 0.15MPa～0.85MPa, acetylene pressure 0.06MPa～0.12MPa, the pressure 0.3MPa～0.6MPa of pressurized air powder feeding gas, spray distance 120mm～200mm, powder sending quantity 5g/min～25g/min, 70 °～85 ° of spray angles;
(4) adopting oxy-acetylene subsonic speed flame to spray Cuprum alloy formation thickness on steel piece surface bond coat basis is the brass alloys coating of 2mm～3mm; Wherein spraying parameter is: oxygen pressure 0.40MPa～0.96MPa, acetylene pressure 0.06MPa～0.15MPa, pressure 0.3MPa～the 0.6MPa of pressurized air powder feeding gas, spray distance 100mm～200mm, powder sending quantity 35g/min～65g/min, 70 °～86 ° of spray angles, spraying method repeats to spray 2～5 times continuously;
(5) thickness and the uniformity of detection brass alloys coating; Get the steel-copper complex laminate that meets technical requirements, its copper alloy coating surface of grinding makes it bright and clean, and is standby;
(6) by the art designs direction steel-copper complex laminate of step (5) being pressed into the multiple layer of brass with the method for colding pressing with 25 tons～50 tons oil hydraulic presses is the cylindrical shape composite shaft sleeve of designing requirement at interior, internal diameter;
(7) adopt shielded metal arc welding that the cylindrical shape composite shaft sleeve longitudinal joint of step (6) is welded, process parameter is: welding current 90A～130A, weldingvoltage 24V～26V, welding speed 0.4cm/min～0.6cm/min;
(8) the cylindrical shape composite shaft sleeve that adopts machining process that step (7) is made reaches the size requirement of sleeve length, internal diameter and the external diameter of design, gets steel-copper composite shaft sleeve finished product.
In the above-mentioned method for preparing steel-copper composite shaft sleeve in the spraying mode of colding pressing: the described method for treatment of purifying of step (1) is to adopt sandblast or ball blasting method that the corrosion and the oxide layer of steel piece surface are thoroughly cleared up; Coarsing processing method is with hand operated grinding wheel steel piece surface to be polished until the metal surface that manifests light.
Wherein: described sandblast is to be 15～40 purpose Emery grains or silica sands with granularity; Described shot-peening is to be the shot of 0.5mm～0.8mm with diameter.
In the above-mentioned method for preparing steel-copper composite shaft sleeve in the spraying mode of colding pressing: the described oxy-acetylene subsonic speed of step (3) flame reaches the high compression combustion chamber of 0.88MPa by pressure and the subsonic speed spray gun of compression-expanding nozzle produces.Adopt this spray gun can reach the purpose of powder particle being carried out high speed flange spraying, the flying speed of molten particles can reach 250m/s～320m/s.
In the above-mentioned method for preparing steel-copper composite shaft sleeve in the spraying mode of colding pressing: the composition of the described nickel alclad of step (3) alloy powder is by weight percentage: Ni 75%～80%, Al 20%～25%, particle size is not less than 300 orders.
In the above-mentioned method for preparing steel-copper composite shaft sleeve in the spraying mode of colding pressing: the described spraying parameter of step (3) is preferably: oxygen pressure 0.35MPa～0.75MPa, acetylene pressure 0.08MPa～0.12MPa, pressure 0.4MPa～the 0.6MPa of pressurized air powder feeding gas, spray distance 130mm～180mm, powder sending quantity 15g/min～22g/min, 80 °～85 ° of spray angles.
In the above-mentioned method for preparing steel-copper composite shaft sleeve in the spraying mode of colding pressing: the described Cuprum alloy of step (4) is that granularity is not less than 300 purpose Cu-Zn-Mn alloy powders; The composition of alloy powder is by weight percentage: Cu 63%～70%, Zn 23%～30%, and Mn 3%～7%; The impurity content weight percentage is less than 0.8%.
In the above-mentioned method for preparing steel-copper composite shaft sleeve in the spraying mode of colding pressing: the described spraying parameter of step (4) is preferably: oxygen pressure 0.6MPa～0.8MPa, acetylene pressure 0.08MPa～1.2MPa, pressure 0.4MPa～the 0.6MPa of pressurized air powder feeding gas, spray distance 150mm～180mm, powder sending quantity 40g/min～50g/min, 76 °～82 ° of spray angles.
In the above-mentioned method for preparing steel-copper composite shaft sleeve in the spraying mode of colding pressing: the described shielded metal arc welding of step (7) adopts the E4303 welding rod of diameter 2.5～3.2mm that the axle sleeve longitudinal joint is welded, optimizing technology parameters is: welding current 95A～125A, weldingvoltage 24A～25V, welding speed 0.4cm/min～0.6cm/min.
In the above-mentioned method for preparing steel-copper composite shaft sleeve in the spraying mode of colding pressing: the described steel-copper composite shaft sleeve of step (8) also should be at oilhole, the oil groove of the multiple layer of brass friction surface according to the various rules of designing requirement machining, to improve its self-lubricating property.
It is fast that the method for preparing steel-copper composite shaft sleeve in steel surface low temperature spraying brass, cold-press moulding and welding of the present invention has spraying rate, efficient height, coating bond height, is suitable for advantage such as cold-press moulding; The copper clad surface of using the inventive method acquisition has good self lubricity and wear resistance.This technology can prepare the steel-copper plied timber of thicker copper coating.Adopt this technology to make automobile steel-copper composite shaft sleeve, can save copper material in a large number, reach purpose with copper take place of steel.Of the present invention by low temperature spraying with cold pressing and prepare the method for steel-copper composite shaft sleeve, have easy and simple to handle, applicability strong, the spray efficiency advantages of higher; The subsonic speed flame spraying technology that adopts has improved 5-6 doubly than the speed (about 40m/s) of common oxygen-acetylene flame sprayed coating, has improved 1～2 times than the spraying of atmospheric plasma arc.In addition, this cost of equipment that adopted of invention and operating cost are than low many of plasma spraying and supersonic spray coating, and oxygen consumption tolerance still less, and is easy to utilize.
Adopt the test specimen for preparing in the technological method of steel surface high speed flange spraying copper of the present invention, do not see except cold-press moulding and to occur the crackle, also be heated to 500 ℃, 650 ℃ and 800 ℃ by the sample after will spraying, drop in the cold water respectively then and test, the sprayfused coating cracking phenomena all do not occur.Copper coating is measured through metallurgical microscope and surface hardness, shows that the sprayfused coating quality is good, defective such as do not have crackle, pore and be mingled with; Formed between copper coating and bond coat, bond coat and the steel base interface and combined closely, adhesive strength reaches 30MPa, and the hardness of steel base is greater than 45HRC, and copper coating hardness is greater than 80HB.
It is little to adopt the steel-copper composite shaft sleeve of manufacturing of the present invention to have a friction factor, and the antifriction performance is good, impact-resistant characteristic, this composite shaft sleeve be applicable to the auto-parts middling speed or in carry and occasion such as low-speed heave-load; The to-and-fro motion guide pin bushing that also can be used for frequent work such as high-precision stamping mould, automobile making mould.Use technology of the present invention and can realize the batch process of steel-copper composite shaft sleeve good prospects for application being arranged.
Embodiment
Embodiment 1:
Length is that 180mm, width are that 135mm, thickness are the Q235 high-quality low carbon steel plate of 4mm, and the process step that sprays, colds pressing and weld preparation steel-copper composite shaft sleeve by low temperature is:
(1) with hand operated grinding wheel arbitrary face of Q235 steel plate is polished, until the alligatoring metal surface of exposing light; (because of test plate (panel) is little, needn't carries out the surface cleaning of surface sand-blasting or shot-peening and handle, directly get final product) with the hand operated grinding wheel polishing.
(2) with oxy-acetylene flame low-temperature prewarming is carried out on the Q235 steel surface after polishing, preheating temperature is 100 ℃～120 ℃;
(3) adopt subsonic speed spray gun with high compression combustion chamber and compression-expanding nozzle, spray nickel alclad alloy powder (particle size is not less than 300 orders, and its composition is by weight percentage: Ni 80%, Al 20%) as bond coat with oxy-acetylene subsonic speed flame on Q235 steel surface; Spraying parameter is: oxygen pressure 0.30MPa～0.65MPa, acetylene pressure 0.06MPa～0.09MPa, pressure 0.3MPa～the 0.5MPa of pressurized air powder feeding gas, spray distance 130mm～160mm, powder sending quantity 10g/min～20g/min, 80 °～84 ° of spray angles, the bond coat THICKNESS CONTROL is at 0.06mm～0.10mm;
(4) adopt the subsonic speed spray gun, (being not less than the spraying of 300 purpose Cu-Zn-Mn alloy powders by granularity forms to spray copper alloy layer with the oxy-acetylene high-speed flame on bond coat basis, Q235 steel surface, the composition of alloy powder is by weight percentage: Cu 63%～70%, Zn 23%～30%, and Mn 3%～7%; The impurity content weight percentage is less than 0.8%.); Spraying parameter is: oxygen pressure 0.50MPa～0.80MPa, acetylene pressure 0.08MPa～1.10MPa, pressure 0.3MPa～the 0.5MPa of pressurized air powder feeding gas, spray distance 140mm～180mm, powder sending quantity 30g/min～45g/min, 78 °～83 ° of spray angles can spray continuously or intermittently, the sprayfused coating thickness 2.1mm～2.5mm of acquisition;
(5) thickness (more than the required thickness 2mm) of detection copper coating, and grinding copper coating surface makes it bright and clean;
(6) by 25 tons of oil hydraulic presses with the method for colding pressing, will be pressed into the multiple layer of copper through the steel-copper complex laminate of spraying by width direction is the cylindrical shape composite shaft sleeve of 40mm at interior internal diameter;
(7) adopt shielded metal arc welding with the E4303 welding rod of diameter 2.5mm the composite shaft sleeve longitudinal joint to be welded, process parameter is: welding current 95A～105A, weldingvoltage 24V, welding speed 0.4cm/min～0.5cm/min;
(8) adopt the method for turning to reach the size requirement of sleeve length, internal diameter and external diameter, length 80mm, internal diameter 40mm, external diameter 45mm (wherein steel base thickness 3.5mm, the multiple layer thickness 1.5mm of copper); This embodiment's sheet material can be processed into 2 composite shaft sleeves;
(9) answer layer friction surface oilhole, the oil groove of machining rule as requested at the copper of composite shaft sleeve internal diameter, to improve its self-lubricating property.
Steel-the copper composite shaft sleeve of the technological method preparation of passing through spraying, cold pressing and weld that proposes by the present invention is measured through metallurgical microscope analysis and surface hardness, shows that this composite shaft sleeve quality is good, and spraying does not have crackle, pore at the interface and defective such as be mingled with; The hardness of the copper coating that obtains at steel surface is greater than 80HB, and the hardness of steel base is greater than 45HRC; Formed between copper coating and bond coat, bond coat and the plain steel interface and combined closely, adhesive strength reaches 30MPa, can satisfy usage requirement.
Embodiment 2:
The length of side is that 265mm, thickness are the Q345 low alloy steel square plate of 6mm, by low temperature spraying, cold pressing and process step that welding method prepares steel-copper composite shaft sleeve is:
(1) with sandblast (or shot-peening) method the Q345 Low Alloy Steel Plate is carried out surface cleaning earlier and handle, with hand operated grinding wheel arbitrary face of Q345 square steel plate is polished then, until the alligatoring metal surface of exposing light;
(2) low-temperature prewarming is carried out on the Q345 steel surface of manual grinder buffing being crossed with oxy-acetylene flame, and preheating temperature is 100 ℃～120 ℃;
(3) adopt the subsonic speed spray gun, spray nickel alclad alloy powder (particle size is not less than 300 orders, and its composition is by weight percentage: Ni 80%, Al 20%) as bond coat on Q345 steel surface with oxy-acetylene subsonic speed flame; Spraying parameter is: oxygen pressure 0.45MPa～0.75MPa, acetylene pressure 0.08MPa～0.11MPa, pressure 0.4MPa～the 0.6MPa of pressurized air powder feeding gas, spray distance 130mm～160mm, powder sending quantity 15g/min～22g/min, 80 °～84 ° of spray angles, the bond coat THICKNESS CONTROL is at 0.08mm～0.13mm;
(4) adopt the subsonic speed spray gun, on bond coat basis, Q345 steel surface, spray copper alloy layer with the oxy-acetylene high-speed flame, this alloy-layer is not less than the spraying of 300 purpose Cu-Zn-Mn alloy powders by granularity and forms, the composition of alloy powder is by weight percentage: Cu 63%～70%, Zn 23%～30%, and Mn 3%～7%; The impurity content weight percentage is less than 0.8%.); Spraying parameter is: oxygen pressure 0.60MPa～0.90MPa, acetylene pressure 0.08MPa～1.15MPa, pressure 0.4MPa～the 0.6MPa of pressurized air powder feeding gas, spray distance 1450mm～190mm, powder sending quantity 35g/min～50g/min, 78 °～84 ° of spray angles can spray continuously or intermittently, the sprayfused coating thickness 2.6mm～2.9mm of acquisition;
(5) thickness (more than the required thickness 2.5mm) of detection copper coating, and grinding copper coating surface makes it bright and clean;
(6) by 25 tons of oil hydraulic presses with the method for colding pressing, will be pressed into the multiple layer of copper through the steel-copper complex laminate of spraying is the cylindrical shape composite shaft sleeve of 80mm at interior internal diameter;
(7) adopt shielded metal arc welding with the E4303 welding rod of diameter 3.2mm the composite shaft sleeve longitudinal joint to be welded, process parameter is: welding current 100A～125A, weldingvoltage 24V～25V, welding speed 0.4cm/min～0.6cm/min;
(8) adopt the method for turning to reach the size requirement of sleeve length, internal diameter and external diameter, length 80mm, internal diameter 80mm, external diameter 88mm (wherein steel base thickness 5.8mm, the multiple layer thickness 2.2mm of copper); This embodiment can be processed into 3 composite shaft sleeves;
(9) answer layer friction surface oilhole, the oil groove of machining rule as requested at the copper of composite shaft sleeve internal diameter, to improve its self-lubricating property.
Measure through metallurgical microscope analysis and surface hardness, this composite shaft sleeve quality is good, and the coating interface place does not have crackle, pore and defective such as is mingled with; The hardness of the copper coating that obtains at surface of low-alloy steel is greater than 80HB, and the hardness of steel base is greater than 46HRC; Formed between copper coating and bond coat, bond coat and the low alloy steel basal body interface and combined closely, adhesive strength reaches 30MPa, can satisfy usage requirement.
Enforcement of the present invention can high efficiency spray thicker copper coating on the carbon steel board surface, and be prepared into steel-copper composite shaft sleeve by cold-press moulding and welding, improve the self lubricity and the wear resistance of part surface, improve working life, replace full copper spare, save a large amount of copper materials.Adopt this technology to prepare steel-copper composite shaft sleeve as producing in batches, cost of production can further reduce, and has a good application prospect.
Claims (9)
1. one kind prepares the method for steel-copper composite shaft sleeve in the spraying mode of colding pressing, and comprises the steps:
(1) steel piece surface to be sprayed is implemented to purify and/or roughening treatment, until steel piece surface non-corroding and oxide layer, end the metal surface that manifests light;
(2) with oxy-acetylene flame the steel piece surface after handling is carried out low-temperature prewarming, make its preheating temperature reach 100 ℃～120 ℃;
(3) adopting the steel piece surface spraying nickel alclad alloy powder of oxy-acetylene subsonic speed flame after preheating to form thickness is the bond coat of 0.05mm～0.15mm; Wherein spraying parameter is: oxygen pressure 0.15MPa～0.85MPa, acetylene pressure 0.06MPa～0.12MPa, the pressure 0.3MPa～0.6MPa of pressurized air powder feeding gas, spray distance 120mm～200mm, powder sending quantity 5g/min～25g/min, 70 °～85 ° of spray angles;
(4) adopting oxy-acetylene subsonic speed flame to spray Cuprum alloy formation thickness on steel piece surface bond coat basis is the brass alloys coating of 2mm～3mm; Wherein spraying parameter is: oxygen pressure 0.40MPa～0.96MPa, acetylene pressure 0.06MPa～0.15MPa, pressure 0.3MPa～the 0.6MPa of pressurized air powder feeding gas, spray distance 100mm～200mm, powder sending quantity 35g/min～65g/min, 70 °～86 ° of spray angles, spraying method repeats to spray 2～5 times continuously;
(5) thickness and the uniformity of detection brass alloys coating; Get the steel-copper complex laminate that meets technical requirements, its copper alloy coating surface of grinding makes it bright and clean, and is standby;
(6) by the art designs direction steel-copper complex laminate of step (5) being pressed into the multiple layer of brass with the method for colding pressing with oil hydraulic press is the cylindrical shape composite shaft sleeve of designing requirement at interior, internal diameter;
(7) adopt shielded metal arc welding that the cylindrical shape composite shaft sleeve longitudinal joint of step (6) is welded, process parameter is: welding current 90A～130A, weldingvoltage 24V～26V, welding speed 0.4cm/min～0.6cm/min;
(8) the cylindrical shape composite shaft sleeve that adopts machining process that step (7) is made reaches the size requirement of sleeve length, internal diameter and the external diameter of design, gets steel-copper composite shaft sleeve finished product.
2. prepare the method for steel-copper composite shaft sleeve according to claim 1 in the spraying mode of colding pressing, it is characterized in that: the described method for treatment of purifying of step (1) is to adopt sandblast or ball blasting method that the corrosion and the oxide layer of steel piece surface are thoroughly cleared up; Coarsing processing method is with hand operated grinding wheel steel piece surface to be polished until the metal surface that manifests light.
3. as prepare the method for steel-copper composite shaft sleeve as described in the claim 2 in the spraying mode of colding pressing, it is characterized in that: described sandblast is to be 15～40 purpose Emery grains or silica sands with granularity; Described shot-peening is to be the shot of 0.5mm～0.8mm with diameter.
4. the method for preparing steel-copper composite shaft sleeve according to claim 1 in the spraying mode of colding pressing, it is characterized in that: the composition of the described nickel alclad of step (3) alloy powder is by weight percentage: Ni 75%～80%, Al 20%～25%, particle size is not less than 300 orders.
5. the method for preparing steel-copper composite shaft sleeve according to claim 1 in the spraying mode of colding pressing, it is characterized in that: the described spraying parameter of step (3) is: oxygen pressure 0.35MPa～0.75MPa, acetylene pressure 0.08MPa～0.12MPa, pressure 0.4MPa～the 0.6MPa of pressurized air powder feeding gas, spray distance 130mm～180mm, powder sending quantity 15g/min～22g/min, 80 °～85 ° of spray angles.
6. prepare the method for steel-copper composite shaft sleeve according to claim 1 in the spraying mode of colding pressing, it is characterized in that: the described Cuprum alloy of step (4) is that granularity is not less than 300 purpose Cu-Zn-Mn alloy powders; The composition of alloy powder is by weight percentage: Cu 63%～70%, Zn 23%～30%, and Mn 3%～7%; The impurity content weight percentage is less than 0.8%.
7. the method for preparing steel-copper composite shaft sleeve according to claim 1 in the spraying mode of colding pressing, it is characterized in that: the described spraying parameter of step (4) is: oxygen pressure 0.6MPa～0.8MPa, acetylene pressure 0.08MPa～1.2MPa, pressure 0.4MPa～the 0.6MPa of pressurized air powder feeding gas, spray distance 150mm～180mm, powder sending quantity 40g/min～50g/min, 76 °～82 ° of spray angles.
8. the method for preparing steel-copper composite shaft sleeve according to claim 1 in the spraying mode of colding pressing, it is characterized in that: the described shielded metal arc welding of step (7) adopts the E4303 welding rod of diameter 2.5～3.2mm that the axle sleeve longitudinal joint is welded, process parameter is: welding current 95A～125A, weldingvoltage 24A～25V, welding speed 0.4cm/min～0.6cm/min.
9. the method for preparing steel-copper composite shaft sleeve according to claim 1 in the spraying mode of colding pressing, it is characterized in that: the described steel-copper composite shaft sleeve of step (8) should be at oilhole, the oil groove of the multiple layer of brass friction surface according to the various rules of designing requirement machining, to improve its self-lubricating property.
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| CNA2007101151441A CN101178094A (en) | 2007-12-06 | 2007-12-06 | Method for preparing steel-copper composite sleeve by spraying cold-pressing mode |
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| CNA2007101151441A CN101178094A (en) | 2007-12-06 | 2007-12-06 | Method for preparing steel-copper composite sleeve by spraying cold-pressing mode |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102286718A (en) * | 2010-06-17 | 2011-12-21 | 上海宝钢设备检修有限公司 | Method for improving bond strength of thermal spraying coating layer and metal substrate |
| CN102492916A (en) * | 2011-12-21 | 2012-06-13 | 神龙汽车有限公司 | Recovering method for worn shaft surface of speed changing box |
| CN109136816A (en) * | 2018-11-09 | 2019-01-04 | 中国矿业大学 | A kind of self-lubricating bearing electric arc spraying preparation method for covering copper powder steel plate |
-
2007
- 2007-12-06 CN CNA2007101151441A patent/CN101178094A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102286718A (en) * | 2010-06-17 | 2011-12-21 | 上海宝钢设备检修有限公司 | Method for improving bond strength of thermal spraying coating layer and metal substrate |
| CN102492916A (en) * | 2011-12-21 | 2012-06-13 | 神龙汽车有限公司 | Recovering method for worn shaft surface of speed changing box |
| CN102492916B (en) * | 2011-12-21 | 2013-10-09 | 神龙汽车有限公司 | Recovering method for worn shaft surface of speed changing box |
| CN109136816A (en) * | 2018-11-09 | 2019-01-04 | 中国矿业大学 | A kind of self-lubricating bearing electric arc spraying preparation method for covering copper powder steel plate |
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