CN101474903B - Bismuth bronze-steel composite bimetallic bearing material and method for producing the same - Google Patents

Bismuth bronze-steel composite bimetallic bearing material and method for producing the same Download PDF

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Publication number
CN101474903B
CN101474903B CN2009100448549A CN200910044854A CN101474903B CN 101474903 B CN101474903 B CN 101474903B CN 2009100448549 A CN2009100448549 A CN 2009100448549A CN 200910044854 A CN200910044854 A CN 200910044854A CN 101474903 B CN101474903 B CN 101474903B
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sintering
bismuth
bronze
steel
bismuth bronze
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CN101474903A (en
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何光志
周剑平
陈进添
黄玉霖
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HEWEI IND CO Ltd SHANGHAI
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HEWEI IND CO Ltd SHANGHAI
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Abstract

The invention provides a bismuth bronze-steel composite bimetal bearing material and a manufacturing method thereof, and in particular relates to a bismuth bronze-steel composite bimetal bearing material formed by sintering a bismuth bronze alloy on the surface of a carbon steel material and a manufacturing method thereof. The bismuth bronze-steel composite bimetal bearing material has a laminated structure, the base layer is the carbon steel material, the surface is the bismuth bronze alloy, and the bismuth bronze alloy is sintered on the surface of the bismuth bronze alloy material. The method for manufacturing the bismuth bronze-steel composite bimetal bearing material adopts the powder metallurgy sintering method principle to sinter the bismuth bronze alloy on the surface of the bismuth bronze alloy so as to form the bismuth bronze-steel composite bimetal bearing material.

Description

Bismuth bronze-steel composite bimetallic bearing material and manufacturing approach thereof
Technical field
The present invention relates to a kind of bismuth bronze-steel composite bimetallic bearing material and manufacturing approach thereof, particularly relate to bismuth bronze-steel composite bimetallic bearing material and the manufacturing approach thereof of a kind of bismuth bronze sintering on the carbon steel material surface.
Background technology
Copper bimetallic bearing material of the prior art is widely used in bearing and the axle sleeve of making engine, generator, engineering machinery and household electrical appliance; This material has high bearing capacity and high fatigue resistance, and utilization is quite general in high rotating speed, powerful engine.
Traditional copper bimetallic bearing material is main with Allen's metal-bimetal copper-steel material again, and this material has high bearing capacity and fatigue resistance, also has good wear property, mosaicism simultaneously.Be considered to desirable bearing material always, be widely used.
Yet, because the Allen's metal alloy has and is about 10~40% lead, this produce with process in can influence employee's healthy and environment, in use and after discarding, can be to the environment lead contamination.Therefore seek the leadless copper base bearing and become a useful person that to substitute traditional copper metal bearing material also very urgent.Though also researched and developed some unleaded bearing materials in recent years, still none Pb-free copper-alloy bearing material can replace advantages such as traditional copper-lead bearing material good wear property, mosaicism fully.
The relevant technology of improving discloses less in one Chinese patent application; Like one Chinese patent application number: 200580007617.5 relate to a kind of sintering material for sliding bearing of being made up of copper alloy, it is characterized by stanniferous 10~15WT.%, bismuth-containing 0.5~10WT.%; Graphitiferous 5~12WT.%, surplus is a copper.Said material for sliding bearing also can be covered and be added on the backing material that is made up of steel and/or bronze.
Like one Chinese patent application number: 200510110718.7 disclose a kind of phosphorus content greater than phosphor bronze-steel bimetal bearing material manufacturing process of 0.1%; Metal or alloy transition zone with suitable thickness is set on the structural carbon steel steel backing of the preprepared required trade mark and thickness; Again the phosphor bronze alloy powder with certain phosphorus content equably spreading on steel backing, and make it have certain shop powder thickness; Carry out then once sintered so that the phosphor bronze alloy powder bonded is on steel backing; Carry out once more rolling so that the phosphor bronze alloy layer is fine and close; Then carry out double sintering, so that the phosphor bronze alloy layer is bonded on the steel backing securely; Carry out reroll at last, with the size of accurate control bimetal plate; Final production goes out to meet the phosphor bronze-steel bimetal bearing material of required size requirement.
Summary of the invention
The purpose of this invention is to provide a kind of bismuth bronze-steel composite bimetallic bearing material and manufacturing approach thereof, bismuth bronze-steel composite bimetallic bearing material and the manufacturing approach thereof of a kind of bismuth bronze sintering on the carbon steel material surface particularly are provided.The invention solves the problem of the copper-lead bearing material lead contamination of engine use, kept advantages such as copper-lead bearing material good wear property, mosaicism simultaneously, filled up the blank that the environment-friendly copper alloy bimetal bearing material is produced.A kind of bismuth bronze of the present invention-steel composite bimetallic bearing material uses bismuth-tin-zinc alloy to replace lead, the bismuth bronze of production-steel bearing material, and its hardness and Allen's metal alloy are approaching, and this material passes through Ageing Treatment again, and its performance is more near the Allen's metal alloy.
A kind of bismuth bronze-steel composite bimetallic bearing material of the present invention, described composite bimetallic bearing material is a layer structure, and basic unit is a carbon steel material, and the top layer is a bismuth bronze, and the bismuth bronze sintering is on the carbon steel material surface; The chemical composition of described bismuth bronze is by weight percentage: bismuth 1.0~12.0%, and tin 3.0~13.0%, zinc 1.0~5.0%, copper 69.5~95.0%, other impurity content summation is no more than 0.5%.
As optimized technical scheme:
Aforesaid composite bimetallic bearing material, wherein, described layer structure is two-layer or about two-layer up and down.For platy structure, only need be at the compound bismuth bronze material of the use face of steel plate, bismuth bronze material and steel plate just form the levels relation; Axle construction, pore structure or other form then are bismuth bronze materials on inner surface or each the stress surface sintering in surrounded surface, hole at axle, and forming the inside (or sandwich layer) is that steel, outside stress surface are the bismuth bronze-steel composite bimetallic bearing materials of bismuth bronze.
Aforesaid composite bimetallic bearing material, wherein, described carbon steel material basic unit is dull and stereotyped.In fact, bismuth bronze-steel composite bimetallic bearing material is mainly intended and is used for bearing shell, axle sleeve, pad or packing ring etc. at present, thereby mainly is to obtain tabular bismuth bronze-steel composite bimetallic bearing material earlier, more further moulding.
Aforesaid composite bimetallic bearing material, wherein, the chemical composition of described bismuth bronze is by weight percentage: bismuth 1.0~12.0%; Tin 3.0~13.0%; Zinc 1.0~5.0%, copper 69.5~95.0%, other impurity content summation is no more than 0.5%.
The present invention also provides a kind of manufacturing approach of bismuth bronze-steel composite bimetallic bearing material; Just a kind ofly adopt powder metallurgy sintered method principle to form the manufacturing approach of bismuth bronze-steel composite bimetallic bearing material to the bismuth bronze sintering on carbon steel material surface, may further comprise the steps:
(1),, is paved with the bismuth bronze powder equably through on the pretreated carbon steel steel plate with power spreading device or automatic power spreading machine;
(2) under restitutive protection's atmosphere, in sintering furnace, carry out first sintering, 700~780 ℃ of sintering temperatures, sintering time 15~100 minutes;
(3) blooming and levelling carries out the material behind the first sintering cold rollingly on cold-rolling mill, be rolling to by predefined thickness;
(4) under restitutive protection's atmosphere, in sintering furnace, carry out sintering once more, sintering temperature is 800~860 ℃, the time is 15~100 minutes;
(5) finish rolling and levelling carries out finish rolling once more through the material behind the sintering once more on cold-rolling mill, be rolling to by predefined thickness.
The manufacturing approach of aforesaid a kind of bismuth bronze-steel composite bimetallic bearing material, wherein, after the preliminary treatment of described carbon steel steel plate comprises surface of steel plate oil removing, rust cleaning, copper facing or hacking again.
The manufacturing approach of aforesaid a kind of bismuth bronze-steel composite bimetallic bearing material; Wherein, Described restitutive protection's atmosphere is hydrogen, decomposed ammonia or hydrogen and nitrogen mixture protective atmosphere, and the mixed proportion of hydrogen and nitrogen is a hydrogen: nitrogen is 5%~95%: 95%~5%.
The manufacturing approach of aforesaid a kind of bismuth bronze-steel composite bimetallic bearing material, wherein, described sintering furnace is net belt type continuous fritting furnace or automatic continuous fritting furnace.
The manufacturing approach of aforesaid a kind of bismuth bronze-steel composite bimetallic bearing material, wherein, the particle diameter of described bismuth bronze powder is not more than 0.25mm.
The invention has the beneficial effects as follows:
A kind of bismuth bronze-steel composite bimetallic bearing material of the present invention has very high strength and hardness, can bear very high load, has lower coefficient of friction, can reduce generation abrasion interlock and cause the accident; Compare with traditional lead bronze bearing material, it does not contain heavy metal lead, meets environmental protection requirement; The bearing performance such as anti-attrition property, mosaicism that has kept the excellence of Allen's metal alloy.
The specific embodiment
Below in conjunction with the specific embodiment, further set forth the present invention.Should be understood that these embodiment only to be used to the present invention is described and be not used in the restriction scope of the present invention.Should be understood that in addition those skilled in the art can do various changes or modification to the present invention after the content of having read the present invention's instruction, these equivalent form of values fall within the application's appended claims institute restricted portion equally.
A kind of bismuth bronze-steel composite bimetallic bearing material of the present invention, described composite bimetallic bearing material is a layer structure, and basic unit is a carbon steel material, and the top layer is a bismuth bronze, and the bismuth bronze sintering is on the carbon steel material surface.
Wherein, described layer structure is two-layer or about two-layer up and down.For platy structure, only need be at the compound bismuth bronze material of the use face of steel plate, bismuth bronze material and steel plate just form the levels relation; Axle construction, pore structure or other form then are bismuth bronze materials on inner surface or each the stress surface sintering in surrounded surface, hole at axle, and forming the inside (or sandwich layer) is that steel, outside stress surface are the bismuth bronze-steel composite bimetallic bearing materials of bismuth bronze.
Described carbon steel material basic unit is dull and stereotyped; In fact; Bismuth bronze-steel composite bimetallic bearing material is mainly intended and is used for bearing shell, axle sleeve, pad or packing ring etc. at present, thereby mainly is to obtain tabular bismuth bronze-steel composite bimetallic bearing material earlier, more further moulding.
The chemical composition of described bismuth bronze is by weight percentage: bismuth 1.0~12.0%, and tin 3.0~13.0%, zinc 1.0~5.0%, copper 69.5~95.0%, other impurity content summation is no more than 0.5%.
Embodiment 1
1. production material specification is: gross thickness 2.50 * alloy width 100mm, alloy thickness are bismuth bronze-steel composite bimetallic bearing material sheet material of 0.5mm.
2. steel plate is prepared: select the Fine Steel Casting iron steel plate of the SPCC trade mark for use, 2.5 * 106 * 625mm with the steel plate shearing of opening greatly becomes to design carries out degreasing and rust removal, change to be rolled to 2.0 ± 0.01 * 106 * 780mm, and smoothing, flatness≤0.5mm.
3. alloy powder is prepared, the chemical composition of powder by weight percentage, bismuth (Bi) 1.0%, tin (Sn) 8.0%, zinc (Zn) 1.0%, total impurities 0.5%, surplus are copper.
4. the finished product by design is the alloy layer thickness of 0.5mm; Shop powder thickness is 0.85mm; Alloy powder is layered on the good steel plate of preliminary treatment uniformly, and in the crawler type sintering furnace that is connected with decomposed ammonia restitutive protection atmosphere, carries out sintering, first sintering (just burning) temperature is 800 ℃.Sintering time is 20 minutes, makes between the alloy powder, and certain bond strength is arranged between alloy powder and the steel plate.
5. blooming and levelling, at the beginning of material after burning on cold-rolling mill, carry out cold rollingly, be rolling to the thickness of 2.60mm, precision is controlled at ± 0.01mm.The purpose of breaking down is to improve the density of alloy.
6. resintering.The material that breaking down is good carries out once more sintering (resintering) under 850 ℃ temperature, sintering time is 20 minutes, makes between the alloy, and the bond strength between alloy and the steel plate further improves.
7. finish rolling and smoothing.Material through behind the resintering is rolled (finish rolling), and rolling back thickness is 2.50 ± 0.01mm, its objective is the density of further raising alloy, and reaches the thickness of desired bismuth bronze-steel composite bimetallic material.
Embodiment 2
The production material specification is: gross thickness 3.5 * alloy width 100mm; Alloy thickness is 0.80mm, bismuth bronze-steel composite bimetallic bearing material sheet material, select the Fine Steel Casting iron structural steel and iron of the St37-2G trade mark for use; Steel plate shearing is become the billot of width 106mm and length 600mm; Carry out surface degreasing, rust cleaning, change the thickness that rolls 2.70mm, and smoothing.The chemical composition of powder by weight percentage; Bismuth (Bi) 6.0%, tin (Sn) 8.0%, zinc (Zn) 2.0%; Total impurities 0.5%; Surplus is that the alloy powder of copper is layered on the steel plate of having handled well uniformly, and is placed on to be connected with and carries out sintering in restitutive protection's atmosphere sintering furnace, and remaining production technology is with embodiment 1.
Embodiment 3
The production material specification is: gross thickness 6.0 * alloy width 150mm; Alloy thickness is 1.50mm, bismuth bronze-steel composite bimetallic bearing material sheet material, select the carbon steel structural steel and iron of the SS400 trade mark for use; Steel plate shearing is become the billot of width 156mm and length 650mm; Carry out surface degreasing, rust cleaning, change and be rolled to 4.50mm thickness, and smoothing.The chemical composition of powder by weight percentage; Bismuth (Bi) 12.0%, tin (Sn) 8.0%, zinc (Zn) 2.5%; Total impurities 0.5%; Surplus is that the alloy powder of copper is layered on the steel plate of having handled well uniformly, and puts sintering furnace into and in restitutive protection's atmosphere, carry out sintering, and remaining production technology is with embodiment 1.

Claims (3)

1. bismuth bronze-steel composite bimetallic bearing material, it is characterized in that: described composite bimetallic bearing material is a layer structure, and basic unit is a carbon steel material, and the top layer is a bismuth bronze, and the bismuth bronze sintering is on the carbon steel material surface; The chemical composition of described bismuth bronze is by weight percentage: bismuth 1.0~12.0%, and tin 3.0~13.0%, zinc 1.0~5.0%, copper 69.5~95.0%, other impurity content summation is no more than 0.5%.
2. the manufacturing approach of a kind of bismuth bronze-steel composite bimetallic bearing material as claimed in claim 1 is characterized in that, may further comprise the steps:
(1),, is paved with the bismuth bronze powder equably through on the pretreated carbon steel steel plate with power spreading device or automatic power spreading machine;
(2) under restitutive protection's atmosphere, in sintering furnace, carry out first sintering, 700~780 ℃ of sintering temperatures, sintering time 15~100 minutes;
(3) blooming and levelling carries out the material behind the first sintering cold rollingly on cold-rolling mill, be rolling to by predefined thickness;
(4) under restitutive protection's atmosphere, in sintering furnace, carry out sintering once more, sintering temperature is 800~860 ℃, the time is 15~100 minutes;
(5) finish rolling and levelling carries out finish rolling once more through the material behind the sintering once more on cold-rolling mill, be rolling to by predefined thickness.
3. method as claimed in claim 2 is characterized in that, described restitutive protection's atmosphere is hydrogen, decomposed ammonia or hydrogen and nitrogen mixture protective atmosphere.
CN2009100448549A 2009-01-04 2009-01-04 Bismuth bronze-steel composite bimetallic bearing material and method for producing the same Active CN101474903B (en)

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CN102039414B (en) * 2010-06-23 2013-10-16 福建龙溪轴承(集团)股份有限公司 Copper-based dispersive bimetallic self-lubricating material and method for preparing self-lubricating base material
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CN105478518A (en) * 2014-09-15 2016-04-13 怀宁汉升车辆部件有限公司 Production technology of steel-copper bimetal composite material for bearing manufacture
CN104259434B (en) * 2014-09-16 2016-08-24 西安理工大学 A kind of preparation method of tin bronze-rustless steel double-metal wearing piece
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