CN103290258B - A kind of self-lubricating copper based wear-resistant alloy and preparation method thereof - Google Patents
A kind of self-lubricating copper based wear-resistant alloy and preparation method thereof Download PDFInfo
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- CN103290258B CN103290258B CN201310210341.7A CN201310210341A CN103290258B CN 103290258 B CN103290258 B CN 103290258B CN 201310210341 A CN201310210341 A CN 201310210341A CN 103290258 B CN103290258 B CN 103290258B
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Abstract
The present invention relates to a kind of self-lubricating copper based wear-resistant alloy, elementary composition by following weight percent: the lead of Cu:75-85wt%, Sn:5-8wt%, mixed rare earth of lanthanum and cerium metal: 0.5-2wt% and surplus; After taking each raw material by proportioning, in medium-frequency induction furnace, carry out the presmelting of alloy, then carry out spray deposition by reaction-injection moulding equipment, the alloy material described in formation; Described alloy material is on the basis of traditional ZCuPb15Sn8 casting alloy, and adopt and add rare earth element and jet deposition novel preparation process, improve matrix strength and self lubricity, wear resisting property significantly improves.
Description
Technical field
The present invention relates to a kind of self-lubricating copper based wear-resistant alloy and preparation method thereof, belong to wear resistant alloy material preparation field.
Background technology
Oil engine is the basis of industrialization of the country development as one of equipment dynamic source main now, the self-lubricating abrasion-proof material of oil engine centre bearer is the critical material that equipment can maintain for a long time, run up, so development becomes with the relevant high-abrasive material of improvement the most important thing improving equipment performance.
At present, the formation of bearing high-abrasive material tissue is distributed on hard matrix primarily of soft disperse phase, improve the wear resisting property of material, particle size and the distribution of disperse phase must be improved, improve the performance of matrix simultaneously, and the lifting of material self-lubricating property, also must redesign formation and the composition of disperse phase.Therefore, the formation of design disperse phase and composition, become the key of design or improvement oil engine centre bearer material.ZCuPb15Sn8 is that the copper base alloy of representative passes through with thin plumbous phase more, reach the design requirements of oil engine centre bearer material, but ZCuPb15Sn8 alloy also also exists organizes inadequate refinement, the shortcoming that matrix strength is lower, limits the work-ing life of oil engine centre bearer material.This patent with above-mentioned situation for background, by adding combination rare earth metal, and in conjunction with novel spray deposition processing, the tissue of refinement disperse phase also increases matrix strength, thus improve the work-ing life of oil engine centre bearer material, there is not yet open report in the current data at home and abroad of above-mentioned improvement.
Summary of the invention
The object of the present invention is to provide a kind of self-lubricating copper based wear-resistant alloy and preparation method thereof.
The present invention is achieved by the following technical solutions:
A kind of self-lubricating copper based wear-resistant alloy, is made up of the component of following weight percent:
The weight percent of described mixed rare earth of lanthanum and cerium metal consists of: other rare earth element of Ce45% ~ 48%, La17% ~ 30%, Pr4% ~ 8%, Nd10% ~ 18% and surplus.
Preferably, the model of described mixed rare earth of lanthanum and cerium metal is CGXT (purity 99%), and by Baotou, morning twilight Xin Te metal limited liability company provides.
Preferably, the purity of described raw material Cu is 99.9%.
Preferably, the purity of described raw material Sn is 99.9%.
Preferably, the purity of described raw material lead is 99.9%.
Present invention also offers the preparation method of described a kind of self-lubricating copper based wear-resistant alloy, comprise the following steps:
(1) each feed composition is taken by proportioning;
(2) presmelting that medium-frequency induction furnace carries out alloy is placed in;
(3) adopt jet shaper, after again being melted by above-mentioned alloy, carry out supersonic airstream spray deposition, obtained described self-lubricating copper based wear-resistant alloy.
Preferably, in step (2), the order of addition of each raw material is: first put into Cu, Sn and lead, after thawing, then adds combination rare earth metal; The temperature of described presmelting is 1100-1300 DEG C, presmelting time 20min-40min, and presmelting process stirs 3-15 time.
Preferably, in step (3), the gas flow of described supersonic airstream spray deposition is 600-1000L/min; Atomizing gas can select nitrogen, argon gas or its mixed gas; Spray deposition distance is 30-100cm; The effect of atomizing gas prevents alloy to be oxidized in atomization process.
The copper cooling tube of the alternative ZCuPb15Sn8 of described alloy material for the manufacture of cold-rolling mill, the bi-metal shaft bushing of oil engine, to improve the work-ing life of these machineries.
Technique effect of the present invention and advantage are:
The invention provides a kind of novel high-performance copper based wear-resistant alloy, this alloy phase is than traditional casting ZCuPb15Sn8, owing to the addition of rare earth metal, and after have employed this novel preparation process preparation of jet deposition, its matrix strength and self lubricity improve further, thus compare traditional casting ZCuPb15Sn8 and be significantly improved on wear resisting property.The wear rate of this alloy is compared traditional Z CuPb15Sn8 and is reduced about 1/3, and matrix hardness improves about about 30%.
Embodiment
Below by way of specific specific examples, technical scheme of the present invention is described.Should be understood that one or more method stepss that the present invention mentions do not repel and before and after described combination step, also to there is other method steps or can also insert other method steps between these steps clearly mentioned; Should also be understood that these embodiments are only not used in for illustration of the present invention to limit the scope of the invention.And, except as otherwise noted, the numbering of various method steps is only the convenient tool differentiating various method steps, but not be ordering or the enforceable scope of restriction the present invention of restriction various method steps, the change of its relativeness or adjustment, when changing technology contents without essence, when being also considered as the enforceable category of the present invention.
Embodiment 1:
(1) taking 1510g Cu(purity is 99.9%), 138g Sn(purity is 99.9%), 256g lead (purity is 99.9%), and 38g mixed rare earth of lanthanum and cerium metal (model C GXT, producer: Baotou morning twilight Xin Te metal limited liability company);
(2) above-mentioned raw materials is sequentially added into the presmelting carrying out alloy in medium-frequency induction furnace, first puts into Cu, Sn and lead, after thawing, add mixed rare earth of lanthanum and cerium metal; The temperature of presmelting is 1250 DEG C, presmelting time 20min, and presmelting process stirs 6 times, mixes completely to reach;
(3) the supersonic airstream spray deposition process of alloy is then carried out with ultrasonic nebulization jet nozzle: atomizing gas is nitrogen, gas flow 650L/min; The distance of spray deposition is 40cm; Spray deposition terminates namely to obtain described a kind of self-lubricating copper based wear-resistant alloy.
First the former bi-metal shaft bushing material (ZCuPb15Sn8) of combustion motor samples, and the sliding friction carrying out the same terms under ordinary diesel oil condition with this material is tested, touchstone reference: GB1176-87.
Test shows: at sliding distance 1km, and under the condition of load 500N, the dry friction and wear rate of contrast material is 25.8 × 10
-12m
3/ m, this fret wear rate 13.9 × 10
-12m
3/ m, the final wear rate of the alloy material prepared of the present embodiment reaches 46% lower than starting material, and the Schwellenwert of its coefficient of sliding friction, significantly lower than raw-material Schwellenwert.
Embodiment 2
(1) taking 1523g Cu(purity is 99.9%), 144g Sn(purity is 99.9%), 270g lead (purity is 99.9%), 11g mixed rare earth of lanthanum and cerium metal (model C GXT, producer: Baotou morning twilight Xin Te metal limited liability company);
(2) above-mentioned raw materials is sequentially added into the presmelting carrying out alloy in medium-frequency induction furnace, first puts into Cu, Sn and lead, after thawing, then add mixed rare earth of lanthanum and cerium metal; The temperature of presmelting is 1230 DEG C, presmelting time 30min, and presmelting process stirs 10 times, mixes completely to reach;
(3) the supersonic airstream spray deposition process of alloy is then carried out with ultrasonic nebulization jet nozzle: atomizing gas is argon gas, gas flow 700L/min; The distance of spray deposition is 60cm; Spray deposition terminates namely to obtain described a kind of self-lubricating copper based wear-resistant alloy.
Alloy material prepared by the present embodiment is made the actual oil engine test run that bi-metal shaft bushing carries out the sliding surface bearing in ordinary diesel oil oil engine, and compares with the bi-metal shaft bushing prepared by former ZCuPb15Sn8 material.
Measuring method is: the proper mass and the density that first weigh the same parts that bi-material does, by the time specific time node, pull down the bi-metal shaft bushing parts of the same race that bi-material does again to weigh, after then carrying out certain data processing, obtain the result that this is relative.That is alloy material of the present invention has some superiority for the life-span of improving ordinary diesel oil oil engine.
Found that: after fortnight, the mass loss amount preparing bi-metal shaft bushing with the present embodiment alloy material compares former ZCuPb15Sn8 material minimizing about about 11%; After four weeks, this gap reaches about 17%.
Embodiment 3:
(1) taking 1512g Cu(purity is 99.9%), 140g Sn(purity is 99.9%), 278g lead (purity is 99.9%), and 32g mixed rare earth of lanthanum and cerium metal (model C GXT, producer: Baotou morning twilight Xin Te metal limited liability company);
(2) above-mentioned raw materials is sequentially added into the presmelting carrying out alloy in medium-frequency induction furnace, first puts into Cu, Sn and lead, after thawing, add combination rare earth metal; The temperature of presmelting is 1250 DEG C, presmelting time 40min, and presmelting process stirs 8 times, mixes completely to reach;
(3) the supersonic airstream spray deposition process of alloy is then carried out with ultrasonic nebulization jet nozzle: atomizing gas is the mixed gas (mixed volume is than being 1:1) of nitrogen and argon gas, gas flow 1000L/min; The distance of spray deposition is 100cm; Spray deposition terminates namely to obtain described a kind of self-lubricating copper based wear-resistant alloy.
Alloy material prepared by the present embodiment is made segment water-cooled tube be placed in homemade test cold-rolling mill and test respectively with the same size segment prepared by former ZCuPb15Sn8 material.
Measuring method is: first weigh the proper mass of same parts and density, by the time specific time node that bi-material does, then pulls down the segment water-cooled tube that bi-material does and weigh, and obtains the result that this is relative after then carrying out certain data processing.That is alloy material of the present invention has some superiority for the life-span of improving cold-rolling mill.
Found that: after fortnight, the mass loss amount preparing water-cooled tube with the present embodiment alloy material compares former ZCuPb15Sn8 material minimizing about about 15%; After four weeks, this gap reaches about 22%.
Above-mentioned example, only for technical conceive of the present invention and feature are described, its object is to person skilled in the art can be understood content of the present invention and implement according to this, can not limit the scope of the invention with this.All equivalent transformations of doing according to spirit of the present invention or modification, all should be encompassed within protection scope of the present invention.
Claims (4)
1. a self-lubricating copper based wear-resistant alloy, elementary composition by following weight percent:
The preparation method of described a kind of self-lubricating copper based wear-resistant alloy, comprises the following steps:
(1) each feed composition is taken by proportioning;
(2) presmelting that medium-frequency induction furnace carries out alloy is placed in; In step (2), the order of addition of each raw material is: first put into Cu, Sn and lead, after thawing, then adds mixed rare earth of lanthanum and cerium metal; The temperature of described presmelting is 1100-1300 DEG C, presmelting time 20-40min, and presmelting process stirs 3-15 time;
(3) adopt jet shaper, after again being melted by above-mentioned alloy, carry out supersonic airstream spray deposition, obtained described self-lubricating copper based wear-resistant alloy; In step (3), the gas flow of described supersonic airstream spray deposition is 600-1000L/min; Atomizing gas is nitrogen, argon gas or its mixed gas; Spray deposition distance is 30-100cm.
2. a kind of self-lubricating copper based wear-resistant alloy as claimed in claim 1, it is characterized in that, the weight percent of described mixed rare earth of lanthanum and cerium metal consists of: other rare earth element of Ce45% ~ 48%, La17% ~ 30%, Pr4% ~ 8%, Nd10% ~ 18% and surplus.
3. a kind of self-lubricating copper based wear-resistant alloy as claimed in claim 1, is characterized in that, the purity of described raw material Cu is 99.9%; The purity of raw material Sn is 99.9%; The purity of raw material lead is 99.9%.
4. the application of a kind of self-lubricating copper based wear-resistant alloy as described in claim 1 in the bi-metal shaft bushing of the copper cooling tube of cold-rolling mill, oil engine.
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| CN109536752A (en) * | 2018-12-08 | 2019-03-29 | 雷纳德流体智能科技江苏股份有限公司 | The production method of one Albatra metal |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4406857A (en) * | 1980-09-26 | 1983-09-27 | Metal Leve S.A. Industria E Comercio | Alloy for antifriction bearing layer and process of forming an antifriction layer on steel supporting strip |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62151539A (en) * | 1985-12-25 | 1987-07-06 | Hitachi Powdered Metals Co Ltd | Element for roll bearing |
| JPS6439307A (en) * | 1987-08-04 | 1989-02-09 | Nippon Dia Clevite Co | Copper base sliding bearing material |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4406857A (en) * | 1980-09-26 | 1983-09-27 | Metal Leve S.A. Industria E Comercio | Alloy for antifriction bearing layer and process of forming an antifriction layer on steel supporting strip |
Non-Patent Citations (2)
| Title |
|---|
| 喷射沉积法Cu-9Ni-6Sn合金的组织与性能研究;杨东超 等;《电工材料》;20091231(第1期);第14页 * |
| 稀土在铜铅轴瓦合金中的应用;杨信诚;《内燃机配件》;19931231(第2期);第1-5页 * |
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