Microstructure and Wear Resistance of Cu-based Composite Coating on 6061 Aluminum Alloy by Laser Cladding

Wei Guangling; Pan Xuemin

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Microstructure and Wear Resistance of Cu-based Composite Coating on 6061 Aluminum Alloy by Laser Cladding
Vol. 30, Issue 4, Pages: 372-375(2010)
Published： 2010 ，
DOI：

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[1]魏广玲,潘学民.6061铝合金激光熔覆铜基复合涂层组织及磨损性能[J].特种铸造及有色合金,2010,30(04):372-375+292.

Wei Guangling, Pan Xuemin. Microstructure and Wear Resistance of Cu-based Composite Coating on 6061 Aluminum Alloy by Laser Cladding. [J]. Special Casting & Nonferrous Alloys 30(4):372-375(2010)
[1]魏广玲,潘学民.6061铝合金激光熔覆铜基复合涂层组织及磨损性能[J].特种铸造及有色合金,2010,30(04):372-375+292. DOI：

Wei Guangling, Pan Xuemin. Microstructure and Wear Resistance of Cu-based Composite Coating on 6061 Aluminum Alloy by Laser Cladding. [J]. Special Casting & Nonferrous Alloys 30(4):372-375(2010) DOI：

摘要

利用激光熔覆工艺在6061合金表面熔覆铜基复合涂层

分析熔覆涂层的微观组织及化学成分

考察熔覆合金成分变化对涂层质量、硬度以及磨损性能的影响。结果表明

熔覆层主要由（Cu

Ni）固溶体、Cu9Al4、AlFe0.23Ni0.77以及CoFe增强相等组成。优化成分条件下

Fe含量为7%

Co含量为9%

熔覆层硬质颗粒体积分数增大

大量硬质颗粒增强体弥散分布在熔覆层Cu-Ni固溶体合金基体组织中

大大增强了基体的抗磨损性能。激光熔覆后的熔覆层表面硬度比6061铝合金提高了4.5倍;磨损体积约为铝合金基线的30%

摩擦因数降至0.3002。

Abstract

Cu-based composite coating was formed on the surface of 6061 aluminum alloy by laser cladding method. The microstructure and chemical composition of the coating were analyzed to understand effects of the change of cladding alloy composition on quality

micro-hardness and wear resistance of the coating. The results reveal that cladding coating is mainly composed of （Cu

Ni） solid solution

Cu9Al4

AlFe0.23Ni0.77 and CoFe phase. In condition of optimized chemical composition

with Fe and Co contents of 7%

respectively

amounts of hard particle reinforcements are uniformly dispersedly distributed into Cu-Ni solid solution in cladding coating

which improves the wear resistance of the 6061 aluminum alloy matrix. Compared with those of 6061 aluminum alloy matrix

surface hardness of cladding coating is increased by 4.5 times

and frictional volume and frictional coefficient are decreased to 30% and to 0.301

respectively

after laser cladding treatment.