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IntroductionLaser cladding on aluminum alloy surface is avalid means to improve its surface characteristic.In the past researches,the self- molten alloys wereusually used for laser claddings to improve surfacewear resistance of aluminum alloys[1,2 ] .However,owing to great difference of heat expansion coeffi-cients between aluminum alloy substrate and cladmaterials,such as Ni- Cr- Si- B,Ni- Cr- Al,the big-ger strain in clad layer is formed during solidifica-tion,which results in a lot of cr… 相似文献
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