本文選題：激光熔覆 + 鈷基合金��； 參考：《焊接學(xué)報(bào)》2015年01期

【摘要】：采用半導(dǎo)體激光器在316L不銹鋼表面制備鈷基合金熔覆層,對(duì)激光熔覆層的組織形貌、成分、結(jié)構(gòu)及鋅蝕機(jī)理進(jìn)行了系統(tǒng)研究.結(jié)果表明,選擇優(yōu)化的激光輻照工藝參數(shù),獲得的鈷基合金熔覆層表面平整、無(wú)裂紋、與基材呈良好的冶金結(jié)合.鈷基合金熔覆層主要由γ-Co,M23C6及耐腐蝕性能優(yōu)異的Laves相Co3Mo2Si和少量硬質(zhì)耐磨相Co6W6C組成.在460℃熔融鋅中腐蝕試驗(yàn)表明,鈷基合金熔覆層的鋅蝕機(jī)理為選擇性腐蝕,熔覆層表層出現(xiàn)一層亮白色腐蝕過(guò)渡層,在過(guò)渡層內(nèi)鈷基固溶體基體優(yōu)先發(fā)生腐蝕,導(dǎo)致Laves相剝落,從而形成了鋅液對(duì)鈷基合金熔覆層的進(jìn)一步腐蝕.
[Abstract]:Co-base alloy cladding layer was prepared by semiconductor laser on 316L stainless steel. The microstructure, composition, structure and zinc corrosion mechanism of laser cladding layer were studied systematically. The results show that the surface of cobalt-based alloy cladding layer is flat, no crack and good metallurgical bonding with the substrate by selecting the optimized laser irradiation process parameters. Co-based alloy cladding is mainly composed of 緯 -CoM23C6, Laves phase Co _ 3Mo _ 2Si with excellent corrosion resistance and a small amount of hard wear resistant phase Co _ 6W _ 6C. The corrosion test in molten zinc at 460 鈩，

本文編號(hào)：2074556