Laser cladding of high Co-Ni secondary hardening steel on 18Cr2Ni4WA steel
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- 作者：Renyao Qin ; qinrenyao@sina.com" class="auth_mail" title="E-mail the corresponding author ; Xuejun Zhang ; Shaoqing Guo ; Bingbing Sun ; Siyi Tang ; Wanqing Li
- 关键词：Laser cladding ; High Co&ndash ; Ni secondary hardening steel ; 18Cr2Ni4WA steel ; Laser direct metal deposition ; Microhardness
- 刊名：Surface and Coatings Technology
- 出版年：2016
- 出版时间：15 January 2016
- 年：2016
- 卷：285
- 期：Complete
- 页码：242-248
- 全文大小：1854 K
文摘
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High Co-Ni secondary hardening steel coating was deposited on 18Cr2Ni4WA steel by laser cladding.
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The high Co-Ni steel coating displayed higher microhardness than the 18Cr2Ni4WA steel substrate.
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Microstructure of the high Co-Ni steel coating was investigated by SEM and EDS.
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The difference of microstructures and elements compositions between coating and substrate resulted in their different microhardness.
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Microstructural transformation of the heat-affected zone was ascribed to high cooling rate during laser cladding.