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Al,Si,Mn,Cu杂质原子在纯Ni激光熔凝过程中的重新分布

郑玲 , 邹至荣 , 刘江龙

金属学报

本文重点测量了Al,Si,Mn,Cu杂质原子在纯Ni激光慢速重熔过程中的重新分布。建立了一维传热的解析解模型。对杂质原子重新分布的规律提出了合理的解释。研究结果表明:固液界面溶质再分配是导致深度方向杂质原子重新分布的主要原因。此外,杂质原子从低温向高温区的扩散以及表面杂质原子的选择性蒸发对分布规律的形成也具有不可忽视的贡献。

关键词: Ni , laser melting , impurity atom , redistribution

REDISTRIBUTION OF IMPURITY ATOMS AI, Si, Mn AND Cu IN Ni DURING LASER MELTING

ZHENG Ling , Chongqing Institute of Communications , Chongqing , ChinaZOU Zhirong , LIU Jianglong , Chongqing University , Chongqing , China ZHENG Ling , Lecturer , Department of Mechanical Engineering , Chongqing Institute of Communications , Chongqing 630074 , China

金属学报(英文版)

An explanation of the redistribution of impurity atoms such as Al, Si, Mn and Cu in pure nickel during low speed laser melting is made by one-dimensional analysis model for heat transfer. The solid-liquid interface solute redistribution seems to be the principal cause that makes the impurity atoms redistribute in the depth direction. The diffusion of impurity atoms from low to high temperature zones and their surface selective evaporation are believed to be noticeably contributed to the redistribution.

关键词: Ni , null , null , null

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