纯镍板焊缝区胞状晶形成机制浅析  

Analysis on Formation Mechanism of Cellular Crystals inWeld Zone of Pure Nickel Plate

作　　者：昝斌[1] 朱繁[1] 王平义[1] Zan Bin;Zhu Fan;Wang Pingyi(Jinchuan Group Co., Ltd., State Key Laboratory of Comprehensive Utilization of Nickel and Cobalt Resources, Jinchang 737100, China)

机构地区：[1]金川集团股份有限公司镍钴资源综合利用国家重点实验室,甘肃金昌737100

出　　处：《有色金属加工》2021年第4期36-37,67,共3页Nonferrous Metals Processing

摘　　要：一般金属在定向凝固条件下会形成胞状晶或柱状晶,胞状晶的生长与宏观热流方向平行且与晶体学取向无关。文章对轧制纯镍板的焊缝区金相观察到了明显的胞状晶,显现出晶体学的择优取向,说明变形织构可能导致金属熔体在等轴凝固条件下也能形成胞状晶。Generally,cellular crystals or columnar crystals are formed under the condition of directional solidification,the growth of cellular crystals is parallel to the direction of macroscopic heat flow and independent of crystallographic orientation.In this paper,the crystallographic morphology of the weld zone of the rolled pure nickel plate is obbserved,showing the preferred crystallographic orientation,which indicates that the deformation texture may lead to the formation of cellular crystals in the metal melt under the condition of equiaxed solidification.

关 键 词：纯镍 焊缝区 变形织构 胞状晶 等轴凝固 

分 类 号：TG457.1[金属学及工艺—焊接]