新型镍基合金带极堆焊金属三维组织特征  

Three-dimensional microstructure characteristics of new nickel-based alloy strip surfacing metal

作　　者：曹宇堃 郭枭[1] 徐锴[1] 吕晓春[1] 魏超 Cao Yukun;Guo Xiao;Xu Kai;LüXiaochun;Wei Chao(Harbin Welding Institute Limited Company,Harbin 150028,China)

机构地区：[1]中国机械总院集团哈尔滨焊接研究所有限公司,哈尔滨150028

出　　处：《焊接》2023年第9期24-29,39,共7页Welding & Joining

基　　金：国家科技重大专项资金资助项目(2018ZX06004001)。

摘　　要：为研究新型镍基合金带极堆焊金属组织特征,采用光学显微镜、EBSD等手段对新型镍基合金EQNiCrFe-13带极埋弧堆焊金属X,Y,Z 3个方向的组织进行了表征和分析。结果表明,新型镍基合金带极埋弧堆焊金属Z面的平均晶粒尺寸主要分布于180~220μm范围,呈等轴晶特征,X面和Y面的平均晶粒尺寸主要分布于260~310μm范围,呈明显的柱状晶特征,Z面的晶粒尺寸明显小于X面和Y面。3个观察方向上的晶粒,欧拉角分布基本一致,Y方向晶粒取向主要为{011}<100>和{001}<010>,Z方向晶粒取向主要取向为{001}<100>和{011}<100>。由所得的晶粒尺寸及取向结果分析得出结论,新型镍基合金带极埋弧堆焊金属的结晶方向垂直于熔合面,晶粒具有典型的垂直生长的柱状晶特征,堆焊金属组织具有较强的择优取向,内部存在较强的立方织构和高斯织构。In order to study microstructure characteristics of new nickel-based alloy strip surfacing metal,microstructure of new nickel-based alloy EQNiCrFe-13 in X,Y and Z directions was characterized and analyzed by means of optical microscope and EBSD.The results showed that average grain size of Z plane of new nickel-based alloy submerged arc surfacing metal was mainly distributed in the range of 180~220μm,showing equiaxed crystal characteristics.Average grain size of X plane and Y plane was mainly distributed in the range of 260~310μm,showing obvious columnar crystal characteristics.Grain size of Z plane was obviously smaller than that of X plane and Y plane.Euler angles of grains in the three observation directions were basically the same.Grain orientations in Y direction were mainly{011}<100>and{001}<010>,and grain orientations in Z direction were mainly{001}<100>and{011}<100>.From analysis of the obtained grain size and orientation results,it was concluded that crystallization direction of new nickel-based alloy submerged arc surfacing metal was perpendicular to fusion surface,and grains had typical columnar crystal characteristics of vertical growth.Microstructure of surfacing metal had strong preferred orientation,and there were strong cubic texture and Gaussian texture inside.

关 键 词：镍基合金 带极堆焊 择优取向 堆焊金属 

分 类 号：TG455[金属学及工艺—焊接]