EQNiCr-3带极堆焊材料的微观组织与力学性能研究  

Microstructure and mechanical properties of EQNiCr-3 strip surfacing material

作　　者：王国伟 曹宇堃 郭枭[2] 宋建廷 暴宋杰 韩莹 Wang Guowei;Cao Yukun;Guo Xiao;Song Jianting;Bao Songjie;Han Ying(Shanghai Engineering Science&Technology Co.,Ltd Cgnpc,Shanghai 200000,China;Harbin Welding Institute Limited Company,Harbin 150028,China;Chinese Mechanical Engineering Society,Beijing 100036,China)

机构地区：[1]中广核数字科技有限公司,上海200000 [2]中国机械总院集团哈尔滨焊接研究所有限公司,哈尔滨150028 [3]中国机械工程学会,北京100036

出　　处：《机械制造文摘（焊接分册）》2024年第4期6-10,共5页Welding Digest of Machinery Manufacturing

摘　　要：研究通过采用光学显微镜探究了EQNiCr-3带极堆焊材料中的微观组织特征,观察了EQNiCr-3合金堆焊层组织形貌及其晶粒尺寸,并进行力学性能试验,分析了不同热输入下堆焊金属的组织性能。试验结果表明,所研究的堆焊层中,γ-Ni基固溶体为主要的组成相,且在其内部分布有大量的弥散强化相,这些微观组织的协同作用显著提高了材料的硬度和抗拉强度。利用显微硬度测试和拉伸试验,评价了热处理状态下EQNiCr-3带极堆焊材料的力学性能。研究发现,经过多次焊接热循环后,材料硬度和抗拉强度较原始状态下分别提升了约10%,而断后伸长率略有下降。This study investigated the microstructure characteristics of EQNiCr-3 strip welding material using an optical microscope,revealing the intrinsic relationship between its microstructure and mechanical properties.The experimental results indicate that theγ-Ni based solid solution is the main constituent phase in the studied weld overlay,and there are a large number of dispersed strengthening phases distributed inside it.The synergistic effect of these microstructures significantly improves the hardness and tensile strength of the material.The mechanical properties of EQNiCr-3 strip electrode overlay material under heat treatment were systematically evaluated using microhardness testing and tensile testing.Research has found that after multiple welding thermal cycles,the hardness and tensile strength of the material have increased by about 10%compared to their original state,while the toughness has slightly decreased.

关 键 词：EQNiCr-3堆焊材料 微观组织 力学性能 显微硬度 拉伸试验 

分 类 号：TG456.7[金属学及工艺—焊接]