W含量对激光增材制造W/IN625合金显微组织和性能的影响  

Effect of W Content on Microstructure and Properties of W/IN625 Alloy Fabricated by Laser Additive Manufacturing

作　　者：桂子俊 邱长军[1] 伍文星 陈平虎[1] 阳彤 朱涛 GUI Zijun;QIU Changjun;WU Wenxing;CHEN Pinghu;YANG Tong;ZHU Tao(Hunan Provincial Key Laboratory of Equipment Safety Service Technology under Abnormal Environment,University of South China,Hengyang Hunan 421001,China)

机构地区：[1]南华大学超常环境下机电装备安全服役技术湖南省重点实验室,湖南衡阳421001

出　　处：《上海金属》2025年第2期39-45,63,共8页Shanghai Metals

基　　金：湖南省研究生科研创新项目(CX20230956)。

摘　　要：IN625合金在800℃以上的环境中力学性能偏低。为了提高合金的高温力学性能,使用激光增材制造技术制备了3种不同W含量(质量分数分别为1%、5%、9%)的W/IN625合金。通过万能试验机、X射线衍射仪、扫描电子显微镜和JMatPro软件等研究了W含量对合金显微组织和力学性能的影响。结果表明:添加W细化了IN625合金晶粒;随着W含量的增加,合金的室温拉伸强度提高,断后伸长率略微下降,950℃拉伸强度和断后伸长率提高;W质量分数为9%的合金的950℃抗拉强度为178 MPa,屈服强度为161 MPa,断后伸长率为6.7%,相比IN625合金分别提高了26.2%、37.6%和191.3%。因此,在IN625合金中添加W能提高其室温及高温力学性能。Mechanical properties of IN625 alloy are relatively low in environments above 800℃.In order to improve the mechanical properties of the alloy at high temperature,three kinds of W/IN625 alloys with different W contents(1%,5%,and 9%,by mass,respectively)were fabricated by using laser additive manufacturing technology.The effects of W content on the microstructure and mechanical properties of the alloy were investigated by using universal testing machine,X-ray diffractometer,scanning electron microscope and JMatPro software.The results showed that(a)the addition of W refined the grain of the IN625 alloy,with the increase of W content,the tensile strength of the alloy increased and the elongation slightly decreased at room temperature,and the tensile strength and elongation increased at 950℃;(b)the tensile strength,yield strength,and elongation of the alloy with 9%W by mass at 950℃were 178,161 MPa and 6.7%,respectively,which were 26.2%,37.6%,and 191.3%higher than those of the IN625 alloy.Therefore,the addition of W to IN625 alloy could improve its mechanical properties at room temperature and high temperature.

关 键 词：激光增材 IN625 合金 W 含量 显微组织 高温力学性能 

分 类 号：TG146[一般工业技术—材料科学与工程]