燃机用高纯净度IN792母合金工业制备及其性能研究  

Study on the Industrial Preparation of High Purity IN792 Master Alloy for Combustion Engines and Its Property

作　　者：赵帅 金开锋 乔峰 周瀚 卢华东 ZHAO Shuai;JIN Kai-feng;QIAO Feng;ZHOU Han;LU Hua-dong(Jiangsu Qina New Material Technology Co.,Ltd.,Suqian Jiangsu 223800,China)

机构地区：[1]江苏奇纳新材料科技有限公司,江苏宿迁223800

出　　处：《铸造设备与工艺》2025年第1期30-34,66,共6页Foundry Equipment & Technology

基　　金：宿迁市增材制造用高温合金重点实验室(M202402)。

摘　　要：对现有工业量产IN792合金生产各工序进行优化,进而研究各工序对母合金纯净度的影响,并对优化后的高纯母合金进行力学性能测试,基于扫描电镜(SEM)和能谱仪(EDS)对高温持久断口分析。结果表明:关键原材料的抛丸工艺、优化成型温度至1580℃后的辅材坩埚、两道档渣两道过滤的浇注系统的共同作用下,制备出了更高纯净的IN792母合金。该量产工艺下,合金的纯净度大幅提升,合金浮渣面积从2.36%下降至0.57%,同比减小75.84%,O、N含量最低低至8ppm;此外,合金力学性能也有了进一步提升:高温拉伸抗拉强度可达到1164 MPa,较客户技术要求提升约14.1%;屈服强度为1008 MPa,提升约18.6%;高温持久时间最长可达136 h,持久延伸率为6.39%.The present work optimises the existing industrial mass production of IN792 alloy production processes,and then studies the influence of each process on the purity of the master alloy,and conducts mechanical property tests on the optimised high-purity master alloy,and analyses the high-temperature persistent fracture based on scanning electron microscopy(SEM)and energy spectrometry(EDS).The results show that the key raw material shot blasting process,the crucible of auxiliary materials af⁃ter optimizing the molding temperature to 1580℃,and the casting system with two slag stalls and two filtration systems,all work together to prepare a higher purity of IN792 master alloy,and the purity of the alloy is greatly improved by this mass production process,and the area of slag floating in the alloy is reduced from 2.36%to 0.57%,which is 75.84%less than the same period of the previous year,and the minimum O、N content is as low as 8 ppm.In addition,the mechanical properties of the alloy have been fur⁃ther improved:the high-temperature tensile strength can reach 1164 MPa,which is about 14.1%higher than the customer′s tech⁃nical requirements;the yield strength is 1008 MPa,which is about 18.6%higher;the maximum high-temperature endurance time is up to 136 h,and the enduring elongation is 6.39%.

关 键 词：IN792合金 抛丸 力学性能 熔炼工艺 断口分析 

分 类 号：TG113[金属学及工艺—物理冶金]