Study on microstructure and properties of Stellite powder 3D printing part based on PTA

基于PTA的司太立粉末3D打印件的组织及性能研究 Study on microstructure and properties of Stellite powder 3D printing part based on PTA 陈兴东 CHEN Xingdong 1 2 first-author 杨兴荣 YANG Xingrong 1 2 郭洋 GUO Yang 1 2 王大勇 WANG Dayong 1 2 裴伟平 XIONG Jiankun 1 2 杨德存 PEI Weiping 1 2 XIONG Jiankun YANG Decun 1 2 东方电气集团东方汽轮机有限公司 东方电气集团东方汽轮机有限公司 Dongfang Turbine Co., Ltd., Dongfang Electric Corporation Dongfang Turbine Co., Ltd., Dongfang Electric Corporation 长寿命高温材料国家重点实验室 长寿命高温材料国家重点实验室 State Key Laboratory of Long-Life High Temperature Materials State Key Laboratory of Long-Life High Temperature Materials 采用等离子粉末3D打印技术,通过机器人3D打印进行了司太立桶型零部件的打印实验,试验后对打印件进行射线硬度及解剖分析,结果表明,该方法可获得结构致密无缺陷、硬度均匀的结构件。使用金相显微镜、扫描电镜、高温硬度仪对其试样进行检测分析,结果显示试样组织以枝状晶为主,层与层之间有明显的熔合区;成分均匀无明显偏析;高温硬度分布符合司太立合金高温硬度变化趋势,且在700℃仍能保持较高硬度。通过水蚀实验得出,打印件具有优于常规淬火工艺的良好耐水蚀性能。综合实验结果表明,司太立粉末的等离子打印技术能形成性能可靠的构件,具有能用于生产的巨大潜力。 In this experiment, the 3D printing technology of plasma powder was used to print the Stellite barrel type parts by robot 3D printing. After the experiment, the hardness and anatomy of the printed parts were analyzed. The experimental results show that the structure with dense structure and uniform macro hardness can be obtained by this method. After that, metallographic microscope, scanning electron microscope and high temperature hardness tester were used to test and analyze the samples. The results show that the microstructure of the samples is mainly dendrite, and there are obvious fusion zones between layers. The composition is uniform without obvious segregation. The high temperature hardness distribution accords with the change trend of high temperature hardness of stellite alloy, and the high hardness can be maintained at 700 ℃. The water erosion experiment shows that the printing part has better water corrosion resistance than the part obtained by conventional quenching process. The comprehensive experimental results show that the plasma printing technology of Stellite powder can form reliable components and has great potential for production. PTA 3D打印 司太立粉末 PTA 3D printing Stellite powder TG146.16;TP391.73 2022-03-08 9 51