等离子电弧增材TA15钛合金组织与性能研究  

Study on microstructure and properties of TA15 titanium alloy fabricated by plasma arc additive manufacturing

作　　者：张明朗 柏关顺 李承德 陈振文 丰生荣 明珠[1] 王伟 ZHANG Ming-lang;BAI Guan-shun;LI Cheng-de;CHEN Zhen-wen;FENG Sheng-rong;MING Zhu;WANG Wei(Ningbo Branch of China Academy of Ordnance Science,Ningbo 315048,China;School of Materials Science and Engineering,Nanjing University of Science and Technology,Nanjing 210094,China)

机构地区：[1]中国兵器科学研究院宁波分院,浙江宁波315048 [2]南京理工大学材料学院,江苏南京210094

出　　处：《重型机械》2022年第6期44-47,共4页Heavy Machinery

摘　　要：采用等离子电弧增材制造技术制造了TA15钛合金直壁构件,并对其不同区域的组织特征及拉伸性能进行了研究。结果表明,在电弧增材制造过程中,受热输入、热循环及冷却速度的影响,构件不同区域组织存在明显不同,主要有针、片状α、针状马氏体α′、网篮组织、魏氏组织及大等轴原始β晶。中、下层存在短棒状α,为初生α。拉伸数据显示,垂直于焊缝方向与平行于焊缝方向性能不同,存在明显各向异性。The TA15 titanium alloy straight wall was fabricated by plasma arc additive manufacturing technology, and its microstructure characteristics and tensile properties in different regions were studied. The results show that when the process of arc additive manufacturing, affected by heat input, thermal cycle and cooling rate, the structure of different regions of the component is significantly different, mainly including needle and lamella α, acicular martensite α′, basket structure, widmanstaten structure, and large equiaxed primary β crystals. There are short rod-shaped α in the middle and lower layers, which are primary α. Tensile data show that the properties are different in the direction perpendicular to the weld seam and parallel to the weld seam, and there is a significant anisotropy.

关 键 词：电弧增材制造 钛合金 微观组织 拉伸性能 

分 类 号：TG166.5[金属学及工艺—热处理]