LIU Xiangyu, WANG Chenyang, JING Zhicheng, et al.Study on Microstructure and Properties of TC4 Titanium Alloy Fabricated by Laser Additive Manufacturing and Hot Rolling[J].Electric Welding Machine, 2022, 52(5): 99-105.
LIU Xiangyu, WANG Chenyang, JING Zhicheng, et al.Study on Microstructure and Properties of TC4 Titanium Alloy Fabricated by Laser Additive Manufacturing and Hot Rolling[J].Electric Welding Machine, 2022, 52(5): 99-105. DOI: 10.7512/j.issn.1001-2303.2022.05.14.
Study on Microstructure and Properties of TC4 Titanium Alloy Fabricated by Laser Additive Manufacturing and Hot Rolling
Laser additive manufacturing and hot rolling composite manufacturing of titanium alloy parts can effectively improve the utilization rate of raw materials and improve the production efficiency of the whole parts. In this paper, TC4 was deposited on TC4 hot-rolled sheet by laser coaxial powder feeding technology, and the microstructure and properties of TC4 samples were analyzed by stereo microscope, optical microscope, scanning electron microscope, Vickers hardness tester and universal testing machine. The results show that there are hot rolled plate region, bonding region and deposition manufacturing region in the composite fabricated TC4 samples. The hot rolled plate region and bonding region are mainly composed of equiaxed grains, while the deposition manufacturing region is composed of epitaxial columnar grains. The Vickers hardness of bonded area is about 375 HV, which is slightly higher than that of hot rolled area (340 HV) and deposited area (355 HV). The tensile properties of composite fabricated specimens in vertical deposition direction (1 029.0 MPa) are better than those in parallel deposition direction (955.0 MPa), and the elongation in parallel deposition direction (19.8%) is better than that in vertical deposition direction (12.0%).
关键词
TC4钛合金激光沉积制造热轧复合制造显微组织力学性能
Keywords
TC4 titanium alloylaser additive manufacturinghot rolling manufacturingmicrostructuresmechanical properties
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