摘要: |
采用ELA-30中压型电子束焊机对Ti60钛合金进行焊接,并对其接头显微组织和力学性能进行了研究。结果表明:Ti60钛合金可焊性良好,选择合适的工艺参数能达到优质的接头;其焊缝显微组织主要为针状细小的α'马氏体及片状的初生α组织,母材显微组织为等轴组织初生α+片层β转变组织;其接头断裂的断口面主要表现为韧性断裂;焊缝区域的显微硬度稍高于基体;室温抗拉强度达到母材的95.7%,冲击韧度达到母材的64%;600℃下接头抗拉强度达到母材的91.7%。 |
关键词: Ti60钛合金;电子束焊接;显微组织;力学性能 |
基金项目: |
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Properties and Microstructure of Welding Joint ofTi60 Titanium Alloy Electron Beam |
Yu Huai Yuan Hong Wang Jinxue Cai Jianming
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Beijing Institute of Aeronautical Materials, Beijing 100095
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Abstract: |
Ti60 titanium alloy was welded by ELA-30 electron beam welder of medium voltage, and microstructure and mechanical property of joint were researched. The result shows that: Ti60 has good weld ability. It can reach to high quality joint when choose appropriate technological parameter; its microstructure of welding joint mainly is tiny needle-like α' martensite and sheet primary α texture, base microstructure is equiaxial texture primary α and sheet β transform texture; its fracture surface of joint mainly is ductile fracture; the microhardness of weld seam is slightly higher than base part; tensile strength of room temperature reach to 95.7% of base material, impact toughness is 64% of base material and tensile strength of joint under 600℃ is 91.7% of base material. |
Key words: Ti60 titanium alloy;electron beam welding;microstructure;mechanical property |