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Effect of forced cooling on weld appearance and microhardness of electron beam welded QCr0.8 alloy |
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| Authors: | Wang Houqin Zhang Binggang Wang Ting Chen Guoqing Feng Jicai and Li Ruishan |
| Affiliation: | State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin, 150001.,State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin, 150001.,State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin, 150001.,State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin, 150001.,State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin, 150001. and State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin, 150001. |
| Abstract: | Electron beam welding of QCr0.8 chromium bronze was investigated to improve weld appearance and reduce the size of softened zone of the joints. Effect of forced cooling on weld appearance and microhardness of the joints was studied by both experiment and numerical simulation. Both welding with and without forced cooling were conducted and analyzed comparatively. The results showed that a quasi steady state temperature field and a large temperature gradient perpendicular to welding direction could achieved by forced cooling. A consistent weld width throughout the entire weld and smooth surface for both the top and bottom was achieved by forced cooling process. The width of softened zone of the joint was reduced from 2.6 mm to 1 mm by forced cooling. |
| Keywords: | QCr0 8 alloy electron beam welding forced cooling temperature field |
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