Improving Joint Properties of Friction Welded Joint of High Tensile Steel
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概要
- 論文の詳細を見る
This report describes the improvements in the joint properties of friction welded joint of 780 MPa class high tensile steel. Welded joint made by a continuous drive friction welding machine, the conventional method, had not obtained 100% joint efficiency despite applying forge pressure. This was due to the softening of the welded interface zone for heat input during braking times. Therefore, we developed a continuous drive friction welding machine with an electromagnetic clutch to prevent heat input during braking time. We proposed the process as “The Low Heat Input Friction Welding Method (the LHI method).” In this case, the joint had the same tensile strength as the base metal at friction time when the friction torque reached the initial peak torque. That is, the welded joint obtained 100% joint efficiency by using only the friction stage up to the initial peak torque without the forge (upsetting) stage, despite the existence of a slightly softened region adjacent to the welded interface. Furthermore, the softened region was hardly generated when this joint was made by applying forge pressure at the initial peak torque. In conclusion, a welded joint of high tensile steel made by only the friction stage of the LHI method had excellent joint properties. The LHI method has a lot of advantages for joining such materials as super fine grain steel with which conventional fusion welding processes have difficulty.
- 一般社団法人日本機械学会の論文
- 2005-10-15
著者
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KIMURA Masaaki
Department of Mechanical and System Engineering, University of Hyogo
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KUSAKA Masahiro
Department of Mechanical and System Engineering, University of Hyogo
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FUJI Akiyoshi
Department of Mechanical Engineering, National University Corporation-Kitami Institute of Technology
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Fuji A
Kitami Inst. Technol. Hokkaido Jpn
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Fuji A
Japan Steel Works Ltd. Muroran Jpn
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Fuji Akiyoshi
The Japan Steel Works Ltd. Muroran Plant
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Fuji Akiyoshi
Department Of Mechanical Engineering Faculty Of Engineering National University Corporation-kitami I
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Kusaka Masahiro
Department Of Mechanical And System Engineering Graduate School Of Engineering University Of Hyogo
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Seo Kenji
Department Of Mechanical And System Engineering Graduate School Of Engineering University Of Hyogo
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Kimura Masaaki
Department Of Marine Sciences University Of The Ryukyus
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Seo Kenji
Department Of Dental Anesthesiology Niigata University Graduate School Of Medical And Dental Science
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