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WANG Chen-xi, WANG Chun-qing, KONG Ling-chao. Mechanism of Ni/NiCr joint formation by parallel micro gap welding[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2004, (4): 99-102.
Citation: WANG Chen-xi, WANG Chun-qing, KONG Ling-chao. Mechanism of Ni/NiCr joint formation by parallel micro gap welding[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2004, (4): 99-102.
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Mechanism of Ni/NiCr joint formation by parallel micro gap welding

  • National Key Laboratory of Advanced Welding Production Technology, Harbin Institute of Technology, Harbin 150001, China

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  • Received Date: July 17, 2003
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  • Ni leads (diameter of 0.15 mm) were welded to NiCr alloy thin film (5 μm thick) with strong current and short duration by method of parallel micro gap welding.A two-dimensional thermal conduction model of welding was developed.It was calculated that the position of top temperature was related to electrode gap.When the gap of two electrodes is greater than a critical gap,the top temperature position is in the middle of the two electrodes.Results show that the temperature in the middle of electrodes reaches the melting point of Ni or NiCr alloy firstly,however there are no nuggets in this position during the welding process.With electrode force,the formation of joint depends on diffusion below the two electrodes.
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