基于多指标综合评分方差分析的镍铬合金储能缝焊工艺研究

doi:10.11896/cldb.20040163

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Abstract The condenser discharge seam welding (CDSEW) experiment of Cr20Ni80 nickel chrome alloy with thickness of 0.5 mm was carried out by ta-king the weighted comprehensive score of tensile shear force, overlap and penetration rate of the joint as the quality index. The influence of welding speed, discharge frequency and energy storage on the quality of seam welding joint was studied by multi-index comprehensive score analysis of variance (ANOVA), and the specimen was observed by metallography. The results show that the welding speed has a significant impact on the quality of nickel chrome alloy CDSEW joint, and the energy storage has a certain effect on the joint quality, but the discharge frequency has no significant impact on the quality of the joint. The higher the welding speed, the lower the failure energy and the worse the plastic deformation ability of the joint is. Under the optimal process combination, the comprehensive score value of three indicators is 0.978, corresponding tensile shear force is 4.971 kN, overlap is 45.8%, and penetration rate is 63.7%. There is no phase transformation in the weld process of nickel chrome alloy, the whole joint is single-phase austenite solid solution structure, the weld nugget zone is uniform and the grains are distributed in dendrite.

Key words： condenser discharge seam welding(CDSEW) nickel chromium alloy weighted comprehensive score analysis of variance (ANOVA)

Published: 03 August 2021

CLC number:

TG453+.9

About author:: Runhua Yi received his M.S. degree in June 2011 from Nanchang Hangkong University in material processing engineering. He is currently a lecturer in Nanchang Hangkong University, mainly engaged in the research and development of resistance welding technology and intelligent equipment.

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	YI Runhua
	DENG Lipeng
	CHENG Donghai
	LIU Fencheng

Cite this article:

YI Runhua,DENG Lipeng,CHENG Donghai, et al. Study on Condenser Discharge Seam Welding Technology of Nickel-Chrome Based on Variance Analysis of Multi-index Comprehensive Score[J]. Materials Reports, 2021, 35(14): 14161-14165.

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http://www.mater-rep.com/EN/10.11896/cldb.20040163 OR http://www.mater-rep.com/EN/Y2021/V35/I14/14161

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