兩段脈衝電阻點銲對雙相鋼DP980之影響

Hwa Teng Lee, Yuan Chih Chang

研究成果: Article同行評審

摘要

Multi-step resistance spot welding is an emerging method for the automotive industry that is distinct from conventional one-step resistance spot welding. In this study, one- and two-step resistance spot welding processes were interrogated with respect to tensile-shear tests, weld nugget sizes, hardness distributions, microstructures, and failure modes for different welding parameters. Experimental results reveal that welding nugget size for two-step resistance spot welding was larger than that for one-step resistance spot welding regardless of the welding current. The tensile shear load capacity and the fracture energy for two-step resistance spot welding were better than that for one-step resistance spot welding at lower welding currents. By comparison, at higher welding currents, the tensile shear load capacity and fracture energy were identical for both welding processes because of softening that arises from the higher heat input. Analyses of hardness and microstructure demonstrated that the weldments softened in the partially melted and sub-critical heat-affected zones. Failure mode also depended on the number of pulses that were applied. This study establishes that two-step resistance spot welding increases the extent of softening and alters mechanical properties versus one-step welding due to the greater heat input in the two-step process, especially at higher welding currents.

貢獻的翻譯標題Effects of Double Pulse Resistance Spot Welding on DP980 Dual Phase Steel
原文???core.languages.zh_TW???
頁(從 - 到)235-244
頁數10
期刊Journal of the Chinese Society of Mechanical Engineers, Transactions of the Chinese Institute of Engineers, Series C/Chung-Kuo Chi Hsueh Kung Ch'eng Hsuebo Pao
42
發行號3
出版狀態Published - 2021 6月

All Science Journal Classification (ASJC) codes

  • 機械工業

指紋

深入研究「兩段脈衝電阻點銲對雙相鋼DP980之影響」主題。共同形成了獨特的指紋。

引用此