Resistance Spot Weldability of Comparatively Thick C-Mn-Cr-Mo Dual Phase Steel Sheet
Resistance Spot Weldability of Comparatively Thick C-Mn-Cr-Mo Dual Phase Steel Sheet
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DOI：
10.2355/isijinternational.30.233
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发表时间：
1990-03
影响因子：
1.8
通讯作者：
P. K. Ghosh;P. Gupta;R. Avtar;B. Jha
中科院分区：
文献类型：
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作者：
P. K. Ghosh;P. Gupta;R. Avtar;B. Jha
采用电阻点焊工艺对较厚（4 mm）的C-Mn-Cr-Mo双相钢进行了焊接。通过改变电极压力和影响焊接热输入的主要焊接工艺参数，如有效电流和焊接时间，研究了该钢的焊接性。研究了这些焊接工艺参数对接头形貌、显微硬度和拉伸剪切强度的影响。获得了接头强度最大的最佳焊接工艺参数为：电极力615 kg，有效电流6 kA，焊接时间80次。在最佳焊接条件范围内，未观察到焊接热影响区外部区域马氏体过度回火引起的焊件弱化现象。
Welding of comparatively thick (4 mm) C-Mn-Cr-Mo dual phase steel has been carried out by resistance spot welding process. Weldability of this steel has been studied by varying the electrode force and the primary welding parameters affecting the heat input such as the effective current and weld time. The influence of these welding parameters on the morphology, microhardness and the tensile shear strength of the weldment are investigated. Optimum welding parameters producing maximum joint strength are established as electrode force of 615 kg, effective current of 6 kA and weld time of 80 cycle. Weakening of weldment caused by excess tempering of martensite at the outer region of HAZ was not observed in the range of optimum welding conditions.