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一、序言前文谈到了用皮尔试验评定汽车用高强度薄钢板的点焊性的结果,以及熔核内断裂会受母材化学成份的影响。本文将以化学成份范围比前文更广的试验材料为对象,探讨母材化学成份及拉开强度与 U 字形拉开强度之间的关系。
I. PREFACE The preface mentions the results of using the Peel test to evaluate the spot weldability of high-strength sheet steel for automotive applications, as well as the fracture in the nugget that is affected by the chemical composition of the base metal. In this paper, a wider range of chemical composition than the previous experimental materials as the object, to explore the base metal chemical composition and tensile strength and U-shaped tensile strength relationship.