新型高强塑积富B-Al合金的电阻点焊熔核飞溅研究  

Nugget Expulsion of Resistance Spot Welding of New High-Strength Plasticity B-Al-Rich Alloy

作　　者：贺优优 刘伟杰[1] He Youyou;Liu Weijie(Northeastern University Research Academy,Shenyang 110819,China;Shenyang University of Technology,Shenyang 110870,China)

机构地区：[1]东北大学研究总院,辽宁沈阳110819 [2]沈阳工业大学,辽宁沈阳110870

出　　处：《稀有金属材料与工程》2018年第8期2404-2410,共7页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(51034009)

摘　　要：通过自行设计配比一种新型高强塑积富B-Al合金材料。考虑到该种合金材料主要用于乘用车结构件,因此着重研究电阻点焊焊接性。同时借鉴国际焊接性评判标准ISO 14327-2004,设计了复杂焊接条件下的混合水平均匀设计实验。找出了影响该材料点焊熔核飞溅的主要工况因素,并通过建立点焊熔核飞溅边界曲线,从而有效地预测该材料点焊飞溅概率,更进一步地了解点焊熔核质量及点焊飞溅现象与焊接工艺、焊接环境等因素的相互关系,通过建立该材料点焊熔核力矩平衡方程与熔核膨胀应力数值仿真,深入分析点焊飞溅机理,在一定程度上促进了该新型高强塑积合金的实际应用。A new B-Al-rich steel with high-strength and plasticity was developed and its resistance spot welding （RSW） performance was studied when used as the structure materials of automobiles. The hybrid orthogonal experiments of complex welding conditions were implemented under the ISO14327-2004 standard and the main factors that can influence the spattering of nuggets were found. The boundary curves of nugget-spatter lobe diagram that could effectively predicate the expulsion rate of the developed steel were also drawn. The relationships among the nugget size, spatter, welding process and environments were further understood, A moment balance function of nugget was developed and the function-based numerical simulation for the coefficient of swelling stress was conducted. Therefore, the further understood spatter mechanism promotes the engineering application of the developed hot-stamped steels.

关 键 词：高强塑积 电阻点焊 熔核飞溅 Logistic回归 

分 类 号：TG146.21[一般工业技术—材料科学与工程]