唐炳涛,原政军,张保仪,谢晖

• 1:山东建筑大学工程力学研究所
• 2:湖南大学汽车车身先进设计制造国家重点实验室
• 3:山东建筑大学机电工程学院
• 4:山东建筑大学材料科学与工程学院

摘要(Abstract)：

用质子光谱仪、光学显微镜、维氏硬度计等手段研究低合金高强钢B340LA与超高强硼钢B1500HS激光拼焊板焊接后的热冲压淬火特性。结果表明,拼焊板母材B340LA钢随着冷却速度的增加其相变点发生偏移,维氏硬度略有增加。拼焊板母材B1500HS钢随着冷速的增加硬度迅速提高。光学显微镜观察,当冷速超过30 K/s时母材B1500HS钢基本转化为马氏体组织。通过维氏硬度计测量,发现焊缝至母材过渡区硬度值平滑过渡,保证母材及焊缝力学性能良好的连续性。由于热冲压淬火后母材及焊缝区域显微硬度平滑过渡,应力应变分别更趋均匀,可显著提高低合金高强钢与超高强硼钢激光拼焊板拉深成形性。

关键词(KeyWords)： 低合金高强钢;硼钢;拼焊板;热冲压;淬火

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51005137/51175302);; 中国博士后特别资助(201104585);; 山东省自然科学基金(ZR2010EQ025);; 汽车车身先进设计制造国家重点实验室开放基金(31015004);; 教育部“新世纪优秀人才”支持计划(NCEF12-1028)

作者(Author): 唐炳涛,原政军,张保仪,谢晖

DOI: 10.13289/j.issn.1009-6264.2013.02.014

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