张佳奇,宋新莉,贾涓,陈天宇,葛锐

• 1:武汉科技大学省部共建耐火材料与冶金国家重点实验室

摘要(Abstract)：

新能源汽车电池壳用无间隙原子(IF)钢不仅要求有一定的强度，而且需要优异的深冲性能，因此需要优化退火工艺参数，控制组织织构演变以获得对深冲性能有利的{111}面织构与高强度。对厚度为0.30 mm的电池壳用IF钢冷轧板在720～810℃进行再结晶退火3 min,借助光学显微镜、电子背散射衍射(EBSD)技术和万能拉伸试验机等分析了退火IF钢的组织、织构、屈服强度、抗拉强度、塑性应变比r值与应变硬化指数n值，研究不同温度退火对IF钢组织、织构及力学性能等的影响规律与机理。结果表明：冷轧板晶粒沿轧制方向拉长，冷轧板在720～810℃退火3 min后，均得到等轴状铁素体，平均晶粒尺寸由8.43μm增大至11.64μm。冷轧IF钢退火后得到强的{111}面织构，主要由{111}<110>和{111}<112>两类取向晶粒组成，其含量随着退火温度的升高而增加。在780℃退火时由于部分{110}<001>织构吞噬{111}<110>、{111}<112>织构，导致{111}织构发生突降。随退火温度的升高，IF钢的屈服强度与抗拉强度下降；0°、45°与90°方向的塑性应变比r值增大，各向异性Δr值增大。

关键词(KeyWords)： 无间隙原子钢;织构;塑性应变比;退火温度

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51101114)

作者(Author): 张佳奇,宋新莉,贾涓,陈天宇,葛锐

DOI: 10.13289/j.issn.1009-6264.2023-0184

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