理化检验-物理分册2024，Vol.60Issue(8)：10-15,6.DOI:10.11973/lhjy-wl230234
汽车车轮用高扩孔率热轧复相钢带的研制
Development of high hole-expanding ratio hot-rolled complex phase steel for automotive wheels
左鹏 1管传华 1邬晓燕 1许鹤君2
作者信息
- 1. 宁波钢铁有限公司 技术中心,宁波 315807
- 2. 上海材料研究所有限公司检测中心,上海 200437
- 折叠
摘要
Abstract
A micro-alloyed hot-rolled complex phase steel with high porosity for automobile wheels was designed and industrially trial-produced.The microstructure and mechanical properties of hot rolled multiphase steel with high hole expansion rate were studied by means of metallographic examination and mechanical properties test.The results show that the microstructure of the trial product was mainly composed of bainite and ferrite,and a small amount of martensite,retained austenite and dispersed second phase particles were also distributed.The yield strength,tensile strength and elongation of the product exceed 520,610 MPa and 24%,respectively.The yield ratio was 0.85～0.87,the hole expansion rate was more than 83%,and the hole expansion rate along the width of the plate fluctuated within 10%.Increasing the content of Si element could significantly improve the hole expansion performance and affect the surface quality of the product.It was more appropriate to control the mass fraction of Si element at about 0.20%.The trial product had excellent local formability,good fatigue resistance and welding performance.Under the condition of fatigue test bearing capacity of 1 700 N·m,the bending fatigue life of the wheel reached more than 600 000 times.关键词
热轧复相钢带/高扩孔率/汽车车轮/显微组织/力学性能/扩孔率/疲劳寿命Key words
hot-rolled complex phase steel strip/high hole expansion rate/car wheel/microstructure/mechanical property/reaming rate/fatigue life分类
矿业与冶金引用本文复制引用
左鹏,管传华,邬晓燕,许鹤君..汽车车轮用高扩孔率热轧复相钢带的研制[J].理化检验-物理分册,2024,60(8):10-15,6.
