摘要
High-strength steel is currently one of the main material choices for creating lightw eight automobiles. To realize lighter wheels that can comply with harsh fatigue requirements,sufficient know ledge of the relevant material fatigue properties is required. Fatigue tests were conducted on Baosteel＇s 600 M Pa level dual-phase steel DP600,which is a typical high-strength hot-rolled steel for steel wheel,and on 550 M Pa level HR60. Whler（ S-N） fatigue curves were obtained for both steels,and the measured stress fatigue limits were 414 and 329 M Pa for the HR60 and the DP600,respectively.
High-strength steel is currently one of the main material choices for creating lightw eight automobiles. To realize lighter wheels that can comply with harsh fatigue requirements,sufficient know ledge of the relevant material fatigue properties is required. Fatigue tests were conducted on Baosteel＇s 600 M Pa level dual-phase steel DP600,which is a typical high-strength hot-rolled steel for steel wheel,and on 550 M Pa level HR60. Whler（ S-N） fatigue curves were obtained for both steels,and the measured stress fatigue limits were 414 and 329 M Pa for the HR60 and the DP600,respectively.
