500 MPa Nb-Ti微合金高强度汽车车轮钢510CL开发和使用性能  

Development and Application Performance of 500 MPa Nb-Ti Microalloying High Strength Steel 510 CL for Auto Wheel

作　　者：肖尧[1] Xiao Yao(Institute of Vanadium and Titanium Steel,Pangang Group Research Institute Co Ltd,Panzhihua 617000)

机构地区：[1]攀钢集团研究院有限公司钒钛钢研究所,攀枝花617000

出　　处：《特殊钢》2018年第6期62-65,共4页Special Steel

摘　　要：开发试验的510CL钢(/%:0. 08C,0. 07Si, 1. 25Mn,0. 008P,0. 005S,0. 023Nb,0.018Ti)经半钢脱硫-200 t顶底复吹转炉-LF-230 mm×1 650 mm板坯连铸-连轧成5. 0 mm板。为了保证车轮钢具有良好的焊接性能,采用了低碳Nb-Ti微合金化,并结合TMCP(热机械控制轧制工艺)技术开发出500 MPa高强度车轮钢。试验钢的扩孔率超过100%和焊接性能良好,其冷成形性能和疲劳寿命均达到用户的技术指标,使用后试验钢达到设计要求。The 5.0 mm strip of developed tested steel 510CL （/% ： 0.08C, 0. 07Si, 1.25Mn, 0. 008P, 0. 005S, 0. 023Nb, 0. 018Ti） is produced by semi-steel desulphurization- 200 t top and bottom combined blowing eonverter-LF-230 mm × 1 650 mm slab casting-continuous rolling process. In order to ensure the better welding performance of wheel steel, the 500 MPa high strength wheel steel is developed by low carbon Nb-Ti microalloying combined TMCP （Thermo-Mechanical Control Process） technology. The hole-expansion rate of tested steel is more than 100%, the welding performance is better, the cold-forming performance and the fatigue life of steel all meet the user technical index, and after application the test steel is up to design requirement.

关 键 词：500 MPa车轮钢 疲劳寿命 扩孔性能应用 

分 类 号：TF71[冶金工程—钢铁冶金] TF777