汽车稳定杆用55Cr3盘条的脱碳缺陷改善  

Improvement of decarbonization defect of 55Cr3 wire rod for automobile stabilizer bar

作　　者：曹树卫 马志军[1] 郭存涛 蒲洪波 CAO Shuwei;MA Zhijun;GUO Cuntao;PU Hongbo(Jiangsu Yonggang Group Co.,Ltd.,Zhangjiagang 215628,China)

机构地区：[1]江苏永钢集团有限公司,江苏张家港215628

出　　处：《物理测试》2025年第1期40-44,共5页Physics Examination and Testing

摘　　要：汽车稳定杆存在表面缺陷,能导致汽车性能降低、甚至发生平衡杆断裂事件,严重影响汽车行驶安全。某厂生产的55Cr3材质盘条,在汽车配件厂检测时,发现轧制的高线盘条表面存在一定深度的脱碳缺陷。盘条生产厂通过优化控轧、控冷工艺,降低钢坯在加热炉的加热温度,将均热段控制温度中线由原来的1080℃降低到1020℃;调整加热炉气氛,将空燃比由原来的0.75%调整为0.55%;降低盘条吐丝温度和风冷线辊道运行速度,将入口段速度由0.12 m/s提高到0.13 m/s,并实施不同比例的辊道速度级联递增,适当提高相变区的冷却速度,得到没有脱碳缺陷的盘条,满足了客户的产品性能要求。The surface defects in automobile stabilizer rod could lead to the performance deterioration of automobile and even cause the breaking of balance rod,which seriously affect the safety of automobile driving.The 55Cr3 wire rod produced in a certain factory was tested in one automobile parts factory,and it was found that there were some deep decarbonization defects on the surface of the rolled high wire rod.The process of controlled rolling and controlled cooling were optimized,the heating temperature of the billet in heating furnace was reduced,and the control temperature center line of soaking section was reduced from the original 1080℃to 1020℃.The heating furnace atmosphere was adjusted,and the air-fuel ratio was adjusted from the original 0.75%to 0.55%.The spinning temperature of the wire rod and the running speed of the air-cooled roller were reduced,and the speed of the entrance section was increased from 0.12 m/s to 0.13 m/s.The cascade increase of the roller speed in different proportions was implemented,and the cooling speed in the phase change zone was appropriately increased.Finally,the wire rod without decarbonization defect was obtained,which could meet the product performance requirements for customer.

关 键 词：汽车稳定杆 55Cr3 盘条 表面缺陷 脱碳缺陷 

分 类 号：U463.33[机械工程—车辆工程]