不同铝硅镀层厚度的热成形钢应用性能对比研究  

Comparative Study on the Application Properties of Hot-Formed Steel with Different Thicknesses of Al-Si Coating

作　　者：曹广祥 张华 赵冉 高帅鹏 范喜龙 刘丰宁 Cao Guangxiang;Zhang Hua;Zhao Ran;Gao Shuaipeng;Fan Xilong;Liu Fengning(Global R&D Center,China FAW Corporation Limited,Changchun 130013;National Key Laboratory of Advanced Vehicle Integration and Control,Changchun 130013;Engineering and Technology Department of FAW Co.,Ltd.,Changchun 130000)

机构地区：[1]中国第一汽车股份有限公司研发总院,长春130013 [2]高端汽车集成与控制全国重点实验室,长春130013 [3]中国第一汽车股份有限公司工程技术部,长春130000

出　　处：《汽车工艺与材料》2024年第12期44-49,共6页Automobile Technology & Material

摘　　要：为评价薄铝硅镀层热成形钢在汽车车身上应用的可行性,对铝硅镀层质量(单面)分别为20 g/m^(2)(AS20)、75 g/m^(2)(AS75)的材料进行热冲压试验、点焊试验、胶粘匹配性试验、油漆配套性及耐腐蚀性试验。结果表明,AS20材料可使用与AS75材料相同的加热温度,但加热时间需低于AS75材料,在最佳加热工艺下2种材料的力学性能相当,AS20材料的极限尖冷弯角及峰值载荷力高于AS75材料;2种材料与现生产用结构胶粘剂胶粘接头的剪切强度相当,AS20材料与现生产用结构胶粘剂匹配良好;2种材料所在焊接总成的全破坏焊点剥离直径、焊点熔核直径及其失效模式均相当,AS20材料的点焊可焊性与AS75材料相当;2种材料的电泳漆膜的附着力和耐腐蚀性能相当。综上,基于多性能对比测评分析,薄铝硅镀层热成形钢主要应用性能均满足使用需求。In order to evaluate the feasibility of the application of thin Al-Si coated hot formed steel in automobile body,hot stamping test,spot welding test,adhesive matching test and coating test and corrosion resistance test are carried out on single-sided Al-Si coated materials with the weight of 20 g/m^(2)(AS20)and 75 g/m^(2)(AS75).The results show that:AS20 material can use the same heating temperature as the AS75 material,but the heating time is less than the AS75 material;under the optimal heating process,the mechanical properties of the two materials are comparable;the ultimate sharp cold bending angle and maximum force of the AS20 material are higher than those of the AS75 material;the shear strengths of the adhesive joints between the two materials and the structural adhesive currently used in production are comparable,the AS20 material matches well with the structural adhesive currently used in production;the peeling diameter of the fully damaged welding point and the fusion diameter and failure mode of the welding assembly where the two materials are located are equivalent,the spot weldability of the AS20 material is equivalent to that of the AS75 material;the adhesion and corrosion resistance of the electrophoretic paint film of the two materials are comparable.Overall,based on multi-performance comparative evaluation analysis,the main application properties of thin aluminum silicon coated hot formed steel meets the using requirements of OEMs.

关 键 词：铝硅镀层 热成形钢 加热工艺 点焊质量 耐腐蚀性能 

分 类 号：U465[一般工业技术—材料科学与工程]