Abstract:The parameters for evaluating the surface quality of coldrolled automobile plate includes roughness, waviness and PC values. And the main parameters for evaluating the surface quality of the car plate after coating are orange peel, bright mirror, long wave and short wave, etc. The wavelength of the surface roughness of coldrolled steel sheet is obviously different before and after painting. The percentage of the short wavelength of the surface roughness of coldrolled steel sheet is in a dominant position before painting, which is almost disappeared after painting. While the long wavelength parts still remain and dominate. According to the surface accumulated burl defects strongly affecting the coating reflected by car companies, the accumulated burl type and the root cause of defect formation were comprehensively analyzed. Through lowering into the zinc pot plate temperature, the matching of the zinc pot and zinc pot temperature was optimized. By improving the zinc aluminum content, the Fe content in zinc pot was controlled in a very low scope, which radically suppressed the formation of the zinc granule. And therefore, the defect ratio of zinc grain was effectively reduced, the repair rate of motor corporations was decreased, the requirement of the dragon 2C1B coating process was satisfied.
胡华东. 冲压“积瘤”对汽车外板涂装影响及对策分析[J]. 中国冶金, 2018, 28(8): 28-31.
HU Huadong. Impact of stamping on automobile outer panel coating and analysis of countermeasures[J]. China Metallurgy, 2018, 28(8): 28-31.