一、冷轧汽车薄板的性能冷轧汽车薄板,是冷冲复杂复盖零件的,它要求金属在冷状态下具有很大的塑性。深冲性良好的汽车薄板,显微组织是铁素体,晶粒度必须十分均匀。一般只允许两极同时存在。大小混合的晶粒会引起不均匀变形和造成撕裂废品,粗大晶粒组织的冲压件表面呈“橙子皮”状撕裂,太小的晶粒降低冲压值。薄的外复零件是7～8级,厚的隐蔽另件是6～7级。晶粒状 First, the performance of cold-rolled car sheet Cold-rolled car sheet, cold-red complex cover parts, which require metal in a cold state has a great plasticity. Deep drawing good car sheet, the microstructure is ferrite, grain size must be very uniform. Generally only allow both poles exist. Mixed size of the grain will cause uneven deformation and tear caused by waste, coarse grain structure of the stamping parts were “orange peel” -like tear, too small grains reduce stamping value. Thin outer parts are 7 to 8, thick hidden parts is 6 to 7. Grainy