照相机和仪器仪表的冷冲压零件数量多,精度高,几何形状复杂,其中不少零件还要求有较高的强度。过去曾用过多种钢带,如采用退火状态的冷轧中炭钢带,冲压成型后,进行淬火回火热处理。用于热处理的变形和开裂,成品率很低。采用热处理高强度钢带,则由于成型性差,冲压废品率也很高,而且模具磨损严重,最后不得不采用半冷硬钢带。由于方向 Cameras and instrumentation cold stamping parts number, high precision, complex geometry, many of which also require a higher strength. In the past have used a variety of strip, such as the use of annealed cold rolled carbon steel strip, stamping, quenching and tempering heat treatment. For heat treatment deformation and cracking, the yield is very low. The use of heat treatment of high-strength steel strip, then due to poor formability, stamping rejection rate is also high, and severe mold wear, and finally had to use semi-cold steel strip. Due to the direction