随着机械工业生产的高速度发展和技术水平的提高,少无切削冷作加工新工艺及新设备也日益发展和广泛应用。由于工艺设备能力和生产速度的提高,难成型加工材料的不断出现和零件几何形状、尺寸的日益变化和增大,对配套使用的模具性能和寿命,提出了愈来愈高的要求。而原用模具材料及热处理工艺已不能很好的适应这些发展的需要,因此模具使用寿 With the rapid development of machinery industry and the improvement of technology, fewer non-cutting cold-working new processes and new equipment are also increasingly developed and widely used. Due to the improvement of process equipment capability and production speed, the continuous emergence of difficult molding materials and the increasingly changing and increasing size and shape of parts have raised the higher and higher requirements on the performance and life of the molds used together. The original mold material and heat treatment technology has not been well adapted to the needs of these developments, the mold life