一、前言 我国所采用的冷冲压模具,绝大部分为钢制结构,制模工艺也比较落后,模具普遍存在着寿命低、精度差的问题。由于大量采用锻铸件,再加上加工设备落后,生产能力较低。为了解决这个难题,我国广大科技人员,进行了大量的试验研究工作,先后搞出了锡铋合金、铅锌合金等低熔点合金模具。近几年通过反复试验,不断改进提高,终于搞成了新型模具材 I. Introduction Cold stamping die used in China, most of the steel structure, mold making process is relatively backward, the mold is generally low life expectancy, poor accuracy. As a result of extensive use of forged castings, coupled with the backward processing equipment, lower production capacity. In order to solve this problem, China’s vast number of scientific and technological personnel, conducted a large number of experimental studies, has worked out tin bismuth alloy, lead-zinc alloy and other low-melting alloy mold. In recent years through repeated testing, continuous improvement and improvement, and finally became a new mold material