本课题针对课题 1 开发的高碳高铬模具钢的基体强韧化、超细化热处理技术，开展“基体强韧化、超细化热处理技术”在精密冲压模具用高碳高铬模具钢Cr12Mo1V1 上的应用和考核验证研究。研究基体强韧化、超细化热处理技术对Cr12Mo1V1 模具钢组织均匀性、晶粒尺寸、碳化物、尺寸变形率及典型力学性能的影响，形成 Cr12Mo1V1 模具钢的基体强韧化、超细化热处理工艺技术；开展基体强韧化、超细化热处理技术在精密冲压模具的应用验证研究。实现精密冲压模具的尺寸精度、使用寿命大幅提升，形成成熟的高精度长寿命精密冲压模具基体强韧化热处理技术规范，建立精密冲压模具的“基体强韧化热处理控制技术”应用示范工程和应用示范基地，实现典型产品的质量达到国际先进水平，满足汽车、电子、机械等行业精密冲压模具需求。 

This subject is aimed at the matrix strengthening and toughening and ultra-fine heat treatment technology of high carbon and high chromium die steel developed in Topic 1, and carries out the application and verification research of "matrix strengthening and toughening and ultra-fine heat treatment technology" on high carbon and high chromium die steel Cr12Mo1V1 for precision stamping die. The effects of matrix strengthening, toughening and ultra-refining heat treatment technology on the microstructure uniformity, grain size, carbide, dimensional deformation rate and typical mechanical properties of Cr12Mo1V1 die steel were studied, and the matrix strengthening, toughening and ultra-refining heat treatment technology of Cr12Mo1V1 die steel was formed; Carry out the application verification research of matrix strengthening and toughening, ultra-fine heat treatment technology in precision stamping dies. The dimensional accuracy and service life of precision stamping dies have been greatly improved, the mature technical specifications for matrix toughening heat treatment of high-precision long-life precision stamping dies have been formed, the application demonstration project and application demonstration base of "matrix toughening heat treatment control technology" of precision stamping dies have been established, and the quality of typical products has reached the international advanced level, meeting the needs of precision stamping dies in automobile, electronics, machinery and other industries.