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由上海钢铁研究所研制的“热塑性塑料模具钢”,于1986年5月27日在杨州市通过部级技术鉴定。研究成的新钢种S_(M1),S_(M2)是易切削类型的调质预硬化和时效硬化型的热塑性塑料模具专用新材料,但它在胶木线路,板冲孔模,精密冲模,导向卸料板,热固性模具等方面也取得了较好的使用效果。供应的模坯可不再进行热处理,直接加工成模具,改革了现行模具
Developed by the Shanghai Institute of Iron and Steel “thermoplastic mold steel”, on May 27, 1986 in Yangzhou City through ministerial-level technical appraisal. The new steel grades S_ (M1) and S_ (M2) which are studied are cutting-ready new materials for tempering pre-hardened and age-hardened thermoplastic molds, but they are widely used in bakelite lines, plate punching dies, precision punches, Directional discharge plate, thermosetting molds, etc. have also made good use of the results. The supply of mold blanks can no longer be heat treatment, directly processed into molds, the reform of the existing mold