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我厂与一机部上海材料研究所、华中工学院、上海钢铁研究所等单位协作,选择了切边模、活塞销冲头等模具对四种新型模具钢进行了对比试验,就其热加工工艺、机加工工艺性能及使用情况作了对比试验。65Nb钢加工性能与韧性较好,尤其适用于冷挤成型的模具。LD_1钢机加工性一般,但强度高、耐磨性好。总之,四种新型模具钢用于螺钉切边模寿命比原高碳高铬铜Cr12MoV提高1～2.5倍。
I plant and a machine department of Shanghai Institute of Materials, Huazhong Institute of Technology, Shanghai Institute of steel and other units in collaboration with the choice of the trimming die, piston pin punches and other die on the four new die steel were compared tests on its thermal processing technology , Machining performance and use of the situation made a comparative test. 65Nb steel processing performance and toughness is better, especially for cold extrusion molding. LD_1 steel machinability in general, but high strength, good wear resistance. In short, the four new die steel for screw trimming die life than the original high-carbon high-chromium Cr12MoV increased by 1 to 2.5 times.