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一项美国专利介绍了冷挤压超高强度马氏体时效钢的方法,适用于冷挤压反坦克次口径脱壳穿甲弹的弹套。该弹套是用抗拉强度大于140公斤/毫米~2的18％镍马氏体时效钢制成,而且其形状相当复杂,不能用普通冷挤方法成形,故过去采用钢棒机械加工的方法制造,但其问题较多,成本很高。采用该专利提供的方法能成功地冷挤这种弹套,从而可获得显著的经济效盆。
One U.S. patent describes a method of cold extrusion of ultrahigh strength martensitic aged steel for use in cold extrusion of elastomeric shells for an anti-tank sub-caliber APA shell. The shell is made of 18% nickel martensite aged steel with a tensile strength greater than 140 kg / mm ~ 2, and its shape is quite complex and can not be formed by ordinary cold extrusion. Therefore, in the past, the steel rod machining Manufacture, but its problems are more, the cost is very high. The method provided by this patent can successfully cold-squeeze such shells, resulting in significant economic efficiency.