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近年来随着塑料品种和数量的猛增,对塑料制品模具钢的要求越来越高。国外对塑料模具钢极为重视,从碳素钢发展到合金马氏体时效钢,形成了塑料模具专用钢系列,并还在研究发展中。而我国目前仍以采用45、CrWMn、9Mn2V及Cr12MoV等钢为主,它们的加工性能和使用性能都不能适应塑料制品发展的要求。压制塑料件的模具处于持续或间断的加热状态中,热塑性常规温度在150℃左右,由于热态塑料本身是极韧的物质,致使模具出现严重的磨损。而
In recent years, with the surge of plastic varieties and quantities, the plastic mold steel requirements are getting higher and higher. Foreign plastic mold steel attaches great importance to the development from carbon steel to alloy martensitic aging steel, forming a series of plastic molds for steel, and is still under research and development. In our country, 45, CrWMn, 9Mn2V and Cr12MoV are still used at present. Their processing performance and serviceability are not suitable for the development of plastic products. The mold for pressing plastic parts is in a continuous or intermittent heating state. The conventional thermoplastic temperature is about 150 ° C. Since the hot plastic itself is a very tough material, the mold is severely worn. and