结果显示：离子渗氮可以大幅度改善挤压模具钢的高温耐磨性。
The results show that the plasma nitriding can improve the wear resistance of H13 die steel at high-temperature.
国产新型塑料模具钢主要有预硬钢、时效硬化钢、淬火——回火钢、冷挤压成型模具钢、耐蚀钢等类型。
The new domestic - developed plastic mould steels include prehardening steel . age hardening steel, quenching-tempering steel, cold -forming steel, and anti - corrosion steel, etc.
在制造热挤压模具的过程中，所用的模具钢rm - 2在淬火过程中发生了淬火开裂。
While manufacturing a hot-extrusion die made of RM-2 hot working die steel, quenching cracks was found during the quenching process.
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