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本文针对目前常用的马氏体型热作模具钢尚不能满足使用温度超过700℃的要求,提出了把奥氏体钢作为700～850℃之间使用的热作模具钢的设想,并对高锰-钒系奥氏体钢进行了初步的研究与探讨。 研究指出:该钢经最佳工艺固溶与时效后具有高的高温强度与硬度,尤其是在700℃以上显著地高于一般热作模具钢3Cr2W8V,同时也具有较好的韧性与塑性。作铜合金热挤压模具的初步使用表明,模具寿命可比3Cr2W8V钢提高5～6倍,经济效益显著。 研究结果表明:高锰-钒系奥氏体钢是一种在700℃以上高温下使用时很有发展前途的热作模具钢。
In this paper, the commonly used martensitic hot-work die steel can not meet the requirements of using temperature above 700 ℃. The idea of using austenitic steel as hot work die steel between 700 ~ 850 ℃ is proposed. - Vanadium austenitic steel for a preliminary study and discussion. The research shows that the steel has high high temperature strength and hardness after solution and aging by the best process, especially higher than 700 ℃ above the common hot work die steel 3Cr2W8V, also has good toughness and plasticity. The initial use of copper alloy hot extrusion die shows that die life can be increased by 5 ~ 6 times than 3Cr2W8V steel, with significant economic benefits. The results show that the high manganese - vanadium austenitic steel is a hot work die steel with a promising future when used at temperatures above 700 ℃.