一、引言真空淬火工艺已经广泛地应用到高速工具钢、模具钢、弹簧钢、马氏体不锈钢、各种结构钢零件,以及各种有色金属及其合金,如钛、铍青铜,各种精密合金等。因此,真空淬火炉发展相当迅速。近十几年来,为解决真空气淬的冷却速度问题,在不断提高淬火压力,已经从压力低于0.1MPa
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