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对860℃淬火,500℃回火处理后的5CrMnMo模具钢进行了动态断裂韧性试验.讨论了K_(1d)分散大于K_(1c)的原因.
The dynamic fracture toughness tests of 5CrMnMo die steel quenched at 860 ℃ and tempering at 500 ℃ were carried out. The reasons for the dispersion of K 1d over K 1c were discussed.