紧急水冷及焊后正火对超细晶粒钢接头热影响区组织与硬度的影响
긴급수랭급한후정화대초세정립강접두열영향구조직여경도적영향
Effects of immediata water cooling and normalization after welding on microstructure and hardness of heat affected zone of ultra-fine grain steels welded joint
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