短语词组短语marquench rolling 淬火马氏体轧制special marquench 特种分级淬火marquench stressing 加载分级淬火marquench flame hardening 分级火焰淬火法marquench and tempering 分级淬火回火处理utilizes casting remaining heat marquench 利用铸造余热等温淬火 返回 marquench