观察并研究了不同氧势的退火气氛对中锰合金钢表面氧化物状态和热浸镀锌性能的影响.用合金元素内外氧化理论分析了不同氧势对氧化物形貌的影响,并进一步通过钢板表面氧化物脱落理论以及Bellhouse曾提出的Zn桥理论分析了不同氧化物形貌对热浸镀锌的影响.结果表明:退火气氛中氧势较低时,钢板表面氧化物为颗粒状,较高时以玻璃质的膜状为主,并有部分颗粒状氧化物夹杂.颗粒状氧化物形貌表面更有利于热浸镀锌的发生,其热浸镀板抑制层颗粒出现了分化,有些区域晶粒细小而致密,而有些区域晶粒粗大而稀疏;但玻璃质的膜状氧化物表面热浸镀板抑制层颗粒细小且不连续,生长不充分.
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