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综述了高速钢表面氧化膜形成的机理及剥落行为。通过改变氧化温度、氧化时间及氧化介质,得到高速钢轧辊在不同条件下的氧化行为。高速钢轧辊中主要的3种碳化物MC,M7C3及M2C氧化抗性依次升高,但都低于基质。水蒸气能细化氧化晶粒,提高氧化速率。氧化膜的剥落过程是内外应力的联合作用形成的,在生长过程中会在长大应力和热应力作用下开裂。根据对氧化膜形成及剥落过程的研究,优化高速钢轧辊的氧化过程,使之更好地应用到生产中。
The formation mechanism and flaking behavior of high speed steel surface oxide film are reviewed. By changing the oxidation temperature, oxidation time and oxidation medium, the oxidation behavior of HSS roll under different conditions was obtained. The oxidation resistance of the three main carbides MC, M7C3 and M2C in high speed steel roll increased successively, but both were lower than the matrix. Water vapor can refine the oxide grains and increase the oxidation rate. Oxide film peeling process is a combination of internal and external stress formed in the growth process will grow under the stress and thermal stress cracking. According to the formation and exfoliation process of oxide film, the oxidation process of HSS roll is optimized to make it better applied to the production.