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在高温空气中加热的金属,因氧而造成金属表面氧化、脱碳。使金属的疲劳、强度、冲击、耐磨等性能下降,影响了零件使用寿命。这种缺陷虽可用盐浴、真空、可控加热来克服,但因投资昂贵,操作复杂,控制困难,而不能广泛应用。由此,我厂与西安油膝总厂共同研制了一种3号热处理保护涂料,作金属热处理无氧化保护用。经生产实践证实,热处理后的金属表面可达到无氧化、少脱碳或不脱碳。在热处理过程中,涂层既不熔融,也不与金属基体发生任何反应,而且工艺简便。除用作一般零件保护外,特别适用于优质合金钢的大尺寸件、螺纹件、焊接件的保
Metal heated in hot air, due to oxygen caused by the metal surface oxidation, decarbonization. The metal fatigue, strength, impact, wear and other performance decline, affecting the service life of parts. Although this defect can be used salt bath, vacuum, controlled heating to overcome, but because of expensive investment, complex operation, control difficulties, but can not be widely used. As a result, our factory and Xi’an Oil Knee Plant jointly developed a No. 3 heat treatment protective coatings for metal heat treatment without oxidation protection. The production practice confirmed that the metal surface after heat treatment can reach no oxidation, less decarburization or decarburization. During heat treatment, the coating neither melts nor reacts with the metal matrix, and the process is simple. In addition to the general part of the protection, especially for high-quality alloy steel large-size pieces, screws, welding parts of Paul