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锻造毛坯在加热过程中,如不采取必要的措施炉膛气氛将对加热金属表面造成氧化、脱碳、污染或合金元素的烧损,给锻件的组织性能和表面质量带来严重的影响,并加快了模具的不均匀磨损,降低锻件的尺寸精度。炉膛气氛对加热金属表面的影响,对于不同的合金,往往表现出不同的形式: (1) 钢锻件毛坯加热,主要表现为氧化和脱碳。钢中的铁元素,在高温下与炉膛中的O_2、CO_2、SO_2作用,由表向里形成Fe_2O_3、Fe_3O_4、FeO三种铁的氧化物,并以氧化皮
Forging blank in the heating process, if not take the necessary measures Furnace atmosphere will heat the metal surface oxidation, decarburization, or alloying elements of the burning, the forgings of the organizational performance and surface quality has a serious impact and speed up Uneven mold wear, reduce the dimensional accuracy of forgings. Furnace atmosphere on the heating of the metal surface, for different alloys, often show different forms: (1) steel forgings heating, mainly for oxidation and decarbonization. Iron in the steel, at high temperature with the furnace O_2, CO_2, SO_2 role from the table to the formation of Fe_2O_3, Fe_3O_4, FeO three kinds of iron oxide, and the oxide scale