The method of reducing oxidation and decarburising the surface by heating billets from tool steels

摘要

the advantage of the method of tool steel for hot processing to a smaller scale and less heating is also razogljiu010denje surface. heating steel begins in oxidative atmospheres with retention in the area under the temperature of ac1, that is in orodnem steel w.nr. 1.3343 at 780 degrees celsius and at orodnem steel w.nr. 1.2379 at 815 degrees celsius.in the initial heating in oxidative atmosphere (with 10% o2), a low-temperature compact scale, which protects the surface of the steel in the following heating at a higher temperature (1 - 1.5% oxygen) for processing in a hot (rolling or forging).compared with the conventional procedure of heating billets, the proposed method allows for less loss of material due to heating and the surface oxides on the surface razogljiu010denja and thus provides a better surface quality with the tool jeklih.