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中、高碳钢的退火工作者长期以来意识到他们面临的问题是:用户并不总是根据最好的冶金科学,而是根据由于缺乏控制整个退火条件常常不可避免的出现一些互相矛盾的结果提要求。尽管我们常常力图要更好地了解在影响渗碳、脱碳和碳黑的化学反应中所发生的情况,但由于退火气氛的供应不能解决前面所提到的问题。例如:在理想情况下,当钢在退火过程中加热和冷却时,纯氮将阻止钢中的化学成份的改变。但实际上退火炉中通常会有一些氧存在,这种氧或者是泄漏空气的游离氧,或者是氧化物、水和二氧化碳的化合态氧。
Annealing workers in medium and high carbon steels have long realized that the problem they face is that users are not always based on the best metallurgical science but on the basis of conflicting results that are often inevitable due to lack of control of the overall annealing conditions Make a request Although we often seek to better understand what happens in the chemical reactions that affect carburization, decarburization and carbon black, the supply of annealing atmosphere does not solve the aforementioned problems. For example: Pure nitrogen, in the ideal case, will prevent the chemical composition of steel from changing as the steel is heated and cooled during annealing. In practice, however, there is usually some oxygen present in the annealing furnace, which is either free oxygen leaking from the air or a compound oxygen of oxides, water and carbon dioxide.