氧化物冶金之探析

对利用微细氧化物钉扎奥氏体晶界和诱导晶内针状铁素体进行了理论分析，认为氧化物主要是钢液的脱氧产物，具有尺寸大、体积分数小的特征，既不能有效钉扎奥氏体晶界，也难以促进针状铁素体在奥氏体晶粒内形成。微细的氮化物可以在钢中大量析出，符合有效钉扎奥氏体晶界和诱导针状铁素体的要求。

Analysis and discussion on oxides metallurgy

Pinning austenite grain boundaries and inducing acicular ferrites(IAFs) by means of fine oxides are theoretically analyzed. The oxides mainly form in deoxidizing process of liquid steel with big size and small volume fraction, therefore they cannot effectively pin the austenite grain boundaries, also are hard to induce IAF in austenite grains. A large amount of nitrides can precipitate in steel, in line with both requests of effective pinning grain boundaries and inducing IAFs.