氮化合金增氮分析

Analysis of Nitrogen Increasing for Nitridized Alloys

氮对微合金化钢中的碳氮化物的析出起重要作用。使用不同的含氮合金和不同加入量,钢水氮含量波动大,氮收得率不稳定,对稳定HRB400E、HRB500E性能有一定的影响。研究影响含氮合金氮收得率因素,不同类型含氮合金氮的收得率分析。研究得出钒和氮的配比为3. 65∶1时,VN析出量最大,HRB400E钢水中氮含量在85×10-6为最佳,继续提高钢中氮含量,钢筋的屈服强度升高不明显。HRB400E钢水中氮达到100×10-6左右,再增加含氮合金加入量,钢水氮含量增加幅度不大,氮的收得率会出现下降的趋势。规范合金加入方法,可有效提高含氮合金氮的收得率。

Nitrogen play-s an important role in lhe precipitation of carbon and nitride in micro - alloyed steel. Using differ- ent amounts of nitrogen - contain alloys would make the nitrogen content of molten steel fluctuate greatly and the yield of ni- trogen unstable, which has a certain effect on the stability- of steels HRB400E and HRB500E. The factors affecting the ni- trogen yield of nitrogen containing alloys were studied and the nitrogen recovery- rates of different nitrogen containing alloys were analyzed. When the ratio of vanadimn and nitrogen is 3.65： 1, the maxinmnl amount of VN precipitation is obtained, and the nitrogen content in molten steel HRBd00E is around 85 ×10 6. The yield strength of steel is not obviously in- creased, and the nitrogen in molten steel HRB400E is about 100 ×10 6. With the addition of nitrogen alloy, the increase of nitrogen content in molten steel is small, and the yield of nitrogen will decrease. The nitrogen recovery- rate of the alloy containing nitrogen can be effectively increased by standardizing the adding method of the alloy.