摘要
研究了加入钒铁和钒氮合金生产HRB500钢筋的对比试验以及对力学性能的影响与其V、N的强化机制。结果表明,采用钒氮合金生产的HRB500钢筋强度明显提高,细化晶粒的效果比钒铁的效果好,在钢中碳当量、钒含量基本一致的情况下,加入的氮促进V(C、N)化合物的析出,而大量细小弥散的V(C、N)析出物是钒氮合金钢强度增加的主要原因。为保证生钢筋的力学性能合格,在钢筋中增氮且钒含量控制在0.05%~0.06%可使钢筋强度更高、性能更加稳定。因此,采用钒氮合金生产HRB500钢筋可减少钒的加入量,其生产成本大幅度降低。
The comparison experiment, the effects of adding V-N alloy and V-Fe alloy on mechanical properties and their strengthening mechanism of HRB500 reinforced bar were studied. The results show that the intensity of the HRB500 reinforced bar produced by V-N alloy improves obviously. The refining effect of V-N alloy is better than V-Fe alloy. The addition of nitrogen in the steel can promote the refining V (C,N) precipitation under the condition that the carbon equivalence is the same as the V content in the steel. And a great deal dispersed V (C,N) is the main cause of the increase of the intensity of V-N alloy reinforcing bars. In order to insure the qualified mechanical properties, the V content should be controlled from 0.05% to 0.06% and the addition of nitrogen in the steel can obtain the finer structure with higher strength and stable property. Therefore, the V-N alloy can save amounts of vanadium and the cost is much less than the former HRB500 reinforcing bar with V-Fe.
出处
《热加工工艺》
CSCD
北大核心
2007年第18期35-37,共3页
Hot Working Technology