钢中钛与铌的行为差异性研究
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摘要
为了获得综合机械性能,高强度钢通常是钢中添加元素Ti和Nb的低合金钢。钢中添加微合金化元素Ti和Nb的目的是形成碳化物、氮化物和碳氮化合物从而细化钢中的晶粒进而提高钢的综合机械性能。但是,通过采用具有夹杂物分析功能的扫描电镜的研究发现,钢中添加元素Ti后,在钢中形成大量含Ti的硫化物,而Nb没有发现为硫化物。在非Ti的硫化物中大量存在Ti,而存在Nb的量比较少。结果使得钢中Ti的有效成分变化大,而Nb的有效成分变化小,即高强度钢中添加Nb的效果优于Ti,产品性能更加稳定。
In order to obtain comprehensive mechanical properties,high strength steels are usually low alloy steels with elements Ti and Nb added into the steel.The alloying elements Ti and Nb are added to form carbides,nitrides and carbon nitride compounds to refine the grain in steel and improve the comprehensive mechanical properties of the steel.However,by using SEM analysis with inclusion analysis function,it is found that a large amount of sulfide containing Ti is formed in the steel after adding element Ti,but Nb is not found as sulfide.A large amount of Ti exists in non Ti sulfides,but the amount of Nb is relatively less.As a result,the effective composition of Ti in steel varies greatly,while the effective component of Nb varies little.That is to say,the effect of adding Nb in high strength steel is better than that of Ti,and the performance of the product is more stable.
In order to obtain comprehensive mechanical properties,high strength steels are usually low alloy steels with elements Ti and Nb added into the steel.The alloying elements Ti and Nb are added to form carbides,nitrides and carbon nitride compounds to refine the grain in steel and improve the comprehensive mechanical properties of the steel.However,by using SEM analysis with inclusion analysis function,it is found that a large amount of sulfide containing Ti is formed in the steel after adding element Ti,but Nb is not found as sulfide.A large amount of Ti exists in non Ti sulfides,but the amount of Nb is relatively less.As a result,the effective composition of Ti in steel varies greatly,while the effective component of Nb varies little.That is to say,the effect of adding Nb in high strength steel is better than that of Ti,and the performance of the product is more stable.
引文
1刘淑媛.30CrMoTi钢中钛对硫化物形态的影响.钢铁钒钛,1981(2):34-37.
2 亓海全,雍岐龙,雍兮,等.低碳奥氏体钢中Ti夹杂溶解度的分析.特殊钢,2010(4):8-9.
3 赵子苏,毛卫民,余永宁,等.钛对高强IF钢第二相粒子析出规律和力学性能的影响.钢铁,2000(9):47-51.
2 亓海全,雍岐龙,雍兮,等.低碳奥氏体钢中Ti夹杂溶解度的分析.特殊钢,2010(4):8-9.
3 赵子苏,毛卫民,余永宁,等.钛对高强IF钢第二相粒子析出规律和力学性能的影响.钢铁,2000(9):47-51.