铌铁与铌氮的复合强化机理及对钢材强度的影响  

COMPOUND STRENGTHENING MECHANISM AND EFFECT OF NB-FE AND NB-N-FE ON STRENGTH OF STEEL

作　　者：胡友红[1] 张毅[1] 刘立德[1] 谢祥[1] 高长益[1] 盛光敏[2] Hu Youhong Zhang Yi Liu Lide Xie Xiang Gao Changyi Sheng Guangmin(Shuicheng Iron and Steel Group Corp Liupanshui 553028, China College of Materials Science and Engineering, Chongqing University Chongqing 400044, China)

机构地区：[1]水城钢铁集团公司,六盘水553028 [2]重庆大学材料科学与工程学院,重庆400044

出　　处：《冶金信息导刊》2017年第4期21-27,共7页Metallurgical Information Review

摘　　要：以HRB500试验钢为研究对象，分析了铌铁与铌氮的复合强化机理及对钢材强度的影响，弄清了不同微合金化方法的固溶析出行为和强化效果。其主要结果如下：a．对于铌铁微合金化，随着温度的降低，Nb在钢中几乎完全析出，当C=0．26％时，Nb由0．025％增加至O．20％时，析出强化增量由34MPa升至102MPa；b．对于铌氮微合金化，当C=0．26％时，Nb含量从0．025％增加至O．20％时，析出强化增量由46．1MPa增大至135．2MPa。Using HRBS00 experimental steel as study object, we analyzed compound strengthening mechanism and effect of Nb-Fe and Nb-N-Fe on strength of Steel and made clear solid solution and precipitation behavior and strengthening effect for different microalloying methods. The main results are as follows： （1） for Nb-Fe microalloying, Nb almost precipitates completely with temperature decrease, when C=0.26%, as Nb increases from 0.025% to 0.20%, incremental strength from precipitation increases from 34 MPa to 102 MPa; （2） for Nb-N-Fe microalloying, when C=0.26%, as Nb increases from 0.025% to 0.20%, the incremental strength from precipitation increases from 46.1 MPa to 135.2 MPa.

关 键 词：HKB500 高强度钢筋 NB 微合金化 强化 

分 类 号：TG142.15[一般工业技术—材料科学与工程]