Nb-和V-微合金化对高碳钢热加工性的影响  

Effect of Nb- and V- Microalloying on Hot Workability of High Carbon Steel

作　　者：刘平[1] 李峰[1] 陈爱梅[1] 史凤武[1] 

机构地区：[1]包钢(集团)公司技术中心,包头014010

出　　处：《特殊钢》2008年第6期13-14,共2页Special Steel

摘　　要：用Gleeble 1500D热模拟机试验了0.03%Nb、0.03%Nb-0.02%V和0.05%V微合金化0.75%～0.78%C高碳钢280 mm×380 mm铸坯上钻取的Φ10 mm×120 mm试样在1 300～800℃的断面收缩率和抗拉强度。结果表明,第1脆性区≥1 200℃和第3脆性区1 000～800℃V-钢的热塑性优于Nb-V钢和Nb钢。扫描电镜和能谱分析表明,Nb-钢铸坯存在Fe-Nb-C共晶体,加入V的Nb-V钢铸坯存在Fe-Nb共晶体。The reduction of area and tensile strength of φ10 mm × 120 mm specimen drilled and turned from 280 mm × 380 mm east billet of 0. 03Nb, 0.03Nb-0.02V and 0. 05V Microalloyed 0. 75 -0. 78C high carbon steel have been tested at 1 300 - 800 ℃ by Gleeble 1500D thermal simulation machine. Results showed that the hot plasticity of V-steel in first brittle zone ≥ 1 200 ℃ and third brittle zone 1 000 800 ℃was better than that of Nb-steel and Nb-V steel. It was indicated by scanning electron microscopy and energy spectrum analysis that Fe-Nb-C etltectie existed in cast billet of Nb- steel, and Fe-Nb euteetie existed in east billet of Nb-V steel added V.

关 键 词：Nb-V-微合金化 高碳钢 热加工性 钢铸坯 

分 类 号：TG142.31[一般工业技术—材料科学与工程] TG142.71[金属学及工艺—金属材料]