N对V微合金钢连续冷却转变曲线及组织的影响  

Effect of N on the CCT diagrams and microstructure of V-bearing microalloyed steels

作　　者：宫彦龄 吴大勇[2] 关从英 范文斌[1] 肖福仁[2] 廖波[2] 

机构地区：[1]河北钢铁股份有限公司承德分公司钒钛工程技术研究中心,河北承德067002 [2]燕山大学材料科学与工程学院,河北秦皇岛066004

出　　处：《金属热处理》2013年第5期48-52,共5页Heat Treatment of Metals

基　　金：河北省重大技术创新项目(09215139Z)

摘　　要：采用Gleeble-3500热模拟试验机,测试了两种低碳含钒微合金钢未变形及变形奥氏体的连续冷却转变(CCT)曲线,分析了V、N含量对相变的组织和CCT曲线的影响。结果表明,在V钢中,增加N含量,有利于V碳氮化合物析出,加速铁素体相变,并细化室温组织。而且变形使这种促进作用更加明显。在V钢中增加N含量,可以适当降低V添加量,从而降低生产成本。The CCT diagrams of V-bearing microalloyed steels without and with deformation have been constructed by using the means of a Gleeble-3500 thermal mechanical simulator, and the effects of V and N content on mierostructure and CCT diagrams were analyzed. The results show that increasing N content in V-bearing microalloyed steels can accelerate the precipitation of V carbonitride, ferrite transformation, and refines the microstructure under room temperature. Furthermore, these effects are more obvious under deformed austenite eondition. Therefore, increasing N content can decrease the V content appropriately, which can save production eost.

关 键 词：V微合金钢 CCT曲线 氮(N) 析出 

分 类 号：TG142.1[一般工业技术—材料科学与工程]