分段冷却对HRB400E相变过程及微观组织的影响  

Influence of cooling process on the phase transformation and microstructure of HRB400E

作　　者：陈伯瑜 廖琳琳 王明娣 孟祥[2] 李辉[2] 陈银莉[2] 

机构地区：[1]福建省三钢(集团)有限责任公司技术中心,福建三明365000 [2]北京科技大学冶金工程研究院,北京100083

出　　处：《钢铁》2015年第2期81-84,共4页Iron and Steel

摘　　要：HRB400E吐丝后的冷却过程决定了其微观组织组成。通过Gleeble-3500热模拟试验机模拟了HRB400E不同的冷却工艺,分析了不同冷却工艺条件下的膨胀量曲线和微观组织。试验结果表明:冷却速率和冷却速率突变温度对试验钢的最终组织组成有非常大的影响,2个参数的合理搭配,可以控制得到一定数量的贝氏体;贝氏体体积分数随突变温度的降低和冷却速率的提高呈现上升的趋势。The microstructure of HRB400 E was decided by the cooling process after laying. The different cooling processes were simulated by Gleeble- 3500 thermal simulation tester. The dilatometric curve and microstructure were analyzed under different cooling processes. The results indicate that the cooling rate and mutational temperature greatly influenced the final microstructure. The rational cooperation of these two parameters could dominate the fraction of bainite.With the increasing of cooling rate and decreasing of mutational temperature,the fraction of bainite enhanced.

关 键 词：微观组织 热模拟 贝氏体 

分 类 号：TG142.1[一般工业技术—材料科学与工程]