Fe-C-Si-Mn-V钢的显微组织及热变形行为研究  

Study on the Microstructure and Hot Deformation Behavior of a Fe-C-Si-Mn-V Steel

作　　者：刘成宝[1] 许宝玉[1] 朱京军[1] 易红亮[1] 

机构地区：[1]莱芜钢铁集团有限公司技术研发中心,山东莱芜271104

出　　处：《山东冶金》2013年第2期32-34,共3页Shandong Metallurgy

摘　　要：采用光学显微镜、扫描电镜观察Fe-C-Si-Mn-V钢的微观组织和拉伸断口,在Gleeble-1500热模拟机上进行单道次压缩试验,试验温度为900～1050℃,变形速率为0.1、1、10s-1。试验钢组织为铁素体+珠光及少量马氏体,屈服强度823MPa,抗拉强度1011MPa,伸长率8.5%,较为粗大或沿晶界分布的碳化物应是伸长率较低的原因。通过线性回归方法计算出了热变形激活能和其他常数,获得了峰值流变应力、应变速率和应变温度之间的关系式。The microstructure and tensile fracture were observed by optical microscopy and scanning electron microscopy, and the single pass compression test was performed by Gleeble-1500 thermal mechanical simulator at the temperatures in the range of 950 and 1 050 ℃ and at the strain rates of 0.1, 1 and 10 s^-1. The results showed that the microstructure of experimental steel is ferrite and pearlite with a small quantity of martensite, the yield strength is 823 MPa, the tensile strength is 1 011 MPa and the elongation is 8.5%. The intragranular coarse or carbides distributed along grain boundaries decrease the total elongation in tensile test. Based on the linear regression analysis, the activity energy and other parameters of the material were determined, and the relationship between the peak stress, strain rates and the deformation temperatures were obtained.

关 键 词：含钒钢 微合金化 微观组织 热变形 热模拟 峰值应力 

分 类 号：TG115.2[金属学及工艺—物理冶金]