摘要
为了探索合金无缝管的热处理工艺,采用光学显微镜(OM)、扫描电镜(SEM)、室温拉伸试验等方法,研究了热处理工艺对N06230高温合金冷轧无缝管的组织和抗拉强度的影响。通过OM、SEM表征方法,分析了温度为1 200~1 300℃、保温0.5~5.0h时M6C型碳化物面积百分比及晶粒尺寸变化规律,并建立了晶粒尺寸长大动力学模型。结果表明,该合金中有很多富钨的M6C型碳化物,横向呈现颗粒状弥散分布,沿轧制方向呈链状分布,部分M6C型碳化物呈椭圆状特征,面积百分比约为1.97%。随着热处理温度的升高及保温时间的延长,无缝管的抗拉强度逐渐降低。
In order to provide reference for heat treatment of alloy seamless tubes,the effects of heat treatment process on the micostructure and tensile strength of cold-rolled N06230 alloy seamless tubes was studied by means of optical microscopy(OM),scanning electron microscopy(SEM)and tensile test at room temperature.By OM and SEM characterization,the area percentage of M6 C carbides and grain size in the range of 1 200-1 300℃and holding for 0.5-5.0 hwere analyzed,and the kinetic model of grain size growth was established.The results show that there are a lot of W-rich M6 C carbides in the alloy,which have the characteristics of granular and dispersive distribution in the transverse direction,distributed in the chain along the rolling direction.Some M6 C carbides show elliptical characteristics,and the area percentage is about 1.97%.The tensile strength of seamless tube decreases with the increase of heat treatment temperature and the prolongation of holding time.
作者
高佩
程晓农
罗锐
GAO Pei;CHENG Xiao-nong;LUO Ruil(School of Materials Science and Engineering,Jiangsu University.Zhenjiang 212013,Jiangsu,China;Technical Management Department,Jiangsu Yinbuan Precision Steel Tube Co.,Ltd.,Yixing 214203,Jiangsu,China)
出处
《钢铁》
CAS
CSCD
北大核心
2019年第12期89-95,共7页
Iron and Steel
基金
江苏省重点研发计划(产业前瞻与共性关键技术)资助项目(BE2017127)
