Fe-Cr26-Ni13系中碳耐热铸钢的制备和组织性能分析  

Analysis on Microstructure and Mechanical Properties of Fe-Cr26-Ni13 Medium Carbon Heat Resistanting Casting Steel

作　　者：武昭[1] 王鹏程[1] 李进福[1] 赵锦龙[1] 

机构地区：[1]内蒙古工业大学材料科学与工程学院,内蒙古呼和浩特010051

出　　处：《热加工工艺》2015年第18期45-47,51,共4页Hot Working Technology

基　　金：内蒙古工业大学科研基金项目(ZD201007)

摘　　要：基于研制使用温度高达1200℃耐热铸钢的目的,通过化学成分设计,使用中频感应炉冶炼,研制了一种铁铬镍稀土耐热铸钢以及在其基础上分别加铝2wt%、4wt%、6wt%的三种耐热铸钢。通过金相显微镜、X射线衍射和扫描电子显微表征以及Gleeble热模拟机,研究了这4种耐热铸钢的显微组织、结构和高温力学性能。结果表明:铁铬镍稀土耐热铸钢的组织为奥氏体+碳化物,含铝耐热铸钢的组织为铁素体+碳化物+金属间化合物;在含铝耐热铸钢中,含6wt%的耐热铸钢的高温屈服强度和高温强度最高。Based on the purpose of developing a heat-resistant casting steel which its service temperature of 1200 ℃,by chemical composition designing,RE Medium Carbon Fe-Cr26-Ni13 heat-resistant casting steel and on this basis,three kinds of heat-resistant casting steel,such as 2wt Al%,4wt Al%,6wt Al%,were added separately,which were melt and cast in medium fequency induction furnace. The effects of Al addition on the microstructure and high temperature yield strength,high temperature compressive strength were researched by using metalloscope,X-ray diffraction,scan electron microscope and Gleeble thermal simulation machine. The results show that the microstructure of RE heat-resistant Fe-Cr26-Ni13 steel is austenite and carbides. The microstructure of Al heat resistant cast steel is ferrite＋carbide＋intermetallic compounds. High temperature yield strength and high temperature compressive strength of the heat resistant cast steel containing 6wt%Al are highest.

关 键 词：耐热铸钢 金属间化合物 组织 高温抗压强度 铝 

分 类 号：TG142.1[一般工业技术—材料科学与工程]