摘要
将铬合金丝与灰铸铁进行铸造复合及热处理,采用原位法制备出碳化物颗粒增强铁基复合材料。利用XRD、SEM和EDAX对该复合材料的微观组织进行观察。结果表明:在1160℃下保温20、22 min后,该复合材料中生成M7C3型碳化物,靠近合金丝边缘的为细小颗粒状,远离合金丝为板条状,同时在复合材料中出现珠光体;保温24 min后,合金丝与基体完全反应,生成的碳化物与保温26 min时一致,全部为M3C型。
Abstract：The in-situ production carbide particle reinforced iron matrix composite was prepared by using casting and heat treatment for chromium alloy wire and grey cast iron. The microstructure of generation phase was observed by X-ray diffraction （XRD）, scanning electron microscopy （SEM） and energy dispersive X-ray analysis （EDAX）. The results show that M7C3 type carbides generate in the composite at 1160℃ for 20 rain and 22 min, and the shape changes from fine particle near alloy wire edge into lath away from the alloy wire. Simultaneously, the pearlite appears in the composite. After heat treatment for 24 min, the alloy wire all reacts with the substrate and disappears in the composite. At the same time, the generating carbides become MaC type, which is in agreement with heating treatment for 26 min.
出处
《热加工工艺》
CSCD
北大核心
2013年第4期97-99,102,共4页
Hot Working Technology
基金
国家自然学基金资助项目(2008KR0762)
关键词
铬合金丝
灰铸铁
原位生成
chromium alloy wire
grey cast iron
in-situ production
