水玻璃砂型铸造Fe_3Al金属间化合物的组织和力学性能  

Microstructure and Properties of Fe_3Al Intermetallic Compounds Prepared by Water Glass Sand Casting

作　　者：李亚敏[1] 刘洪军[1] 谢斌[2] 郝远[1] 

机构地区：[1]兰州理工大学有色金属合金及加工教育部重点实验室,甘肃兰州730050 [2]兰州理工大学材料科学与工程学院,甘肃兰州730050

出　　处：《热加工工艺》2010年第1期1-3,共3页Hot Working Technology

基　　金：甘肃省自然科学基金项目(3ZS042-B25-028);兰州理工大学有色金属合金及加工教育部重点实验室开放基金(EKL07009)

摘　　要：研究了中频感应炉熔炼、水玻璃砂型冷却制备的Fe3A1金属间化合物合金铸态及热处理后的组织、力学性能和冲击断裂行为。结果表明:热处理后合金的抗拉强度σb提高了49MPa,硬度由铸态时的21.6HRC提高到了25HRC,但合金的冲击韧度出现了较明显的下降;铸态时合金的断裂主要呈沿晶断裂特征,热处理后合金断口呈沿晶+穿晶的混合型断裂特征。The Fe3Al alloy were melted in intermediate frequency induction furnace and solidified in water glass sand. The microstructure, mechanical properties and impact fracture characteristic of Fe3Al alloy were studied. The results show that after heat treatment, the tensile strength of the alloy increases by 49 MPa, the hardness increases from 21.6 HRC to 25 HRC, and the impact fracture toughness decreases; fracture characteristic is intercrystalline fracture in as-cast, it is intercrystalline and transcrystalline mixed fracture after heat treatment.

关 键 词：FE3AL 组织 力学性能 冲击断口 

分 类 号：TG146.21[一般工业技术—材料科学与工程] TG242[金属学及工艺—金属材料]