铝对抗磨耐热铸钢组织和性能的影响  

Effects of Aluminum on Microstructure and Hardness of Heat and Abrasion Resistant Steel

作　　者：张炎[1] 孙玉福[1] 关绍康[1] 闫兴义[1] 

机构地区：[1]郑州大学材料科学与工程学院,河南郑州450002

出　　处：《铸造》2008年第3期274-276,共3页Foundry

摘　　要：通过金相组织观察、X射线衍射相结构分析以及力学性能测试,研究了铝对铸态抗磨耐热铸钢(ZG40Cr25Ni20)显微组织、结构和硬度的影响。结果表明,加入铝量达到5%时,铸态组织中出现了大量的颗粒状金属间化合物(γ'相),使晶界碳化物呈较为分散的分布;γ'相的出现显著提高了材料的硬度,5%铝添加量试样的硬度比ZG40Cr25Ni20的硬度提高33.8%。The effects of AI addition on microstructure and hardness of heat and abrasion resistant steel were studied using metalloscope, x-ray diffraction, scan electron microscope and hardness tester. The results showed that many granular intermetallic compound Ni3AI （γ＇ phase） were formed when the addition content of AI is up to 5% in the steel. The formation of γ＇ phase makes the carbide within matrix distribute dispersedly and the hardness improved greatly. Hardness of the steel with 5% Al addition is increased by 33.8% compared with that of ZG40Cr25Ni20.

关 键 词：铝 金属间化合物 组织 硬度 

分 类 号：TG142.13[一般工业技术—材料科学与工程]