铝含量对Fe-Cr-B-Al合金组织性能影响的研究  

Effect of Aluminum Content on Solidification Microstructure and Properties of Fe-Cr-B-Al Alloy

作　　者：于震[1] 符寒光[1] 蒋业华[2] 周荣[2] 雷永平[1] 岑启宏[2] 郭红星 

机构地区：[1]北京工业大学,北京100022 [2]昆明理工大学,云南昆明650093 [3]云南昆钢重型装备制造集团有限公司,云南昆明650501

出　　处：《中国铸造装备与技术》2012年第4期40-44,共5页China Foundry Machinery & Technology

基　　金：北京市教委科研项目(PXM2012-014204-00-000136;PXM2012-014204-00-000156);云南省院省校科技合作专项(2010AD012);国家自然科学基金(51054008)的资助

摘　　要：实验结果表明,不含铝元素的Fe-Cr-B合金铸态组织主要有马氏体、残余奥氏体和不同类型硼碳化合物组成,硬度超过65HRC。铝加入量不超过1.0%时,合金硬度变化不明显,物相组成也未出现变化。加铝量达到1.5%时,基体中出现了铁素体,合金硬度急剧下降。随铝含量的增多,铁素体在基体中所占比例越来越高,硬度逐渐下降但变化不大。The results indicated that with hardness over 65 HRC the as-cast microstructure of the aluminium- free sample consisted of martensite, residual austenite and varieties of boron and carbon compound. With a small amount of aluminium element （Al ≤ 1.0%） added, the phase composition had no significant change nor the hardness of the alloy. While the concentration of aluminium reached 1.5%, ferrite appeared in the matrix of Fe-Cr-B-Al alloy with a sharply decrease of hardness. The proportion of ferrite in the matrix went up along with increasing aluminium concentration and the hardness of alloy decreased gradually though without sharply change.

关 键 词：Fe—Cr—B—Al合金 铝含量 凝固组织 铁素体 力学性能 

分 类 号：TG131[一般工业技术—材料科学与工程]