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.
出处
《中国铸造装备与技术》
CAS
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