摘要
首先主要阐述了富Al铁素体—奥氏体双相轻质钢和奥氏体轻质钢的微观组织特征、力学性能和强韧化机制。尽管添加Al可以降低钢的密度和提高比强度,但是它会使钢的弹性模量显著降低。针对这一不利属性,介绍了一种切实可行的提高轻质钢(以及碳钢)弹性模量的措施,即利用凝固过程中原位自生高弹性模量的硬质颗粒(如Ti C和Ti B2等)来增强钢的基体。所形成的颗粒增强钢基复合材料可以具有较常规碳钢和富Al轻质钢更高的弹性模量和比弹性模量。
A detailed review of microstructural characteristics, mechanical property, and strengthening mechanisms of Al-rich ferrite-austenite dual-phase lightweight steels and austenitic lightweight steels were given. Although A1 addition leads to a decrease of density and an increase in specific strength, it results in a remarkable drop of elastic modulus of a steel. In view of this unfavorable attribute, a feasible measure for improving elastic modulus of a lightweight steel（ and also carbon steel） was introduced, i. e. , employing hard particles such as TiC and ZiB2 which possess higher elastic modulus and in-situ form during solidification to reinforce the steel matrix. Compared to conventional carbon steels and Al-rich lightweight steels, the particle-reinforced steel matrix composites thereby developed can have much higher elastic moduli as well as specific elastic modulus.
出处
《宝钢技术》
CAS
2015年第4期1-8,共8页
Baosteel Technology
关键词
铁素体--奥氏体双相轻质钢
奥氏体轻质钢
高弹性模量钢
ferrite-austenite dual-phase lightweight steels
austenitic elastic modulus steels lightweight steels
high
