摘要
针对高性能轧辊对材质的需求,设计了一种1.0%<ω(B)<3.0%和ω(C)约为0.45%的高硼中碳合金钢,并研究了硼含量对其铸态组织与力学性能的影响。结果表明:高硼中碳合金钢铸态组织由马氏体、少量残留奥氏体及共晶硼碳化合物或硼化物组成。随着B含量的增加,其组织由亚共晶形态向过共晶形态转变,共晶硬质相体积分数呈指数关系变化,材料硬度不断升高,冲击韧性下降。
High-boron middle-carbon alloy steels, containing 1.0%-3.0% B and 0.45% C, were designed considering the requirment of high-property roller. The effect of boron content on microstrueture and mechanical properties of the as-cast high-boron middle-carbon alloy steels was researched. The results show that the as-cast microstructure of the high-boron middle-carbon alloy steels consists of lath martensite, a small amount of retained austenite and euteetic boroearbides or borides. Increasing boron content changes the hypoeutectic structure to hypereutcctie structure, and improves hardness with decreasing its toughness, and the volume fractions of eutectic hard phase change exponentially for the high-boron middle-carbon alloy steels.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2013年第6期34-37,共4页
Transactions of Materials and Heat Treatment
基金
国家自然科学基金项目(51171073)
云铜校企预研基金(KKS0201051013)
关键词
轧辊
合金钢
硼碳化合物
硬度
冲击韧性
roller
alloy steel
borocarbide
hardness
impact toughness
