基于超快冷技术开发低合金高强度耐磨钢（英文）

Development of low-alloy and high strength wear resistant steel based on ultra-fast cooling technology

采用超快冷却技术(UFC)开发了含Nb、Ti、Cr、B的低合金高强度耐磨钢。研究了起始冷却温度和终冷温度对其显微组织和力学性能的影响。结果表明:终轧后采用较高的终轧温度进入超快速冷却时可细化试验钢的原始奥氏体晶粒,防止沉淀粗化;通过控制适当的终冷温度,可获得具有马氏体、贝氏体和残留奥氏体的高强度耐磨钢;在冷却温度为910℃,终冷温度为300℃的条件下,试验钢可获得良好的力学性能。

A low alloy and high strength wear-resistant steel containing Nb,Ti,Cr and B was developed by using ultra-fast cooling technology(UFC).The effects of starting cooling temperature and finishing cooling temperature on microstructure and mechanical properties of the steel were studied.The results show that the primary austenite grain of the tested steel can be refined and the precipitation coarsening can be prevented when the finishing rolling temperature is applied to ultra-fast cooling after finishing rolling.The high strength wear resistant steel with martensite,bainite and retained austenite can be obtained by controlling proper finishing cooling temperature,and good mechanical properties can be obtained under the conditions of starting cooling temperature of 910℃and finishing cooling temperature of 300℃.