摘要
采用合金化方法生产的高强度高韧性贝氏体钢轨及道岔,其热轧态抗拉强度大于1 250 MPa,比U75V提高25%;轨腰冲击韧性大于30 J/cm2,比U75V提高3倍以上。介绍了热轧贝氏体钢轨的强化机理、生产工艺及各项检验结果。用贝氏体钢制作的铁路道岔在线路运行已一年半以上,货运量达2亿t,目前仍在使用。在北京铁路局铺设的全贝氏体组合道岔,其使用寿命进一步提高,高强度高韧性贝氏体钢在铁路使用将得到较大的社会和经济效益。
Bainite alloy steel rail and fork-rail with high strength and high toughness of which tensile strength in hotrolled condition can reach up to 1 250 MPa,25% higher than that of U75V,and impact toughness of rail waist is above 30 J/cm^2 ,3 times higher than that of U75V. The production and inspection methods of hot-rolled bainite steel rail are introduced. The bainite steel forth rails have been used over 1.5 years,with a volume of rail freight about 200 million tons. Life of bainite steel fork-rail in Beijing railways is increasing furthermore. By using bainite steel rails with high strength and high toughness, considerable social benefits and economic benefits can be obtained.
出处
《钢铁》
CAS
CSCD
北大核心
2007年第2期68-71,共4页
Iron and Steel
关键词
高强度
高韧性
贝氏体钢轨
high strength
high toughness
bainite steel rail
