摘要
文章针对高寒地区铁路运营环境和钢轨服役性能需求,通过材料成分设计和热处理工艺研究,在实验室开发出性能优异的新型耐磨耐低温珠光体钢轨。试验结果表明:在化学成分为0.66%C-0.45%Si-1.10%Mn基础上,加入0.10%Ni元素对试验钢-40℃冲击功改善不明显,但冲击性能比不加Ni稳定。试验钢开始热处理温度提高至780℃后,可阻止异常组织马氏体产生,组织为珠光体加少量铁素体,-40℃冲击功可达20.1 J。
In the paper,it is introduced a new type of wear resistant and low temperature resistant pearlitic rail with excellent performances is developed through designing material compositions and studying heat treatment process aiming at the operating environment of railway in alpine regions and performance requirements for service of rail.The test results showed that the improvement of impact energy of test steel at-40℃was not obvious by adding 0.10%Ni on the basis of the chemical composition of 0.66%C-0.45%Si-1.10%Mn,but impact performance was more stable than that of test steel without Ni.After the heat treatment of test steel is started and temperature is increased to 780℃,the abnormal microstructure,martensite could be prevented to be generated as well as microstructure is pearlite and a small amount of ferrite and impact energy at-40℃could reach 20.1 J.
作者
薛虎东
边影
彭泽清
Xue Hu-dong;Bian Ying;Peng Ze-qing(School of Mechanical Engineering,Southwest Jiaotong University,Chengdu 610031,Sichuan,China;Technical Center of Inner Mongolia Baotou Steel Union Co.,Ltd.,Baotou 014010,Inner Mongolia Autonomous Region,China;Enterprise Key Laboratory of Rare Earth Steel Products Research&Development,Baotou 014010,Inner Mongolia Autonomous Region,China)
出处
《包钢科技》
2024年第1期60-64,共5页
Science & Technology of Baotou Steel
关键词
珠光体钢轨
材料学
高寒地区
耐低温
热处理
pearlitic rail
materials science
alpine regions
low temperature resistant
heat treatment