成分及工艺对车轴钢组织性能的影响

来源期刊：钢铁钒钛2010年第2期

论文作者：杨雄飞

文章页码：67 - 71

关键词：车轴钢； 钒； 成分； 工艺； 组织

Key words：axle steel； vanadium； compersition； process； microstructure

摘    要：通过对比试验及热力学模拟试验,研究了化学成分、变形温度及冷却速率对新型合金车轴钢的力学性能、显微组织影响,开发出化学成分0.40%C-0.08%V-0.019%Ti的钢种,具有最佳的综合拉伸性能。该钢种对试验确定的两种不同变形工艺不敏感,但冷却速率对组织影响明显,由冷却速率不同造成的组织不均匀性,需要借助后续热处理工艺消除。

Abstract: The effects of chemical compositions,deformation temperatures and cooling rates on mechanical properties and microstructures of axle steel for railroad vehicle was investigated through comparison tests and thermo-mechanical simulation tests.Then,based on the front experiment,a new steel with 0.40%C-0.08%V-0.019%Ti was developed successfully.The new steel displays excellent tensile properties and invisible sensitivity to two different deformation temperatures applied.However,the cooling rates have great influence on microstructures of steel,which implies proper heat treatment is necessary for eliminating mixed grains inevitably occurred in practical product of steel axle.