大轴重铁路货车车轴用LZ45CrV钢研究  

Research of LZ45CrV steel for the axle of heavy-duty railway freight car

作　　者：王玉玲[1] 王之香[1] 杨常春[1] 

机构地区：[1]山西太钢不锈钢股份有限公司,山西太原030003

出　　处：《机车车辆工艺》2014年第6期1-3,6,共4页Locomotive & Rolling Stock Technology

基　　金：国家科技支撑计划项目2012BAE04B00

摘　　要：研究了大轴重铁路货车车轴用LZ45CrV钢的高温力学性能、应力-应变、冷却速度对组织的影响以及静态力学性能.结果表明：LZ45CrV钢AC1为782℃、AC3为846℃;LZ45CrV钢在800℃ ～ 1200℃温度范围内无脆性区,热变形过程中仅发生加工硬化及动态回复,不发生动态再结晶,应变强化效应随着温度的降低无明显变化;冷却速度对LZ45CrV钢组织影响较大;LZ45CrV钢经860℃正火＋600℃回火处理后,钢的强韧性能匹配良好.The high temperature mechanical properties of LZ45CrV steel for the axle of heavy axleload railway freight ear are studied, together with its stress - strain, the influence of cooling speed on its mi- erostructure and its static mechanical properties. Testing results indicate that AC1 of LZ45CrV steel oc- curs at 782℃ , while AC3 happens at 846℃ ; there＇ s no brittle zone in the steel at the temperature ran- ging from 800℃ to 1200℃ , only work hardening and dynamic recovery occur during the thermal deforma- tion process without dynamic recrystallization, and the strain strengthening effect doesn＇ t change with temperature reduction ; the cooling speed generates large influence on the microstructure; after 860℃ nor- malizing and 600℃ tempering treatment, the toughness of LZ45CrV steel matches well.

关 键 词：车轴钢 LZ45CrV钢 铁路货车 大轴重 

分 类 号：U260.331.1[机械工程—车辆工程]