摘要
采用双频电感应加热、压缩空气欠速淬火技术研制的 PD375 kg/ m含钒微合金热处理钢轨 ,钢轨成分 (% ) :C0 .74～ 0 .81,Si0 .6 0～ 0 .90 ,Mn0 .70～ 1.0 5 ,V0 .0 5～ 0 .12。热处理钢轨硬化层深度≥ 15 mm,HRC≥ 36 .0 ,硬化层组织为全细珠光体 ,σ0 .2 =890～ 10 10 MPa,σb=12 90～ 1390 MPa,δ5 =10 %～ 13% ,常温aku=2 0～ 32 J/ cm2 ,KIC平均值为 46 .3MPa· m1 /2 。该钢轨强度高、韧性好。使用寿命比同线路的 U
The heat treatment technology of vanadium micro alloyed rail with specific weight of 75 kg/m was researched, and the PD3 heat treated rail has been developed The chemical composition of the rail:0 74 % 0 81 %C, 0 60 % 0 90 %Si,0 70 % 1 05 %Mn,0 05 % 0 12 %V The depth and hardness of hardening layer of heat treated rails are more than 15 mm and 36 HRC respectively The microstructure of hardening layer is full pearlite, yield strength is from 890 to 1010 MPa,ultimate tensile strength is from 1290 to 1390 MPa, elogation is from 10 % to 13 %, impact toughness of U notch at room temperature is from 20 to 32 J/cm 2, average plain strain crack toughness is 46 3 MPa·m 1/2 Service test indicates that the service life of PD3 heat treated rail is greatly longer than that of U74 and U71 Mn rails
出处
《钢铁》
CAS
CSCD
北大核心
2001年第3期45-48,共4页
Iron and Steel
关键词
合金钢轨
热处理
组织
性能
铁路运输
micro alloyed rail, heat treatment, structure property
