PD_275kg/m全长热处理钢轨研制  

DEVELOPMENT OF PD275kg/m FULL-LENGTH HEAT TREATED STEEL RAIL

作　　者：邓建辉[1] 雷秀华[1] 张昆吾 

机构地区：[1]攀枝花钢铁研究院 [2]攀钢轨梁厂

出　　处：《钢铁钒钛》1998年第3期26-29,40,共5页Iron Steel Vanadium Titanium

摘　　要：以高碳低锰碳素热轧钢轨为热处理原料轨，采用双频电感应加热、压缩空气欠速淬火热处理技术研制的PD275kg／m热处理钢轨，硬化层深度≥15mm、组织为细珠光体；力学性能：σ0.2815～980MPa、σb1185～1340MPa、δ510％～15％，常温冲击韧性aK14～33J／cm2，断裂韧性KIc平均值45.5MPa·m1/2。具有强度高，塑韧性好的综合性能。使用性能优良，寿命比同曲线的U71Mn热轧轨延长一倍以上。The high carbon low manganese hot rolled steel rail is subject to heat treatment,using double frequency induction heating and slack quenching with compressed air. The PD275kg/m heat treated rail was developed which is characterized by fine pearlitic structure;a depth of hardened layer≥ 15mm and mechanical property:σ0.22815～980MPa, σb1185～1340MPa, δ510%～15%, room temperature impact toughness aK 14～33J/cm2, average fracture toughness KIc 45. 5MPa·m1/2. The newly developed rail has a fair combined property of high strength,good ductility and toughness,and excellent service performance with its service life over twice that of the U71Mn hot rolled rail.

关 键 词：重型钢轨 热处理 全长热处理 钢轨 

分 类 号：TG162.82[金属学及工艺—热处理]