高性能碳素钢轨热轧及轧后在线冷却工艺研究  

RESEARCH ON HOT ROLLING AND ON-LINECOOLING TECHNOLOGY FOR HIGH-DUTYCARBON STEEL RAILS

作　　者：孙本荣[1] 曾秀珍[1] 朱晔[1] 赵林春[1] 张天绪[2] 徐烈平 赤荣 翁绳厚 张慧生[2] 张国柱[2] 

机构地区：[1]钢铁研究总院 [2]包头钢铁公司

出　　处：《钢铁》1989年第9期33-37,75,共6页Iron and Steel

摘　　要：本文利用Formastor-Press模拟试验机和φ300 mm二辊热轧试验轧机研究了采用接近共析成分的碳素钢生产高性能60 km/m钢轨的新的热轧及轧后在线冷却工艺,其工艺为:钢坯加热温度1150℃,终轧温度为900～850℃,轧后冷却速度为5～10℃/s。获得了珠光体团直径为5～6 μm,珠光体片层间距为900 A的超细珠光体组织。钢轨模拟试样性能达到:σ_b=1135 MPa,σ_(0.2)=808MPa,δ_5=12～15.4％,接近或达到了热处理钢轨的性能水平。A new hot rolling and on-line cooling technology has been worked out on Formastor-PressSimulator and a φ 300 mm 2-high hot rolling mill. The technology is suitable for producing high-duty carbon rails of 60 kg/M which have a composition close to eutectoid. The key temperaturesin the new technology are as follows heating temperature 1150℃; finishing temperature: 900～850℃; cooling rate: 5～10%/sec. With such a technology, supper fine pearlite microstructure hasbeen obtained with a pearlite colony size of 5～6 μm and a interlaminar spacing of 900A. Suchmicrostructure results in good properties of 1135 MPa tensile strengyh, 808 MPa yield point and12～15.4 percent elongation which are close to or equal to that of heat-treated rails.

关 键 词：钢轨 碳素钢 热轧 在线冷却 

分 类 号：TG335.43[金属学及工艺—金属压力加工]