攀钢U71Mn重轨中的氢与缓冷效果  

HYDROGEN CONTENTIN U71Mn RAIL AND EFFECT OF SLOW COOLING

作　　者：冼爱平[1] 李培基[1] 陈文绣[1] 王仪康[1] 陈仁义[1] 梅东生[1] 

机构地区：[1]中国科学院金属研究所,攀枝花钢铁研究院,沈阳金属研究所

出　　处：《钢铁》1995年第5期37-41,共5页Iron and Steel

摘　　要：本文研究了攀钢重轨缓冷前钢轨中氢含量的统计分布及缓冷后钢轨中氢含量的变化。结果表明：攀钢重轨缓冷前氢含量就很低，最高２．４ｐｐｍ，最低仅０．６ｐｐｍ，平均值为１．３ｐｐｍ，最高统计分布频率在１．０～１．５ｐｐｍ间。这种低氢钢轨缓冷除氢的效果不显著，平均除氢率仅为１８％且上下波动较大。实物重轨锯后在室温下放量３至４个月后，轨头中的可扩散氢已基本逸散殆尽。根据上述结果，建议在采取适当的技术措施基础上取消现行的钢轨缓冷工艺制度。The statistical distribution of hydrogen content before slow-cooling in the rail produced by Panzhihua Iron&SteeI Co.,and the change of hydrogen content in the rail after slow- cooling was studied.The results has shown that before slow-cooling the hydrogen content in the rails was very low,since the maximum was 2.4 ppm,the minimum only 0.6 ppm and the even 1.3 ppm. The maximum distribution of the statistical frequency varied from 1.0 ppm to 1.5 ppm,The removing hydrogen from the low hydrogen steel rail by slow-cooling was hardly effective. The even removing hydrogen rate was only 18%and with a large fluctuation. Moreover,it was also found that,after the steel rail without slow-cooling was laid aside for three to four months at room emperature since hot-cutting,most of the diffusible hydrogen in the rail head would runaway. Based on above results,the authors suggest that,with some necessary steps,the slow-cooling technological procedure may be canceled in the manufacture of steel rail。

关 键 词：钢轨 氢 扩散 轧钢 除氢 钢液处理 

分 类 号：TF769[冶金工程—钢铁冶金] TG335.43[金属学及工艺—金属压力加工]