焊后正火工艺对钢轨接头强韧性的影响

发布时间：2018-03-12 14:23

  本文选题：钢轨　切入点：正火工艺　出处：《热加工工艺》2016年19期 　论文类型：期刊论文

【摘要】：针对60 kg/m U75VG钢轨焊后正火如何最大限度地获得细化晶粒效果问题,选择了加热气体流量、加热时间和冷却速度三因素,按照三因素三水平的正火正交试验设计方案,开展了正火工艺试验研究。结果表明:采用最佳的焊后正火工艺,对闪光焊接头进行焊后正火热处理,能使接头晶粒明显细化(晶粒度达到9级左右),冲击韧性明显提高,提高了钢轨焊接接头的强韧性。
[Abstract]:In order to solve the problem of how to obtain the maximum grain refinement effect by normalizing 60 kg/m U75VG rail after welding, three factors of heating gas flow rate, heating time and cooling rate are selected, and the design scheme of normalizing orthogonal test is based on three factors and three levels. The experimental study on normalizing process has been carried out. The results show that the grain size of the joint can be obviously refined (the grain size of the joint is about 9 grade and the impact toughness is obviously improved by adopting the best post-welding normalizing process and normalizing heat treatment after welding on the flash welding joint). The strength and toughness of rail welded joints are improved.
【作者单位】： 西南交通大学材料科学与工程学院焊接研究所;
【分类号】：U213.92;TG441.8
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本文编号：1601945