Material for rail of crane is of strong strength because of high carbon content, but of poor weldability, which makes more cracks. Strict technique is required in such welding.

吊车轨道的材料由于其含碳量较高， 强度大， 可焊性较差， 焊接时容易产生裂纹， 因此要严格按照工艺执行。

youdao

Most of the cracks would propagate along the direction of plastic flow into the inside of the rail.

在靠近钢轨表面一定的深度内，裂纹萌生后基本上沿着塑性流变的方向向钢轨内部斜向下扩展。

youdao

This paper mainly analyzes the process of bloom casting for heavy rail and internal cracks like central crack and so on in order to solve the internal quality problems.

对方坯重轨钢系列铸坯内部产生的中间裂、中心裂等缺陷进行工艺探索研究，以解决生产过程中出现的内部质量问题。

youdao

The RMT union said cracks could have caused a "tragedy" but Network Rail had said no passengers were at risk.

BBC: Cracks in East Coast Main Line investigated

Two cracks discovered on the East Coast Main Line are being investigated by independent safety experts at the Rail Accident Investigation Branch (RAIB).

BBC: Cracks in East Coast Main Line investigated