The rail produces bend during cooling, it must be straightened because the straightness is one of important target values to ensure the requirement of straightness.

• 摘要钢轨在冷却过程中产生弯曲，为保证钢轨平直度，必须对其进行矫直，因为平直度是钢轨在实际使用中保证安全的重要指标之一。