如何保证钢轨淬火质量，是一个十分重要的问题。

Then the paper proposes the idea of "technical assurance on the quenching quality of rail" and deals with its execution method.

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而淬火引入非均匀的结构应力且梯度较小，主要发生应力重分布。

However, stress re-distribution would occur in the non-uniform structural stress introduced by quenching with a low stress gradient.

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介绍重熔淬火硬化处理凸轮轴工艺，以及供重熔淬火用的壳型凸轮轴的生产工艺。

The sedan camshafts re-melting and chilling process and production technique of shell mold camshaft castings to be re-melted and chilled were introduced.

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