Mechanism of reheat embrittlement and reheat crack is the same. Reheat embrittlement cannot be avoided by reducing stress.

再热裂纹与再热脆化的机理相同，两者同时发生，降低应力防止再热裂纹并不能防止再热脆化。

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Through the pipe sample cutting and analyzing the crack in the fillet weld between the hot reheat pipe and the warming pipe, it was found out that the cause of the crack is due to the thermal fatigue.

通过对再热热段至低旁暖管管道角焊缝上裂纹的解剖分析，其原因是热疲劳裂纹引起的。

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