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探讨了外端加厚油管的喷雾正火装置和工艺，提出了高温快冷、低温缓冷的工艺措施，取得了工件力学性能合格、变形小的结果
The spray normalizing device and technology of thickened oil pipe at the outer end were discussed. The technological measures of rapid cooling at high temperature and slow cooling at low temperature were put forward. The mechanical properties of the workpiece were qualified and the deformation was small