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在剖析生产钻杆的现用热处理设备的基础上 ,提出采用就地喷雾气冷方案 ,并采用气流量放大原理 ,研制了气流放大喷雾器。既大大地节约供气量 ,又增加气流射速 ,提高冷却速率。研究解决了环形喷雾器喷雾不均匀的问题 ,改进了气雾喷嘴 ,使其伸入到内孔并接近焊缝处。生产试验证实 :加热后感应圈退出焊缝区 ,同时把喷雾器移近焊缝 ,使气雾能直接喷射到焊缝上 ,钻杆焊缝用喷雾冷却热处理后 ,冲击韧性值不但满足要求 ,而且大幅度地提高
Based on the analysis of the existing heat treatment equipment for the production of drill pipe, the air-cooling sprayer was put forward by adopting the in-place spray air-cooling scheme and the principle of air flow amplification. Not only greatly save the gas supply, but also increase the rate of air jet and improve the cooling rate. The research solves the problem of uneven spraying of the annular sprayer, improves the aerosol nozzle so that it extends into the bore and approaches the weld. The production test confirmed that the induction coil is withdrawn from the weld zone after heating and the sprayer is moved close to the weld so that the aerosol can be directly sprayed onto the weld. After the drill pipe weld is spray-cooled and heat-treated, the impact toughness value not only meets the requirement, Dramatically improve