Micro-deformation stress relief annealing process for precise cold-drawn seamless tube

The invention discloses a micro-deformation stress relief annealing process for a precise cold-drawn seamless tube, which comprises the following steps: carrying out rough shaping on a cold-drawn seamless tube, carrying out annealing treatment on the seamless tube subjected to rough shaping, and carrying out fine shaping and annealing treatment on the seamless tube subjected to annealing post-treatment: orderly placing the seamless tube in an annealing furnace, the suspension length of the two ends is smaller than or equal to 0.5 m, the annealing temperature ranges from 400 DEG C to 450 DEG C, the heat preservation time ranges from 2 h to 2.5 h, controlled cooling is conducted to 300 +/-10 DEG C, and discharging and air cooling are conducted; the method can improve the production efficiency, improve the product quality and reduce the energy consumption. 本发明公开一种精密冷拔无缝管微变形去应力退火工艺，包括如下步骤：对冷拔后的无缝管进行粗整形、对粗整形后的无缝管进行退火处理、对退火后处理后的无缝管进行精整形，退火处理：将无缝管整齐摆放在退火炉中，两端悬空长度长度≤0.5m，退火温度为400-450℃，保温时间2-2.5h，控冷至300±10℃,出炉空冷；使用该方法