The surface residual stress of tube and bar after drawing straightening and annealing, under different processing conditions, were measured by means of resistance strain gauge.
用电阻应变片法测试了管棒材拉拔、矫直和退火过程中产品表面残余应力，研究了管棒材残余应力随工艺参数变化的规律。
The overall annealing can effectively reduce residual stress after welding, but in the cooling, very important to control of the cooling.
整体退火能有效地降低焊后残余拉应力，但在冷却时，对降温的控制非常重要。
The results show that the residual stress obviously decreases with the increase of annealing temperatures and time.
结果表明：随退火温度升高、时间延长，残余应力呈明显下降趋势。
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