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用电阻应变片法测试了变形锡黄铜ＨＳｎ７０－１管材表面的残余应力，分析了拉拔管材变形参数对管材表面残余应力及其他性能指标的影响规律。结果表明，增大管材的减壁变形，可以显著地减小管材表面的拉伸残余应力，当减壁比ｔ０／ｔ１大于１．２时，拉拔管材的残余应力较小，经成品退火后管材晶粒组织细小。采用不同变形方法生产的管材，其表面残余应力也遵循这一规律。２辊冷轧管材有很大的减壁变形，其表面产生了很大的压应力，而冷卷管材无减壁变形，则表面产生了很大的拉应力。对拉拔变形管材退火工艺参数进行了试验，用管材晶粒度指标进行评价，优化了辊底式连续退火炉管材通过速度和退火温度，保证管材获得均匀细小的再结晶组织，较好地消除了变形管材的残余应力。
Residual strain on the surface of HSn70-1 was measured by resistance strain gage method. The influence of deformation parameters on the residual stress and other properties of pipe surface was analyzed. The results show that increasing the pipe wall deformation can significantly reduce the tensile residual stress on the pipe surface. When the wall reduction ratio t0 / t1 is greater than 1.2, the residual stress of the pipe drawing is small. After the finished product is annealed Pipe grain structure is small. Pipe using different deformation methods, the surface residual stress also follow this rule. 2 roll cold-rolled pipe has a large reduction of wall deformation, the surface produced a lot of compressive stress, and cold-rolled pipe without wall deformation, the surface has a lot of tensile stress. The parameters of annealing process of drawing deformed tube were tested and the grain size index of the tube was used for evaluation to optimize the passing speed and annealing temperature of the tube in continuous roll annealing furnace so as to ensure uniform and fine recrystallized structure of the tube and to eliminate it well Deformation of the pipe residual stress.