Welded pipe that bended by hot bending method with a set of specific die and welded by plasma arc welding method was used as tubular blank of SPF.
采用焊管作为管坯 ，焊管弯曲采用专用模具热弯 ，焊接采用等离子弧焊。超塑成形采用多层模结构 ，用模具来控制波形。
The invention discloses a hot-rolled steel air cooling and stacking method capable of reducing bending of a rail to ensure straightness of the straightened rail to meet standard requirement.
本发明公开了一种可减小钢轨弯曲度的热轧钢轨的空冷堆垛方法，保证矫直后钢轨的平直度达到标准的要求。
The invention discloses a hot-rolled steel air cooling and stacking method capable of reducing bending of a rail to ensure straightness of the straightened rail to meet standard requirement.
本发明公开了一种可减小钢轨弯曲度的热轧钢轨的空冷堆垛方法，保证矫直后钢轨的平直度达到标准的要求。
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