The yield strength decrease of SSAW and ERW tube body can be attributed to both Bauschinger Effect and high springback stress incurred by manufacturing process.

 
  • 制管過(guò)程中的包申格效應及制管過(guò)程中引入的高彈復應力 ,使螺旋焊管及直縫焊管管體屈服強度明顯低于板卷屈服強度。
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