ISSN:1003-8620

CN:42-1243/TF

主管:中信泰富特钢集团股份有限公司

主办:大冶特殊钢有限公司

特殊钢 ›› 2015, Vol. 36 ›› Issue (5): 47-50.

• 组织和性能 • 上一篇    下一篇

风电塔筒法兰用S355NL钢的低温冲击韧性

戈文英   

  1. 山东钢铁股份有限公司莱芜分公司特钢事业部,莱芜 271104
  • 收稿日期:2015-04-13 出版日期:2015-10-01 发布日期:2022-08-16
  • 作者简介:戈文英(1972-),男,硕士(2005年南京工业大学),高级工程师,1995年山东工业大学(本科)毕业,特殊钢新品种及工艺研发、标准管理。

Low Temperature Impact Toughness of Steel S355NL for Wind Power Tower Flange

Ge Wenying   

  1. Special Steel Division, Laiwu Company, Shandong Iron and Steel Co Ltd, Laiwu 271104
  • Received:2015-04-13 Published:2015-10-01 Online:2022-08-16

摘要: 试验和分析了风电塔筒法兰S355NL钢(/%:0.14C,0.22Si,1.35Mn,0.010P,0.002S,0.06Cr,0.01Mo,0.10Ni,0.03Cu,0.40Ceq)-20~-80℃切向和轴向冲击韧性。结果表明,S355NL钢V-型冲击功随试验温度降低而下降,切向试样的韧脆转变温度低于-80℃(-80℃平均冲击功76.89 J),轴向试样的韧脆转变温度在-65℃左右(-60℃平均冲击功96.10 J,-70℃13.28 J),冲击断口形貌由韧性剪切断口转变为准解理断口,直至具有"扇形"解理花样的完全解理断口。

关键词: 风电塔筒法兰钢S355NL, 低温冲击韧性, 韧脆转变温度, 冲击断口形貌

Abstract: The tangential and axial impact toughness of steel S355NL for wind power tower flange (/% : 0.14C, 0.22Si, 1.35Mn, 0.010P, 0.002S, 0.06Cr, 0.01Mo, 0.l0Ni, 0.03Cu, 0.40Ceq) at -20~-80℃ has been tested and analyzed. The results show that with decreasing test temperature the V-type impact energy of steel S355NL decreases, the ductile-brittle transition temperature of tangential specimen is lower than -80℃ ( average impact energy at -80℃ is 76.89 J) and the ductile-brittle transition temperature of axial specimen is about —65℃ (average impact energy at -60℃ is 96.10 J and that at -70℃ is 13.28 J ) , the morphology of impact fracture transfers from ductile shear fracture to quasi cleavage fracture and until to complete cleavage fracture with "fan-shaped" cleavage pattern.

Key words: Steel S355NL for Wind Power Tower Flange, Low Temperature Impact Toughness, Ductile-Brittle Transition Temperature, Morphology of Impact Fracture