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 ›› 2010, Vol. 31 ›› Issue (1): 63-65.

• 组织和性能 • 上一篇    下一篇

变形奥氏体的冷却速度对X80管线钢组织和性能的影响

曾宪平, 卢俊毅, 王文录   

  1. 邯郸钢铁集团邯宝公司,邯郸056002)
  • 收稿日期:2009-08-11 出版日期:2010-02-01 发布日期:2022-10-27
  • 作者简介:曾宪平(1971-),男,工程师,1996年华东冶金学院毕业,钢铁材料质量控制和金属压力加工。

Effect of Cooling Rate of Hot-Deformed Austenite on Structure and Property of X80 Pipeline Steel

Zeng Xianping,  Lu Junyi ,Wang Wenlu   

  1. Hanbao Co, Handan Iron and Steel Group, Handan 056002
  • Received:2009-08-11 Published:2010-02-01 Online:2022-10-27

摘要: 通过Gleeble-1500热模拟试验机测定了X80管线钢(%:0.05C、0.17Si、1.78Mn、0.40Mo、0.08Nb、0.03V、0.03Ti)18 mm板经1100℃,1 s-1,40%变形,再以5℃/s冷至850℃,1 s-1,40%变形,并以1~40℃/s冷却至室温后的连续冷却转变(CCT)曲线,同时研究了冷却速度对组织和HV硬度的影响。结果表明,随冷却速度提高晶粒细化,针状铁素体比例增加,同时HV硬度提高。为得到较佳的组织,热变形后钢的冷却速度应≥15℃/s。


关键词: X80管线钢, CCT曲线, 热变形, 冷却速度, 组织, 硬度

Abstract: The continuous cooling transformation (CCT) curves of 18 mm plate of X80 pipeline steel (% : 0. 05C, 0. 17Si, 1.78Mn, 0. 40Mo, 0.08Nb, 0.03V, 0. 03Ti) with 1 s-1 and 40% deforming at 1 100°C , then 5 T/s cooling to 850 °C , 1 s-1 and 40% deforming and 1 ~40 °C/s cooling to ambient temperature were determined by Gleeble-1500 ther- mo-simulition machine and the effect of cooling rate on structure and HV hardness of steel was studied. Results show that with increasing cooling rate, the grains fine, the proportion of acicular ferrite in structure increases and the HV hardness of structure also increases. In order to get better structure, the cooling rate of hot-deformed steel should be ≥15 °C/s.

Key words: X80 Pipeline Steel, CCT Curves, Hot-Deforming, Cooling Rate, Structure, Hardness