新型S690低合金高强度钢Φ219 mm x 14mm无缝管的CCT曲线和调质工艺研究

特殊钢 ›› 2018, Vol. 39 ›› Issue (4): 12-16.

新型S690低合金高强度钢Φ219 mm x 14mm无缝管的CCT曲线和调质工艺研究

潘先明，杜坤，李刚，向华钧，杨煌光，王川

湖北新冶钢有限公司钢管研究所，黄石435001

收稿日期:2018-02-05 出版日期:2018-08-01 发布日期:2022-05-31
作者简介:潘先明(1971-),男，高级工程师,1992年武汉科技大学(本科)毕业，钢铁材料研究及无缝钢管品种开发。

A Study on CCT Curves and Quenching-Tempering Process of New HSLA Steel S690 Φ219 mm x 14 mm Seamless Tube

Pan Xianming, Du Kun, Li Gang, Xiang Huajun, Yang Huangguang ，Wang Chuan

Tube Research Institute, Hubei Xinyegang Co Ltd, Huangshi 435001

Received:2018-02-05 Published:2018-08-01 Online:2022-05-31

摘要/Abstract

摘要： 测定了S690钢管（/%:0.15C,0.25Si,1.32Mn,0.012P,0.005S,0.20Cr,0.04Al,0.08V）0.01～30℃/s冷却速率下连续冷却转变（CCT）曲线,并研究了890～970℃淬火,600～690℃回火对其组织和力学性能的影响。结果表明,S690钢管相变点Ac₃为828℃,Ac₁为753℃,Ms为395℃,临界冷却速率为13℃/s,存在铁素体、珠光体、贝氏体,马氏体4个相变区;选择910～930℃淬火,钢管的组织较细小均匀,平均晶粒尺寸13.9μm,具有较高的硬度,HRC值42.5;在615～675℃回火,钢管可得到均匀的回火索氏体组织,其综合力学性能优良。

Abstract: The continuous cooling transformation (CCT) curves of S690 steel tube (/% : 0.15C, 0.25Si, 1.32Mn, 0.012P, 0. 005S, 0.20Cr, 0.04Al, 0.08V) with cooling rate 0. 01 ~30℃/s are measured and the effect of quenching at 890 〜970 ℃ and tempering at 600 〜690℃ on structure and mechanical properties of the steel has been studied. Results show that the phase transformation points of steel S690 seamless tube are Ac₃ 828 °C , Ac₁ 753 ℃, Ms 395 ℃, and the critical cooling rate of steel is 13 ℃/s, and there are ferrite, pearlite, bainite and martensite four transformation zone； with selecting quenching at 910 ~930 ℃, the structure of steel tube is uniform and fine with average grain size 13.9μm, and the steel has higher hardness with HRC value 42.5 ；with tempering at 615 - 675 ℃，the steel tube has uniform tempered sorbite structure and better comprehensive mechanical properties.

潘先明, 杜坤, 李刚, 向华钧, 杨煌光, 王川. 新型S690低合金高强度钢Φ219 mm x 14mm无缝管的CCT曲线和调质工艺研究[J]. 特殊钢, 2018, 39(4): 12-16.

Pan Xianming, Du Kun, Li Gang, Xiang Huajun, Yang Huangguang , Wang Chuan. A Study on CCT Curves and Quenching-Tempering Process of New HSLA Steel S690 Φ219 mm x 14 mm Seamless Tube[J]. Special Steel, 2018, 39(4): 12-16.

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