通过对一种785 MPa级低合金高强度船体钢Ac1附近临界区热处理试样的性能测试,研究了Ac1附近临界区处理对其性能及屈强比的影响,采用光学和透射电镜观察了试验钢的微观组织,分析了试验钢性能与微观组织结构的相关性.结果表明:Ac1附近临界区热处理改变了试验钢的微观组织结构,热处理后钢板组织为回火马氏体基体上分布细小马氏体/M-A组元、碳化物、少量残留奥氏体、细小弥散的纳米铜析出相;多元复相组织中的转变马氏体及残留奥氏体降低了试验钢的屈服点,提高了钢板的加工硬化率和均匀伸长率,降低了试验钢的屈强比;同时,细化的组织结构保证了材料的塑韧性.
参考文献
| [1] | GUO Ai-min;Misra R D K;XU Jin-qiao et al.Ultrahigh strength and low yield ratio of nibium-microalloyed 900MPa pipeline steel with nano/ultrafine bainitic lath[J].Rare Metal Materials and Engineering,2012,527:3886-3892. |
| [2] | Antonio Augusto Gorni;Paulo Roberto Mei .Development of alternative as-rolled alloys to replace quenched and tempered steels with tensile strength in the range of 600-800 MPa[J].Journal of Materials Processing Technology,2005(0):298-303. |
| [3] | Y.M. KIM;S.K. KIM;Y.J. LIM .Effect of Microstructure on the Yield Ratio and Low Temperature Toughness of Linepipe Steels[J].ISIJ International,2002(12):1571-1577. |
| [4] | Movahed P;Kolahgar S;Marashi S P H et al.The effect of interitical heat treatment temperature on the tensile properties and work hardening behavior of ferrite-martensite dual phase steel sheets[J].Rare Metal Materials and Engineering,2009,518:1-6. |
| [5] | 康健,王昭东,王国栋,袁国,周晓光.建筑用高强度低屈强比钢板的冷却工艺[J].材料热处理学报,2010(11):79-84. |
| [6] | 焦多田,蔡庆伍,武会宾.轧后冷却制度对X80级抗大变形管线钢组织和屈强比的影响[J].金属学报,2009(09):1111-1116. |
| [7] | 高惠临.管线钢屈强比分析与评述[J].焊管,2010(06):10-14. |
| [8] | Z. Li;D. Wu .Study of the high strength and low yield ratio cold forging steel[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2007(1/2):142-148. |
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