为了使控轧控冷工艺生产的高性能Q500qE桥梁钢具有较低的屈强比和良好的韧性,采用Gleeble-3800试验机模拟了试验钢不同冷速控冷工艺,研究了冷速对组织和力学性能的影响.结果表明:5～25℃/s冷却速率下形成针状铁素体、粒状贝氏体铁素体和少量弥散M-A岛构成的多相组织.随冷速增加,铁素体晶粒细化,M-A岛尺寸减小;强度和屈强比提高,冲击功先升高后降低.试验钢满足力学性能要求的控冷冷却速率范围是15～20℃/s.
参考文献
| [1] | 洪君,陈钊.低屈强比高强度结构钢的发展概况[J].鄂钢科技,2011(2):54.,2011. |
| [2] | 郭爱民.我国铁路桥梁用钢的发展现状及展望[J].铁路采购与物流,2007(12):25-26. |
| [3] | 张丕军 .800MPa级针状铁素体马氏体双相钢厚板的研制[D].东北大学,2006. |
| [4] | FAN Lei,ZHOU De-hui,WANG Tong-liang,et al .Tensile Properties of an Acicular Femte and Martensite/Austenite Constituent Steel With Varying Cooling Rate[J].Mater Sci Eng:A,2014,590 |
| [5] | Yakubtsov I A,Poruks P,Boyd J D .Microstmcture and Mechanical Properties of Bainitic Low Carbon High Strength Plate Steels[J].Mater Sci Eng:A,2008,480 |
| [6] | Morales E V .Strengthening Mechanisms in a Pipeline Microalloyed Steel With a Complex Microstructure[J].Mater Sci Eng:A,2013,585 |
| [7] | WANG Qing-feng,ZHANG Chuan-you,LI Rui-xin,et al .Characterization of the Microstmctures and Mechanical Properties of 25CrMo48V Martensitic Steel Tempered at Different Times[J].Mater Sci Eng:A,2013,559 |
| [8] | Lehto E An Approach to Define the Effective Lath Size Controlling Yield Strength of Bainite[J].Mater Sci Eng:A,2014,592 |
| [9] | Ashby M F.Strengthening Methods in Crystals[M].London:Elsevier,1971.,1971. |
| [10] | Irwin G R.Fracturing of Metals[M].Ohio:American Society for Metals,1984.,1984. |
| [11] | Davis C L,King J E .Cleavage Initiation in the Intercritically Reheated Coarse-Grained Heat-Affected Zone:Part Ⅰ.Fractographic Evidence[J].Metall Mater Trans:A,1994,25 |
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