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超高强度结构钢的组织细化及韧性改善
Refinement of microstructure and enhancement of absorption for ultra-strength constructional steel
【摘要】 通过合理设计化学成分以及有效地优化热处理工艺,新研制的系列贝氏体结构钢在保证超高强度(σb>1400MPa)条件下,塑性与韧性配合良好,且V型缺口冲击能(AKV>140J)与同强度级别的马氏体钢相比提高一倍多.结合显微分析结果,深入地讨论了韧性改善的物理机制.
【Abstract】 A series of bainitic structural steels with excellent combination of plasticity and toughness was developed by the reasonable design of chemical composition and effective optimization of heat treatment process.On condition that the ultimate tensile strength is over 1470 MPa,the impact energy absorption of V-type notch(A KV≥132 J) has been doubled compared with that of the previously advanced martensitic steel with same strength level(σ b >1560 MPa).Based on the results of microstructure analysis,the physical mechanism on the improvement of toughness was deeply discussed.
【关键词】 超高强度钢；
抗拉强度；
冲击能；
铁素体板条；
亚结构；
【Key words】 ultra-strength steel； tensile strength； impact energy absorption； ferrite lath； sub-structure；
【Key words】 ultra-strength steel； tensile strength； impact energy absorption； ferrite lath； sub-structure；
【基金】 陕西省教育厅专项基金赞助项目(08jk487);延安市科技计划赞助项目(2008kg-08,23008ks-29)
- 【文献出处】 材料科学与工艺 ,Materials Science and Technology , 编辑部邮箱 ,2010年03期
- 【分类号】TG142.41
- 【被引频次】1
- 【下载频次】2871