|
|||||
|
|
| 80mm厚高韧性工程机械用Q460级TMCP钢的研制 | |
| 引用本文： | 李德发,王世森,邢淑清,熊涛.80mm厚高韧性工程机械用Q460级TMCP钢的研制[J].钢铁钒钛,2012,33(4):81-85. |
| 作者姓名： | 李德发 王世森 邢淑清 熊涛 |
| 作者单位： | 1. 内蒙古科技大学材料与冶金学院,内蒙古包头014010;武钢研究院,湖北武汉430080 2. 武钢研究院,湖北武汉,430080 3. 内蒙古科技大学材料与冶金学院,内蒙古包头,014010 |
| 基金项目： | 内蒙古自然科学基金资助项目，内蒙古科技大学材料加工过程模拟创新团队基金项目 |
| 摘 要： | 采用低碳Cr-Mo系添加微量强碳化物形成元素的成分设计,通过TMCP工艺控制,获得均匀铁素体/贝氏体组织,充分发挥析出强化、细晶强化和贝氏体组织强化作用,研制80 mm厚高韧性工程机械用Q460钢。试制钢板力学性能均匀,不仅具有良好的拉伸力学性能,且低温冲击韧性优良,-60℃冲击功大于180 J,冲击断口呈明显塑性变形;SEM分析表明,断口微观形貌韧窝特征明显,面积约为55%,韧窝内圆形氧化物夹杂细小;钢板厚度方向铁素体/贝氏体组织均匀,晶粒尺寸约为8～10μm;TEM分析表明,晶内存在高密度位错,大量细小弥散的第二相粒子沿位错线析出。 |
| 关 键 词： | 特厚板 高韧性 高强度 TMCP工艺 |
Development of 80 mm Thick Q460 Grade TMCP Plate with High Toughness for Engineering Machinery |
|
| Li Defa , Wang Shisen , Xing Shuqing , Xiong Tao.Development of 80 mm Thick Q460 Grade TMCP Plate with High Toughness for Engineering Machinery[J].Iron Steel Vanadium Titanium,2012,33(4):81-85. | |
| Authors: | Li Defa Wang Shisen Xing Shuqing Xiong Tao |
| Affiliation: | 1.Materials and Metallurgy School,Inner Mongolia University of Science and Technology,Baotou 014010,Inner Mongolia,China;2.Research and Development Center of Wuhan Iron and Steel(group) Corp.,Wuhan 430080,Hubei,China) |
| Abstract: | Based on low carbon and Cr-Mo with powerful carbide added,the 80mm thick Q460 grade plate for engineering machinery use was successfully trial-produced by TMCP process.Ultrafine grain and precipitated phase and bainite were fully taken advantage of to increase strength.By means of metallographic examination and inspection of mechanical properties,the results showed that the studied steel was composed of uniform ferrite and bainite,and had good mechanical properties including tensile property and low temperature impact toughness;AKV under-60 ℃ was more than 180 J,and the impact fracture exhibited plastic deformation;SEM analysis showed that the area of dimple fracture was about 55%,and small inclusion in dimple was circular oxide.The result of TEM showed that high density dislocation existed in crystalline grain,and a large number of dispersed fine second-phase particles were separated out along dislocation line in the steel. |
| Keywords: | extra-thick plate high toughness high strength TMCP process |
| 本文献已被 CNKI 万方数据 等数据库收录！ | |