在Mo-Ni-Cu-Cr系合金化贝氏体球墨铸铁中添加了质量分数为0．3％的钒，研究了钒的添加对该球墨铸铁显微组织和力学性能的影响；结合 Thermal-Calc热力学软件计算了该含钒球墨铸铁的平衡相图，分析了钒的析出行为.结果表明：当添加0．3％钒后，该球墨铸铁组织中针状贝氏体变得细小，残余奥氏体和渗碳体含量增加，在贝氏体基体中弥散分布着纳米尺度的VC颗粒；添加0．3％钒球墨铸铁的硬度比不加钒的略有增大，冲击功和耐磨性提高了1倍，其主要强化机制为细晶强化和析出强化；含钒和不含钒球墨铸铁的磨损机制均为塑性变形疲劳和显微切削.
0.3wt% vanadium (V)was added in the Mo-Ni-Cu-Cr alloyed bainitic ductile iron,then the effects of V addition on the microstructure and mechanical properties of the bainitic ductile iron were investigated.The equilibrium phase diagram of the bainitic ductile iron containing 0.3wt%V was calculated by the thermal-calc thermodynamic software and the precipitation behavior of V was analyzed.The results show that with the addition of 0.3wt% V,the needle-like bainite in the microstructure of the ductile iron became finer;the amount of residual austenite and cementite increased;the nano-scaled VC particles distributed dispersedly in the matrix of bainite. Comparing to the ductile iron without V,the hardness of the ductile iron with 0.3wt%V increased slightly and the impact energy and wear resistance had more than doubled.The main strengthening mechanisms were the fine grain strengthening and precipitation hardening.The wear mechanisms of the ductile irons with and without V were both plastic deformation fatigue and micro-cutting.
参考文献
| [1] | Murcia, S.C.;Paniagua, M.A.;Ossa, E.A..Development of as-cast dual matrix structure (DMS) ductile iron[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2013:8-15. |
| [2] | 魏德强;薛兴;恽志东.低合金贝氏体球墨铸铁磨球热处理工艺参数的确定[J].机械工程材料,2006(7):59-62. |
| [3] | A. Basso;J. Sikora.REVIEW ON PRODUCTION PROCESSES AND MECHANICAL PROPERTIES OF DUAL PHASE AUSTEMPERED DUCTILE IRON[J].International Journal of Metalcasting: Leading the Transfer of Research and Technology for the Global Metalcasting Industry,20121(1):7-14. |
| [4] | M. Martinez Celis;N. Valle;J. Lacaze;I. O. Thorbjornsson;B. Johannesson;J. T. Thorgrimsson.Microstructure of as cast reinforced ductile iron[J].International Journal Cast Metals Research,20112(2):76-82. |
| [5] | Junjun Cui;Hongyun Zhang;Liqing Chen;Haizhi Li;Weiping Tong.Microstructure and Mechanical Properties of a Wear-Resistant As-Cast Alloyed Bainite Ductile Iron[J].金属学报（英文版）,2014(3):476-482. |
| [6] | 翟启杰;陈迪林;朱玉龙;邢长虎;翟华英;张锁梅.贝氏体球墨铸铁中钒的形态[J].钢铁研究学报,2001(4):50-52. |
| [7] | 杨世能;李生志;孙锋;单爱党.钒和铜对11Cr-2W低活化马氏体钢组织和高温力学性能的影响[J].机械工程材料,2015(1):9-13,19. |
| [8] | 刘克明;王福明;郝经伟;余煌.钒对中铬白口铸铁组织和性能的影响[J].北京科技大学学报,2004(6):604-607,626. |
| [9] | 李翼;杨忠民.Ⅴ对高碳钢连续冷却时组织转变的影响[J].金属学报,2010(12):1501-1510. |
| [10] | 马永华;孙玉福;赵靖宇;肖志云;杨会龙;王刘利;王璐;司光东.钒对含碳化物等温淬火球墨铸铁组织及性能的影响[J].铸造,2011(8):779-783. |
| [11] | 吴化;姜颖;尤申申;韩英;刘云旭.超级贝氏体组织中残余奥氏体的TRIP效应研究[J].机械工程学报,2014(22):69-75. |
| [12] | C. CAPDEVILA;C. GARCIA-MATEO;J. CORNIDE.Effect of V Precipitation on Continuously Cooled Sulfur-Lean Vanadium-Alloyed Steels for Long Products Applications[J].Metallurgical and Materials Transactions, A. Physical Metallurgy and Materials Science,201112(12):3743-3751. |
| [13] | 胡军;杜林秀;王万慧;李晶.590 MPa级热轧V-N高强车轮钢组织性能控制[J].东北大学学报（自然科学版）,2013(6):820-823. |
| [14] | P. H. S. Cardoso;C. L. Israel;T. R. Strohaecker.Abrasive wear in Austempered Ductile Irons: A comparison with white cast irons[J].Wear: an International Journal on the Science and Technology of Friction, Lubrication and Wear,20141/2(1/2):29-33. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%