测定了不含Mo和Ni、含Ni和含Mo三种成分实验钢的CCT曲线,利用扫描电镜、透射电镜观察了连续冷却及轧后空冷条件下三种钢的显微组织变化,并对其力学性能进行了检测分析.结果表明:添加少量Mo和Ni能有效延迟高强无碳化物贝氏体钢CCT曲线中高温铁素体相变,降低Ms点,促进贝氏体相变.Mo和Ni的添加可使实验钢轧后空冷组织由铁素体+粒状贝氏体+M/A混合组织转变为无碳化物贝氏体组织(BF+ AR),Ni对贝氏体板条的细化作用比Mo显著,但组织中会出现少量粗大贝氏体;Mo对轧后相变过程中粗大贝氏体的形成有一定抑制作用,可使获得的无碳化物贝氏体组织均匀性更好.Mo和Ni均可有效提高高强无碳化物贝氏体钢的力学性能,其中Ni对抗拉强度的提升作用强于Mo,而Mo则更有利于冲击韧性的提高.含Ni的2#实验钢抗拉强度比不加Ni和Mo的1 #实验钢提高252MPa,含Mo的3#实验钢-20℃下冲击吸收功比1 #提高11J.
参考文献
| [1] | F. G. Caballero;H. K. D. H. Bhadeshia;K. J. A. Mawella .Design of novel high strength bainitic steels: Part 1[J].Materials Science and Technology: MST: A publication of the Institute of Metals,2001(5):512-516. |
| [2] | F. G. Caballero;M. J. Santofimia;C. Capdevila .Design of advanced bainitic steels by optimisation of TTT diagrams and T_0 curves[J].ISIJ International,2006(10):1479-1488. |
| [3] | 方鸿生,刘东雨,常开地,张弛,顾家琳,张文征,白秉哲,杨志刚.1 500 MPa级经济型贝氏体/马氏体复相钢的组织与性能[J].钢铁研究学报,2001(03):31-36. |
| [4] | 高宽,王六定,朱明,陈景东,施易军,康沫狂.低合金超高强度贝氏体钢的晶粒细化与韧性提高[J].金属学报,2007(03):315-320. |
| [5] | E. Kozeschnik;H. K. D. H. Bhadeshia .Influence of silicon on cementite precipitation in steels[J].Materials Science and Technology,2008(3):343-347. |
| [6] | A. Saha Podder;H.K.D.H. Bhadeshia .Thermal stability of austenite retained in bainitic steels[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2010(7/8):2121-2128. |
| [7] | 黄进峰,方鸿生,徐平光,郑燕康.硅对中低碳贝氏体铸钢组织和性能的影响[J].金属热处理,2000(06):2-5. |
| [8] | A. Barbacki;E. Mikolajski .Optimization of heat treatment conditions for maximum toughness of high strength silicon steel[J].Journal of Materials Processing Technology,1998(1/3):18-23. |
| [9] | F.G. Caballero;M.J. Santofimia;C. Garcia-Mateo;J. Chao;C. Garcia de Andres .Theoretical design and advanced microstructure in super high strength steels[J].Materials & design,2009(6):2077-2083. |
| [10] | 徐光;王巍;张鑫强.金属材料CCT曲线测定及绘制[M].北京:化学工业出版社,2009 |
| [11] | 曹艺,王昭东,吴迪,王国栋,张逖.Mo和Ni对低合金耐磨钢连续冷却转变的影响[J].材料热处理学报,2011(05):74-78. |
| [12] | 周洪宝,蔡庆伍,武会宾,张杰,陈雨来.连续缓慢冷却贝氏体转变特征及合金元素分布的影响[J].材料工程,2011(12):10-15. |
| [13] | KEEHAN E;KARLSSON L;ANDREN H O .Influence of carbon,manganese and nickel on microstructure and properties of strong steel weld metals[J].Science and Technology of Welding & Joining,2006,11(01):1-8. |
| [14] | H.K.D.H. Bhadeshia;E. Keehan;L. Karlsson .COALESCED BAINITE[J].Transactions of the Indian Institute of Metals,2006(5):689-694. |
| [15] | 谭起兵 .稀土对Mn-RE系贝氏体钢相变动力学及组织的影响[D].贵州大学,2008. |
| [16] | 李洪波,刘向东,金宝士,黄志求.一种新型低碳贝氏体钢的研制[J].佳木斯大学学报（自然科学版）,2006(01):19-21. |
| [17] | S. Chatterjee;H. K. D. H. Bhadeshia .TRIP-assisted steels: cracking of high-carbon martensite[J].Materials Science and Technology: MST: A publication of the Institute of Metals,2006(6):645-649. |
| [18] | F.G. Caballero;J.Chao;J. Cornide;C.Garcia-Mateo;M.J. Santofimia;C.Capdevila .Toughness deterioration in advanced high strength bainitic steels[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2009(1/2):87-95. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%