EFFECT OF ALLOYING ELEMENT Al ON HARDENABILITITY AND MECHANICAL PROPERTIES OF MICRO-B TREATED ULTRA-HEAVY PLATE STEELS
Received date: 2013-11-21
Revised date: 2014-01-27
Online published: 2014-04-20
Supported by
Supported by National Key Technology R&D Program (No.2011BAE25B01)
Utilizing Jominy end quenching test, chemical phase analysis and thermo-dynamical calculation, study of the effect of alloying elements on hardenability and mechanical properties of a B-bearing ultra-heavy plate steel was carried out. The results showed that small amount of Ti addition could form TiN for its much higher bonding ability than B, fixing N element and thus making B free. Normal Al content failed to prevent BN from precipitating due to the weaker competition for N than B. However, when Al content was increased as high as 0.07%, the competition of Al for N was distinctly improved, making solid-solution B increased. For proper chemical combination of B and N-fixing element, hardenability was increased and accordingly both microstructure and mechanical properties were improved so that the quantity and size of martensite/austenite (M/A) islands and granular bainite were decreased markedly, and low-temperature impact toughness and tensile properties were improved by a large degree. The calculation was in a good accord with experimental results.
Key words： ultra-heavy plate; hardenability; BN; granular bainite; AlN; thermo-dynamical calculation
Tao PAN , Xiaoyong WANG , Hang SU , Caifu YANG . EFFECT OF ALLOYING ELEMENT Al ON HARDENABILITITY AND MECHANICAL PROPERTIES OF MICRO-B TREATED ULTRA-HEAVY PLATE STEELS[J]. Acta Metall Sin, 2014 , 50(4) : 431 -438 . DOI: 10.3724/SP.J.1037.2013.00754
| [1] | Li R P, Xie Y H, Shu Z. China Offshore Platform, 2003; 18(3): 1 |
| [1] | (李润培, 谢永和, 舒 志. 中国海洋平台, 2003;18(3): 1) |
| [2] | Di G B, Liu Z Y, Hao L Q, Liu X H. Mater Mech Eng, 2008; 32(8): 1 |
| [2] | (狄国标, 刘振宇, 郝利强, 刘相华. 机械工程材料, 2008; 32(8): 1) |
| [3] | Otani K, Muroka H, Tsuruta S, Hattori K, Kawazoe H. Nippon Steel Technol Rep, 1993; 58: 1 |
| [4] | Sharp J V, Binlingham J, Stacey A. Marine Struct, 1999; 12: 349 |
| [5] | Taylor K A. ISS Trans, 1993; 14: 7 |
| [6] | Zhang Y Q, Zhang R J, Su H, Li L. Iron Steel, 2003; 38(11): 45 |
| [6] | (张永权, 张荣久, 苏 航, 李 丽. 钢铁, 2003; 38(11): 45) |
| [7] | Gao Y F. PTCA (Part A: Physical Testing), 2000; 36: 442 |
| [7] | (高玉芳. 理化检验-物理分册, 2000; 36: 442) |
| [8] | Izeki Y, Saiki K, Saiki K, Nakamura M, Ohtani H, Watanabe S. Sumitomo Search, 1976; 15(5): 27 |
| [9] | Iwasaki N, Tagawa H, Watanabe I, Yamada M, Nagamine T, Endo G. Nippon Kokan Technical Report Overseas, 1980; 30: 1 |
| [10] | Takizawa K, Kaji H, Yano K, Okano S. Shinko Steel Technical Report, 1987; 3: 79 |
| [11] | Chen A Z, Niu J C, Deng W P. Develop Appl Mater, 2010; (1): 9 |
| [11] | (陈爱志, 牛继承, 邓晚平. 材料开发与应用, 2010; (1): 9) |
| [12] | Saiga Y. ISIJ Int, 1989; 29: 799 |
| [13] | Chen Z, Wu X C, Wang H B, Min Y A, Zhang H K. J Iron Steel Res, 2008; 20(10): 40 |
| [13] | (陈 卓, 吴晓春, 汪宏斌, 闵永安, 张洪奎. 钢铁研究学报, 2008; 20(10): 40) |
| [14] | Pan T, Wang X Y, Wang H, Li Y, Su H, Yang C F. J Iron Steel Res Int, 2011<br/>(suppl): 242 |
| [15] | Watanabe S, Ohtani H, Kunitaki T. Trans ISIJ, 1983; 23: 120 |
| [16] | Paju M. Iron Steel, 1992; 19: 495 |
| [17] | Habu R, Miyata M, Tamukai S, Sekino S. Trans ISIJ, 1983; 23: 176 |
| [18] | Shen Y, Hansen S S. Metall Mater Trans, 1997; 28A: 2027 |
| [19] | Cias W W. Metall Trans, 1973; 4: 603 |
| [20] | Tomita Y, Okabayashi K. Metall Trans, 1986; 7A: 1203 |
| [21] | Luo Z J, Shen J C, Su H, Ding Y H, Yang C F, Zhang Y Q, Ma Y. Trans Mater Heat Treat, 2010; 31(10): 63 |
| [21] | (罗志俊, 沈俊昶, 苏 航, 丁跃华, 杨才福, 张永权, 马 跃. 材料热处理学报, 2010; 31(10): 63) |
| [22] | Wang C F, Wang M Q, Shi J, Hui W J, Dong H. Scr Mater, 2008; 58: 492 |
| [23] | Fang H S, Liu D Y, Bai B Z, Chang K D, Gu J L, Yang Z G. Heat Treat Met, 2001; 26(10): 4 |
| [23] | (方鸿生, 刘东雨, 白秉哲, 常开地, 顾家琳, 杨志刚. 金属热处理, 2001; 26(10): 4) |
| [24] | Melloy G F, Summon P R, Podgursky P P. Metall Trans, 1973; 4: 2279 |
| [25] | Shikanai N, Kagawa H, Kurihara M. ISIJ Int, 1992; 32: 335 |
/
| 〈 |
|
〉 |
