The influence of rare earths (RE) on solidification behavior of a high speed steel for roll was investigated by using differential scanning calorimetry (DSC) in combination of microstructure analysis.It was found that the sequence of solidification was L→γ,L→γ+MC,L→γ+M2C,L→γ+M6C,respectively.The start temperature and the latent heat liberated by unit mass of L→γ and L→γ+MC increased with increase of RE addition,indicating that RE could trigger the crystallization of the primary γ and the MC carbide more effectively.The promoting effect of RE on the heterogeneous nucleation was believed to be an important cause of this effect.Grain refinement,discontinuous network of eutectic carbides and disperse and finer MC were observed in the samples with RE addition,moreover,RES could act as the heterogeneous nucleus of the MC.RE addition was favorable for stable M6C at the expense of the metastable M2C.
参考文献
| [1] | Lin S C;Fu H G .Progresses in research on the high speed steel roll[J].Wide and Heavy Plate (in Chin ),2003,9(01):3. |
| [2] | Hwang K C;Lee S;Lee H C .Effects of elements on microstructure and fracture properties of cast high speed steel rolls Part Ⅰ:Microstructural analysis[J].Materials Science and Engineering,1998,254A(1-2):282. |
| [3] | M. Boccalini;H. Goldenstein .Solidification of high speed steels[J].International Materials Reviews,2001(2):92-115. |
| [4] | Luan Y K;Song N N;Bai Y L;Kang X H Li D Z .Effect of solidification rate on the morphology and distribution ofeutectic carbides in centrifugal casting high-speed steel rolls[J].Journal of Materials Processing Technology,2010,210:536. |
| [5] | WANG Mingjia,LI Yanmei,WANG Zixi,BAO Er.Effect of rare earth elements on the thermal cracking resistance of high speed steel rolls[J].稀土学报（英文版）,2011(05):489-493. |
| [6] | Fu H G;Xiao Q;Li Yanxiang .A study of the microstructures and properties of Fe-V-W-Mo alloy modified by rare earth[J].Materials Science and Engineering,2005,395A:281. |
| [7] | Wang Mingjia,Mu Songmei,Sun Feifei,Wang Yan.Influence of Rare Earth Elements on Microstructure and Mechanical Properties of Cast High-Speed Steel Rolls[J].稀土学报（英文版）,2007(04):490-494. |
| [8] | Raju S;Jeya Ganesh B;Banerjee Aritra;Mohandas E .Characterisation of thermal stability and phasc transformation energetics in tempered 9Cr-1Mo steel using drop and differential scanning calorimetry[J].Materials Science and Engineering,2007,397A:29. |
| [9] | Ohno M;Mirkovic D;Schmid-Fetzer R .Phase equilibria and solidification of Mg-rich Mg-Al-Zn alloys[J].Materials Science and Engineering,2006,396A:328. |
| [10] | Yang Q X;Liao B;Cui Z Q;Yao M .Effects of freeing point on RE inclusion as hctcrogeneous nucleation of primary austenite in Fe-C alloys[J].Chinese Journal of Materials Research,1999,13(04):353. |
| [11] | YANG Jun,ZOU De-ning,LI Xiao-ming,DU Zhong-ze.Effect of Rare Earth on Microstructures and Properties of High Speed Steel With High Carbon Content[J].钢铁研究学报（英文版）,2007(01):47-52,59. |
| [12] | Sema M M;Rossi J L .MC complex carbide in AISI M2 high-speed steel[J].Materials Letters,2009,63:691. |
| [13] | Sh. Kheirandish;Sh. Mirdamadi;Y. H. K. Kharrazi .Effect of titanium on cast structure of high speed steel[J].Materials Science and Technology: MST: A publication of the Institute of Metals,1998(4):312-316. |
| [14] | Qu Y H;Xing J D;Zhi X H;Peng J Y Fu H G .Effect of cerium on the as-east microstructure of a hypereutectic high chromium cast iron[J].Materials Letters,2008,62:3024. |
| [15] | Mitsuo HASHIMOTO;Osamu KUBO;Yasuhiro MATSUBARA .Analysis of Carbides in Multi-component White Cast Iron for Hot Rolling Mill Rolls[J].ISIJ International,2004(2):372-380. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%