The secondary hardening, the austenite grain coarsening and the surface decarburization phenomenon of Nb-bearing spring steel were investigated, and the effects of niobium on tempered microstructure was studied using scanning electron microscope. The results show that the micro-addition of niobium increases the tempering resistance and produces secondary hardening. The effect of niobium on the size and distribution of cementite particles is one of the primary reasons to increase the hardness after tempering. The grain-coarsening temperature of the spring steel is raised 150 ~C due to Nb-addition. Furthermore, both the secondary hardening and the austenite grain coarsening phenomenon congruously demonstrate niobium begins observably dissolving above 1 100 ℃ in the spring steel. Be- sides, niobium microalloying is an effective and economy means to decrease the decarburization sensitivity of the spring steels.
参考文献
| [1] | A. J. DeArdo .Niobium in modern steels[J].International Materials Reviews,2003(6):371-402. |
| [2] | Morrison W B .Microalloying Steels--the Beginning[J].Materials Science and Technology,2009,25(04):1066. |
| [3] | Oliveira M;Jansto S;Mohrbacher H.Thirty Years of Niobium Steel Development in China[A].Beijing:CITIC-CBMM Microalloying Technology Center Press,2009:119. |
| [4] | Matlock D K;Speer J G .Microalloying Concepts and Applica tions in Long Products[J].Materials Science and Technology,2009,25(09):1118. |
| [5] | 付俊岩.汽车零部件用高品质特殊钢技术的最新发展[J].汽车工程,2009(05):407-413. |
| [6] | I. Olivares;M. Alanis;R. Mendoza .Development of microalloyed steel for pipeline applications[J].Ironmaking & Steelmaking,2008(6):452-457. |
| [7] | Ci DING,Weixin HAN.Secondary hardening behavior of 15CrMnMoV thin rolled tube[J].金属学报（英文版）,2010(04):261-266. |
| [8] | El Fawakhry K A;Mishreky M L;Eissa M M .Secondary Hardening of Vanadium and Titanium Microalloyed Steels[J].Scandinavian Journal of Metallurgy,1990,19:33. |
| [9] | 张志波,刘清友,张晓兵,孙新军.加热温度对管线钢奥氏体晶粒尺寸和铌固溶的影响[J].钢铁研究学报,2008(10):36-39. |
| [10] | Flores O.;Martinez L. .ABNORMAL GRAIN GROWTH OF AUSTENITE IN A V-NB MICROALLOYED STEEL[J].Journal of Materials Science,1997(22):5985-5991. |
| [11] | Pennington W A .A Mechanism of the Surface Decarburization of Steel[J].Transaction of American Society of Metals,1946,37:48. |
| [12] | Li D;Anghelina D;Burzic D et al.Investigation of Decar- burization in Spring Steel Production Process Part h Experi- ments[J].Steel Research International,2009,80(04):298. |
| [13] | Y. Prawoto;M. Ikeda;S. K. Manville .Design and failure modes of automotive suspension springs[J].Engineering failure analysis,2008(8):1155-1174. |
| [14] | 石如星,姚春发,惠卫军,雍歧龙,聂义宏,项金钟.Si对中碳弹簧钢氧化脱碳行为的影响[J].特殊钢,2008(03):19-20. |
| [15] | NIE Yi-hong;FU Shu-hong;HUI Wei jun et al.Effect of Boron on Deearburization Sensitivity of High Strength Spring Steel[J].Journal of Iron and Steel Research,2005,17(04):45. |
| [16] | MA Ming-tu;LI Zhi-gang;LU Xiang-yang .Effect of Vanad- ium on Decarhurization Sensitivity of Spring Steel 35SiMnB[J].Special Steel,2001,22(05):9. |
| [17] | Toshiro Y;Ryohei K;Mamoru K et al.Spring Steel Having a Good Sag-resistance and a Good Hardenability[P].US Patent US4544406,1985-10-01. |
| [18] | Yamamoto T;Kobayashi R;Ozone T et al.Precipitation- Strengthened Spring Steel for Automotive Suspensions[J].Jour- nal Heat Treating,1984,3(03):220. |
| [19] | Fernandez J;Illescas S;Guilemany J M .Effect of Microallo- ying Elements on the Austenitic Grain Growth in a Low Car- bon HSLA Steel[J].Materials Letters,2007(61):2389. |
| [20] | Palmiere E J;Garcia C I;DeArdo A J .Compositional and Mi- crostruetural Changes Which Attend Reheating and Grain Coarsening in Steels Containing Niobium[J].Metallurgical and Materials Transactions A:Physical Metallurgy and Materials Science,1994,25(02):277. |
| [21] | CUI Juan,LIU Ya-zheng,PAN Hui,GAO Li-feng.Reheating Austenitizing Temperature of Spring Steel 60Si2MnA for Railway[J].钢铁研究学报(英文版),2008(06):62-67. |
| [22] | Lakshmanan V K;Kirkaldy J S .Solubility Product for Niob ium Carbide in Austenite[J].Metallurgical and Materials Transactions A:Physical Metallurgy and Materials Science,1984,15:541. |
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