The microsturctural transformation of austenite grain,pearlite interlamellar spacing,and lamellar cementite thickness of spring steel 60Si2MnA for railway were studied in the hot-rolled and reheated states.Furthermore,the effect of microstructural characterization on its final mechanical properties was discussed.The results showed that as far as 60Si2MnA,the pearlite interlamellar spacing determined the hardness,whereas,the austenite grain determined the toughness.Compared with microstructure and mechanical properties in the hot-rolled state,after reheating treatment at 950℃,its average grain sizes are apparently fine and the pearlite interlamellar spacing and lamellar cementite thickness coarsen to some extent,but both hardness and impact toughness increase to HRC 48 and 8.5 J.respectively.In the course of making spring,the optimum reheating austenitizing temperature for the 60Si2MnA steel is 950℃.
参考文献
| [1] | YANG Zhi-an;WANG Zhi-rui .Effect of Prestrain on Cyclic Creep Behaviour of a High Strength Spring Steel[J].Material Science and Engineering,1996,210A(01):83. |
| [2] | Nam W.J.;Choi H.C. .High strength steel wire rod for suspension coil spring[J].Wire Journal International,1996(5):94-97. |
| [3] | Kotaro W;Masashi T;Ken Y et al.Development of a New-Type Suspension Spring for Rally Cars[J].Journal of Materials Processing Technology,2001,111(1-3):132. |
| [4] | Won J N;Chong S L;Deok Y B .Effects of Alloy Additions and Tempering Temperature on the Sag Resistance of Si-Cr Spring Steels[J].Material Science and Engineering,2000,289A(1-2):8. |
| [5] | Fernandez-Vicente A.;Carsi M.;Penalba F.;Taleff E.;Ruano OA. .Toughness dependence on the microstructural parameters for an ultrahigh carbon steel (1.3 wt.% C)[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2002(1/2):175-185. |
| [6] | WANG Yi-nong;JIA Huai-yuan;SHI Ying-chuen et al.The Austenite Grain Coarsening Behavior of 50CrVA Steel[J].Journal of Jiamusi Institute of Technology,1994,12(03):131. |
| [7] | WANG You-ming;LI Man-yun;WEI Guang.Controlled Rolling and Controlled Cooling of Steel[M].北京:冶金工业出版社,1995 |
| [8] | Modi O P;Deshmukh N;Mondal D P et al.Effect of Interlamellar Spacing on the Mechanical Properties of 0.65%C Steel[J].Materials Characterization,2001,46(05):347. |
| [9] | Peng X.;Fan J.;Yang Y. .A micro structure-based description for cyclic plasticity of pearlitic steel with experimental verification[J].International Journal of Solids and Structures,2002(2):419-434. |
| [10] | V.G. Gavriljuk .Comment on "Effect of interlamellar spacing on cementite dissolution during wire drawing of pearlitic steel wires"[J].Scripta materialia,2001(12):1469-1472. |
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