用高密度脉冲电流对服役后期的高锰钢辙叉进行表面处理,研究了对其组织结构的影响。结果表明,在较低的温度下（786 K）辙叉发生再结晶,再结晶晶粒尺寸约为29.3μm,远比处理前的晶粒尺寸小,处理后的显微硬度显著降低。在高密度脉冲电流作用下,位错运动能力、原子的扩散能力以及振动频率都提高了,从而使再结晶的形核速率显著提高,使辙叉在较低的温度下快速完成再结晶。处理后高锰钢的疲劳寿命显著提高。
A kind of high current density electropulsing treatment was carried out on the surface of later-serviced high manganese steel crossing.The results show that specimen finished recrystallization at a relatively low temperature of 786K,the recrystallization grain size of～29.3μm was much finer than that of the specimen before treatment,and the microhardness decreased remarkably after treatment by high current density electropulsing.Electropulsing enhanced the recrystallization nucleation rate of the specimen which resulted in recrystallization being finished at low temperature rapidly.Enhancement of the nucleation rate mainly resulted from the increase in mobility of dislocation、diffusion ability of atoms and the frequency of the atoms.The fatigue life of high manganese steel was improved notably after treatment by high current density electropulsing.
参考文献
| [1] | 张福成, 吕博, 郑春雷, 张明, 杨帅, 闫志刚. 高锰钢和贝氏体钢辙叉失效机理及其磨面组织, 机械工程学报, 44(12), 232(2008). |
| [2] | 张福成. 高锰钢辙叉材料研究进展, 燕山大学学报, 34(3), 189(2010). |
| [3] | F.C.Zhang, B.Lv, T.S.Wang, C.L.Zheng, M.Zhang, H.H.Luo, H.L, Microstructure and properties of purity high Mn steel crossing explosion hardened, ISIJ Int., 48(12), 1776(2008). |
| [4] | 张福成, 吕博, 刘辉, 徐安友. 高锰钢辙叉表面爆炸硬化工艺, 中国专利, 10061422(2007). |
| [5] | 肇斌, 胡光立, 陈彦.热处理工艺和爆炸预硬化对高锰钢ZGMn13VTiMoRE组织和耐磨性的影响, 钢铁, 32(9), 45(1997). |
| [6] | 张敏, 王为波, 安强, 周永欣, 吕振林. 高锰钢铁路辙叉表面龟裂剥落机理分析, 机械工程材料, 29(9), 64(2005). |
| [7] | O.V.Sosnin, A.V.Gromava, Y.F.Ivanov, S.V.Konovalov, V.E.Gromov, E.V.Kozlov, Control of austenite steel fatigue strength, Int. J. Fatigue, 27, 1186(2005). |
| [8] | H.Conrad, J.White, W.D.Cao, X.P.Lu, A.F.Sprecher, Effect of electric current pulses on fatigue characteristics of polycrystalline copper, Mater. Sci. Eng. A, 145A, 1(1991). |
| [9] | H.Conrad, Effects of electric on solid phase transformation in metals,Mater. Sci. Eng. A, A287, 227(2000). |
| [10] | A.F.Sprecher, S.L.Mannan, H. Conrad, On the mechanisms for the electroplastic effect in metals, Acta Metall., 34(7), 1145(1986). |
| [11] | S.H.Xiao, J.D.Guo, S.D.Wu, G.H.He, S.X.Li, Recrystallization in fatigued copper single crystal under electropulsing, Scripta Meter., 46, 1(1992). |
| [12] | 周亦胄, 肖素红, 郭敬东, 何冠虎. 脉冲电流对冷加工黄铜的组织及性能的影响, 材料研究学报, 16(4), 375(2002). |
| [13] | 吕宝臣, 周亦胄, 王宝全, 郭敬东. 脉冲电流对疲劳后30CrMnSiA钢组织结构的影响, 材料研究学报, 17(1), 15(2003). |
| [14] | 沈以赴, 周本濂, 何冠虎, 姚戈, 鄢红春.材料疲劳恢复新途径的探索I-低碳钢疲劳寿命的延长, 材料研究学报, 10(2), 165(1996). |
| [15] | J.P.Barnak, A.F.Sprecher, H.Conrad, Colony(grain) size reduction in eutectic Pb–Sn castings by electroplusing, Scripta Metall., 32(6), 879(1995). |
| [16] | 颜礼功, 李增, 周晓玲. 脉冲电流改善G20CrNiMoA轴承钢基体组织的应用研究, 金属热处理, 112(2006). |
| [17] | Anon, Repair or fabrication of austenitic manganese steel rail components, Welding J., 85(1), 48(2006). |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%