利用MMS-2A型微机控制摩擦磨损试验机研究了激光表面淬火对重载轮轨磨损与损伤性能的影响,分析了激光淬火对重载轮轨表面损伤的作用机理.结果表明：激光淬火处理后轮轨试样存在一定厚度的淬火处理层,其组织主要为均匀致密的马氏体层;激光淬火可明显提高车轮和钢轨试样的表面硬度,其硬度分别增加35.7%、33.5%;激光淬火基本不改变轮轨试样的滚动摩擦系数;激光淬火可增强轮轨试样的耐磨性,相比淬火前车轮和钢轨试样磨损量分别降低62.9%和66.0%;未处理轮轨试样表面损伤主要表现为明显的剥落损伤,激光淬火后轮轨表面损伤相对轻微,主要表现为小麻点式剥落损伤,重载工况下激光淬火处理使轮轨试样具有较好的抗表面损伤能力.
The effect of laser quenching on wear and damage behaviors of heavy-haul wheel/rail steels was investigated in detail using a MMS-2A testing apparatus.Furthermore,the damage mechanism of heavy-haul wheel/rail specimens was analyzed under laser quenching condition.The results indicate that the wheel/rail specimens form a quenched layer,which is compact martensite layer.Laser quenching can increase the surface hardness of wheel and rail specimens and the increase rate is about 35.7% and 33.5%,respectively.The laser quenching has no obvious effect on rolling friction coefficient of wheel/rail specimens.Laser quenching increase wear resistance of wheel/rail steels.Therefore,the wear volume of heavy-haul wheel/rail specimens would have an obvious fall and the decrease rate of wheel/rail specimens is about 62.9% and 66.0%,respectively.Obvious spalling damage of wheel/rail specimens is serious when the specimens are not treated.The surface damage of laser quenched wheel/rail specimens is relatively slight.The small pitting spalling damage is dominant after laser quenching of wheel/rail specimens.Laser quenched wheel/rail specimens have good surface damage resistance under the heavy-haul condition.
参考文献
| [1] | 候玉碧.重载铁路钢轨伤损形成分析及对策[J].铁道建筑技术,2007(z2):26-30,34. |
| [2] | 刘启跃,张波,周仲荣.铁路钢轨损伤机理研究[J].中国机械工程,2002(18):1596-1599. |
| [3] | 刘启跃,王文健,周仲荣.高速与重载铁路钢轨损伤及预防技术差异研究[J].润滑与密封,2007(11):11-14,68. |
| [4] | 周清跃,张建峰,郭战伟,习年生,高新平.重载铁路钢轨的伤损72预防对策研究[J].中国铁道科学,2010(01):27-31. |
| [5] | Francisco C. Robles Hernandez;Nicholaos G. Demas;Dave D. Davis;Andreas A. Polycarpou;Luis Maal .Mechanical properties and wear performance of premium rail steels[J].Wear: an International Journal on the Science and Technology of Friction, Lubrication and Wear,2007(1/6):766-772. |
| [6] | 张银花,周清跃,陈朝阳,刘丰收.重载铁路高强钢轨的试验研究[J].中国铁道科学,2010(04):20-26. |
| [7] | 孔德军,华同曙,丁建宁,袁宁一,陈菊芳.激光淬火处理对灰铸铁残余应力与耐磨性能的影响[J].润滑与密封,2009(04):51-54. |
| [8] | 苏辉,马冰,依颖辉,张立君.42CrMo钢激光淬火组织和硬度的研究[J].兵器材料科学与工程,2011(02):84-86. |
| [9] | 王文健,郭俊,刘启跃.接触应力对轮轨材料滚动摩擦磨损性能影响[J].摩擦学学报,2011(04):352-356. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%