| 840D货车车轮CL60钢在300℃下的低周疲劳特性 |
| |
| 引用本文： | 宋志坤,谢基龙,李强,郭少中.840D货车车轮CL60钢在300℃下的低周疲劳特性[J].北方交通大学学报,2010(1):120-122,127. |
| |
| 作者姓名： | 宋志坤 谢基龙 李强 郭少中 |
| |
| 作者单位： | [1]北京交通大学机械与电子控制工程学院,北京100044 [2]中国铁路物资总公司,北京100032 |
| |
| 基金项目： | 铁道部科技开发计划项目瓷助（M07D0041） |
| |
| 摘 要： | 以货车车轮CL60钢为研究对象，进行了300℃下的高温低周疲劳实验．研究发现：在循环初期，试样承受的拉压应力幅基本对称；循环末期，拉应力急剧降低，试样产生了失稳断裂；终了时的循环应力。应变曲线反映出了典型的瞬断特征．因此，有必要从断口处进一步研究其微观断裂机理．
|
| 关 键 词： | 货车车轮 CL60钢 低周疲劳 断裂 |
Low Cycle Fatigue Characteristics at 300℃ of CL60 Steel for 840D Freight Wheel |
| |
| SONG Zhikun,XIE Jilong,LI Qiang,GUO Shaozhong.Low Cycle Fatigue Characteristics at 300℃ of CL60 Steel for 840D Freight Wheel[J].Journal of Northern Jiaotong University,2010(1):120-122,127. |
| |
| Authors: | SONG Zhikun XIE Jilong LI Qiang GUO Shaozhong |
| |
| Institution: | 1. School of Mechanical and Electronic Control Engineering, Beijing Jiaotong University, Beijing 100044,China; 2. China Railway Materials Commercial Corp., Beijing 100032, China) |
| |
| Abstract: | Braking spalling, braking thermal cracking and tread abrasion are several main damage forms of freight wheel during operation period, whose principal mechanism is due to thermal damage caused during braking process, which belongs to High-temperature low cycle fatigue （LCF）. In this paper, High-temperature LCF tests of CL60 steel for freight wheel were conducted at 300℃. It was found that the tensile stress and compressive stress amplitudes were symmetrical on the whole during initial stage of cycling, while the tensile stress decreased dramatically during final stage, and collapse rupture occurred in the sample. The final cycling stress-strain curve also reflected typical features of instanta- neous rupture. It is suggested that further research should be done on the fracture surface to find out micro-failure mechanism. |
| |
| Keywords: | freight wheel CL60 steel low cycle fatigue（LCF） rupture |
| 本文献已被 维普 等数据库收录！ |
|
