| 铁道货车转8A铸钢侧架B部位裂纹分析 |
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| 引用本文： | 程里,余家捷.铁道货车转8A铸钢侧架B部位裂纹分析[J].理化检验(物理分册),2008,44(5):261-264. |
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| 作者姓名： | 程里 余家捷 |
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| 作者单位： | 1. 重庆工学院,材料科学与工程学院,重庆,400050
2. 铁道部驻重庆重型铸锻厂,车辆验收室,重庆,400083 |
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| 摘 要： | 在生产铁道货车铸钢转8A侧架时，近30％的侧架B部位产生横向裂纹。采用化学成分分析及裂纹的宏、微观检验等方法对产生横向裂纹的侧架B部位进行了分析，并对其铸造工艺进行了探讨。结果表明侧架B部位产生横向裂纹的主要原因在于防裂拉筋设计不合理，导致铸件凝固时出现热裂纹。并提出了有效的改进措施。
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| 关 键 词： | 铁路车辆 铸钢侧架 横向裂纹 防裂拉筋 |
| 文章编号： | 1001-4012(2008)05-0261-03 |
| 修稿时间： | 2007年4月18日 |
ANALYSIS OF CASTING CRACK IN B OF Z8A SIDE FRAME FOR RAILWAY FREIGHT CARS |
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| CHENG Li,YU Jia-jie.ANALYSIS OF CASTING CRACK IN B OF Z8A SIDE FRAME FOR RAILWAY FREIGHT CARS[J].Physical Testing and Chemical Analysis Part A:Physical Testing,2008,44(5):261-264. |
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| Authors: | CHENG Li YU Jia-jie |
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| Affiliation: | CHENG Li, YU Jia-jie (1. College of Materials Science and Engineering, Chongqing Institute of Technology, Chongqing 400050. China; 2. Vehicle Checking and Accepting Office of R. P. C Railway Ministry at Chongqing Heavy duty Forging and Casting Plant, Chongqing 400083, China) |
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| Abstract: | The Crossing cracks were found in B position of 30% steel-casting side frame at foundry. Analysis was performed on the crack zone by chemical compositions , macroscopic and microscopic testing. The results showed that gear axle failure resulted from hydrogen brittleness and fatigue fracture. Foundry pouring and moulding procedure were casted back, and technics was improved and supervised. The result showed that crossing crack in B position was caused preventing crack tie bar designing mistakenly. And the improved methods were put forward. |
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| Keywords: | Railway freight cars Steel-casting side frame Crossing crack Preventing crack tie bar |
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