| 在役45钢构件半埋藏裂纹的电磁热止裂 |
| |
| 引用本文： | 刘喜平,张燕玲,付宇明.在役45钢构件半埋藏裂纹的电磁热止裂[J].机械工程材料,2009,33(4). |
| |
| 作者姓名： | 刘喜平 张燕玲 付宇明 |
| |
| 作者单位： | 燕山大学机械工程学院,河北秦皇岛,066004
|
| |
| 摘 要： | 应用自制的ZL-2超强脉冲电流发生装置,对带有半埋藏裂纹的45钢拉伸试样进行了拉伸载荷作用下的脉冲放电电磁热止裂;对止裂前后的拉伸试样通过微机控制电子万能试验机进行了三点弯曲试验,并对止裂前后裂尖附近的显微组织进行了对比分析.结果表明:电磁热止裂后,裂纹尖端瞬时熔化、钝化,达到了裂纹止裂的目的;在裂纹尖端附近的组织出现了细化,电磁热止裂后试样所能承受的最大弯曲力和抗弯强度分别较止裂前提高了约23%和25%.
|
| 关 键 词： | 脉冲放电 裂纹止裂 弯曲性能 |
Crack Arrest of Half-embedding Cracks of In-service 45 Steel Component by Electromagnetic Heating |
| |
| LIU Xi-ping,ZHANG Yan-ling,FU Yu-ming.Crack Arrest of Half-embedding Cracks of In-service 45 Steel Component by Electromagnetic Heating[J].Materials For Mechanical Engineering,2009,33(4). |
| |
| Authors: | LIU Xi-ping ZHANG Yan-ling FU Yu-ming |
| |
| Affiliation: | Yanshan University;Qinhuangdao 066004;China |
| |
| Abstract: | 45 steel tensile specimens with half-embedding cracks were used to perform pulse discharge crack arrest experiment using a self-made ZL-2 super pulse current generation device.The three-point bending test was carried on the tensile specimens before and after the crack arrest using a computer control electronic universal testing machine.The microstructure near the crack tip was analyzed.The results show that the crack tip was instantly melt and dulled after pulse current discharge,resulting in crack arrest.T... |
| |
| Keywords: | pulse current discharge crack arrest bend property |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
