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%.

所属栏目

试验研究国家自然科学基金资助项目(50675190)

收稿日期

2008/3/132008/9/18

作者单位

刘喜平:燕山大学机械工程学院, 河北 秦皇岛 066004
张燕玲:燕山大学机械工程学院, 河北 秦皇岛 066004
付宇明:燕山大学机械工程学院, 河北 秦皇岛 066004

备注

刘喜平(1957-),男,山东邹平人,教授,硕士.

引用该论文:

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 mechancial engineering,2009,33(4):32～34
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):32～34

参考文献

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