| 脉冲电流作用下碳钢淬火裂纹的愈合 |
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| 引用本文： | 周亦胄,肖素红,甘阳,高明,何冠虎,周本濂. 脉冲电流作用下碳钢淬火裂纹的愈合[J]. 金属学报, 2000, 36(1): 43-45 |
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| 作者姓名： | 周亦胄 肖素红 甘阳 高明 何冠虎 周本濂 |
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| 作者单位： | 1. 中国科学院金属研究所,沈阳,110015
2. 中国科学院金属研究所,沈阳,110015;中国科学院国际材料物理中心,沈阳,110015 |
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| 基金项目： | 国家自然科学基金重点资助项目59889101 |
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| 摘 要： | 对有淬火裂纹的４５钢试样进行脉冲电流处理，通过ＳＥＭ观察处理前后试样的。结果表明，在脉冲电流作用下，裂纹能够在无熔化的情况下出现愈合，且愈合是极短时间内发生的。愈合过程不改变材料的原有结构。快速温升引起的瞬时热压应力可能是造成裂纹愈合的重要因素之一。
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| 关 键 词： | 脉冲电流 裂纹愈合 热压应力 淬火裂纹 碳钢 |
| 文章编号： | 0412-1961(2000)01-0043-03 |
| 修稿时间： | 1999-06-11 |
THE HEALING OF QUENCHED CRACK IN CARBON STEEL UNDER ELECTROPULSING |
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| ZHOU Yizhou,XIAO Suhong,GAN Yang,GAO Ming,HE Guanhu,ZHOU Benlian. THE HEALING OF QUENCHED CRACK IN CARBON STEEL UNDER ELECTROPULSING[J]. Acta Metallurgica Sinica, 2000, 36(1): 43-45 |
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| Authors: | ZHOU Yizhou XIAO Suhong GAN Yang GAO Ming HE Guanhu ZHOU Benlian |
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| Abstract: | The specimens of 45 steel with the quenched crack were treated under electropulsing, SEM was employed to examine the change of specimens before and after the treatment. The results show that the crack can be healed under electropulsing without melting, and the healing of crack can be produced within very short time. The original microstructure of specimens is not changed during the healing. It is thought that the transient thermal compressive stress caused by high--rate heating is an important factor causing the healing of crack. |
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| Keywords: | electropulsing healing of crack thermal compressive stress quenched crack |
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