| 电磁热效应对T7钢的裂纹止裂 |
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| 引用本文： | 乔桂英,白象忠.电磁热效应对T7钢的裂纹止裂[J].热加工工艺,2000(2):11-13. |
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| 作者姓名： | 乔桂英 白象忠 |
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| 作者单位： | 燕山大学材料科学与化学工程学院!河北秦皇岛066004 |
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| 基金项目： | 国家自然科学基金! ( 1 9772 0 4 6)，河北省自然科学基金!( 5992 55)资助项目 |
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| 摘 要： | 利用电磁热效应原理，在自制的ＺＬ０－１型超强度脉冲电流以发生装置上，对Ｔ７钢的纹止裂效果进行了初步研究。表明：对试件实施放电瞬间，在裂纹尖端处形成焊口使裂纹尖端的同蓄半径增大，达到抑制裂纹扩展的目的。同时：对裂纹尖端热影响区的组织进行了分析，并讨论了因快速加热和冷却作用所获得细小淬火马氏体组织及热压应力和相变压应力对止效果的影响。
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| 关 键 词： | 电磁热效应 裂纹 止裂 钢 |
| 修稿时间： | 1999-12-22 |
Crack Preventing by the Elcetromagnetic Heat Effect on Crak in Steel T7 |
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| QIAO Gui ying,BAI Xiang zhong,LUAN Jin yu,XIAO Fu hong.Crack Preventing by the Elcetromagnetic Heat Effect on Crak in Steel T7[J].Hot Working Technology,2000(2):11-13. |
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| Authors: | QIAO Gui ying BAI Xiang zhong LUAN Jin yu XIAO Fu hong |
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| Abstract: | By using theory of electromagnetic heat effect,the effect on crack preventing for steel T7 was studied on instrument of super intention pulses electric current generator.The results show that a small welded joint can be formed at a small sphere near the top of the crack by smelting as the result of heat concentration effect,when the time electromagnetic is applied.This result can be used to crack preventing.At same time,the microstructure of the front top of the crack was studied.The influence of fine martensite and the hot stress and phase stress because of high heat and cooling rate on effect of crack preventing was discussed,too. |
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| Keywords: | electromagnetic heat effect crack crack preventing |
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