| 超前扩展点的诱导 |
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| 引用本文： | 张克俭,王水,郝学志.超前扩展点的诱导[J].热处理技术与装备,2007,28(4):14-18. |
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| 作者姓名： | 张克俭 王水 郝学志 |
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| 作者单位： | 北京华立精细化工公司,北京,昌平,102200 |
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| 摘 要： | 用人为的方法,在表面温度高于T1时产生超前扩展点的做法叫做超前扩展点的诱导.用液态介质中冷却的四阶段理论分析指出:通过诱导产生超前扩展点可以克服自然超前扩展点的随机性,可以提高工件获得的冷却速度,还可以减小工件上的冷却速度差异.提出了两种诱导超前扩展点的方法:诱导锥法和冲液法.用实际的诱导试验演示了这两种方法的诱导效果.超前扩展点的诱导将成为精细淬火冷却技术中的一项基本方法.
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| 关 键 词： | 热处理 淬火冷却 液态淬火介质 精细淬火冷却技术 |
| 文章编号： | 1673-4971（2007）04-0014-05 |
| 修稿时间： | 2007-06-21 |
Induction of the Hyper-spreading Spot |
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| ZHANG Ke-jian,WANG Shui,HAO Xue-zhi.Induction of the Hyper-spreading Spot[J].Heat Treatment Technology and Equipment,2007,28(4):14-18. |
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| Authors: | ZHANG Ke-jian WANG Shui HAO Xue-zhi |
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| Affiliation: | Beijing Huali Fine Chemical Co. , Beijing 102200 ,China |
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| Abstract: | By using manual methods,hyper-spreading spots can be produced while the surface temperature is higher than T1,this is termed induction of a hyper-spreading spot.Using the four-stage differentiation theory of quenching in liquids,the following analyses can be made: producing hyper-spreading spots by induction can eliminate the problem of randomness in natural occurrence of hyper-spreading spots;can increase the cooling rate of the work piece;and reduce the differences in cooling rates within a work piece.Two kinds of hyper-spreading spot induction methods have been offered: induction by cone and jet stream induction.Experiments have shown the effectiveness of the two induction methods.Induction of hyper-spreading spots can become a basic process method within the fine quenching technique. |
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| Keywords: | heat-treatment quenching liquid quenchants fine quenching technique |
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