| 灰铸铁缸套内表面Nd:YAG激光NiTi合金化研究 |
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| 引用本文： | 李凤生,钟敏霖,等.灰铸铁缸套内表面Nd:YAG激光NiTi合金化研究[J].激光技术,2002,26(5):327-329. |
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| 作者姓名： | 李凤生 钟敏霖 |
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| 作者单位： | 1.清华大学机械系激光加工研究中心, 北京, 100084 |
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| 基金项目： | 清华大学 985基金资助项目 |
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| 摘 要： | 采用预置涂层法对灰铸铁缸套内表面进行Nd:YAG激光NiTi合金化研究,可得到表面平整的激光合金化层。该材质的灰铸铁存在较大的裂纹倾向,在适当的涂层厚度、工艺参数和预热条件下,可获得无裂纹合金化区。激光强化层包括合金化区和淬火马氏体区和二者之间很窄的过热区,其硬度较铸铁基体显著提高;微观组织以亚共晶介稳组织为主。
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| 关 键 词： | Nd:YAG激光合金化 NiTi合金 灰铸铁缸套 |
| 文章编号： | 1001-3806(2002)05-0327-03 |
| 收稿时间： | 2001/7/17 |
| 修稿时间： | 2001年7月17日 |
Laser suface alloying of cylinder bore gray cast iron with Ni-Ti by Nd∶YAG laser |
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| Li Fengsheng,Zhong Minlin,Liu Wenjin,Ning Guoqing,Chen Yanxia.Laser suface alloying of cylinder bore gray cast iron with Ni-Ti by Nd∶YAG laser[J].Laser Technology,2002,26(5):327-329. |
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| Authors: | Li Fengsheng Zhong Minlin Liu Wenjin Ning Guoqing Chen Yanxia |
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| Abstract: | Nd:YAG laser alloying Ni-Ti with pre placed coating on specific cylinder bore gray cast iron was investigated and smooth surface alloyed layers were available.This kind of laser alloying cast iron was quite sensitive to cracking.Crack free alloyed layers were possible with appropriate coating thickness,alloying parameters and preheating.The alloyed layer consists of alloyed zone,remelting zone and quenching zone,whose micro hardness is increased dramatically.The main microstructure of the alloyed layer is the hypoeutectic sub-stable structure. |
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| Keywords: | Nd：YAG laser alloying Ni-Ti gray cast-iron cylinder liner |
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