| 低碳钢表面激光熔覆层与热喷涂层组织与性能对比 |
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| 引用本文： | 冯旭东,袁庆龙,曹晶晶,苏志俊.低碳钢表面激光熔覆层与热喷涂层组织与性能对比[J].表面技术,2010,39(2):19-20,27. |
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| 作者姓名： | 冯旭东 袁庆龙 曹晶晶 苏志俊 |
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| 作者单位： | 河南理工大学,焦作,454000;河南理工大学,焦作,454000;河南理工大学,焦作,454000;河南理工大学,焦作,454000 |
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| 摘 要： | 利用CO2激光器在Q235低碳钢表面激光熔覆了Ni25合金涂层。用扫描电镜、显微硬度计对熔覆层的微观组织、显微硬度进行了测定与分析。结果表明：激光熔覆层质量良好，基本无裂纹、气孔等缺陷，覆层中存在着大量的树枝晶，与基体之间为冶金结合，结合强度高；而热喷涂层质量不好，存在明显的孔洞和间隙，与基体之间为机械结合，结合力微弱；经过激光重熔之后覆层的硬度明显高于喷涂层的硬度，且2种覆层的硬度均比基体的硬度要高。
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| 关 键 词： | 激光熔覆 热喷涂 显微组织 |
| 收稿时间： | 2009/11/10 0:00:00 |
| 修稿时间： | 2010/4/10 0:00:00 |
Research on the Microstructure and Properties of Laser Cladding Layer and Thermal Spray Coating on the Surface of Soft Steel |
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| FENG Xu-dong,YUAN Qing-long,CAO Jing-jing and SU Zhi-jun.Research on the Microstructure and Properties of Laser Cladding Layer and Thermal Spray Coating on the Surface of Soft Steel[J].Surface Technology,2010,39(2):19-20,27. |
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| Authors: | FENG Xu-dong YUAN Qing-long CAO Jing-jing and SU Zhi-jun |
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| Affiliation: | FENG Xu-dong,YUAN Qing-long,CAO Jing-jing,SU Zhi-jun(Henan Polytechnic University,Jiaozuo 454000,China) |
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| Abstract: | Ni25 alloy coatings have been prepared by a CO2 laser on the soft steel(Q235)surface.Cross-section microstructure characteristics of the coating were studied by scanning electronic microscope and micro-hardness analysis.The results show that laser cladding layers,which have no defects of cracks and holes,contain a large number of dendrites.That is metallurgical bonding between the cladding layer and the substrate,which makes high bonding strength.But thermal spray coatings exist obvious holes and gaps.The c... |
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| Keywords: | Laser cladding Thermal spray Microstructure |
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