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材料工程  2016, Vol. 44 Issue (9): 115-120    DOI: 10.11868/j.issn.1001-4381.2016.09.018
  测试与表征 本期目录 | 过刊浏览 | 高级检索 |
热处理非晶态Ni-P合金镀层的晶化过程
金世伟1, 康敏1,2, 邵越1, 杜晓霞1, 张欣颖1
1 南京农业大学 工学院, 南京 210031;
2 南京农业大学 江苏省智能化农业装备重点实验室, 南京 210031
Crystallization Process of Heat-treated Amorphous Ni-P Alloy Coating
JIN Shi-wei1, KANG Min1,2, SHAO Yue1, DU Xiao-xia1, ZHANG Xin-ying1
1 College of Engineering, Nanjing Agricultural University, Nanjing 210031, China;
2 Key Laboratory of Intelligent Agricultural Equipment in Jiangsu Province, Nanjing Agricultural University, Nanjing 210031, China
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摘要 运用电沉积的方法在45钢基体上制备Ni-P合金镀层,使用差示扫描量热法(DSC)和热重法(TG)分析非晶态Ni-P合金镀层在20℃/min加热速率下的热效应和质量变化。在300℃和400℃分别对镀层进行0,15,30,45,60,75min的热处理,采用扫描电镜(SEM)、能谱仪(EDS)、X射线衍射仪(XRD)、显微硬度计对镀层进行表征。结果表明:Ni-P合金镀层在加热过程中的放热峰出现在284.8℃处,镀层的质量和元素组成稳定;晶化过程经历了非晶态、亚稳态NiP和Ni5P2、稳定态Ni3P的转变;经过热处理后,镀层的显微硬度显著提高,最大值达1036.56HV,约为镀态的2倍;热处理态镀层的耐NaCl溶液腐蚀性能比镀态有所下降,但两者都比45钢基体好。
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金世伟
康敏
邵越
杜晓霞
张欣颖
关键词 Ni-P合金镀层电沉积晶化显微硬度    
Abstract:Amorphous Ni-P alloy coatings were prepared on 45 carbon steel blocks using electrodeposition method. The thermal effect and quality change of Ni-P alloy coating under heating rate of 20℃/min were analyzed by differential scanning calorimetry (DSC) and thermogravimetry (TG). Coatings were heat-treated at 300℃ and 400℃ for 0, 15, 30, 45, 60, 75min respectively, coating surface was characterized by scanning electron microscope (SEM), energy dispersive spectrometer (EDS), X-ray diffraction (XRD), microhardness tester. The result shows that the exothermic peak of Ni-P alloy coating appears at 284.8℃, coating quality and elemental composition are stable during the heat treatment. Crystallization process experiences a transformation of amorphous, metastable state NiP and Ni5P2, stable state Ni3P. The microhardness of coating can be improved remarkably after heat treatment, namely, the maximum value of heat-treated coating is 1036.56HV, which is nearly 2 times as hard as as-deposited coating. The corrosion resistance of heat-treated Ni-P alloy coating in NaCl solution is inferior to as-deposited coating, but they are both much better than 45 carbon steel substrate.
Key wordsNi-P alloy coating    electrodeposition    crystallization    microhardness
收稿日期: 2014-10-15      出版日期: 2016-09-27
中图分类号:  TG166.7  
  TG174.44  
通讯作者: 康敏(1965-),男,博士,教授,主要从事特种加工、表面改性等方面的研究,联系地址:江苏省南京市浦口区点将台路40号南京农业大学工学院机械工程系(210031),E-mail:kangmin@njau.edu.cn     E-mail: kangmin@njau.edu.cn
引用本文:   
金世伟, 康敏, 邵越, 杜晓霞, 张欣颖. 热处理非晶态Ni-P合金镀层的晶化过程[J]. 材料工程, 2016, 44(9): 115-120.
JIN Shi-wei, KANG Min, SHAO Yue, DU Xiao-xia, ZHANG Xin-ying. Crystallization Process of Heat-treated Amorphous Ni-P Alloy Coating. Journal of Materials Engineering, 2016, 44(9): 115-120.
链接本文:  
http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2016.09.018      或      http://jme.biam.ac.cn/CN/Y2016/V44/I9/115
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