等離子熔覆Fe-Ni基合金導輥組織結構及失效分析

張麗民; 劉均波; 孫冬柏; 王書明

doi:10.13374/j.issn1001-053x.2010.06.014

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等離子熔覆Fe-Ni基合金導輥組織結構及失效分析

doi: 10.13374/j.issn1001-053x.2010.06.014

1. 北京有色金屬研究總院國家有色金屬及電子材料分析測試中心, 北京 100088;
2. 濰坊學院機電工程學院, 濰坊 261061;
3. 北京科技大學腐蝕與防護中心, 北京 100083

詳細信息

作者簡介:
張麗民(1979-),女,工程師,博士,E-mail:zhangliminzlm@163.com

中圖分類號: TG174.442
計量
- 文章訪問數: 118
- HTML全文瀏覽量: 28
- PDF下載量: 6
- 被引次數: 0
出版歷程
- 收稿日期: 2009-09-21

Microstructure and failure analysis of Fe-Ni based alloy rollers produced by plasma cladding

1. National Center of Analysis and Testing for Non-ferrous Metals&Electronic Materials, General Research Institute for Nonferrous Metals, Beijing 100088, China;
2. College of Mechanical and Electrical, Weifang University, Weifang 261061, China;
3. Corrosion and Protection Center, University of Science and Technology Beijing, Beijing 100083, China

摘要

摘要: 采用等離子熔覆技術將Fe-Ni基高溫耐磨合金粉末熔覆到45^#圓鋼上,制備了Fe-Ni基合金導輥.采用掃描電子顯微鏡、能譜儀、X射線衍射儀研究了Fe-Ni基合金涂層的組織結構和Fe-Ni基合金導輥的表面失效情況.結果表明:Fe-Ni基高溫耐磨涂層組織形態良好,由涂層與基體的結合界面處到涂層的上部其組織由平面晶向樹枝晶轉變;γ-(Fe,Ni)的含量在涂層中按底部—中部—上部的方向依次降低,而(Cr,Fe)₇C₃的分布正好相反;Fe-Ni基合金導輥的失效機制為熱疲勞開裂和磨粒磨損.
- Fe-Ni基合金 /
- 導輥 /
- 等離子熔覆 /
- 組織結構 /
- 失效
Abstract: Fe-Ni based high temperature wear-resistant powder was cladded on 45^# round steel to obtain an Fe-Ni based alloy roller by plasma cladding.Scanning electric microscope,energy spectrometer and X-ray diffractometer were adopted to study the microstructure of the Fe-Ni based alloy coating and the failure surface of the Fe-Ni based alloy roller.It is shown that the morphology of the Fe-Ni based high-temperature wear-resistant coating is well and the morphology is planar crystal at the coating-substrate bonding,while the morphology becomes dendrite at the middle and the top of the coating.The γ-(Fe,Ni) content reduces following the bottom-middle-top order in the coating,but the (Cr,Fe)₇C₃ is just the opposite.The failure mechanism of the Fe-Ni based alloy roller is thermal fatigue cracking and grain wear.
- Fe-Ni based alloy /
- roller /
- plasma cladding /
- microstructure /
- failure