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少量添加稀土元素Nd和Er對擠壓態(tài)Mg-6.0Zn-0.5Mn鎂合金干摩擦磨損性能的影響
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1.青島理工大學(xué)機械與汽車工程學(xué)院;2.重慶大學(xué)材料科學(xué)與工程學(xué)院

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山東省重點研發(fā)計劃(公益類科技攻關(guān))(2019GGX102060)


The Effects of Minor Addition of Nd and Er Elements on Dry Sliding Friction and Wear Characteristics of extruded Mg-6.0Zn-0.5Mn alloy
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College of Mechanical Engineering,Qingdao Technological University

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    摘要:

    利用掃描電子顯微鏡、能譜儀、透射電鏡、硬度計、3D輪廓儀和UMT-3型摩擦磨損試驗機研究了復(fù)合添加微量Nd和Er元素對Mg-6.0Zn-0.5Mn干摩擦磨損性能的影響。結(jié)果表明，添加微量Nd和Er元素后，晶界處種類和數(shù)量更多的金屬間化合物會阻礙晶界的遷移和滑移，基體中動態(tài)析出的β_1^"相密度增大且平均長度減小，更多的動態(tài)析出相以及彌散分布的金屬間化合物提高了使基體的硬度，降低了磨損量。Mg-6.0Zn-0.5Mn合金在5N低載荷下的磨損機制以磨粒磨損為主，并伴有氧化磨損；當(dāng)載荷增大至20N，磨粒磨損明顯減弱，氧化磨損程度增大。復(fù)合添加微量Nd和Er后，Mg-6.0Zn-0.5Mn-0.6Nd-0.3Er合金在低載荷下（5N）的磨損機制以磨粒磨損為主，伴有氧化磨損和黏附磨損；由于耐磨性提高，當(dāng)載荷增大至20N，磨損機制仍以磨粒磨損為主，黏附磨損程度有所減弱，并伴有氧化磨損。

    Abstract:

    The effects of Nd and Er elements on the friction and wear behavior of Mg-6.0Zn-0.5Mn alloy were studied. More types and quantities of intermetallic compounds can hinder the migration and slip of the grain boundary, and the volume fraction of dynamic precipitates β_1^" with a smaller average length increased, which increases the hardness of the matrix and leads to reduce the wear rate of Mg-6.0Zn-0.5Mn-0.6Nd-0.3Er alloy. The wear mechanism of Mg-6.0Zn-0.5Mn alloy under a lower load of 5N is mainly abrasive wear, accompanied by oxidative wear; when the load increased to 20N, abrasive wear is weakened obviously and oxidative wear increases in Mg-6.0Zn-0.5Mn alloy. The wear mechanism of Mg-6.0Zn-0.5Mn-0.6Nd-0.3Er alloy under 5N is mainly abrasive wear, accompanied by oxidative wear and adhesion wear; due to the improved wear resistance, when the load increases to 20N, the wear mechanism of Mg-6.0Zn-0.5Mn-0.6Nd-0.3Er alloy is still mainly abrasive wear, accompanied by oxidative wear and weakened adhesion wear.

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引用本文

呂濱江,王森,郭峰,彭建.少量添加稀土元素Nd和Er對擠壓態(tài)Mg-6.0Zn-0.5Mn鎂合金干摩擦磨損性能的影響[J].稀有金屬材料與工程,2021,50(12):4516~4524.[Bin-Jiang Lv, Sen Wang, Feng Guo, Jian Peng. The Effects of Minor Addition of Nd and Er Elements on Dry Sliding Friction and Wear Characteristics of extruded Mg-6.0Zn-0.5Mn alloy[J]. Rare Metal Materials and Engineering,2021,50(12):4516~4524.]
DOI：10.12442/j. issn.1002-185X.20200975

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  • 收稿日期:2020-12-17
  • 最后修改日期:2021-01-18
  • 錄用日期:2021-02-04
  • 在線發(fā)布日期: 2022-01-09
  • 出版日期: 2021-12-24