3C2;Ni;X射線光電子能譜"/> 3C2粉為原料,采用粉末冶金方法制備了三組不同粘結(jié)相成分的WC-Co-(Ni)-(Cr)硬質(zhì)合金,通過極化曲線測試和浸泡實驗研究了三組合金在中性溶液中的腐蝕行為,并采用掃描電鏡、能譜分析、X射線光電子能譜(XPS)和EBSD等手段對其腐蝕機理進行了探討。結(jié)果表明,WC-Co和WC-Co-Cr硬質(zhì)合金在中性溶液中主要發(fā)生粘結(jié)相Co的腐蝕,浸泡產(chǎn)生的腐蝕產(chǎn)物主要是Co(OH)2；添加Cr將提高WC-Co硬質(zhì)合金在中性溶液中的耐腐蝕性能,這可能與Cr的添加明顯降低了粘結(jié)相中密排六方Co的含量有關(guān)；同時添加Ni和Cr可進一步提高WC-Co合金在中性溶液中的耐腐蝕性能,在pH=7的Na2SO4溶液中浸泡480h后,WC-Co-Ni-Cr合金發(fā)生很少量的腐蝕。"/>

最新色国产精品精品视频,中文字幕日韩一区二区不卡,亚洲有码转帖,夜夜躁日日躁狠狠久久av,中国凸偷窥xxxx自由视频

+高級檢索
WC-Co-(Ni)-(Cr)硬質(zhì)合金中性溶液中的腐蝕行為
作者:
作者單位:

硬質(zhì)合金國家重點實驗室

作者簡介:

通訊作者:

中圖分類號:

TG174.3+6

基金項目:

湖南省自然科學(xué)株洲市聯(lián)合基金資助(項目號2016JJ5041)


Corrosion Behavior of WC-Co-(Ni)-(Cr) Cemented Carbide in Neutral Solution
Author:
Affiliation:

State Key Laboratory for Cemented Carbide

Fund Project:

  • 摘要
    • |
  • 圖/表
    • |
  • 訪問統(tǒng)計
    • |
  • 參考文獻
    • |
  • 相似文獻
    • |
  • 引證文獻
    • |
  • 資源附件
    • |
  • 文章評論
    摘要:

    本文以WC粉、Co粉、Ni粉及Cr3C2粉為原料,采用粉末冶金方法制備了三組不同粘結(jié)相成分的WC-Co-(Ni)-(Cr)硬質(zhì)合金,通過極化曲線測試和浸泡實驗研究了三組合金在中性溶液中的腐蝕行為,并采用掃描電鏡、能譜分析、X射線光電子能譜(XPS)和EBSD等手段對其腐蝕機理進行了探討。結(jié)果表明,WC-Co和WC-Co-Cr硬質(zhì)合金在中性溶液中主要發(fā)生粘結(jié)相Co的腐蝕,浸泡產(chǎn)生的腐蝕產(chǎn)物主要是Co(OH)2；添加Cr將提高WC-Co硬質(zhì)合金在中性溶液中的耐腐蝕性能,這可能與Cr的添加明顯降低了粘結(jié)相中密排六方Co的含量有關(guān)；同時添加Ni和Cr可進一步提高WC-Co合金在中性溶液中的耐腐蝕性能,在pH=7的Na2SO4溶液中浸泡480h后,WC-Co-Ni-Cr合金發(fā)生很少量的腐蝕。

    Abstract:

    Three groups of WC-Co-(Ni)-(Cr) cemented carbides with different binder phase compositions were prepared by powder metallurgy using WC, Co, Ni and Cr3C2 powders as raw materials. The corrosion behavior of the three alloys in neutral solution was studied by polarization curve test and immersion experiment. The corrosion mechanism was discussed by means of scanning electron microscopy, energy spectrum analysis, X-ray photoelectron spectroscopy (XPS) and EBSD. The results show that in neutral solution the corrosion of WC-Co and WC-Co-Cr cemented carbides is mainly caused by the selective dissolution of Co and the corrosion products after immersion are mainly composed of Co(OH)2. The corrosion resistance of WC-Co cemented carbide in neutral solution can be improved by the addition of Cr, which may be related to the decrease of the content of hcp-Co in the binder phase by adding Cr. Adding Ni and Cr together can further improve the corrosion resistance of WC-Co cemented carbide in neutral solution. After 480 hours immersion in Na2SO4 solution, the WC-Co-Ni-Cr alloy sample is just corroded slightly.

    參考文獻
    相似文獻
    引證文獻
引用本文

魏修宇,金鵬,夏艷萍,余懷民,張衛(wèi)兵. WC-Co-(Ni)-(Cr)硬質(zhì)合金中性溶液中的腐蝕行為[J].稀有金屬材料與工程,2020,49(1):313~319.[Wei Xiuyu, Jin Peng, Xia Yanping, Yu Huaimin, Zhang Weibing. Corrosion Behavior of WC-Co-(Ni)-(Cr) Cemented Carbide in Neutral Solution[J]. Rare Metal Materials and Engineering,2020,49(1):313~319.]
DOI：10.12442/j. issn.1002-185X.20181248

復(fù)制
文章指標
  • 點擊次數(shù):
  • 下載次數(shù):
  • HTML閱讀次數(shù):
  • 引用次數(shù):
歷史
  • 收稿日期:2018-12-14
  • 最后修改日期:2019-03-21
  • 錄用日期:2019-04-10
  • 在線發(fā)布日期: 2020-02-16
  • 出版日期: