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    WANG Song,ZHANG Weihong,ZHOU Xiaoying,WANG Jiangang.Effect of quenching and tempering processes on microstructure and wear resistance of high-carbon hot grinding disc[J].Journal of Hebei University of Science and Technology,2020,41(6):537-543
    淬火回火工藝對高碳熱磨片顯微組織及耐磨性的影響
    Effect of quenching and tempering processes on microstructure and wear resistance of high-carbon hot grinding disc
    Received:July 22, 2020  Revised:October 15, 2020
    DOI:10.7535/hbkd.2020yx06008
    中文關鍵詞:  黑色金屬及其合金  高鉻鑄鐵  熱處理  組織轉變  碳化物  磨損性能
    英文關鍵詞:ferrous metal and its alloy  high-chromium cast iron  heat treatment  microstructure change  carbide  wear performance
    基金項目:河北省高等學?茖W技術研究項目(ZD2020189)
    Author NameAffiliationE-mail
    WANG Song School of Materials Science and Engineering,Hebei University of Science and Technology, Shijiazhuang;Hebei Key Laboratory of Material Near-Net Forming Technology, Shijiazhuang  
    ZHANG Weihong Hebei Qianjin Machinery Factory, Shijiazhuang  
    ZHOU Xiaoying School of Materials Science and Engineering,Hebei University of Science and Technology, Shijiazhuang;Hebei Key Laboratory of Material Near-Net Forming Technology, Shijiazhuang  
    WANG Jiangang School of Materials Science and Engineering,Hebei University of Science and Technology, Shijiazhuang;Hebei Key Laboratory of Material Near-Net Forming Technology, Shijiazhuang wm094212@163.com 
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    中文摘要:
          為了解決熱磨片服役過程中出現的磨損失效問題,對高碳熱磨片在淬火回火過程中的顯微組織變化及耐磨性進行了研究。以高鉻高碳鑄鐵為研究對象,利用金相顯微鏡、X射線衍射儀、硬度計、磨損試驗機等對經過熱處理后的樣品進行組織觀察和性能測試。實驗結果表明:樣品原始組織由初生(Cr,Fe)7C3、共晶(Cr,Fe)7C3、馬氏體及奧氏體組成;低溫回火時,碳化物變化不明顯,基體為回火馬氏體+奧氏體;隨著回火溫度的升高,碳化物逐漸增加,回火馬氏體逐漸減少;當溫度超過450 ℃時,回火馬氏體消失,基體組織轉變為鐵素體+奧氏體;硬度隨回火溫度的升高呈現先略微減小、然后增大再減小的趨勢,在450 ℃時硬度最高,為63.4HRC;與鑄態相比,均勻分布的碳化物耐磨性提高了2.53倍。研究淬火回火工藝對高碳熱磨片顯微組織及耐磨性的影響,為提高高碳熱磨片的耐磨性、延長其使用壽命提供了理論依據。
    英文摘要:
          In order to solve the problem of wear failure during the service of the hot grinding discs, the microstructure changes and wear resistance of high-carbon hot grinding discs during quenching and tempering were investigated. Taking high chromium high carbon cast iron as the research object, the microstructure and performance of the heat-treated specimen were studied by means of metallographic microscope, X-ray diffraction, hardness tester and wear tester. The results show that the original microstructure consists of primary (Cr,Fe)7C3, eutectic (Cr,Fe)7C3, martensite and austenite. When tempering at a lower temperature, the carbides are not obviously changed and the matrix is tempered martensite and austenite; with the increase of temperature, the carbides gradually increases and the tempered martensite gradually decreases; the tempered martensite disappears and the matrix microstructure changes to ferrite and austenite over 450 ℃. The hardness first decreases slightly, then increases and finally decreases, and the maximum value is 63.4HRC at 450 ℃. The wear resistance of uniformly distributed carbides is increased by 2.53 times. The results of the effect of quenching and tempering process on the microstructure and wear resistance of high-carbon hot grinding disc provide a theoretical basis for improving the wear resistance and service life of high-carbon hot grinding disc.
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