<div id="5kwrg"><tr id="5kwrg"></tr></div>
  • <dl id="5kwrg"><ins id="5kwrg"></ins></dl>
    <dl id="5kwrg"><ins id="5kwrg"><thead id="5kwrg"></thead></ins></dl>
    <div id="5kwrg"></div>
  •  當前位置:精細淬火冷卻技術 >> 油淬工件淬火畸變特點的成因
    油淬工件淬火畸變特點的成因
    (北京華立精細化工公司,北京 102200)
    發表于《熱處理技術與裝備》2010年第5期
    摘要:與高壓氣淬或者低溫鹽浴淬火相比,油淬工件的淬火畸變特點是:畸變數據零亂而沒有規律;最大畸變程度通常也更大。出于對淬火油冷卻特性曲線的錯誤認識而演變出來的工件表面溫度與表面熱流密度之間的一一對應關系,不能解釋這種特點的成因。試驗觀測證明,表面溫度與表面熱流密度之間存在的是所處條件下的非一一對應關系。這種非一一對應關系是由蒸汽膜內氣體的流動規律和冷卻的中間階段特性所引起的。應用這種非一一對應關系,既能解釋淬火畸變程度更大的原因,也能解釋畸變數據無規律的成因。
    Causes of quenching distortion characteristics of oil-Quenched work pieces
    (Beijing Huali Fine Chemical Co., Beijing 102200, China)
    Abstract: As compared with high-pressure gas quenching and low-temperature salt-bath quenching, the quenching distortion of oil-quenched work pieces features in irregularity and greater distortion. The one-to-one correspondence between the work piece surface temperature and surface heat flux density, based upon the wrong understanding of the temperature-cooling rate curve of quenching oil, cannot explain the cause of such feature. Tests indicate conditional non-one-to-one correspondence between surface temperature and surface heat flux density, which is resulted from the gas flow rules inside of steam blanket and the characteristics of the intermediate stage of quenching. Such non-one-to-one correspondence can explain greater quenching distortion and irregular distortion data. Only quenched by immersing work pieces into an evaporating liquid then has this king of distortion characteristics.

    評論
    匿名用戶 [來自62.210.78.179]
    2014-10-19 21:33
    This is way better than a brick & mortar esbtiltshmena.



    我來說兩句



    环球娱乐有彩票的哪个
    <div id="5kwrg"><tr id="5kwrg"></tr></div>
  • <dl id="5kwrg"><ins id="5kwrg"></ins></dl>
    <dl id="5kwrg"><ins id="5kwrg"><thead id="5kwrg"></thead></ins></dl>
    <div id="5kwrg"></div>
  • <div id="5kwrg"><tr id="5kwrg"></tr></div>
  • <dl id="5kwrg"><ins id="5kwrg"></ins></dl>
    <dl id="5kwrg"><ins id="5kwrg"><thead id="5kwrg"></thead></ins></dl>
    <div id="5kwrg"></div>