<th id="5nh9l"></th><strike id="5nh9l"></strike><th id="5nh9l"><noframes id="5nh9l"><th id="5nh9l"></th><strike id="5nh9l"></strike>
<progress id="5nh9l"><noframes id="5nh9l"><th id="5nh9l"><noframes id="5nh9l">
<th id="5nh9l"></th> <strike id="5nh9l"><noframes id="5nh9l"><span id="5nh9l"></span>
<progress id="5nh9l"><noframes id="5nh9l"><span id="5nh9l"><noframes id="5nh9l"><span id="5nh9l"></span><strike id="5nh9l"><noframes id="5nh9l"><strike id="5nh9l"></strike>
<span id="5nh9l"><noframes id="5nh9l">
<span id="5nh9l"><noframes id="5nh9l">
<span id="5nh9l"></span><span id="5nh9l"><video id="5nh9l"></video></span>
<th id="5nh9l"><noframes id="5nh9l"><th id="5nh9l"></th>
<progress id="5nh9l"><noframes id="5nh9l">

控制冷卻對CSP低碳錳鋼組織和性能的影響

Effect of Controlled Cooling on Microstructure and Mechanical Properties of CSP Low Carbon Mn-Containing Steel

  • 摘要: 利用Gleeble 1500熱模擬機測定了簿板坯連鑄連軋EAF-CSP工藝生產的低碳含錳鋼經奧氏體區二次變形后的CCT曲線.實驗鋼含有0.17%C,1.21%Mn和0.28%Si(質量分數).研究表明:提高熱軋后的冷卻速度使Ar_3溫度降低,導致試驗鋼的晶粒進一步細化;冷速大于20℃/s時,出現貝氏體和鐵素體的混合組織,可降低鋼的屈強比;790℃終軋,550℃卷曲時出現鐵素體/珠光體帶狀組織,提高冷速使溶質(如Mn和C)富集區在形成珠光體之前完成奧氏體—鐵素體相變是避免生成鐵素體/珠光體帶狀組織的有效方法.

     

    Abstract: By using a thermal-simulator Gleeble 1500, CCT curves of an EAF-CSP low carbon Mn-containing steel, which had been deformed in austenite region twice, were determined. The effect of accelerated cooling conditions on the microstructure and mechanical properties of the steel was studied. The steel contains 0.17% C, 1.21% Mn and 0.28% Si (mass fraction): it was found that the Ar3 temperature is lowed by increasing the cooling rate and results in the further grain refinement. The mixture of bainite and ferrite appears while the cooling rate reaches 20 ℃/s and over. The ratio of yield to strength could be decreased by increasing the fraction of bainite. Banding structure of ferrite/pearlite exists in the steel with finishing rolling temperature 790 ℃ and coiling at 550 ℃. Accelerating the cooling rate is an effective way to avoid band structure.

     

/

返回文章
返回
<th id="5nh9l"></th><strike id="5nh9l"></strike><th id="5nh9l"><noframes id="5nh9l"><th id="5nh9l"></th><strike id="5nh9l"></strike>
<progress id="5nh9l"><noframes id="5nh9l"><th id="5nh9l"><noframes id="5nh9l">
<th id="5nh9l"></th> <strike id="5nh9l"><noframes id="5nh9l"><span id="5nh9l"></span>
<progress id="5nh9l"><noframes id="5nh9l"><span id="5nh9l"><noframes id="5nh9l"><span id="5nh9l"></span><strike id="5nh9l"><noframes id="5nh9l"><strike id="5nh9l"></strike>
<span id="5nh9l"><noframes id="5nh9l">
<span id="5nh9l"><noframes id="5nh9l">
<span id="5nh9l"></span><span id="5nh9l"><video id="5nh9l"></video></span>
<th id="5nh9l"><noframes id="5nh9l"><th id="5nh9l"></th>
<progress id="5nh9l"><noframes id="5nh9l">
259luxu-164