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TA1/Q235鋼復合板累積疊軋焊界面特性

Joint interface characteristics of TA1/Q235 clad plates manufactured by accumulative roll-bonding

  • 摘要: 對TA1/Q235鋼復合板累積疊軋焊進行了研究.研究結果表明:采用累積疊軋焊方法能夠制備出結合性能較好的鈦/碳鋼復合板,其結合強度隨著累積變形量與首道次變形量的增加而提高,疊軋過程中經磨床打磨與噴丸處理獲得潔凈、新鮮并具有一定加工硬化程度的結合界面,會促進復合板結合強度的提高.800℃以下熱軋后,Q235鋼的組織呈明顯的條帶狀;而850℃以上熱軋后,Q235鋼條帶狀變形組織逐漸轉化為等軸狀,界面附近的Q235鋼脫碳,出現明顯的排列整齊且粗大的鐵素體晶粒帶.鈦側的組織主要有等軸α組織和魏氏α組織.綜合考慮軋制溫度對鈦與Q235鋼組織與界面結合性能的影響,累積疊軋溫度應控制在800~850℃之間.

     

    Abstract: A manufacturing process bas titanium ed on the accumulative roll-bonding (ARB) technology for TA1/Q235 clad plates was demonstrated. It is found that well-bonded clad plates can be obtained by this process. The bond strength improves as the accumulative deformation and the first pass deformation increase. The surface treatment methods, i.e. rotoblasting and grinding help get a clean, fresh and work-hardening interface, therefore improve the bond strength of TA1/Q235 clad plates. When the rolling temperature is lower than 800℃, the stripped microstructure of Q235 steel can be examined. However, when rolling temperature is higher than 850℃, this kind of stripped microstructure turns into equiaxed grains due to recrystallization. In addition, there are ferrite belts with regular and coarse grains along the joint interface, but the microstructure of TA1 titanium is mainly equiaxed α and Widmannstatten α structures in metallographic analysis. Considering the microstructures of Q235 steel and TA1 titanium and their bonding properties, the ARB temperature should be controlled in the range of 800 to 850℃.

     

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