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大型鈦環(huán)熱輾擴(kuò)成形軋輥尺寸效應(yīng)及優(yōu)化
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Effects and Optimization of Roll Sizes in Hot Rolling of Large Rings of Titanium Alloy
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National Natural Science Foundation for Key Program of China (50335060) and National Science Found of China for Distinguished Young Scholars (50225518)

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    摘要:

    在大型鈦環(huán)熱輾擴(kuò)成形過程中，驅(qū)動輥半徑R1與芯輥半徑R2的比值R1/R2對變形區(qū)幾何形狀有重要影響，而后者對于獲得高質(zhì)量環(huán)件起著決定性的作用。本實(shí)驗(yàn)首先對變形區(qū)幾何形狀進(jìn)行了解析描述，定量確定了其與R1/R2之間的關(guān)系；其次，基于動力顯式FE程序ABAQUS/Explicit，建立了可靠的大型鈦環(huán)熱輾擴(kuò)成形過程的熱力耦合3D-FE模型；最后，采用FE模擬方法，從變形區(qū)幾何形狀角度研究了該成形過程中R1/R2對環(huán)件成形質(zhì)量的影響及機(jī)制。研究結(jié)果表明，存在R1/R2的一個優(yōu)化取值范圍。R1/R2在此范圍內(nèi)取值

    Abstract:

    In hot rolling of large rings of titanium alloy (LRTs), the ratio of roll radii R1/R2, i.e., the ratio of the radius of the driver roll R1 to that of the idle roll R2, has a significant effect on the geometric shape of the deformation zone (GSDZ) which plays a decisive role in achieving LRTs with high quality. In the study, an analytical description of the GSDZ is presented, and quantitative relationships between the GSDZ and R1/R2 are determined. Then a validated coupled thermo-mechanical 3D-FE model of the process is developed in the dynamic explicit code ABAQUS/Explicit. Finally, an investigation is conducted regarding the effects of R1/R2 on the quality of LRTs from the view point of GSDZ using FE simulation. The results show that there is an optimized range of R1/R2 for obtaining LRTs with better end-plane quality and more uniform strain and temperature distributions

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王 敏,楊 合,郭良剛,孫志超.大型鈦環(huán)熱輾擴(kuò)成形軋輥尺寸效應(yīng)及優(yōu)化[J].稀有金屬材料與工程,2009,38(3):393~397.[Wang Min, Yang He, Guo Lianggang, Sun Zhichao. Effects and Optimization of Roll Sizes in Hot Rolling of Large Rings of Titanium Alloy[J]. Rare Metal Materials and Engineering,2009,38(3):393~397.]
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  • 收稿日期:2008-06-19
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