通化硕抠家具有限公司

    高級檢索

    空心芯棒服役過程溫度場及熱疲勞有限元分析

    Finite Element Analysis on Temperature Field and Thermal Fatigue of Hollow Mandrel in Servicing Process

    • 摘要: 針對Φ340 mm MPM機組芯棒服役過程建立三維有限元模型，設計空心芯棒內(nèi)徑尺寸，分析空心芯棒服役過程溫度場和空心芯棒表面熱疲勞。分析認為：對于外徑為358．1 mm的空心芯棒來說，內(nèi)徑在200～240 mm時能較好地平衡減重和控制變形；內(nèi)徑為214 mm的空心芯棒，在軋制、第1次空冷、第1次水冷3個階段的溫度場與實心芯棒相同區(qū)域的溫度場基本一致，而在其他各服役階段時的內(nèi)表面溫度比實心芯棒相同位置處高13～18℃?？招男景襞c實心芯棒的熱應力的差別，導致空心芯棒的環(huán)向和軸向裂紋比實心芯棒萌生更早、擴展速度更快。

       

      Abstract: Based on the servicing process of the hollow mandrel of the Φ340 mm MPM,a 3-D FE mathematic model is set up.with which the ID dimensions of the mandrel is designed,and the temperature field and surface thermal fatigue of it in servicing process are analyzed.The analysis result reveals the facts as follows.For the hollow mandrel with OD as 358.1 mm,in case of ID as 200~240 mm,balance weight reduction and deformation control are better obtained,while in case of ID as 214 mm,the temperature fields of the hollow mandrel at the three phases i.e.,rolling,the first air cooling and the first water cooling are almost the same as those of the solid mandrel at the same phases.However at the other servicing phases the inner surface temperatures of the former are 13~18 ℃ higher than those of the solid mandrel at the same positions.It is also revealed that the difference between the thermal stress of the hollow mandrel and that of the solid one leads to the result that both the circular and axial cracks of the former are developed earlier,and extended faster than those of the latter.

       

      • HTML全文

    /

    返回文章
    返回