锻压技术

600 MW 1Mn18Cr18N护环外补液压胀形的数值模拟与试验研究

英文标题：Research on numerical simulation and experiment of hydraulic expansion with additional liquid for 600 MW retaining ring of 1Mn18Cr18N steel

作者：李媛许焕宾曲东方杨兵

单位：辽宁科技大学北京首宏钢科技开发有限公司沈阳铸锻工业有限公司

关键词：600MW 1Mn18Cr18N 护环外补压液压胀形数值模拟

分类号：TB24

出版年,卷(期):页码：2015,40(2):65-69

摘要：

针对600 MW 1 Mn18Cr18N护环的国产化问题，利用有限元方法，通过数值模拟分析了内压、接触压力、锥角、阻力环等参数对护环胀形的影响。分析表明：内压p决定了护环的强化率，可以作为护环胀形的先行条件；接触压力pc和摩擦力fc单独作用时，护环基本不会发生变形；在锥角一定的情况下，调节pc可以有效地改善凸鼓形缺陷；壁厚一定时，高径比处于一定范围内的毛坯，可以用同一套模具生产。在此基础上，提出了护环研制工艺流程，得出了600 MW 1Mn18Cr18N护环成形所需的最佳参数组合。试验结果验证了分析结果的准确性，并表明所提出的研制工艺流程是切实可行的。

Due to the localization problem of 600 MW retaining ring of 1Mn18Cr18N steel, the influences of inner pressure, contact pressure, taper angle and resistance ring on retaining ring hydroforming were studied by FEA. Simulation result shows that the inner pressure p depends on the strengthening rate of hinges and is regarded as a necessary condition for retaining ring hydroforming; the retaining ring does not deform when contact pressure pc or fc acts alone; the adjustment of pc can effectively eliminate the defect of convex drum cone angle at a certain degree; the retaining rings can be manufactured with the same die when the ratio of height to diameter is limited to a certain range with a proper wall thickness. Based on the above, technical process flow design was proposed, and the best combination of parameters about retaining ring manufacturing with 600 MW 1Mn18Cr18N is obtained. The effectiveness of parameters is verified by the test. Test result proves that the validity of simulation, and also indicates the feasibility of the proposed techniques.

基金项目：

国家自然科学基金资助项目（10972192）

李媛（1982-），女，硕士，讲师

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