Transactions of Materials and Heat Treatment

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

Authors： Li Yuan Xu Huanbin Qu Dongfang Yang Bing

Unit： University of Science and Technology Liaoning Forging Branch Beijing SHG Technology Research and Development Co. Ltd. Shenyang Casting and Forging Industry Co. Ltd.

KeyWords： 600 MW 1Mn18Cr18N retaining ring hydraulic expansion with additional liquid numerical simulation

ClassificationCode：TB24

year,vol(issue):pagenumber：2015,40(2):65-69

Abstract：

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.

Funds：

国家自然科学基金资助项目（10972192）

李媛（1982-），女，硕士，讲师

Reference：

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