DEVELOPMENT OF A NEW HOT FORMING

TECHNOLOGY FOR HEAVY RETAINING RINGS

Guo Huiguang  Liu Jiansheng  Yang Chaocao  Chen Huiqn

(School of Materials Science and Engineering, Taiyuan University of Science &Technology, Taiyuan 030024)

Abstract: In accordance with defects of cracking, long processes, poor controllabiitiy, uneven structure properties during open-die forging processes for highMn-N alloy steel heavy retaining ring forging, a new saving force technology is developed by considering the practice. The punching-extruding, expanding-extruding complex hot forming of two punches with an outer ring is included in this technology. And the new technology is studied with both thermomechanical, numerical simulation, and test engineering design. Comphrehensive and systematic data of retaining ring forging are obtained. The technology is put into practice.

Key words: Heavy retaining rings  Hot forming  New technology

CLC No: TG31

山西省高校科技研究开发资助项目(2044). Received 20040215, received in revised form 20040826