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STUDIES ON THE HEAT TRANSFER BEHAVIOUR OF THE INTERFACE BETWEEN WORKPIECE AND MEDIA IN THE QUENCHING PROCESS

M. Cheng , J. Cheng , S.Q. Yuan and F. Zhao(North China Institute of Technology , Taiyuan 030051 , China)

On the basis of experimental studies, a program dealing with the boundary condition in the quenching process has been developed. In this program the method of Beck nonlinear estimation (inverse heat conduction method) was adopted so that the problem of the heat transfer coefficient varying significantly and complicatedly in the quenching process, has been effectively solved. Calculation result shows that the heat transfer coefficient between quenching workpiece and media boundary has a peak value, and this value and the temperature interval in which the peak value occurs vary with the cross section dimensions of workpiece, the types of the quenching media, the temperature and the surface position.

关键词: quenching , null , null

STUDY ON SYNCHRONIZER HUB PLASTIC FORMING

B. H. Zhang and Z. M. Zhang North China Institute of Technology , Taiyuan 030051 , China Mancuscript received 30 July 1999

金属学报(英文版)

Metal flowing has been numerically simulated for synchronizer hub at different forming conditions. The influences of billet shape, frictional factor,deformation degree and radius of rounded corner on form- ing for been studied and the processing parameters have been optimized. On the basis, a new technol- ogy of refilling multiplicity forming has been put forward and workpiece that meets the requirement of synchronizer hub has been manufactured.

关键词: synchronizer hub , null , null

材料期刊网

STUDIES ON THE HEAT TRANSFER BEHAVIOUR OF THE INTERFACE BETWEEN WORKPIECE AND MEDIA IN THE QUENCHING PROCESS

STUDY ON SYNCHRONIZER HUB PLASTIC FORMING

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