Abstract
As a new type of die, HFCVD diamond-coated drawing die registers a great application prospects and market potential because of its performance advantages. This study mainly focuses on the preparation system of diamond coating for large-aperture drawing die. According to the finite element analysis of the temperature field of the die base on HFCVD process, hot filament parameters on the temperature distribution of the die base is studied. And on the basis of the sdudy, a new HFCVD coating mold preparation system with rotating U-shape groove is designed, which can produce more uniform coating. The deposition experiments were carried out on the inner wall of the drawing die by the HFCVD coating mold preparation system. The cross-sectional morphology, surface morphology and Raman spectrogram of the diamond coating show that the thickness of the diamond coating is uniform and the quality is satisfactory. This provides reference for the application of the large-aperture diamond-coated drawing die.
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