Diamond bearing sintering process

The diamond bearing sintering process comprises the following steps: mounting a steel bottom die, and sticking graphite paper on the inner wall surface of the steel bottom die; polycrystalline stickers are pasted on the inner walls of the graphite paper, and polycrystalline particles on the polycrystalline stickers face the center line of the steel bottom die; a bearing steel body is placed in the cavity of the steel bottom die, and the inner cavity of the bearing steel body is filled with plastic resin sand; a gap between the outer wall of the bearing steel body and the polycrystalline sticker is filled with tungsten powder; filling copper alloy particles into an opening in the top of the steel bottom die; and sintering in a sintering furnace. The steel jacket and the graphite paper are used for replacing a graphite jacket and a ceramic die, so that the die is prevented from cracking, the size of the whole set of die is reduced, and the number of workpieces sintered in the furnace at the same time is increas