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Advanced structural ceramics with high strength, high temperature resistance, corrosion resistance, and a series of advantages, demonstrated excellent performance in complex working conditions, has become a powerful alternative metal products, widely used in metallurgy, petroleum, machinery, defense and military , aerospace and other fields. Tianjin University, after years of research, to take full advantage of the high strength of zirconia products, excellent physical properties such as corrosion resistance, the successful development of toughened zirconia ceramic cylinder liner. Toughened zirconia ceramic cylinder liner using cold isostatic pressing, cold isostatic pressing of ceramic powder molding process influenced by many factors, forming regularity complex. Has been in process design, are generally rely on the experience of the designer or repeated experiments to determine the efficiency of this method is very low. Finite element simulation can master the the powder material forming the law to understand the effects of various factors, and may be a fundamental solution to over-rely on the experience of process design to achieve improved product quality, process design efficiency purposes. Toughened zirconia ceramic cylinder liner as the object of study, cold isostatic pressing of ceramic powder molding process simulation study, analysis of the laws of geometry deformation, powder flow law, the law of the density distribution, the stress-strain field distribution in the powder molding process, and analysis of the powder molding process parameters. The study found that the powder particles near the mandrel molding the first to enter the densification stage, and the the densification trend by the mandrel outward expansion. Simulation results, the error of about 1%, more consistent with the experimental results. Powder CIP molding process, by adjusting the relief time, found that the lower the relief speed conducive to obtain a high green body density, and the speed of pairs of relief relief molding pieces approach can improve the relative density distribution uniformity, reduced molding member to the upper left-hand corner, the density gradient region, to improve the molding pieces relief safety. As the molding pressure increases, the degree of densification of the preform increases, the amount of elastic recovery of the molding member is reduced, and when the molding pressure is greater than 200MPa, more secure relief, using slightly larger than 200MPa molding pressure can help improve molding yield, but also to facilitate stripping. Rigid gland, the overall distribution of body density molded parts end face has a very regular geometric shape, forming a green body has the appearance of \better.
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