The main features of isostatic pressing are:
(1) The density distribution of the extruded green body is relatively uniform, and the internal structural defects are less;
(2) Green bodies with controlled bulk density can be produced, and the pressure in the isostatic high-pressure vessel is proportional to the density of the green bodies;
(3) Since the pressure in the high-pressure vessel is much higher than that of general molding, green compacts with higher bulk density can be prepared, and even binderless molding of petroleum coke powder can be performed;
(4) It can produce green bodies with complex shapes, such as spherical or tubular green bodies can be directly pressed;
Basic Concepts of Isostatic Pressing Technology
In simple terms, isostatic pressing technology is a technology that applies equal pressure to the surface-closed material from all directions. In powder metallurgy, this technology mainly acts on the consolidation and forming of powder materials. After practice, the application of isostatic pressing technology in powder metallurgy has obvious technical advantages. First, this uniform pressure can densify powder metallurgy materials and make them have higher strength; secondly, isostatic pressing technology can Defects within the material are reduced or even eliminated; finally, the technology can also act as an adhesive, bonding dissimilar materials together at high temperatures. Due to the obvious advantages of isostatic pressing technology in the field of powder metallurgy, this technology has been widely used in the field of materials science and engineering. So far, the products processed by isostatic pressing technology can be applied to industries with strict material requirements such as aerospace, mining machinery, synthetic diamond, petrochemical and atomic energy. Isostatic pressing technology can directly form geometrically loaded alloy parts under certain conditions, and the products produced by isostatic pressing powder metallurgy technology have better physical and mechanical properties. The application of isostatic pressing technology enables some powder metallurgy material products to replace casting metallurgical materials in terms of performance and life, thereby reducing the use of casting technology and having a certain environmental protection effect.
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