PROCESSING FACTORS INFLUENCING PROPERTIES OF AUSTENITE SINTERED STAINLESS STEEL

The present paper has described the influence of powder quality, compacting pressure, sintering process, etc. on the shrinkage, density, ultimate tensile strength, elongation, corrosion resistence of sintered austenite stainless steel.The chemical compositions which can meet the requirements of the properties of structural parts were determined. The raw materials used in this research were stainless steel powders produced by water atomizing process. It is shown in experiments that the austenite experiments that the austenite stainless sted powder used in experiments compacted uncer a pressure of 588-700MPa,pre-sintered at 500-600℃ for 0.5 hour and followed by sintering at 1300-1330℃ for 1-1.5 hour in hydrogen atmosphere and then cooling in a cooling water jacket. The products produced by this process have homogeneous and stable austenite structure with fine grain, so that a superior combination of physico-mechanical properties with wear resistance can be obtained.