影响奥氏体烧结不锈钢性能的工艺因素

本文研究了原料粉末质量、压制压力、烧结工艺等对奥氏体烧结不锈钢材料收缩率、密度、极限拉伸强度、延伸率及抗腐蚀性能的影响。提出了以压制压力为588-700MPa;500-600℃预烧半小时;在氢气保护下于1300-1330℃烧结1-1.5小时;于冷却水套中冷却的工艺。用这种工艺生产的制品,可获得均匀、稳定的细晶粒奥氏体组织,从而具有良好的综合物理机械性能和抗腐蚀性能。

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.