1. Thermal stability · Oxidation resistance: Precision stainless steel parts can resist oxidation in high temperature environments and maintain the stability of their surface and internal structure. This is mainly due to the addition of alloy elements such as Cr, Al and Si to stainless steel. These elements can form a dense oxide film (such as Cr2O3, Al2O3) on the surface of the steel, effectively preventing the generation and rupture of the oxide film, thereby prolonging the service life of the parts or increasing the service temperature. · Gas medium corrosion resistance: In addition to oxidation resistance, precision stainless steel parts also have good resistance to gas medium corrosion, which can maintain their stable performance in a variety of high temperature and corrosive gas environments. II. High temperature strength · Creep strength: At high temperatures, precision stainless steel parts can resist slow plastic deformation, that is, creep. Creep strength refers to the maximum stress that a part can withstand when it works at high temperature for a long time at a certain critical creep rate (or reaches a critical value within a certain time) within a certain temperature range. · Durable strength: Durable strength refers to the critical stress that a part reaches to fracture at a certain limited temperature and within a certain limited time. It reflects the ability of the part to withstand stress for a long time under high temperature. · High temperature short-term strength: The strength value measured by placing the sample in a high temperature environment in the same way as the tensile test at room temperature is the high temperature short-term strength. It reflects the ability of the part to resist fracture for a short time under high temperature. III. Other Heat Resistance · Coefficient of Thermal Expansion: Precision stainless steel parts have a lower coefficient of thermal expansion at high temperatures, which means that when the temperature changes, the size change of the parts is relatively small, which is conducive to maintaining the accuracy and stability of the equipment. · Thermal Conductivity: Although the thermal conductivity of stainless steel is relatively low, within a certain range, its thermal conductivity can meet the heat dissipation requirements in high temperature environments and prevent parts from being damaged due to overheating. IV. Influencing Factors · Alloy Elements: The content of alloy elements such as Cr, Al and Si has an important impact on the heat resistance of precision stainless steel parts. With the increase of the content of these elements, the heat resistance of the parts is usually also improved. · Heat Treatment: Through appropriate heat treatment processes, such as solution treatment, aging treatment, etc., the heat resistance of precision stainless steel parts can be further improved.