Introduction
Stainless steel high temperature alloy is a new type of high temperature alloy which has been widely used in aerospace, automobile, petrochemical industry and other fields due to its excellent mechanical properties, good oxidation resistance and high temperature strength, and is widely used in high temperature and cryogenic environments. This article is focused on the introduction of stainless steel high temperature alloy, the latest research and development of high temperature alloy and new application, and the development trend of stainless steel high temperature alloy.
History
In 1875, the British scientist Breuer first proposed the concept of stainless steel. In 1912, the British researcher Brearley discovered a novel kind of stainless steel which was chromium-nickel alloys, which was named martensite stainless steel. Since then, stainless steel has been widely used in various fields due to its excellent performance. In 1950s and 1960s, stainless steel was widely used in aviation and spaceflight fields due to its excellent high temperature strength and oxidation resistance. In the late 1970s, stainless steel was further developed, and the range of its application was further expanded. Later, stainless steel high temperature alloy was developed, which further expanded its application range, and its application fields have covered various industries such as aviation, petrochemical industry, automobile and so on.
Chemical Composition and Physical Properties
Stainless steel high temperature alloy is a kind of alloy with different chemical components, which requires an appropriate combination of austenitic and ferritic characteristics, and nickel, chromium, manganese and other elements are usually selected. In addition, a small amount of carbon, nitrogen, titanium, tungsten, molybdenum, copper, aluminium and other elements may be added to improve the mechanical performance of stainless steel and ensure the best performance at high temperature.
The physical properties of stainless steel high temperature alloy are related to its chemical composition. The mechanical properties of stainless steel high temperature alloy are usually divided into three categories: high temperature mechanical properties, cryogenic mechanical properties and corrosion resistance.
High Temperature Mechanical Properties
High temperature mechanical properties refer to the mechanical properties at high temperature. The fracture strength, plasticity and creep resistance of stainless steel high temperature alloy are generally higher than those of ordinary high temperature alloy. At high temperature, the high temperature strength of stainless steel high temperature alloy can be maintained for a longer period of time, and its oxidation and corrosion resistance are also relatively good.
Cryogenic Mechanical Properties
Cryogenic mechanical properties refer to the mechanical properties at low temperature. The low temperature embrittlement of stainless steel high temperature alloy is relatively small, and the strength, plasticity and creep resistance of stainless steel high temperature alloy are higher than those of ordinary high temperature alloy at low temperature, which makes it suitable for use in low temperature environment.
Corrosion Resistance
Due to its excellent oxidation resistance, stainless steel high temperature alloy can maintain its mechanical properties at high temperature and is not easy to corrode. In addition, it also has good corrosion resistance in acidic and alkaline media, and is widely used in various fields.
Application
Stainless steel high temperature alloy is widely used in aerospace, automobile, petrochemical industry and other fields due to its excellent mechanical properties, high temperature strength, oxidation resistance and corrosion resistance. In aviation, stainless steel high temperature alloy is mainly used in blade of aircraft engines, combustion chamber, exhaust system, turbine blade and nozzle, etc.; in automobile, it is mainly used in heat-resistant engine parts; in petrochemical industry, it is mainly used in heat exchangers, reaction vessels, catalysts and other parts.
Moreover, stainless steel high temperature alloy has made great progress in other fields due to its excellent properties. In fire protection, stainless steel high temperature alloy is mainly used in fire extinguishers and fire doors; in biomedical field, stainless steel high temperature alloy is mainly used in medical instruments, implants and other medical related products.
Development Trend
Due to its lightweight, no environmental pollution, no maintenance cost, high performance and other advantages, stainless steel high temperature alloy is becoming more and more popular. In the future, stainless steel high temperature alloy will be further developed to create more superior performance to meet the development needs of various fields.
Conclusion
Stainless steel high temperature alloy is a new type of high temperature alloy which has been widely used in aerospace, automobile, petrochemical industry and other fields due to its excellent mechanical properties, good oxidation resistance, high temperature strength and corrosion resistance. It has made great progress in other fields due to its excellent properties and will continue to be developed in the future. Through the introduction of stainless steel high temperature alloy, we can gain a better understanding of this material and its application.
