Development and Application of New High Temperature Abrasion and Corrosion Resistant Alloy and Its Composite Casting Technology
High temperature abrasion and corrosion resistant alloys, also known as ultra-high temperature (UHT) alloy, are a type of materials or a type of alloy that have higher abrasion and corrosion resistance at high temperature. Currently, UHT alloys have been widely used in many industries applications, such as steam turbines, aero-engines, aircraft wings and afterburners. In general, the performance of UHT alloys can be divided into three categories: high temperature abrasion resistance, high temperature corrosion resistance and combined high temperature abrasion and corrosion resistance.
The development of new UHT alloys is driven by the demand for advanced alloys in many high temperature/high stress environments. A variety of alloying systems have been studied and developed for developing UHTA, including intermetallic compounds, iron-base alloys, nickel-base alloys, cobalt-base alloys, titanium-base alloys, nickel-base MCrAlY compounds, etc. Also, composites such as ceramics, reinforced alloys and composite materials can also be used for UHTA. In order to fabricate UHTA, several advanced techniques are required, such as powder metallurgy, rapid solidification processing and chemical vapor deposition. In addition, the fabrication of UHTA can also be enhanced by adding advanced heat treatment techniques, such as low pressure carburization, diffusion bonding and solution heat treatment.
The traditional casting method can be used to fabricate certain types of UHTA. However, this casting technique is limited by the complexity of the molten material, the geometry of the part and their combination. Due to the need for higher stiffness and precision of the alloy components, composite casting technology can be used to fabricate UHTA. This technology is usually used to manufacture complex components with complex geometry and complex manufacturing process. The main advantages of this technology is that it can reduce the production cost, improve the product performance, enhance the durability and reduce the weight of the components.
The application of UHTA has been launched in many different industries, including aerospace, automobile, chemical and power generation industries. For example, in aerospace industry, UHTA has been used for the manufacture of aircraft wings, afterburners, engine casings and turbine blades. In automobile industry, UHTA has been used for the manufacture of engines, pistons and cylinder heads. In chemical industry, UHTA has been used for the manufacture of valves and pumps. In power generation industry, UHTA has been used for the manufacture of steam turbines and generators.
In conclusion, the development and application of new UHTA have opened up a wide range of possibilities in many different industries. UHTA can not only improve the performance and durability of alloys, but also reduce the cost of fabrication. Additionally, the use of composite casting technologies in the fabrication of UHTA can make complex components easier to produce and the performance of the components can be further increased. Therefore, UHTA is becoming increasingly important in many industries due to its versatility and excellent performance.
