Ultra-high strength alloy refers to the alloy with high yield strength and tensile strength, which has high strength and high toughness. It is generally used in key load-bearing parts such as aircraft structure, landing gear, rocket shell and so on. Corrosion resistant alloy is a metal material with corrosion resistance, high temperature resistance and wear resistance in room temperature or high temperature corrosion medium. it can be divided into Fe-based alloy, Ni-based alloy, Ni-Fe-based alloy and so on. it is an indispensable key component in energy, petrochemical and other industries, and has become one of the important indicators to reflect the advanced level of a country's industry. Precision alloy usually refers to functional metal materials with special physical properties, such as magnetic, electrical, thermal and other properties, including magnetic alloy, elastic alloy, expansion alloy, thermal bimetal, shape memory alloy and so on.
(2) downstream applications of high performance alloys.
High performance alloys show excellent properties in many dimensions and have high application value. among them, the alloy materials with high strength and good physical properties represented by ultra-high strength alloy, precision alloy and ultra-high purity stainless steel are widely used in aircraft fuselage structures and engine parts. high temperature corrosion resistant alloy materials represented by corrosion resistant alloys are widely used in aerospace, nuclear engineering, petrochemical and marine engineering fields.
1) Application of high performance alloys in aerospace field.
Ultra-high strength alloy has a huge application space in special fields such as aircraft structural parts. In order to meet the needs of long life, easy maintenance and lightweight of aircraft, the structure of matrix parts is developing in the direction of integration, complexity and thin wall. the new aircraft tends to the overall structural design scheme, and new materials are used to improve the structural strength of the aircraft. With the continuous development of material technology, forging technology and processing technology, it is an inevitable choice to use ultra-high strength alloy to manufacture the main load-bearing components of large aircraft landing gear.
At present, the landing gear materials widely used abroad are ultra-high strength alloy steel, such as 35NCD16 in France, 30 steel in Russia, 300m in the United States and so on. This kind of high-strength material can reduce the mass of landing gear, and weight reduction has always been an important index in landing gear design. At the same time, the excellent comprehensive performance of ultra-high strength alloy material itself can ensure the reliability of landing gear work. In addition to ultra-high strength alloys, ultra-high purity stainless steel and precision alloys are also used in aero-engines, missiles, gyroscopes, fasteners, avionics systems, pipelines and other airborne components.
2) Application of high performance alloys in petrochemical and nuclear engineering.
China's petrochemical industry has a large scale and a strong demand for equipment, which is based on the demand for high-performance alloys. In addition, in recent years, the onshore oil and gas field has gradually entered the middle and later stage of exploitation, and in the later stage, it is found that the exploitation environment of the oil field is getting worse and worse, mainly manifested in the increase of oil well depth, the increase of oil and gas burial pressure and temperature, and the enhancement of corrosion in the production environment, so there is a greater demand for corrosion resistant alloys. However, the global offshore oil and gas resources, shale gas and other unconventional oil and gas resources have great exploitation potential and good exploration prospects, but they are also faced with the problem of increasingly stringent exploitation environment. The exploration and development of oil and gas resources in the shallow water area of the continental shelf started earlier. In the future, the reserves need to be extended to the offshore deep water area, which will be more corrosive in the deep water area, which will put forward higher requirements for alloy properties. In addition, compared with conventional oil and gas exploitation, shale gas production requires higher performance and greater demand for corrosion-resistant, high-temperature and wear-resistant materials. The growth prospect of high performance alloys in petrochemical industry is good.
As a clean and efficient energy, nuclear power has always been the development direction of countries all over the world. By the end of 2020, there were 448 nuclear reactors in the world with a total capacity of 397.78GW. In March 2022, the National Development and Reform Commission and the National Energy Administration jointly issued the "14th five-year Plan for Modern Energy system", clearly proposing to comprehensively master the third-generation nuclear power technology and actively develop nuclear power in a safe and orderly manner. By 2025, the installed capacity of nuclear power will reach about 7000 kilowatts, which will become one of the main energy sources in the future, which is expected to promote the demand and development of upstream corrosion-resistant alloys and other high-performance alloys.
3) Application of high performance alloys in the field of marine engineering.
Marine mineral resources represented by marine oil and gas resources are the focus and hot spot of the development of marine resources in the world, and speeding up the development and utilization of marine resources has become an important strategic orientation for the development of countries all over the world. Metals are prone to stress corrosion cracking, hydrogen embrittlement, corrosion fatigue and intergranular corrosion in seawater corrosion. High strength, high toughness and high corrosion resistance of high performance alloys effectively ensure the implementation of marine engineering. With the continuous investment in the research of offshore platform, core technology and key common technology of offshore oil and gas development equipment, and the enhancement of construction capacity of deep-sea pipe laying system, deep-sea riser system, underwater operation equipment, etc., the localization rate of supporting equipment will continue to improve the rapid development of marine engineering special equipment manufacturing industry and the trend of import substitution, which will effectively promote the development of domestic corrosion resistant alloy industry. In addition, China is one of the countries with the poorest freshwater resources per capita in the world, and the amount of freshwater resources per capita is only 1 / 4 of the world average. In the future, there will be a great opportunity for the development of seawater desalination engineering in China, which will also promote the growth of demand for high-performance alloy materials such as corrosion-resistant alloys.