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Vacuum Heat Treatment Furnace

Vacuum Sintering Furnace

Vacuum Brazing Furnace

Aerospace Vacuum Heat Treatment

The aviation industry is a high-tech industry, which adopts a large number of cutting-edge science and technology, selects various new materials with high specific strength, develops near-zero margin forming technology, precision and ultra-precision processing technology, and so on. In order to ensure the high performance, safety and reliability of aviation products, the aviation system researches and adopts vacuum heat treatment technology, and takes the lead in realizing the comprehensive quality control of heat treatment.

Vacuum heat treatment is widely used in the treatment of aerospace structural parts, such as surface carburizing or nitriding of gear structural parts, various alloys of missiles and spacecraft, due to its unique advantages of no pollution, no oxidation, small workpiece deformation and wide application range. Or stress relief, strengthening or toughening treatment of steel parts. Typical structures such as: instrument parts, transmission structures, fuel storage tanks, engine casings, etc. Vacuum heat treatment furnaces have been widely controlled by computers, and have been developed to vacuum brazing and vacuum air quenching heat treatment, including high pressure vacuum air quenching, high temperature vacuum brazing welding etc.

The aerospace vacuum heat treatment materials used in aircraft fuselage structures in recent years are comprehensively reviewed, and their specific vacuum heat treatment applications are introduced in detail.

1 Aluminum alloy aerospace vacuum heat treatment

The forecast of the application proportion of aircraft fuselage structural materials shows that the dominant material in the early 21st century is aluminum alloy. Aluminum alloy is the main structural material of aerospace equipment. One generation of aluminum alloy and one generation of high-tech equipment have gone through five generations of development, which has promoted the development of aerospace technology.

Aerospace aluminum alloys mainly refer to: spacecraft, civil aircraft, military aircraft, and launch vehicles.

The development of aluminum alloys aims at reducing weight, high reliability and long life of the structure, and focuses on high-strength, high-toughness, corrosion resistance, fatigue resistance, high comprehensive performance, service performance in extreme environments, and large-scale high-performance materials with uniform performance and low residual stress. This requires precise control of the microstructure of the material through the vacuum heat treatment process to improve the overall performance of the aluminum alloy and meet the stringent requirements for the development of the aerospace industry. Its role is extremely important and indispensable.

2 Vacuum heat treatment of high-strength steel for aerospace

The material selection of aerospace steel mainly considers standard specifications, process adaptation, performance and economic principles. When designing products after selection of high-strength steel, ensure the environmental adaptability of products; through product design, the special performance of product fatigue resistance and general performance such as reliability, maintainability and durability are completed.

For a long time, the most used steel in the aircraft manufacturing industry is medium-alloyed high-strength steel with a strength level of 1600-1850MPa and a fracture toughness of about 77.5-91MPa per square meter. At present, under the condition of maintaining the same fracture toughness index, the minimum strength level of steel has been raised to 1950Mpa. New economically alloyed high-crack-resistant, high-strength welded structural steels have also been developed.

Further improve the metallurgical production process, select the best chemical composition and vacuum heat treatment specifications, and develop high-reliability structural steel with a strength performance level of 2100-2200Mpa;

3 Vacuum heat treatment of high-strength titanium alloy for aerospace

The potential to increase the proportion of titanium alloys used in airframe parts is enormous. It is predicted that the proportion of titanium alloy used in passenger aircraft fuselage will reach 20%, while the application proportion in military aircraft fuselage will increase to 50%. The premise is to ensure: make the alloy have higher strength and reliability; further increase the use temperature; have high process performance and good weldability; be able to produce various semi-finished products; improve the structural form, develop new design solutions, Use proven alloys and processes in construction as much as possible. This requires high-quality vacuum heat treatment technology as a support.

In order to solve the problems of heat treatment oxidation and deformation of high-strength steel, stainless steel, elastic alloy and other parts of aviation accessories, the best way is to use vacuum heat treatment.

4 Vacuum heat treatment production line

The aviation industry has built a vacuum quenching and tempering production line, which is composed of two vacuum quenching furnaces + a cleaning machine and two tempering furnaces. The operation is in good condition, which improves the production level and quality of vacuum heat treatment, reduces the labor intensity of workers, and improves the work efficiency. environment.

Vacuum heat treatment equipment selection: The vacuum heat treatment furnace produced by SIMUWU is a high-quality product for vacuum heat treatment process. Good temperature control accuracy and temperature control uniformity ensure the effective vacuum heat treatment process. The equipment is easy to manage and maintain, greatly reducing maintenance costs. SIMUWU company focuses on the manufacture of vacuum furnaces, has more than ten years of relevant experience, and has a good reputation in the field of vacuum furnace manufacturing. The product line includes vacuum air quenching furnace, vacuum oil quenching furnace, vacuum brazing furnace, etc., which are widely sold in developed and developing countries.