PRODUCT CATEGORIES

Vacuum Heat Treatment Furnace

Vacuum Sintering Furnace

Vacuum Brazing Furnace

Aerospace vacuum heat treatment furnace

With the efforts of many vacuum science and technology workers, vacuum science and technology have developed rapidly. Among them, the scope of application of vacuum heat treatment technology is getting wider and wider, and it is developing faster and faster.

Aerospace vacuum heat treatment furnace

Vacuum heat treatment is one of the important methods of heat treatment for aero-engines. From early vacuum annealing and vacuum degassing, it gradually develops towards vacuum quenching, vacuum tempering, vacuum chemical heat treatment and special vacuum heat treatment. Design and manufacture of vacuum heat treatment furnaces, components The level and performance have been continuously improved, and a vacuum heat treatment production line has been developed.

At present, the commonly used processes include vacuum oil quenching, vacuum pressurized gas quenching, vacuum carburizing, vacuum magnetic field heat treatment, etc. Vacuum oil quenching is the main process of vacuum heat treatment at present. The technical difficulty encountered in the development process is that vacuum oil quenching may cause carbonization, which reduces fatigue performance. In the past 30 years, vacuum quenching oil and vacuum oil quenching surface carbonization have been solved. The key to technology. Vacuum pressurized gas quenching has many advantages such as smooth surface of the workpiece, no need to clean, and avoiding environmental pollution. It is an important and rapidly developing field of vacuum heat treatment in recent years.

At present, vacuum pressurized gas quenching plays an important role in the heat treatment of parts such as stainless steel, superalloys, titanium alloys, precision alloys and some structural steels in the aviation industry. Vacuum carburizing can satisfactorily solve the problem of removing the passivation film of stainless steel without adding any chemicals, without any operational difficulties and pollution; The problem of uniform carburizing of blind holes improves the penetration rate and efficiency. In recent years, the number of vacuum carburizing equipment has increased rapidly, and the scope of application has continued to expand. Vacuum magnetic field heat treatment combines vacuum heat treatment technology with electromagnetic field technology to form another branch of vacuum heat treatment.

For titanium alloys commonly used in the aerospace field, stress relief annealing of sheet metal parts and castings, solution treatment and aging treatment of fastening standard parts, hydrogen removal annealing, and constrained aging treatment of high-strength titanium alloy sheet metal parts must be performed in a vacuum in the furnace. Thermal barrier coatings (TBC), which are widely used in aero-engines and gas turbines, can prefabricate dense TGO by heat-treating thermal barrier coatings in vacuum or under different oxygen partial pressure atmospheres, thereby inhibiting the growth of TGO and achieving The effect of prolonging the thermal cycle life of thermal barrier coatings.

Vacuum brazing furnace

Vacuum brazing technology has become a very promising brazing technology, and its application in the aviation field has become more and more popular. Vacuum brazing is generally used when brazing aerospace alloys such as aluminum alloys, stainless steel, high-temperature alloys, titanium, niobium, tantalum, and other high-melting point metals. Aeroengines are one of the most widely used fields for vacuum brazing.

In order to meet the design and manufacturing requirements of high thrust-to-weight ratio, high reliability, long life, and low cost of aero-engines, new materials, new structures, and new processes are being used more and more in the aerospace field. At the same time, it also promotes the continuous development of aerospace manufacturing technology, and the welding technology as a means of aerospace manufacturing technology has also developed rapidly.

Vacuum brazing technology has unique advantages and flexibility for the connection of new materials and the manufacture of complex and precise structural parts. For some refractory materials and complex components, vacuum brazing is the only feasible and effective connection technology, and it can even achieve a “seamless” welding effect without processing the brazed joints. Therefore, vacuum brazing technology is more and more widely used in the aviation industry and other industrial fields. Many important parts of the aero-engine, such as turbine blades, compressor blades, combustion chamber components, honeycomb sealing structures, stainless steel heat exchangers, The manufacture of components such as fuel manifolds and other pipelines involves vacuum brazing technology.