Sintering Process In Aerospace Application

The world's first vacuum induction furnace was born in Germany in 1917, used to melt aircraft and rocket engines. Vacuum induction melting furnace is one of the most widely used equipment in the field of vacuum metallurgy.

For example, when nickel based, cobalt based, and iron-based high-temperature alloys are melted using the vacuum induction melting furnace process, their thermal processing performance and mechanical properties are significantly improved. Almost all materials such as stainless steel, heat-resistant steel, ultra-high strength steel, tool steel, bearing steel, as well as magnetic materials, elastic alloys, expansion alloys, etc., are melted using vacuum induction melting furnaces to ensure material performance and quality.

As is well known, the entire process of metal melting, refining, and alloying in the vacuum induction melting furnace process is carried out in a vacuum state, thus avoiding contamination caused by the interaction of the same gas phase. Secondly, under vacuum conditions, carbon has strong deoxygenation ability, and its deoxygenation product CO is continuously pumped out of the system, overcoming the pollution problem of using metal deoxidizers for deoxygenation.

The rapid development of vacuum induction melting technology is closely related to the high-temperature alloy materials required by the aerospace industry, such as high-temperature alloys required for aerospace, missiles, rockets, atomic energy and other equipment. The maximum working temperature of high-temperature alloys produced without vacuum melting method is generally only 750-810 ℃; The high-temperature alloy produced by vacuum melting method can reach a maximum working temperature of 980-1090 ℃. This is mainly due to the use of vacuum induction melting furnace to melt nickel based, iron-based, and cobalt based high-temperature alloys, which reduces the gap elements O2, N2, H2, and can completely remove non-metallic inclusions, as well as remove low melting point harmful metal impurities such as Pb, Bi, Sb, Cu, Sn, Te, etc.