Zhengzhou Guoyun Electronics Technology Co., Ltd specializes in the production of high-frequency and medium-frequency induction heating equipment, medium-frequency heating power supplies, medium and high-frequency quenching equipment, medium-frequency furnaces, and shaft quenching equipment. The medium-frequency power supply is composed of IGBT modules. The energy-saving IGBT-based medium-frequency technology represents a significant innovation, fundamentally revolutionizing the older medium-frequency systems characterized by thyristors, and serves as an upgraded replacement for the old-style KGPS medium-frequency systems.
The medium-frequency heating power supply using IGBT devices adopts high-efficiency combined resonance technology, low-inductance circuit arrangements, large-scale digital circuits, and more comprehensive, mature protection technologies.
On July 27, 2011, Zhengzhou Guoyun's official website for medium-frequency heating power supplies will officially undergo a successful redesign (www.zzgpl.com). This site integrates technical parameters and application fields of the new type of medium-frequency heating power supply. Visitors are welcome. The website also covers brazing equipment and gear high-frequency/medium-frequency quenching equipment.
Quenching processes are widely applied in modern mechanical manufacturing industries. Important mechanical components, especially steel parts used in automobiles, airplanes, and rockets, are almost all treated with quenching. To meet various technical requirements, many types of quenching processes have been developed. For example, according to the treated area, there are whole-part, partial, and surface quenching; according to whether the phase transformation during heating is complete, there are complete quenching and incomplete quenching (for hypo-eutectoid steels, this method is also called subcritical quenching); according to the content of phase transformation during cooling, there are分级 quenching, isothermal quenching, and under-speed quenching, etc.