Silicon nitride heat treatment furnace

Vacuum technology is the basis of heat treatment process innovation.

Heat treatment is a process in which metal / steel parts are completely or partially exposed to time temperature sequence to change mechanical and / or corrosion properties. There are many applications, such as

Annealing, hardening, tempering, aging and surface hardening

In order to obtain higher material strength, better wear resistance or improved corrosion resistance of components, all these processes require temperatures up to 1.000 ° C and higher temperatures and specially developed furnaces to achieve this range.

Vacuum annealing

Annealing is a heat treatment that involves heating to a specific temperature, holding and cooling slowly. This process is usually used to obtain the softer structure of the part and optimize the material structure for subsequent work steps (machining, forming). The parameters depend on the material and the structure required.

Vacuum quenching and tempering

Hardening is a typical heat treatment process that combines heating to a specific temperature (mostly above 900 ° C) and direct rapid cooling or quenching of parts. The selection requirement is to partially or completely change the structure of the material to martensite. Parts are tempered after hardening to obtain high ductility and toughness.

Vacuum surface hardening

One of the important processes is surface hardening or carburizing. The parts are heated to 900 ° c-1.000 ° C and carbon is absorbed by adding specific gases (hydrocarbons) to the furnace atmosphere, thus enriching the surface of the parts. After this treatment, the parts are quenched to obtain the required properties. This increases resistance to stresses and friction on the component surface. The core of the part remains softer and more malleable, thus allowing the part to withstand high stress throughout its service life. For example, all gear components of the transmission are treated in this way.