Brand:Heat Treatment-1
Model:Nakanihon-ro kogyo
Quenching A process to heat the steel to form austenite and transform it to martensite by quickly cooling it in water or oil. Quenching is also a conventional mean used to forge Japanese swords. | Tempering A process to provide toughness to the hardened steel after quenching. The martensitic steel is reheated, held at a specific temperature range for a certain period of time, and gradually cooled. A desired structure can be attained by changing the holding temperature. If the steel is tempered at about 600C, sorbite is formed, while troostite forms if it is tempered at around 400C. A series of processes subsequent to quenching that form sorbite is especially called thermal refining.
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Annealing A process to remove internal stresses caused by hardening, soften the structure, and improve toughness for flattening. The steel is held at a particular temperature in the austenite region for sufficient time and then slowly cooled in a furnace. |
Normalizing |
CVD coating
Chemical vapor deposition (CVD) is a process to cause chemical reactions on the
surface of a substrate for the deposition of a thin film. When the volatile metal
compound salt, vaporized at low temperature, contacts with the surface of the
substrate, which is heated at high temperature, it induces a desired metal
compound to precipitate and form a thin film on the surface. Recently, cutting tools
and dies are shifting from single layer films to multi-layer films, and coating films that
have multiple properties are attracting wide attention. Especially, concerning the
VD coating on dies, although TiC single layer films had been conventionally used,
the three-layer TiC/TiCN/TiN coating has occupied the mainstream with its superior
heat resistance and other various properties.
Features
*With no need of high vacuum, only a small space is required for installation compared with the film formation rate and treatment area.
*Good for mass production with fast film formation and large treatment area.
*Uniform film formation is possible even on uneven surfaces when compared with vacuum deposition, such as PVD and MBE.
*Growing film on a specific portion of substrate surface is possible by selecting the surface and the chemical species of the supplied vapor
Please contact us if you are interested in the following services: Annealing of steel, brass, and beryllium; Sub-zero treatment; Shrink fitting; and other special treatments.
As to our vacuum heat-treatment furnaces, eight furnaces are installed to respond to any needs ranging from small charge (gross weight 30kg) to large charge (gross weight 600kg). Our plant is also equipped with a special vacuum furnace (5 bar pressure quenching), which is absolutely superior to other competitors for stainless steel heat treatment (especially of parts). We are confident that we can perform up to your expectations and are happy to provide you with our services.
