Steel Hardening and Heat Treatment of Steel

If you are looking for a supplier to meet your steel heat treatment needs, do contact us. We own technologies for hardening and tempering of small steel items and use these technologies in our own manufacture of products, such as pins, IXA nails, upholstery fasteners and springs.

We offer the service of a continuous furnace with heating in a protective atmosphere and in a polymer bath as well as tempering in a continuous or batch furnace.

Steel hardening is a method of thermal treatment of steel to improve certain mechanical and physical properties. During hardening steel is heated to a “hardening temperature” and is then rapidly cooled by quenching in liquid. A quenched component is harder and highly resistant to wear, but it loses its toughness and therefore becomes more brittle. There are two types of hardening – martensite and bainite.

Hardening is followed by “tempering” to reduce the brittleness of steel caused by martensite hardening. Tempering is based on the partial transformation of the structure of the material at temperatures of 150 to 400 °C.  An unfavourable phenomenon caused by the tempering of steel is a decrease of the hardness of the tempered material. However, tempering at temperatures above 400 °C allows the formation of a new structure that is very strong and tough.

Our most common process is “continuous hardening”, when small products are first carried on a jogger to the retort hardening furnace and then fall through into the quenching bath. From there they are carried by a magnetic moving belt to the tempering furnace.

Both these processes, hardening and tempering, are referred to as heat treatment of steel.