Quenching is a heat treatment process in which steel is cooled at an appropriate speed to obtain a martensite structure, after blade has been heated to a certain high temperature and keeping the high temperature for a certain period of time.
ANNEALING
Annealing: is a heattreatment process that is used tosoften a material and improve itsductility and toughness.
Benefit: to prevent forming crack-ing, easy to punch, tap, tie andother processing.
QUENCHING
Quenching is a common heattreatment process often used toharden materials, whichcan improve the wear resistance, strength,corrosion resistance ofthe steel, etc. It's a common processfor blade heat treatment.
TEMPERING
Tempering is a heat treatment process closely done after Quenching ,which is used to reduce the brittleness of steel that has been hardened.Tempering helps to reduce the stress in the material,which improves its toughness.
CRYOGENIC
It is a continuation process afterquenching. Function: Make thesteels continue to cool down to acertain temperature below roomtemperature, so that the residualaustenite can be transformed intomartensite, and the hardness andwear resistance can be improved,and the stability of the material canbe improved.
FULLY ANNEALED
Annealing is typically done by heating the material to atemperature above its recrystallization temperature andthen cooling it slowly.
STRESS RELIEF ANNEALING
Stress relief annealing is a heat treatment process that isused to reduce or eliminate the internal stresses thatcanbuild up in a steel as a result of uneven temperature.
WHAT IS HEAT TREATMENT?
The core of heat treatment is the use of heat to change the properties of steel. This is typically done by heating the steels to a specific temperature for a certain period of time, and then cooling them at a controlled rate. The specific temperature, heating rate, and cooling rate will depend on the type of steels being treated and the desired outcome.
TEMPERING
Tempering:It is typically done by heating the steel to a temperaturre below its critical temperature for a certain period of time,and then cooling it in a way that meets the requirements.
Steel can achieve the purpose of improving the hardness, wearresistance, toughness, elasticity and some special propertiiesthrough quenching and tempering. After steel is quenched, their structure and internal stresss are unstable. In order to stabilize the structure, eliminate stress, adjustthe hardness, and improve the toughness, it must be tempered.According to different tempering temperature ranges, temperingis divided into three types: low temperature tempering, mediumtemperature tempering and high temperature tempering.
CRYOGENIC
Cryogenic treatment is also called cold treatment, which is tto continue cooling the steels that have been quenched to room temperature to subzero temperature.
The process is intended to further improve the hardnesss anddimensional stability of the steel by altering its microstructure.
THE HEAT TREATMENT EQUIPMENTS WE USE
VACUUM HEAT TREATMENT EQUIPMENT
Advantage
Provided stable hardness (the deviation is about +1 HRC) theebest toughness and rust resistance, and basically solve thequality problem of hexavalent chromium precipitation causedby heat treatment.
CRYOGENIC EQUIPMENT
Advantage
● lmprove the blade hardness and strength
● Improve the blade wear resistance
● lmprove the sharpness of the blade
● Improve the dimensional stability
