Fri, 08 Jun 2018 03:01:59 +0000
Vacuum heat treatment process
The development of heat treatment is accompanied by the development of machinery manufacturing industry.
As is known to all, mould heat treatment is to give full play to the potential of mould materials and improve the performance of mould. The performance of the mold must be satisfied: high strength, (including high temperature strength, cold and hot fatigue resistance) of high hardness, wear resistance and high toughness, and it also requires good machinability, (including polishing) good weldability and corrosion resistance, etc.
The biggest impact on the die life is the design of the die (including the correct material selection), the material of the die, the heat treatment of the die, the use and maintenance of the die, etc. If the mold design is reasonable and the material is high quality, then the heat treatment directly determines the service life of the mold. At present, both at home and abroad are trying to adopt more advanced heat treatment methods to improve the performance of the mold and extend the service life of the mold. And vacuum heat treatment is the mold heat treatment one of the more advanced way of mold heat treatment process, adopted by the process parameters on the performance of mould also has a crucial impact: it includes heating temperature, heating rate, holding time, cooling, cooling speed, etc. Correct heat treatment process parameters can ensure the best performance of the mold, otherwise, it will produce bad or even serious consequences. Practice shows that the correct heat treatment process can obtain good organization, good organization shape can guarantee good mechanical performance. The deformation and cracking of the mould during heat treatment can be effectively controlled by proper technology. From practice found that the mold in the process of heating and cooling, mould and center temperature of the surface temperature difference of non-uniformity (heating and cooling non-uniformity) is the main factor that causes the deformation of mould. The vacuum furnace has the ability to control the heating speed and cooling speed. Different processing methods can make the mould meet different conditions of use and different performance requirements.