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Four fires in heat treatment of plastic injection mold
May 21, 2018

"Four fires" in heat treatment of plastic mold:

Different mold steels have different Quench hardening. The quenching is to heat the workpiece to heat and keep it cool in the quenching medium such as water, oil or other inorganic salts and organic water solution.The steel is hardened after quenching, but it is brittle at the same time.In order to reduce the brittleness of steel after quenching of steel is higher than the room temperature and under 650 ℃ at some stage in the proper temperature for a long time of heat preservation, again for cooling, this process is called tempering.Annealing, normalizing, quenching and tempering are the "four fires" in the whole heat treatment, and the quenching and tempering are closely related to each other, which is often used in conjunction with the fire.


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