Tempering:
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Tempering must be carried out within one hour from hardening(warm part)
in the range 550-630°Cfor 4-6 hours according to hardness required, the
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dimensions of the parts and operating conditions.
1. (55NiCrMoV7) QT tool steel is used in the production of stainless-steel goods, multipart press molds, punch dies for extrusion presses, support holders for seal carriers, casings, and protective jackets.
In applications requiring higher hardness, 1. soft-tempered material can be used after hardening.
If you are looking for more details, kindly visit 1. steel.