Temperature Gradient Quenching Analysis System (TGQAS)

About the method

It is a system designed to measure and records the heat extraction dynamics i.e. the quenching intensity when quenching real workpieces in workshop conditions. The main part of the hardware is the Liscic/Nanmac probe of 50 mm diameter and 200 mm length, instrumented with three thermocouples. The system is applicable to all kind of quenchants, to different quenching conditions and to all quenching techniques. It is nowadays the unique method enabling a real comparison among different quenchants, quenching conditions and quenching techniques.

Based on the heat flux density (W/m2) on the surface of the mentioned probe, different thermodynamic functions are calculated in every concrete test, and a detailed analysis of the quenching process, in respect of achievable depth of hardening, thermal stresses and the risk of crack formation, is possible. Two main benefits of using this system are:

  • The possibility to create Own Data Base of Quenching Intensities which the user is creating by performing quenching tests with the mentioned probe in his own quenching facilities, under different quenching conditions. By comparing data for different tests stored in his own data base, the user can select the optimal quenching conditions for his actual case.
  • The possibility to calculate the real heat transfer coefficient (W/m2K) as function of time as well as function of surface temperature being the first unavoidable step for every computer modelling of the quenching process.

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