LQD Data structure

The LQD stores the following information of each Cooling Curve:


  • Cooling Curve, T(t)
  • Cooling Rate Curve, CR(t)
  • Name of the Cooling Curve
  • Date of Cooling Curve Acquisition
  • Type of Cooling Curve Acquisition (ISO9950, JIS, Liscic, Other)
  • Medium type (Cold Oil, Warm Oil, Hot Oil, Water, Polymer solution, Gas, Spray, Salt, Other)
  • Type of Application (Immersion Quenching, Mar-Tempering, Vacuum, Induction, Other)
  • Product’s Name
  • Manufacturer of Product
  • Product Application Temperature (Min.) [C]
  • Product Application Temperature (Max.) [C]
  • Maximum Peak Temperature, Celsius (Flash Temperature -60C) [C]
  • Concentration of additives (wt%) [%]
  • Temperature of quenchant, [C]
  • Agitation of the quenchant [m/s]
  • Agitation remarks
  • Viscosity at 40C, [mm2/s]
  • Flashpoint Temperature (COC), [C]
  • Maximum of Cooling Rate (CRmax) [C/s]
  • Temperature at Maximum of Cooling Rate (TCRmax) [C]
  • Time at Maximum of Cooling Rate (tCRmax) [s]
  • Time to 700C (Time to cool down to 700C) [s]
  • Time to 600C ([Time to cool down to 600C) [s]
  • Time to 500C (Time to cool down to 500C) [s]
  • Time to 400C ([Time to cool down to 400C) [s]
  • Time to 300C (Time to cool down to 300C) [s]
  • Cooling Rate at 700C [C/s]
  • Cooling Rate at 600C [C/s]
  • Cooling Rate at 500C [C/s]
  • Cooling Rate at 400C [C/s]
  • Cooling Rate at 300C [C/s]
  • Theta 1 (Transition temperature between vapour and boiling phase) [C]
  • Theta 2 (Transition temperature between boiling and convection phase) [C]