You may need to calculate the total HP-value of the following heat treatment cycle:
Start the program "Calculation of the Hollomon parameter" and enter the plate thickness: Select the heat treatment "Tempering". In this mode the program automatically calculates the heating- and cooling rate for a given thickness.
Enter the "Tempering condition" 710°C/30' by entering the holding temperature and the holding time. The resulting Hollomon parameter HP of this single heat treatment "Tempering" is shown in the same line after a <CLICK> in the green marked area.
Enter the "PWHT1" 680 °C/300' in the second line. Select the heat treatment mode "PWHT" with a default heating/cooling rate of 50 °C/h; this can be changed as in our expamle to 70 °C/h. After this you may enter the holding temperature and the holding time of the PWHT1 condition as already described for "Tempering" in the second step. As indicated before the calculated HP-value of the PWHT1 heat treatment is given in the same line after a <CLICK> in the marked area. The total Hollomon Parameter of the combined heat treatment meaning "Tempering" + "PWHT1" is indicated as HPtotal.
Enter the "PWHT2" condition exactly as described in the third step. The resulting picture is then the following. The calculated Hollomon parameter of the complete heat treatment cycle "T + PWHT1 + PWHT2" is given here as HPtotal.
You want to know the holding time which you have to choose for a tempering heat treatment with the following parameters:
Start the program and enter the plate thickness; choose the heat treatment mode "Tempering". As described in example 1, the heating- and cooling rates are calculated automatically when the plate thickness is entered.
Insert the Hollomon parameter 20.1 into the foreseen field, move the mouse to the green marked area and perform a <CLICK>
Insert the holding temperature 700°C.
After a <CLICK> in the blue marked area the program calculates the corresponding "holding time".
You want to know which holding temperature you have to choose for a tempering heat treatment with the following assumptions:
Start the program and enter the plate thickness. Choose the heat treatment mode "Tempering". The heating- and cooling rates are calculated automatically as described in example 1.
Enter the requested Hollomon Parameter 19.7 which should be achieved with the tempering into the foreseen field, move the mouse into the green marked area and perform a <CLICK>
Insert the time of 90 minutes.
After a <CLICK> within the blue marked field, the program calculates the corresponding holding temperature.
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