Quenchometer -Cooling Curve Method

Product Description

Quenchometer Cooling Curve Method Cooling characteristics of quenchant cooling curve analysis  ASTM D 648206Tensi Agitator Method

The Quenchometer is a PC based completely automatic testing apparatus to determine the cooling characteristics of aqueous polymer quenchant as per ASTM D 648206The apparatus is operated from a host PC running our windows based dedicated software and is capable of monitoring displaying the cooling curve in REAL TIME apart from a host of other features as describe below Building blocks

  Muffle Furnace A vertical furnace with digital read out with a central hole for the thermocouple capable of holding a temperature of 850oC  2oC for at least 1 minute 

  Thermocouple and handle A special K Type thermocouple probe as per ASTM standard having dimensions Diameter125mm after grind finish with a central hole of 15mm and a length of 66mm 

  Tensi Agitator Bath Cooling Curve Analysis Tensi Agitator The Quenchant is stored in a special container as per ASTM guidelines with a partition The Quenchant is agitated by a propeller driven by a variable speed DC Motor the RPM is controlled to have specified flow rate of agitation 

Operating Procedure

The thermocouple is heated in the bath and needs to be quickly dipped into the bath

As soon as the probe is dipped into the Quenchant the data acquisition system starts data acquisition and dumps the data into a matrix on the hard disc recording temperature 10C and time in 1second and displays in Real Time

i Temperature vs time

ii Temperature vs cooling rate 

After the temperature reaches 200o100o C or as preset by the operator the data acquisition stops The temperature can be set to any other value as desired by the operator

The operator may stop the data acquisition after the elapsed time of 60 seconds The computer stops and end of experiment is displayed

Details of the graphs plotted

Two graphs are plotted on the screen which can be printed on demand

i Temp vs Time graph Y axis temperature falling in 10 C and X axis is time in 1second To arrive at any temperature place the mouse cursor at any point of the curve displays the temperature and time values at that point The following information will also be displayed 

Time to cool to 600o C  400o C and 200o C

ii Temp vs cooling rate graph This graph plots the cooling rate vs temperature and has the same feature like above to read the data at any point with a cursor move  The following data will be calculated and displayed over and above this graph

Maximum cooling rate o C  Sec

Temperature where the max cooling rate occurs

Cooling rate at 300o C

 Cooling characteristics of quenchant Cooling Curve Analysis ASTM D 62001

The system and the Operating Procedure is similar to the previous system as far as thermocouple probe and muffle furnace is concerned The only change is the sample bath as mentioned below

Quenchant sample containerCooling Curve Analysis The Quenchant sample container is as per ASTM D62001 Section 75 is made of heat proof damage proof tall form vessel ID  115  5mm capable of holding 2000  50 ml of liquid with adequate free space