Quenchometer Cooling Curve Method -Cooling characteristics of quenchant cooling curve analysis - ASTM D 6482-06(Tensi 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 6482-06.The 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:
ü 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.
ü Thermocouple and handle: A special K Type thermocouple probe as per ASTM standard having dimensions: Diameter:-12.5mm (after grind finish) with a central hole of 1.5mm and a length of 66mm.
ü 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.
i. Temperature v/s time.
ii. Temperature v/s cooling rate.
Details of the graphs plotted
Two graphs are plotted on the screen, which can be printed on demand
i. Temp v/s 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
ii. Temp v/s cooling rate graph: This graph plots the cooling rate v/s 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
Cooling characteristics of quenchant Cooling Curve Analysis ASTM D 6200-1
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 container(Cooling Curve Analysis): The Quenchant sample container is as per ASTM D6200-1, Section 7.5, 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.