Standard Test Method for Determination of Cooling Characteristics of Aqueous Polymer Quenchants by Cooling Curve Analysis with Agitation (Tensi Method)

SCOPE
1.1 This test method covers the equipment and the procedure for evaluation of quenching characteristics of a quenching fluid by cooling rate determination.
1.2 This test method is designed to evaluate quenching fluids with agitation, using the Tensi agitation apparatus.
1.3 The values in SI units are to be regarded as the standard. The values in parentheses are for information only.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

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09-Dec-2001
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ASTM D6482-01 - Standard Test Method for Determination of Cooling Characteristics of Aqueous Polymer Quenchants by Cooling Curve Analysis with Agitation (Tensi Method)
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn. Contact ASTM
International (www.astm.org) for the latest information.
An American National Standard
Designation:D6482–01
Standard Test Method for
Determination of Cooling Characteristics of Aqueous
Polymer Quenchants by Cooling Curve Analysis with
1
Agitation (Tensi Method)
This standard is issued under the fixed designation D 6482; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
5
1. Scope 2.4 Wolfson Engineering Group:
Laboratory Tests for Assessing the Cooling Curve of Indus-
1.1 This test method covers the equipment and the proce-
trial Quenching Media
dure for evaluation of quenching characteristics of a quenching
fluid by cooling rate determination.
3. Terminology
1.2 This test method is designed to evaluate quenching
3.1 Definitions of Terms Specific to This Standard:
fluids with agitation, using the Tensi agitation apparatus.
3.1.1 aqueous polymer quenchant—an aqueous solution
1.3 ThevaluesinSIunitsaretoberegardedasthestandard.
containing a water soluble polymer; typically including poly-
The values in parentheses are for information only.
(alkylene glycol), poly(ethyl oxazoline), poly(solium acrylate)
1.4 This standard does not purport to address all of the
6
andpoly(vinylpyrrolidone)(1,2). Thequenchantsolutionalso
safety concerns, if any, associated with its use. It is the
typically contains additives for corrosion and foam control, if
responsibility of the user of this standard to establish appro-
needed. Quench severity of aqueous polymer quenchants is
priate safety and health practices and determine the applica-
dependent on concentration and molecular weight of the
bility of regulatory limitations prior to use.
specific polymer being evaluated, quenchant temperature, and
2. Referenced Documents agitation rate as shown in Figs. 1-3 respectively.
2
3.1.2 cooling curve—a graphical representation of the cool-
2.1 ASTM Standards:
ing time (t)-temperature (T) response of the probe (see 7.3).An
D 6200 Test Method for Determination of Cooling Charac-
example is illustrated in Fig. 4a.
teristics of Quench Oils by Cooling Curve Analysis
3.1.3 coolingcurveanalysis—theprocessofquantifyingthe
E 220 Test Method for Calibration of Thermocouples by
coolingcharacteristicsofaquenchantbasedonthetemperature
Comparison Techniques
versustimeprofileobtainedbycoolingapreheatedmetalprobe
E 230 Specification and Temperature-Electromotive Force
assembly (see Fig. 5) under standard conditions (1,3,4).
(EMF) Tables for Standardized Thermocouples
3
3.1.4 cooling rate curve—obtained by calculating the first
2.2 SAE Standard:
derivative (dT/dt) of the cooling time-temperature curve. An
AMS5665 NickelAlloyCorrosionandHeatResistantBars,
example is illustrated in Fig. 4b.
Forgings and Rings
4 3.1.5 quenchant—any medium, liquid or gas that may be
2.3 Japanese Industrial Standards:
used to mediate heat transfer during the cooling of hot metal.
JIS K 2242 Heat Treating Oil
3.1.6 quench severity—the ability of a quenching medium
JIS K 6753 Di-2-ethylhexyl Phthalate
to extract heat from a hot metal (5).
4. Summary of Test Method
1
This test method is under the jurisdiction of ASTM Committee D02 on
4.1 The nickel alloy probe assembly’s cooling time versus
Petroleum Products and Lubricants and is the direct responsibility of Subcommittee
temperature is determined after placing the assembly in a
D02.L06 on Nonlubricating Process Fluids.
Current edition approved Dec. 10, 2001. Published February 2002. Originally furnace and heating to 850°C (1562°F) and then quenching
published as D 6482 - 99. Last previous edition D 6482 - 99.
into an aqueous polymer quenchant solution. The temperature
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
5
the ASTM website. Wolfson Engineering Group Specification, available from Wolfson Heat
3
Available from Society of Automotive Engineers, 400 Commonwealth Dr., Treatment Centre,Aston University,AstonTriangle, Birmingham B4 7ET, England,
Warrendale, PA 15096. 1980.
4 6
Available from Japanese Standards Association, 1-24, Akasaka 4, Minato-ku, The boldface numbers in parentheses refer to the list of references at the end of
Tokyo 107 Japan. this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn. Contact ASTM
International (www.astm.org) for the latest information.
D6482–01
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