THERMISOL BMP is a synthetic fluid specially developed for hardening operations after inductive heating or torch hardening. For some materials, the exact degree of hardness can be obtained by varying the concentration of the solution. THERMISOL BMP is particularly resistant to bacterial or fungal
attack and offers good protection. This polymer Quenching Oil is specially designed to resolve metallurgical problems and complies with pollution, hygiene and safety-at-work legislation.
Benefits of using THERMISOL BMP
Prevents stress cracks
Ensures consistent hardness
Free of nitrites and phenols
Non-flammable
THERMISOL BMP reduces manufacturing costs:
By eliminating rejects
By utilizing low-concentration solutions
By reducing consumption.
Typical Physical & Chemical Characteristics:
Properties
Unit
Value
Norm Test
Density at 15 °C
kg/l
1.044
ASTM D 1298
Colour
2.5
ASTM D 1500
Viscosity at 20 °C
mm²/s
71
ASTM D 445
Viscosity at 40 °C
mm²/s
34
ASTM D 445
pH-value of the solution DIN water 10%
8.9
DIN 51 369
Reserve Alkalinity up to pH = 7
ml 0,1 n HCl
28
FLP*
Refractometer / Fluid Tester factor
2.4
FLP*
FLP*= FUCHS Laboratory Procedure
Application:
THERMISOL BMP should be diluted with water to concentrations ranging from 2 to 30 %.
Quenching Oil mixing:
Tanks which have previously contained quenching oils should be thoroughly cleaned, proceeding with scouring and rinsing to avoid excessive contamination. Fill the tank with 3 parts of water if the concentration is 25 % and immediately add 1 part THERMISOL BMP. Stir the solution, check the concentration and adjust by adding small amounts of product or water. For optimum mixing, heat the solution to 40 - 60 °C and stir thoroughly.
Quenching operations can now begin.
Caution!
Clean parts that have been heated in bath salts prior to quenching.
Do not quench tool steels.
The temperature of the bath should not exceed 65 °C.
If complex-shaped parts with difficult cooling characteristics are being quenched, adjust the THERMISOL BMP concentration accordingly.
THERMISOL BMP bath (concentration) control:
Hand refractometer. Since the refraction index of solution varies with concentration, this is a useful means of measurement. Filter a solution sample and place a drop on the lens, close the cover and look through the eye-piece with the instrument pointing at a light. Having determined the reading which corresponds to the shaded area observed in the eye piece, multiply by a factor of 2.4 and this will give the direct concentration of the bath, e.g. Refractometer reading = 7; Calculation: 2.4 x 7 = 16.8 % of THERMISOL BMP.
Another simple procedure consists of heating a defined quantity of the Quenching Oil in a graduated test tube. A film will then separate and float to the top of the solution. This film is then measured and compared to the results of similar tests on standard solutions.
Further information:
Handling: No special precautions need to be taken when handling THERMISOL BMP.
It is advisable to test bacteria levels regularly because microbiological growth in aqueous solutions has a direct bearing on corrosion problems.