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Care & Maintenance of Quenching Oil

What is Quenching?

Quenching is a critical part of manufacturing process for a heat treated part. The oil used for the heat treatment is quenching oil. We are going to understand about the common issues with quenching oil including contamination and filtration methods.

Contamination in Quenching Oil

Quenching oil can be divided into several categories, depending on their functional characteristics. Two such characteristics are quenching rate and operating temperature.
The major factors affecting the performance of quenching are:

1. Neutralization Number: The characteristics of quenching oils from different sources may vary. Oils can be alkaline or acid. Or they can vary due to additive content, refining procedures or deterioration during service.

2. Ash Content: The ash content of any quenching oil is a measure of the incombustible material that may be present. If a "soluble" quenching oil is not compounded with ash-forming additives, the ash content may indicate contamination.

3. Carbon Residue: "Carbon residue" is the carbonaceous residue formed after evaporation and pyrolysis of a petroleum product under conditions of insufficient oxygen.

4. Precipitation Number: The precipitation number of quenching oil is indicative of the presence of compounds, which will form sludge under operating conditions. This is a measure, like sludge, of the degree of aging in the oil.

5. Sludge: Sludge is a result of the oxidation and polymerization of quenching oils in use. The presence of sludge probably causes more problems in quenching than anything except the presence of water. The higher the sludge content, the more the particular oil has aged. 

Oil Recovery

All the above factors deteriorate the quenching oil during use, although most premium quenching oils can last more than 10 years when given reasonable use and care.
One such method is fine filtration and the use of a vacuum is the best way to remove residual water from the quench tank. 
The effects of contamination and oxidation of quench oil can cause significant changes in the maximum cooling rate and temperature of maximum cooling. This can result in increased part distortion, cracking, and non-uniformity of properties. A control program to monitor and track quench oil performance is necessary to insure quality parts and customer satisfaction.

Filtration benefits

High performance quench oil must have oxidation resistance or low sludge formation, be non-staining, an elevated flash point and have acceptable heat transfer characteristics. Contamination of quench oils is a very serious problem in most cases.

The oil filtration will provide:
  • Better quality / surface finish of the part (no blackening effect or cracking)
  • Reduced post quenching treatment of parts.
  • No loss of production due to manual cleaning of quench oil tanks.
  • Saving of quenching oil as thick quenching oil burns fast.
  • No distortion of parts after heat treatment.
  • Continuous centrifuging of quenching oil ensures quality of quenching oil same as new and reduces disposal cost.
  • Eliminates smoking.

Features of Centrifugal Filtration Machine for Quenching Oil

This is the stand-alone completely portable filtration cart fitted with motor and pump. It has 1 number centrifuge which has been specially designed and developed for quenching oil cleaning. The centrifuge can hold up to 15-20 kg of sludge.
The system has no recurring cost and no replacement component. It is absolutely maintenance and  expense free. Centrifuge requires periodic cleaning. Cleaning interval is fixed based on experience depending upon the degree of impurities present in quenching oil.
  • Available in process capacity from 1000 -10000 LPH
  • 100% consumable free
  • Zero wastage of oil
  • Sludge comes out in dry cake form (easy to dispose)
  • Easy to operate (any unskilled person can operate)
  • Compact in size (1 person can take it anywhere)
  • Fast Filtration Process
 

For more information regarding our product, feel free to contact us:
Toll Free Number: 1800-212-4645
Email: info@cbsenergy.com
Website: www.cbsenergy.com
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Location: H-5/6, Site V, UPSIDC Industrial Area, Greater Noida, Block S, Surajpur Site V, Greater Noida, Uttar Pradesh 201306, India

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