Quenching lubricants are also known as Heat Treatment lubricant. These lubricants are used to quench ( cooling ) hot components ( mainly ferrous ) at a desired and controlled environment to achieve certain molecular structure, which will exhibit predetermined properties or qualities.
In a simple word the quenching process is a process where the hot components are dipped in a quenching lubricant bath for a certain period of time to achieve a desired surface quality of the component.
Quenching lubricants are classified as
I.Fast Quenching lubricant
II.Medium quenching lubricant
III.Slow quenching lubricant
depending upon the cooling rates of the grade which can be ascertained by the cooling curve of the particular grade.
The grades in Express range are as follows:
I.Express MQ 18 – This is a Fast quenching lubricant with cooling rate up to 16 sec.
II.Express MQ 27 – This is a medium quenching lubricant with cooling rate up to 20 sec.
III.Express MQ 36 – This is a slow quenching lubricant with cooling rate up to 35 sec.
The above grades performance are as per IS: 2664-1980.