Heat treatment oil composition

Details Heat treatment oil composition Heat treatment oil composition

2011-08-09

2011-08-09

Ward, Jessica L (Department: 1735)

Metal treatment

Compositions

Heat treating

C208S014000

Reexamination Certificate

active

07993473

ABSTRACT:
The heat-treating oil composition of the present invention is characterized by comprising a mixed base oil containing a low-boiling base oil having a 5% distillation temperature of from 300 to 400° C. in an amount of not less than 5% by mass but less than 50% by mass, and a high-boiling base oil having a 5% distillation temperature of 500° C. or higher in an amount of more than 50% by mass but not more than 95% by mass. There is provided a quenching oil composition capable of exhibiting a less fluctuation in hardness or quenching distortion of a metal material treated therewith even when a large number of the metal materials are quenched therewith at the same time.

REFERENCES:
patent: 2003/0201205 (2003-10-01), Ichitani et al.
patent: 2004/0014617 (2004-01-01), Koga et al.
patent: 10-158677 (1998-06-01), None
patent: 2001-192689 (2001-07-01), None
patent: 2002-327191 (2002-11-01), None

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