Tetsu-to-Hagane
Online ISSN : 1883-2954
Print ISSN : 0021-1575
ISSN-L : 0021-1575
On the Deterioration of Quenching Oils by Heat Decomposition
On the deterioration of quenching oil-V
Masayosi TagayaImao TamuraMitsugu Tanaka
Author information
JOURNAL FREE ACCESS

1960 Volume 46 Issue 4 Pages 483-487

Details
Abstract

In N2 atmosphere, a Ni-Cr wire coil which was resistance-heated to about 900°C is repeatedly, and quenched into. the quenching oils every 60 s.. The heating coil of 30mm dia., and 40mm length was made of a 3. 2mm dia., 800mm long Ni-Cr wire.
This testing apparatus was newly deviced and built in oder to carry this experiment efficiently and reasonably in the condition nearest to the practical hardening operation.
The examined oils were (1) pure mineral oil (2) fatty oil and (3) mineral oil added with 10% polymerized heavy hydrocarbon to increase the cooling ability. The quenching oil bath contained 2l of oil to be examined, which was circulated at the rate of 10l/mn. through the cooling system and the oil temperature was held at about 30°C. After the repeated quenching tests of 4, 6, 10, 20, 30, 60 and 90 h, the properties of oils were determined.
As the conclusion, through the all kinds of oils examined, concerning to the cooling ability of quenching oil, the deterioration was remarkably less than that by oxidation and polymerization previously reported by the author but the lowering of the flash point was characteristically remarkable.

Content from these authors
© The Iron and Steel Institute of Japan
Previous article Next article
feedback
Top