Title:
HEAT-TREATMENT OIL COMPOSITION
Document Type and Number:
WIPO Patent Application WO/2019/189136
Kind Code:
A1
Abstract:
Provided is a heat-treatment oil composition that makes it possible to suppress quenching distortion and distortion variation and to achieve improved quenching hardness. A heat-treatment oil composition that includes a base oil (A) and a vapor film rupturing agent (B). The heat-treatment oil composition makes it such that, on a cooling curve obtained in accordance with the cooling performance test method in JIS K2242:2012, the time in seconds to 300°C, e.g., the cooling time from 800°C to 300°C, is at least 6.5 seconds but less than 10 seconds. Component (B) includes a petroleum resin.
Inventors:
HOMMA RIKKI (JP)
Application Number:
PCT/JP2019/012790
Publication Date:
October 03, 2019
Filing Date:
March 26, 2019
Export Citation:
Assignee:
IDEMITSU KOSAN CO (JP)
International Classes:
C21D1/58; C10M143/00; C10N20/02; C10N30/00; C10N40/20
Domestic Patent References:
| WO2016133093A1 | 2016-08-25 | |||
| WO2016132860A1 | 2016-08-25 | |||
| WO2007000976A1 | 2007-01-04 |
Attorney, Agent or Firm:
KOBAYASHI Hiroshi et al. (JP)
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