Behavior analysis of quenching ununiformity by JIS-method cooling curve
- Idemitsu Kousan Co., Ltd., Chiba (Japan)
The authors measured cooling speed of quenching oil by JIS-Method cooling curve test which thermocouple was silver-alumel and that electromotive force was differentiated by differential calculus unit. From the results, the following things are found: (1) The authors measure a detailed cooling curve of the surface of a silver rod. These data show a surface like a vapor bubble. (2) Vapor film at the vapor blanket cooling stage was unstable if the quenching oil contains a liter component or water. (3) Carbon or Sludge on the metal surface effects not only brightness but also quenching nonuniformity because of delay for coming out of vapor bubbles at the vapor transport cooling stage. (4) In the case of Water born type quenching oil, at the vapor transport cooling stage, nonuniformity by unstable of bubble coming out is more happen compared to mineral type quenching oil.
- OSTI ID:
- 484252
- Report Number(s):
- CONF-961140-; TRN: 97:000168-0013
- Resource Relation:
- Conference: 2. international conference on quenching and the control of distortion, Cleveland, OH (United States), 4-7 Nov 1996; Other Information: PBD: 1996; Related Information: Is Part Of 2nd International conference on quenching and the control of distortion; Totten, G.E.; Howes, M.A.H.; Sjoestrom, S.J.; Funatani, Kiyoshi [eds.]; PB: 652 p.
- Country of Publication:
- United States
- Language:
- English
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