오토저널 (Journal of the korean Society of Automotive Engineers)
- 제4권3호
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- Pages.24-39
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- 1982
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- 1739-4791(pISSN)
냉각수의 유동속도와 온도가 담금효과에 미치는 영향
The influence of flow rate and temperature on the quenching effect of cooling water
초록
It has already been known that quenching effect is influenced greatly by stirring and changing coolant's temperature on quenching. But according to the past investigations its effect has not been taken into consideration quantitatively in the cooling process. The purpose of this study is that the influence of flow rate and temperature on the quenching effect of cooling water as quenching medium is quantitatively examined by using the open channel. The stream of water in this study is turbulent flow. The temperature of the specimen made of pure copper is measured by CA thermocouple in the vicinity of the surface and recorded by an automatic recorder during the quenching process in city water. The results obtained are as follows; 1. The quenching effect of cooling water generally increases with Reynolds Number(characteristic length; specimen diameter)as shown in the experimental formula; but at the realm of Reynolds Number from 1.2 * 10
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