抄録
The quenching media used for large forgings of steel are mostly rape-seed oil, fish oil and water. Generally speaking, oils are excellent quenching media when fresh or when first used, but unfortunately their good char acteristics change with age and service.
The auther of this paper has investigated the relation between the hardening effect upon the heat treatment properties of steels and cbange in service of rape-seed oil.
And comes to the conclusion by the result of many tests that the rape-seed oil produces a better structure and has an extremely long life in service.
In addition to considering the characteristics of water and fish oil.
