燒入鋼に於ける殘留オーステナイトの X 線的定量法に就いて (I)
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概要
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(1) Honda and Sekito's method of determination of residual austenite in quenched steel by means of X-ray analysis was improved, in order to apply it to the case of broad lines due to the quenching stress. (2) The relation between the tempering temperature and the quantity of the residual austenite in a high-carbon manganese steel quenched from 1050℃ was investigated. The result shows that the residual austenite in the surface layer is apparently less than in the interior caused by decarburation of the former, and that the true quantity of austenite is the same throughout the specimen. On heating, the residual austenite decomposes rapidly in the ranges 375∿425℃, vanishing completely at 450℃. (3) The present writer determined also the quantity of the austenites in the quenched steel by means of thermal expansion curves and coufirmed the above mentioned results obtained by X-ray analysis.
- 社団法人日本鉄鋼協会の論文
- 1943-07-25