書誌事項
- タイトル別名
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- Martensite Transformation of Carbon Steel Powders Produced by Electro-Spark Machining
- ホウデン カコウ ノ サイ ニ ショウジタ タンソ コウフンマツ ノ マルテンサイト ヘンタイ
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Fine particles of carbon steel containing 0.9 and 1.4% carbon were made by electro-spark machining, in which a simple R-C resonance circuit was used, the voltage being 100 volts, R 100 Ω and C 2 or 16 μF. The insulating liquid was transformer oil or ethanol. The size and structures of the produced particles were examined by means of electron microscopy and X-ray diffraction with the following results: The size was about 0.01 μ in diameter, which was independent of the condition of machining and of the carbon content. In the Debye-Scherrer photographs, a stronger but somewhat diffused pattern of austenite was seen while that of martensite was weaker compared with the case of bulk steels. This fact indicates a suppression of martensite transformation, which is interpreted to be due to the following two effects: The surface effect coming from the small particle size of about 0.01 μ, and the effect of the cooling with an extremely rapid cooling rate probably from a very high temperature as approximating boiling point of steel.
収録刊行物
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- 日本金属学会誌
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日本金属学会誌 23 (12), 728-731, 1959
公益社団法人 日本金属学会
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詳細情報 詳細情報について
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- CRID
- 1390282681458844800
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- NII論文ID
- 130007333769
- 40018257362
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- NII書誌ID
- AN00187860
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- ISSN
- 18806880
- 24337501
- 00214876
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- NDL書誌ID
- 9152802
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- データソース種別
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- JaLC
- NDL
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