書誌事項
- タイトル別名
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- On the Hardening of W-Co Deposit by Nitriding and the Cause of Crack Formation in Deposit on Heat Treatment
- W-Co メッキ ノ チッカ ニ ヨル コウカ オヨビ ネツ ショリ ニ トモナウ ワレ ノ ハッセイ ゲンイン ニ ツイテ
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Nitriding in ammonia gas was applied to W-Co layer (36 wt%W) electrodeposited on mild steel to increase its hardness at a temperature lower than the temperature of hardening by carburizing or heating in vacuum. Consequently, the value of 1200 Hv was obtained by nitriding at 700°C or 800°C for 30 minutes, but such high value of hardness could not be obtained at lower temperature. In the case of this hardening the precipitation of β W2N was found to take place in α Co. Next, fine cracks were formed in W-Co deposit on mild steel when it was heated above 400°C. In order to disclose the cause of this cracking the volume of gas released from the deposit by heating and the thermal expansion of the deposit were measured. An abnormal shrinking of the deposit was observed during the heating from 400°C to 690°C and it created cracks in the deposit. This shrink seemed to be produced by the ordering transformation of α Co→Co3W in deposit.
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 25 (5), 353-357, 1961
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
- 1390001206482928512
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- NII論文ID
- 130007334789
- 40018257918
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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
- 9153358
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- データソース種別
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- JaLC
- NDL
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- 使用不可