鉄系圧粉体の焼結時の寸法変化におよぼす黒鉛の特性の影響

• 高田 仁輔

  (株)神戸製鋼所

• 河合 伸泰

  (株)神戸製鋼所

書誌事項

タイトル別名

• Effect of Graphite Properties on Dimensional Change of Fe-Based Powder Compacts during Sintering.
• テツケイ アップンタイ ノ ショウケツジ ノ スンポウ ヘンカ ニ オヨボス

抄録

The effect of graphite properties on the dimensional change of Fe-2mass% Cu-0.8mass%C-0.75mass% zinc stearate was examined by using two kinds of natural graphite, flaky graphite of 0.5-35μm and amorphous graphite of 3-9μm. The compacts were sintered in endogas. Their sintering behaviors were correlated with the properties of graphite.<BR>As the size of graphite decreased, the compacts shrank and the dimensional change varied according to 0.27 log(B/A)% when graphite was replaced from A to Bμm. Finely divided flaky graphite showed a rapid carburization, which led to the acceleration of sintering and the suppression of copper growth. When flaky graphite was divided to 0.5μm, however, the dimensional change did not obey above formula at all. In this case, the compact expanded at the temperature ranging from about 150 to 450°C and the carburizing rate markedly decreased above 970°C, with a large fraction of the graphite remaining after sintering. Amorphous graphite of 9μm also showed a similar expansion in the early sintering stage, but the carburizing rate did not decrease. Such behaviors led to a remarkable shrinkage by liquid generation due to the ternary monotecto-eutectic reaction above the melting point of copper.

収録刊行物

• 粉体および粉末冶金

  粉体および粉末冶金 43 (3), 383-389, 1996

  一般社団法人 粉体粉末冶金協会

キーワード

• dimensional change
• iron based powder
• graphite
• sintering
• carburization

詳細情報

• CRID: 1390282681285795840
• NII論文ID: 10002011749
• NII書誌ID: AN00222724
• DOI: 10.2497/jjspm.43.383
• ISSN: 18809014
• ISSN: 05328799
• NDL書誌ID: 3936710
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I3936710
• 本文言語コード: ja
• データソース種別:
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  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可