冷間鍛造用超硬合金の曲げ疲労特性

• 阪上 楠彦

  ダイジェット工業（株）

• 河野 信一

  ダイジェット工業（株）

• 山本 勉

  ダイジェット工業（株）

書誌事項

タイトル別名

• Bending Fatigue Characteristics of Cemented Carbides for Cold Forging Tools
• レイカン タンゾウヨウ チョウコウゴウキン ノ マゲ ヒロウ トクセイ

抄録

It is very important to acquire knowledge on bending fatigue characteristics of cemented carbides tools for cold forging, because the tools are generally applied under strong repeated stress at their use. In this study, the effects of grain size of WC and Co content on the bending fatigue characteristics were mainly investigated for fine and coarse-grained WC-0.5∼1.0mass%Cr₃C₂-10∼22mass%Co alloys and the relation between transverse-rupture strength and fatigue limit was discussed.<BR>The results obtained were as follows: (1) The bending fatigue limit of fine-grained WC alloys was higher than that of coarse-grained WC alloys and that of low Co alloys was higher than that of high Co alloys in each WC grain size. This tendency was similar to the case of transverse-rupture strength. (2) The fracture origin observed in low cycle range was mostly aggregated WC, while that in high cycle range above 10⁵ cycles showed tendency to change Co pool or its segregation. (3) There was a very strong correlation between transverse-rupture strength and bending fatigue limit, and 45∼55% of the transverse-rupture strength was equivalent to the bending fatigue limit. This relation enables to estimate the fatigue limit of cemented carbides.

収録刊行物

• 粉体および粉末冶金

  粉体および粉末冶金 54 (4), 260-263, 2007

  一般社団法人 粉体粉末冶金協会

キーワード

• cemented carbides
• cold forging
• bending fatigue limit
• transverse-rupture strength

詳細情報

• CRID: 1390001206307619200
• NII論文ID: 130000057987
• NII書誌ID: AN00222724
• DOI: 10.2497/jjspm.54.260
• COI: 1:CAS:528:DC%2BD2sXlt1ylurg%3D
• ISSN: 18809014
• ISSN: 05328799
• NDL書誌ID: 8799035
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I8799035
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可