JP5925992B2 - 力学特性の評価方法 - Google Patents
力学特性の評価方法 Download PDFInfo
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- JP5925992B2 JP5925992B2 JP2011055499A JP2011055499A JP5925992B2 JP 5925992 B2 JP5925992 B2 JP 5925992B2 JP 2011055499 A JP2011055499 A JP 2011055499A JP 2011055499 A JP2011055499 A JP 2011055499A JP 5925992 B2 JP5925992 B2 JP 5925992B2
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Description
上記式(1)において、Cは定数である。また、押し込み力Fは、試験片の材料定数および圧子の幾何学形状、より具体的には複合ヤング率E*、加工硬化指数n、代表応力σr、頂角θおよび押し込み深さhの関数である。なお、頂角θは、図1および図2を参照して、稜間角φを有する三角錐圧子1の軸方向(押し込み方向)の投影面積と押し込み深さhとの比が等しくなる円錐圧子2の頂角θに対応する。さらに、E*に関しては、以下の式(2)が成立する。
Claims (8)
- 互いに異なる稜間角を有する複数の三角錐圧子を用いたインデンテーション法による鋼の力学特性の評価方法であって、
前記複数の三角錐圧子の稜間角は、いずれも115°以上であり、
前記鋼の硬度は50HRC以上である、力学特性の評価方法。 - 前記複数の三角錐圧子の稜間角は、いずれも119°未満である、請求項1に記載の力学特性の評価方法。
- 前記複数の三角錐圧子間の稜間角の差はいずれも1°以上である、請求項1または2に記載の力学特性の評価方法。
- 前記複数の圧子はダイヤモンドからなっている、請求項1〜3のいずれか1項に記載の力学特性の評価方法。
- 2つの前記三角錐圧子を用いて実施される、請求項1〜4のいずれか1項に記載の力学特性の評価方法。
- 表面硬化領域の力学特性が評価される、請求項1〜5のいずれか1項に記載の力学特性の評価方法。
- 前記表面硬化領域の硬度は50HRC以上である、請求項6に記載の力学特性の評価方法。
- 前記鋼は、高炭素クロム軸受鋼である、請求項1〜7のいずれか1項に記載の力学特性の評価方法。
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JP2014190009A Division JP2014232124A (ja) | 2014-09-18 | 2014-09-18 | 力学特性の評価方法 |
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JP2012189548A JP2012189548A (ja) | 2012-10-04 |
JP5925992B2 true JP5925992B2 (ja) | 2016-05-25 |
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JP2000249640A (ja) * | 1999-03-01 | 2000-09-14 | Nippon Steel Corp | 硬度測定装置 |
JP4958754B2 (ja) * | 2007-12-07 | 2012-06-20 | 株式会社ミツトヨ | 硬さ試験機及び硬さ試験機の校正方法 |
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