| 許容ヘルツ応力 |
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| ●浸炭焼入れ[参考:KHKカタログ] |
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| 材料[参考] |
有効浸炭深さ |
歯面の硬さ |
σh |
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| Hv |
N/mm2 |
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| 構造用炭素鋼 |
S15C S15CK |
比較的浅い場合 注(1)A |
580 |
1127 |
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| 600 |
1147 |
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| 620 |
1156 |
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| 640 |
1166 |
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| 660 |
1176 |
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| 680 |
1176 |
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| 700 |
1176 |
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| 720 |
1166 |
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| 740 |
1156 |
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| 760 |
1147 |
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| 780 |
1127 |
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| 800 |
1107 |
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| 構造用合金鋼 |
SCM415 |
SCM420 |
SNCM420 |
SNC415 |
SNC815 |
比較的浅い場合 注(1)A |
580 |
1284 |
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| 600 |
1313 |
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| 620 |
1343 |
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| 640 |
1352 |
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| 660 |
1352 |
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| 680 |
1352 |
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| 700 |
1352 |
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| 720 |
1343 |
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| 740 |
1333 |
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| 760 |
1313 |
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| 780 |
1294 |
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| 800 |
1274 |
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| 比較的深い場合 注(1)B以上 |
580 |
1529 |
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| 600 |
1568 |
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| 620 |
1607 |
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| 640 |
1627 |
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| 660 |
1627 |
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| 680 |
1627 |
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| 700 |
1607 |
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| 720 |
1578 |
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| 740 |
1548 |
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| 760 |
1509 |
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| 780 |
1470 |
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| 800 |
1431 |
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| 注(1) |
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| 有効浸炭深さの比較的浅い場合とは下表のA程度の場合をいい、比較的深い場合とは |
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| B程度以上の場合をいう。有効浸炭深さはHv513(HRC50)の硬さまでの深さとする。 |
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| なお、研削歯車においては研削後の深さとする。 |
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| モジュール |
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1.5 |
2 |
3 |
4 |
5 |
6 |
8 |
10 |
15 |
20 |
25 |
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| 深さ(mm) |
A |
0.2 |
0.2 |
0.3 |
0.4 |
0.5 |
0.6 |
0.7 |
0.9 |
1.2 |
1.5 |
1.8 |
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| B |
0.3 |
0.3 |
0.5 |
0.7 |
0.8 |
0.9 |
1.1 |
1.4 |
2.0 |
2.5 |
3.4 |
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