Главная страница Случайная страница
Разделы сайта
АвтомобилиАстрономияБиологияГеографияДом и садДругие языкиДругоеИнформатикаИсторияКультураЛитератураЛогикаМатематикаМедицинаМеталлургияМеханикаОбразованиеОхрана трудаПедагогикаПолитикаПравоПсихологияРелигияРиторикаСоциологияСпортСтроительствоТехнологияТуризмФизикаФилософияФинансыХимияЧерчениеЭкологияЭкономикаЭлектроника
Contact and bending endurance limits
|
|
| Heat treatment | Tooth hardness | Gear material | 
| 
| |
| case | core and root | ||||
| Normalizing, martempering | Brinell 180 to 350 | Carbon and alloy steels, such as 45 (0.45C), 40X (0.40C-Cr), 40XH (0.40C-Cr-Ni), 50XH (0.50C-Cr-Ni), and 35XM (0.35C-Cr-Mo) | 
| 
| |
| Full hardening | Rockwell C, 40 to 55 | Carbon and alloy steels, such as 45 (0.45C), 40X (0.40C-Cr), 40XH (0.40C-Cr-Ni), and 35XM (0.35C-Cr-Mo) | 
| ||
| Surface hardening | Rockwell C, 40 to 58 | Rockwell C, 25 to 35 | Alloy steels, such as 40X (0.40C-Cr), 40XH (0.40C-Cr-Ni), 50XH (0.50C-Cr-Ni), and 35XM (0.35C-Cr-Mo) | 
| |
| Case hardening | Rockwell C, 54 to 64 | Rockwell C, 30 to 45 | Alloy steels, such as 20XH2M (0.20C-Cr-2Ni-Mo) | 
| |
| Nitriding | Rockwell C, 50 to 60 | Rockwell C, 24 to 40 | Alloy steels, such as 40XH2MA (0.40C-Cr-2Ni-Mo, quality) |  (of tooth core)
|
Determine the base number of stress cycles for the pinion 
and gear 
. For this purpose we use table 2.2.
Table 2.2
|
|