The gear precision of the gear shaft is 10 and the machining modulus is 1.8, The structure of gear shaft after normalizing is: F+S for hypoeutectoid steel, S for eutectoid steel, S+ secondary cementite for eutectoid steel, and it is discontinuous.
When quenching and tempering, the whole section of the workpiece is required to be thoroughly quenched, so that the workpiece can get fine needle-like quenched martensite.
Determination of quenching holding time.
According to the effective length φ /2=80/2=40mm, it can be found that the insulation time should be more than 56min, in order to ensure the ideal tissue can be selected 1h.
Determine the quenching medium.
Product specification:
| modulus | 1.79 |
| number of teeth | 85 |
| tooth depth | 9.39 |
| tooth width | (44±0.1) |
| weight | 1.2kg-2.0kg |
| material | 8620H |
| appearance | circle |
| gear surface hardness | 58-63 |
| tooth line shape | involute |
| application | engineering machinery |
| product description: | engineering core components |
| accuracy of gear | 8-10 |
| processing module | 1.5-1.8 |
| gear type | involute external spline |
| materials | low carbon alloy steel |
| surface treatment | carburizing and quenching |
| processing technic | forging+machine work+heat treatment |
| fabricating machinery | mechanical press+digital controlled lathe+machining center |
| checkout equipment | Klingberg Gear Btesting Center+Zeiss CMM+Mitoyo contourgraph |
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Hypoeutectoid Steel Shaft Mechanical Engineering Modulus 1.8 Mechanical Shaft Images
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