Powder Metallurgy Pinion
Powder metallurgy pinions are micro gear parts produced using powder metallurgy technology, using metal powders (commonly iron-based, copper based, stainless steel powders, etc.) as raw materials, through processes such as powder mixing, compression molding, sintering, and subsequent finishing/machining. The size is usually between a few millimeters and tens of millimeters, and is widely used in precision transmission scenarios.
- Product Introduction
product Details
|
Commodity |
Factory customized high precision strong wear resistance powder metallurgy pinion |
| Modular range | 0.1-2.0mm |
| Number of teeth range | 10-100 teeth |
| Outer diameter tolerance | ±0.01mm - ±0.03mm |
| Tooth surface roughness | Ra0.8-Ra3.2μm |
| Density | 6.0-7.2g/cm³ ( iron based ) |
| Tensile strength | 300-800MPa |
Core production process
• Powder mixing: Mix metal powder with lubricant and alloy element powder in proportion to ensure uniform composition and provide a foundation for subsequent molding .
• Compression molding: The mixed powder is compressed into gear blanks that are close to the final shape through high pressure in a dedicated mold, ensuring basic tooth profile and dimensional accuracy .
• Sintering: Heating in a protective atmosphere furnace to a temperature below the melting point of the metal, allowing the powder particles to form a dense metallurgical bond through atomic diffusion bonding, and obtaining stable mechanical properties .
• Post processing: Refine according to requirements (improve dimensional accuracy), machine (supplement complex structures), heat treatment (strengthen hardness), surface treatment (rust prevention, friction reduction) and other processes .
key advantage
• Controllable accuracy: The mold forming and finishing process can ensure that the tooth profile accuracy reaches levels 7-9 of GB/T 10095.1, meeting the requirements of precision transmission .
• High material utilization rate: Near net forming technology reduces material waste, with a material utilization rate of over 90%, far exceeding traditional cutting processing .
• Adjustable performance: By adjusting the powder composition and sintering process, gears with different strengths, hardness, and wear resistance can be customized to adapt to different working conditions .
• Low batch cost: suitable for large-scale automated production, the larger the batch, the more obvious the cost advantage of a single piece .
• Internal structure can be designed: It can produce self-lubricating gears containing oil, store lubricating oil in the pores, and achieve maintenance free or minimal maintenance .
Typical application scenarios
• Automotive field: engine valve timing system, seat adjustment motor, window lifting mechanism .
• Home appliance industry: washing machine clutch, air conditioning damper actuator, electric toothbrush transmission system .
• Office equipment: printer feed mechanism, copier developing component .
• Electric tools: handheld drill gearbox, garden tool transmission system .
Common Material Systems
| Material Type | Representative components | Hardness range | Applicable scenarios |
| Iron based powder metallurgy | Fe-Cu-C,Fe-Ni-C | HB120-300 | High load transmission, automotive components |
| Copper based powder metallurgy | Cu-Zn,Cu-Sn | HB60-150 | Low load, high wear resistance scenario |
| Stainless steel powder metallurgy | 304L,316L | HB150-250 | Corrosion resistance, food and medical fields |
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