Powder Metallurgy of High Density Gear Wheel
The gear wheel, like the clutch, is a typical generation of adjustable arm accessories, it is made of pre-alloyed steel. In order to ensure the strength of product, we add a certain amount of diffusion alloyed steel to the powder. (The clutch ring is made of this material too) to our company for over 10 years generation slack adjuster of powder metallurgy parts, has a very mature experience, The quality is widely recognized by customers, we are now a more than 70% of The generation of slack adjuster manufacturers for this product. The shipping capacity of each month is over 700 thousand.
What is Powder Metallurgy?
Powder metallurgy is a process for forming metal parts. There are three steps in the process:
Mixing the metal powders
Compacting the powders to the desired shape
Heating the compacted shape under controlled conditions
The end result is a metal part that is nearly identical to the desired shape and requires little or no machine finishing, depending on the level of precision needed.
Technical Parameter
1. Gear No.:32
2. Mould:1
3. Pressure angle:20°
4. Cross teeth:4
5. Base tangent length:10.78±0.05
6. Weight:31g
7. Density:>7.0g/cm³
8. Heat treatment hardness: 43-50HRC
Process Flow
Mixing→2.Pressing→3.Sintering→4Heat treatment→5.Polishing→Ultrasonic cleaning→Surface grinding→Ultrasonic cleaning→6.Oil pregnation→7.packaging.
Advantages and Disadvantages of Powdered Metal Gears
The primary reason that powdered metal gears may be preferred over more traditional gear materials is cost. In large production quantities, it is less expensive to manufacture a gear made of powdered metal than a gear made of iron or steel. First, less energy is used during manufacture, and there is also very little material waste. The manufacturing cost is also generally less when considering that many powdered metal parts do not require very much, if any, machine finishing.
Other features that make powdered metal appealing have to do with its material structure. Due to the porous composition of powdered metal gears, they are lightweight and typically run quietly. Also, the powder material can be uniquely mixed, producing unique characteristics. For gears, this includes the opportunity to impregnate the porous material with oil, resulting in gears that are self-lubricated.
There are some drawbacks to powdered metal gears, however. One of the most significant is that powdered metal is not as strong, and also wears more quickly than other materials. There are also size limitations when using powdered metal materials to maintain both manufacturability and effectiveness of the gear. It is also generally not cost efficient to produce powdered metal gears in low to medium sized production quantities.
