Powder metallurgy gear manufacturers tell you that powder metallurgy is a new type of net near-molding technology. It performs the required mold forming by melting, heating, injecting and pressing metal powder.  So what factors affect the quality of auto parts powder metallurgy press forming? Let's take a look at the Powder metallurgy gear manufacturers below.

The influencing factors are as follows:
1. The influence of the press forming die
Powder metallurgy gear manufacturers tell you that the importance of molds to press forming technology is self-evident. It is recommended to use female molds or mandrels made of cemented carbide, powdered high-speed steel and other materials. diameter, etc.), the smaller the surface roughness, the better to reduce the friction factor between the powder particles and the die wall.
Powder metallurgy gear manufacturers tell you that if it is a relatively large or complex compact, long-term pressing will cause the female mold to heat and deform, and a water cooling device can be used to cool the female mold cyclically and reduce the friction factor.
Moreover, in the design of the negative mold, it is necessary to focus on strength and rigidity, which can reduce the degree of thermal deformation of the negative mold, reduce the pressure loss, and prevent cracks and other problems during the pressing of automobile parts.
2. The influence of mold and lubricant
Powder metallurgy gear manufacturers tell you that in the process of powder metallurgy press forming of automobile parts, due to the pressure loss caused by the friction between the mixed powder and the die wall, the density distribution of the green compact is uneven. Minxin powder recommends using a high hardness die or a better lubricant.
3. The effect of lubricants
Adding a lubricant to the metal mixed powder can effectively reduce the friction between the powders and between the powder and the die wall, so that the density distribution of the compact is more uniform. Powder metallurgy gear manufacturers tell you that the commonly used lubricant is zinc fatty acid. Although it can improve the pressing and forming conditions, due to the low bulk density, segregation is easy to occur after mixing, and the sintered parts are prone to problems such as pitting.
Using a good lubricant can effectively improve the friction between the powder and the die wall, and greatly reduce the density error of the green compact. In terms of powder mixing, attention should also be paid to the powder mixing method, which can also reduce friction.
4. Influence of Compression Parameters
(1) Pressurization speed
If the pressing speed is too fast, it will affect the uniformity of the density of the compact, and it will also cause cracks. It is better to use a hydraulic powder forming machine to produce it.
(2) Holding time
Under relatively large pressing pressure and holding pressure for an appropriate time, the density of powder metallurgy compacted compacts of automobile parts can be significantly improved.
(3) The structure of powder feeding boots
Powder metallurgy gear manufacturers tell you that if the general powder feeding shoe is used for powder loading, the powder filling will be uneven at the top and bottom of the cavity or around the front and back, which will affect the quality of the compact. Improving or redesigning the powder feeding shoe can improve the uniform powder loading. sexual issues.
To sum up, this is what Powder metallurgy gear manufacturers share with you today. If you want to know more about it, please pay attention to our official website.