What factors are related to the wear resistance of powder metallurgy?

What factors are related to the wear resistance of powder metallurgy?

With the progress of modern technology, the output value of the national powder metallurgy industry is increasing at a high speed every year, especially in the automotive industry, machinery manufacturing, metal industry, aerospace, instrumentation, hardware tools, engineering machinery, electronic appliances and high-tech industries. The use of powder metallurgy technology not only ensures the strength and hardness of these manufacturing machine parts, but also has a certain degree of wear resistance, ensuring the service life of products. As can be seen, the requirements for wear resistance in powder metallurgy are relatively high. Do you know what factors are related to the wear resistance of powder metallurgy? Here is a brief introduction of the Zhongwei Precision Editor:

powder metallurgy

The wear resistance of powder metallurgy is related to the following factors:

1. Chemical elements:

The amount of chemical elements in powder metallurgy affects the increase or decrease of wear resistance. Elements that can strengthen the matrix and generate hard compounds can improve the wear resistance of iron base powder metallurgy parts; The addition of S, Sn, Mn, Mo, Cu, P, RE, etc. can improve the wear resistance of the material.

2. Alloying elements:

MM200 wear tester is used to test the ability of the material to resist adhesive wear. Under this wear condition, the wear resistance is completely determined by the nature of the material itself, and the addition of an appropriate amount of alloy elements has a great impact on the wear resistance. After the iron base material is sintered, ferrite and pearlite structures are generally obtained. The ferrite is soft and has poor wear resistance, while the pearlite has good wear resistance, increased carbon content, increased pearlite, and increased wear resistance.

3. Relationship between abrasion resistance and hardness:

The hardness and wear resistance have no certain regularity in the adhesive wear process, which may be due to the dominant role of matrix strengthening in wear resistance. If the strength and hardness of the matrix can be improved or both can be improved, the wear resistance of the material will be increased. However, the wear resistance of sintered iron base materials is not only related to the materials themselves.

4. Process performance and economy:

When selecting materials, in addition to the wear resistance, the processing technology and economy should also be considered to achieve a good cost performance. Fe-C-Mn material has poor processability. Although it has good wear resistance, it is difficult to machine parts, so the process should be strictly followed in use.

On the question of what factors are related to the wear resistance of powder metallurgy, today's Zhongwei Precision Editor will share it with you. Of course, there are many reasons why the density of powder metallurgy affects the wear process, but the wear of materials mainly occurs in the process of surface deformation and fracture. Therefore, all factors favorable for improving the surface strength and toughness of friction pairs will improve their wear resistance