Fatigue crack in powder metallurgy injection molding

Dec 01, 2022

In the process of powder metallurgy injection molding, we will encounter many problems, one of which is fatigue crack. How to solve the fatigue crack in powder metallurgy injection molding? Let's follow the powder metallurgy manufacturer zhongwei to understand:

Due to the remarkable advantages of powder metallurgy, powder metallurgy materials are widely used in aeroengines. However, powder metallurgy materials are prone to contain defects and become the starting point of cracks under fatigue load, thus reducing the fatigue life of components.

Powder metallurgy; Metal injection molding

In order to solve this problem, relevant technical experts have conducted research. Based on the crack growth data of standard compact tensile specimens and the Paris formula, relevant experts obtained the crack growth parameters of materials at typical temperatures, and verified the adopted crack growth calculation method with simple pieces. The crack growth test of powder metallurgy rotating parts was carried out, and then the fracture analysis was carried out. The crack growth life is obtained by measuring the fatigue band.

At the same time, the finite element method is used to calculate the crack growth life of P/M parts, which is in good agreement with the measured value. The validity and practicability of the crack growth life analysis method are verified. It can be seen that, in order to solve the problems such as fatigue cracks caused by powder metallurgy technology, as long as the solution is to change the material properties at the crack prone areas, the general solution is to increase the material strength at the crack prone areas to achieve the goal.

After reading the above contents, we all know how to solve the problem of fatigue crack in powder metallurgy injection molding! If you want to know more about powder metallurgy products, you can call Zhongwei Precision Powder Metallurgy Factory.