History of powder metallurgy

The use of powder metallurgy dates back to more than three thousand BC. The first method of making iron was essentially powder metallurgy. And modern p/m technology

There are three important signs of development:

1. Overcome the difficulties in the process of melting and casting refractory metal. 1909 manufacturing electric lamp tungsten wire, promoted the development of powder metallurgy; 1923 powder metallurgy cemented

The appearance of gold was hailed as a revolution in machining.

2. In 1930s, porous oil-bearing was successfully manufactured; Then the development of powder metallurgy iron based mechanical parts, give full play to powder metallurgy with little or no cutting

Advantages.

3. Develop to more advanced new materials and technologies. In the 1940s, cermet and dispersion strengthening materials appeared, and in the late 1960s to the early 1970s, powder

High speed steel and powder superalloy appeared one after another. High strength parts have been manufactured by powder metallurgy forging and thermal isostatic pressure.