Powder metallurgy is the process of making metal powder or using metal powder (or a mixture of metal powder and non-metal powder) as raw materials, forming and sintering, and manufacturing metal materials, composite materials and various types of products. Powder metallurgy method and the production of ceramics have similar places, both belong to powder sintering technology, therefore, a series of new powder metallurgy technology can also be used for the preparation of ceramic materials. Due to the advantages of powder metallurgy technology, it has become the key to solve the problem of new materials, and plays a pivotal role in the development of new materials.

So what kind of changes have taken place from traditional powder metallurgy to modern powder metallurgy?

1. Technical differences

The traditional powder metallurgy technology is mainly through powder molding and ordinary sintering. Modern powder metallurgy technology A process method of forming and sintering metal materials or mechanical parts made of metal powder, which can be made directly without processing. The products can be prepared by laser sintering, microwave sintering and hot isostatic pressing of powder.

2. Different preparation materials

Traditional powder metallurgy can only make ordinary alloy materials, such as stainless steel and aluminum alloy, which have low properties. Modern powder metallurgy can produce a variety of high-performance structural materials and some special materials. For example, powder superalloys, powder stainless steel, metal base alloys, high temperature superconducting materials, ceramic matrix composites, nanomaterials, iron base, cobalt chromium alloy materials.

3. Advanced preparation technology

The powder particles prepared by the traditional powder preparation technology are rough and the size of the powder is not uniform. Modern powder metallurgy preparation technology includes jet deposition technology, electron beam laser melting technology, etc., and the prepared powder is smaller and more accurate.

4. Molding products

Traditional powder metallurgy technology prints products that are relatively rough, and intelligent printing of large parts with simple processes. The parts prepared by modern powder metallurgy technology are more and more complex, not only the shape is changeable, but also the size and quality requirements are more precise. Wider scope of application.