What is the reduction method to make metal powder?

1. What is powder metallurgy?
 
Powder metallurgy is a technique for making metal powders and using metal powders (sometimes with a small amount of non-metallic powder) as raw materials, through mixing, forming and sintering, making materials or products.
It consists of two parts: (1) making metal powder (also including alloy powder, hereinafter referred to as "metal powder").
(2) with metal powder (sometimes add a small amount of non-metallic powder) as raw material, through mixing, forming and sintering, manufacturing materials (referred to as the "powder metallurgy material") or products (referred to as the "powder metallurgy products").

2. What are the most prominent advantages of powder metallurgy?

The most prominent advantages of powder metallurgy are two:
(1) can be made currently used other processes can't manufacture or difficult to manufacture materials and products, such as porous, sweating, shock absorption, sound insulation materials and products, such as tungsten, molybdenum, titanium and other refractory metal materials and products, metal, plastic, double metal composite materials and products, etc.

(2) can directly produce accord with or close to finished size requirements of the products, so as to reduce or eliminate the mechanical processing, the utilization rate of materials can be as high as 95% above, it can also in some products with iron and copper, do the "province of material and energy saving"

3. What is "iron base"?
What is ferrous powder metallurgy?
An iron base is a material consisting of an iron matrix.
Iron-based powder metallurgy refers to the use of sintering (including powder forging) method, made an iron as the main composition of powder metallurgy materials and products (iron base mechanical parts, antifriction material, friction material, as well as other iron-based powder metallurgy material) of the process.