sintered metal-The basic concept of powder metallurgy

Powder metallurgsintered metaly is a manufacture of metal powder and metal powder (the powder may also add a small amount of non-metallic) as raw materials， mixing， forming and sintering， the material or article manufacturing techniques。 Data prepared for a beginner beginner， we hope to contribute。

Powder contains content

It comprises two partssintered metal， namely:

(A) the manufacture of metal powder (including powder of an alloy， hereinafter referred to as "metal powder")。

(2) the metal powder (the powder may also add a small amount of non-metallic) as starting materials， mixing， forming and sintering， manufacturing materials (referred to as "Powder material") or article (referred to as "powder metallurgy article")。
y process and advantages

The basic process of powder metallurgy process are:

(1) Preparation of the raw material powder and preparation (powder may be a pure metal or an alloy， non-metallic， metallic and non-metallic compounds， and various other compounds)；

(2) the metal powder compact of desired shape；

(3) The compact main component at a temperature below the melting point material is sintered， so that the final product has the physical， chemical and mechanical properties。

Advantages:

(A) Preparation of insoluble metal compounds， alloys false porous material

(2) to save metal， reduce product cost

(3) can be prepared from high-purity materials

(4) the ratio of the material to ensure the accuracy and uniformity of the composition

What is the iron-based powder metallurgy?

Iron-based material is the matrix composition is iron。 Iron-based powder metallurgy sintering refers (including powder forging) method， manufacturing iron as the main component of the powder metallurgy materials and products (iron-based mechanical parts， less wear materials， friction materials， and other iron-based powder metallurgy materials) process in general。
y is used for particle shape determined by what?

Due to the different method of preparing the powder， the particle shape is different。 Generally have an irregular shape， sheet， polyhedral， dendritic， granular， spherical droplets， fibrous 。。。。。。。

Powder compaction process is characterized by what?

The upper punch pressure transmitted to the powder， the powder in a way similar to the performance of the nature of the liquid， thus causing the side pressure。 In the distribution of force on the powder molding is uneven， because the friction between the powder particles to each other， each rod wedged so that the pressure in the transverse direction than in the vertical direction much more difficult to pass。 Pressing process also generates friction。 The central portion and the edge there is a pressure differential。 Compacts great stress memory。