Powder metallurgy sintering methods usually
have the following categories:
Liquid phase sintering
If there are more than two kinds of
components in the powder blank, sintering is likely to be carried out above the
melting point of a certain group of elements, so that a small amount of liquid
phase appears in the powder compact during the sintering process.
Pressurized sintering
In the sintering process, the powder is
applied to the powder to promote its densification process. Pressurized
sintering is sometimes synonymous with hot pressing, hot pressing is the
combination of powder forming and sintering, and the process of the product is
directly obtained.
Activated sintering
Some physical or chemical measures are
adopted in the sintering process, the sintering temperature is greatly reduced,
the sintering time is shortened, and the performance of the sintered body is
improved and improved.
Spark sintering
The powder body is formed by the direct
current power and the pulse electric power, and the electric arc between the
powder particles is sintered; and the pressure is gradually applied to the
workpiece during the sintering process, and the two processes of forming and
sintering are combined together.
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