Powder Metallurgy Process
Nancy
www.diecastingpartsupplier.com
2014-12-05 15:52:21
Powder metallurgy process is the basic process : 1. Preparation of
raw material powder . Existing milling methods can be roughly divided into two
categories : mechanical and physical chemistry . The mechanical method can be
divided into : mechanical grinding and atomization ; physicochemical method is
divided into : galvanic corrosion , reduction , of the legitimate reduction - of
legal , vapor deposition , liquid-phase deposition method and electrolysis.
Which is the most widely used is the reduction, atomization , and
electrolysis.
2. the powder is formed into a desired shape briquettes . The purpose of forming a certain shape and size to obtain green compacts , and it has a certain density and strength . Molding and compression molding method is basically divided into non-pressure molding. Compression molding, compression molding is the most widely used.
2. the powder is formed into a desired shape briquettes . The purpose of forming a certain shape and size to obtain green compacts , and it has a certain density and strength . Molding and compression molding method is basically divided into non-pressure molding. Compression molding, compression molding is the most widely used.
3. the sintered compacts . Sintering is a key step in the powder
metallurgy process . After forming the green compacts obtained by sintering so
that the desired final mechanical properties. Sintering is divided into units
based sintered and sintered diverse . For cell lines and multi- line solid-phase
sintering , sintering temperature lower than the melting point of metals and
alloys used ; for multi- line liquid-phase sintering , sintering temperature is
generally lower than the melting point of melt composition which is difficult,
but higher than the eutectic composition melting point. In addition to ordinary
sintering , there are bulk sintering , melting leaching, hot pressing and other
special sintering process.
4. the subsequent processing of the product . After sintering
process , according to different product requirements , take a variety of ways .
Such as finishing , immersion oil , machining , heat treatment and plating. In
addition , in recent years a number of new processes such as rolling, forging
material also used in processing powder metallurgy sintered to obtain better
results.