POWDER METALLURGY

Mateusz Soja

Piotr Pabiańczyk

IM sem.3

16.11.2021

2

Introduction

Powder metallurgy is a process for
forming metal parts by heating
compacted metal powders to just
below their melting points.
Powder metallurgy is the study of the
processing of metal powders, including
the fabrication and conversion of metal
powders into useful engineering
components.

Basic P/M Steps

• Raw Material/atomization,
• Mixing,
• Forming/Compaction,
• Sintering,
• Optional Operations,
• Finished Products.

Powder Compaction and

Sintering

POWDERS

One method of metal-powder
production by melt atomization
Atomization is
accomplished by
forcing a molten
metal stream
through an orifice
at moderate
pressures.

MIXING

Elemental, partially alloyed or pre-alloyed
metal powders are first blended with
lubricants to produce a homogeneous mixture.
Cycyle of mixing:
1. Reduction of oxides,
2. Annealing,
3. Powder Weighings,
4. Adding lubricants,
5. Mixing.

FOMRMING/COMPACTION

Methods of compaction are:
• Pressing,
• Rolling,
• Extrusion,
• Injection molding.

Pressing

Compaction Cycle:
1. Cycle Start
2. Charge die with

powder

3. Compaction

begins

4. Compaction

complete

5. Ejection of

compact

6. Recharging of die

MECHANICAL PRESS

SINTERING

The parts are heated below the
melting point of the base metal, held
at the sintering temperature, then
cooled.

Typical sintering temperatures for

based metals range from 1100 - 1150

celsius degrees

Standard cycle times range from 2-3

hours.

SINTERING FURNACE

Optional Operations

• Heat treatment,
• Impregnation of sintered,
• Machining,
• thermo-chemical treatment,
• Surface treatment of sintered.

Examples of typical parts made by
powder metallurgy processes.

Thx for your attention