Status and development of powder metallurgy tooling materials

literature Powder production

~38

Compaction

~38

Sintering

P39

Fundamentals

P39

Iron and steel

P39

Molybdenum

P39

Nickel

P39

Tungsten

P40

Ceramics

P40

Composite

materials

P40

Electrical and magnetic Hard materials

materials

P40

and tool steels

intermetallic

materials

Mechanical

alloying

Metal injection

moulding

authors,

S.&b&m.

(Teknikokullar,

Al,

Al-lwt%Li,

P4*

and He, at high and low pressures, der characteristics. phology, gas

made

Particle

affected

in He

break-up

size and

and

were

sizes and were tions.

organizers.

were considered.

Oxidation

of

Powders

due to secondary

near-spherical

irregular

papers,

mor-

0 content

shape.

finer

on pow-

were influenced

particle

were

to

of air, Ar, N

and densities.

system or, for conference

at finer

in larger

size frac-

and times to disintegration

Use of rotating electric arc for production of spherical powders I.Bica.

(West University of Timisoara, Timisoara, Romania.) Rev. Metal. Madrid, Vol 36, No 4, 2000, 287-291. In English. electric

device had been used to make spherical

arc metal

atomization

and inductive

of

of centrifugal

plasma techniques

had been devised. The method was tested on a

tion frequency

Ni alloy, Ti-O.l7%Pd

SOVdc,

current

3gm.min -1.

50A

applied potential

and

mass

flow

rate

and pure Cu and the

results are described. Effects of process parameters on powder characteristics ed. The

method

were investigat-

allows molten

ed to attain this. Studies of powder and pressing on a CNC press were described. ed that under-cut

It is report-

shape parts had been pro-

duced. This made use of side pressing as well as multiple

top and bottom punches.

and accuracy

of the process,

Consistency

used to make a

gear, were evaluated.

A high-pressure

powders 15mm to 20mm in size when the rotawas 750sec-‘,

parts were discussed with regard to steps need-

triaxial

device

oped and used to investigate

fine, high purity powders of high melting point a combination

and process require-

of uniform high-density

et al. (University of I&ester, I.&ester, UK.) Powder Metall., Vol43, No 3, 2000, 253-262.

It is reported that a process for production using

Powder characteristics ments for production

I.C.Sinka

A.Lacour, F.Folio. (Swiss Federal Inst. of Techno&y, Lausanne, Swit&and.) Powder Met&, Vol 43, No 3, 2000, 245252.

alloys,

T.Hikitaet al. CWaidaMfg.Co. Ltd., Taknyama,Japan.) J.Japan Sot. Powder/Powder Metal., Vol47, No 6, 2000, 658.664. In Japanese.

High-pressure triaxial facility for powder compaction

Centrifugal atomisation of alloys in inductive plasma onto cooled disc

Powder production

a rotating

nozzle device

and surface texture

by gas velocities the

Loan

Powder

Mg and Sn powders were

in a confined

to contact the conference

that

Turkey.)

Metall., No143, No 2, 2000, 173-180.

test the effects of the properties

to contact individual

It is reported

Ankara,

Compaction Development of compacting process for production of under-cut shapes

Effect of atomising gas on characteristics of metal powders

P41

P4*

use the Interlibrary

plasma spraying or laser surface

alloying.

gas atomized

For copies of fuil papers you are recommended

for sintering,

P41

P4*

PM components

Literature.

alloy to fall,

metal powders. Testing by

hydrostatic

with using

two

Deformations

of cyhndrical

pressure

superimposed

was devel-

compaction

up

axial

to

loads

independent

of

samples 700MPa

was possible servo-systems.

and loads could

be measured.

The system is described and results for Fe powders presented. dated

triaxial

closed-die

Isostatic

compaction,

compaction

compaction

and

consolisimulated

tests were carried out.

Samples were compressed

from a state of dense

random packing to near full density.

Intensive grinding of metal powders in electro-magneto-mechanical mill

drop-by-drop, Cu disc.

Status and development of powder metallurgy tooling materials

F.Binczyk et al. (Silesian Technical University, Katowice, Poland.) Powder Tech&., Vol 114, No J-2, ZOOJ, 237, 243.

Laser synthesis of nano-crystalline silicon carbide powder

N.C.Dong, S.C.Yong. (Man&t. Technol. Inst DFM, 1I, No I, 2001, Hubei Shiyan, China.) PM Indushy,Vol 32-35. In Chinese.

Use of an electro-magneto-mechanical

mill

for very high energy grinding of metal powders is described.

It is reported

that the energy in

the centre of the mill is about 2MW.me3, very much

higher

Consequently

than

in

milling

conventional

time is short. Fe-AleSi

was reduced from 155mm utes.

Similar

materials.

38

The

effects

to 8mm in 2 min-

are

Fe-Al&

MPR April

mills.

2002

noted

powder

for

hard-

is intended

on to a spinning

water-cooled

PM tool materials

Y.Zhaoyuan et al. (North

Eastern University, Shenyang, China.) PM Technolqy,Vol19, No 3,2001,162-164. In Chinese. It is reported Sic

powder

vapour

that

had been

reaction

Productivity

of

of synthesis

and

from the

a low cost produced

nano-sized by a laser

(C,H,O)ZSi(CH,),. process,

powder

mechanism

properties

opmental

made for application

00260657/02/$

use and develSuggestions

are

of new tool materials.

Metal powder rolling Z.D.Zhou. (Central Iron and Steel Inst, Beijing, China.) PM Indusrry,Vol 11, No 1, 2001, 36-39. In Chinese Mechanisms

were A

investigated.

in current

trends are reviewed.

mechanism

-see front matter 0

2002

in powder rolling are discussed. where

powder

weight

is

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