High performance compaction process

Chnfaranrn

Featurine

ana

with

International Metallurgy

centration,

2000

Conference on Powder and Particulate Materials.

For further details contact the

MPIF: 105 College Road East, Princeton, NJ, 08540-7700,

instrumented

volume

and part size expansion

and

ejection

force was described. Influence of com-

paction

pressure on green density were mea-

sured and were discussed.

e-mail:

Fatigue behaviour density, structure

Coatings for PM tooling

and post-sinter

Methods of coating PM compaction

g.cm” tools, to

in as sintered and tempered conditions

increase

wear resistance

and reduce die wall

ized for point of crack initiation,

were reviewed.

Coatings

at the starting

other

to

treat-

were studied. Fracture surfaces were character-

friction,

and

heat

ment. Samples with densities of 7.25 and 7.35

L. EPease. (Powder-Tech A.wxiates Inc, USA.)

used

Ni-

Cu-MO steels was discussed with reference

Higher part density

potential

commonly

materials

were

point

size of defect

and sub-critical

crack

growth.

Material for warm compacted heavy truck transmission part P.Sko&nd. (H6gnniis AB, Hog&is, Sweden.) The need for larger PM parts in heavy vehi-

K.R.Couchman et al. (GKN Sinter Metals, USA.) Different approaches for attainment

of high

part density were discussed. Effects of lubricant type and effects on subsequent

part processing

were considered.

Recommendations

ferred processing

for attainment

for pre-

of high part

density and improved performance

were made.

cles, in comparison

with passenger cars, was

discussed. A gear transmission component 500HP

of an Fe-l%Al

alloy was reported.

The

cant

during

grain

growth

vehicle

The feasibility

is highly

tigated.

for a

stressed in service.

of making this by warm com-

paction of a Ni-Cu-Mo Prototype

steel powder was inves-

parts were evaluated

including

Nano-crystalline

Al-(62

ders were mechanically ed by pulsed electric transformations

with

Reversible

C.D.Tufile,

T.Ando. (Northea~tem University, USA.)

use of uniformly sized droplets in spray

The

deposition

in tests

control

was noted to be significant growth

A.J.Rawlings, F.G .Hanejko. (Hoeganaes Carp, USA.)

was described.

ed with different lubricant determined

compaction.

A

Z%Ni-

concentrations

and levels

of admixed

of die wall lubrication

by spray time. It was reported that

die wall lubrication

has little advantage when

used with warm compaction.

Advanced particulate materials and processes

Warm compaction Compaction and ejection of warm compacted powder mixtures Warm compaction to powder mixture flowability,

was discussed with regard properties

compressibility

ensure high green density forces. An investigation

38

MPR June

required,

good

and lubrication

to

and low ejection

of warm compaction,

2001

used in

heat sinks, low thermal

expansion

and high

electrical

were dis-

The

or volume prediction

fraction

K.S.F’andey, P.Arauinda

Diamond

but cannot be

shaped. It was reported that deposition mond film, by microwave

of dia-

assisted plasma, on

The

AISI

was shown

of solid

of to

supercooling

and to permit

(Regional Engineering College,

mechanical

properties

of a range

of

4ooO PM steels, after hot forging, with

and without heat treatment, Mechanical

formance.

heat treatments

well bonded to the W-Cu.

method

Indid

to a net shape W-Cu part had improved perThe diamond film was shown to be

droplet

Mechanical properties of hot forged and heat treated high strength PM steels xr*chipall,

was noted.

in-flight

were used to study

of microstructure.

thermal

conductivity

and

state of droplets as a function

distance.

cussed and the need for materials with higher offers high thermal conductivity

ECh~gwn et al. (Quebec Metal Powders Ltd, Canadd

method

simulations

Sn-Pb

loss-compensated

allow any degree of superheating,

electronic

conductivity,

A

in the

A study of

on rapidly solidified

calorimetric the thermal

S.I.Lee et al. (Hanyang University, Korea.) The properties of W-Cu composites,

of deposit microstructure.

solidification flight

Preparation of tungstencopper composite with diamond film coating

Al-Ni

were investigated.

Incremental epitaxial growth of tin-lead by controlled droplet deposition

epitaxial

steel powder was warm compact-

Phase

Powders and alloyed material properties

deposits

powder

pow-

transforma-

in nano-crystalline

including service tests. It was suggested that use

in

sintering.

thermo-elastic

and rates and mechanisms

and the

is use-

in

alloys were studied to identify phase compositions.

and dimensions

could offer cost savings.

to 66)at%Ni

current

of warm compaction

O.S%graphite

HIP, on mag

in powders and consolidated

part was shown

ful

which

alloyed and consolidat-

Study of die wall lubrication in warm compaction It was noted that die wall lubrication

processing

Y.D.Kim et al. (HanyangUniuersiry,Korea.)

to be satisfactory

regard to properties

soft magnetic

alloy showed signifi-

Thermo-elastic transformations nickel-aluminium

tions were detected

considered.

High performance compaction process

et al. (Wayne State Uniuersiry, USA.)

Development

of process conditions,

Sweden.)

of warm compacted

L.E.Wengm

netic properties were evaluated.

infoQmpif.org. S.Bengtsson. (Hliganiis AB, Hijgati,

Effect of hot isostatic pressing on magnetic properties of iron-aluminium alloy

resulted in superior magnetic properties. Effects

Effects of density and microstructure on fatigue properties of warm compacted steel

USA; tel: +i-6og-452-

7700; fax: +I-6og-987-8523;

and

process temperature

on die wall friction,

which was held in New York, USA, in June 2000.

lubricants

from the Proceedings of PM*TEC 2000

abstracts

tooling, was described. Effects of lubricant con-

PMZTEC2000. The Abstracts that follow are of papers presented at the

different

selected

KO~IVI.

properties

were investigated.

were increased

by the

after forging to levels compa-

rable with casdwrought

alloys.

www.metal-powder.net