Structural features in spray formed lead-tin-antimony bearing alloys

T.Abe. (Tohoku Nationnl Industnal Sendai, Japan.) I.Jnpan Sot. Metall., Vr,f 47, No 8, 2000, 819~323.

H Hashrmoto, Research

Inst.

Pw&r/Powder In Japanese.

A Z-dimensional

model

simuIation

was used

to study ball motion

during

mechanical

alloying

in a vibratory changed

mill. It was found that ball motion

dramatically

tion increased very violent. was limited

frac-

in the range 0.7 to 0.8 becoming At ball-charge

less than 0.7 motion

to lower parts of the mill and filled

the mill above ball/vessel

when the ball-charge

0.8 with

collisions.

mum ball-charge

increased

frequency

It is suggested

of

that the opti-

range in 0.7 to 1 .O.

to use, are noted.

It IS suggested

provide

of making

a means

and properties

of Ti, Ti-6%Al-4%V

The good properties

of Ti alloys and difficul-

which

may present

a harrier

Derr~ Inst. for Machmery Research,

(TKITIJIII

48 In Chmese.

selection

properties,

tool design,

and production

PM timing

Structural features in spray formed lead-tin-antimony bearing alloys

cussed.

pulley

process

materials

for making

for automotive

It is reported

into commercial

a

use are dis-

that the part had been put

production.

A. &ndhyaya et nl Bull. Mater. Scrence (India), Vol 23, No 2, 2000, 73-78.

Analysis

Pb and Sn base bearing regard

to structure, Hard

resistant

are discussed

which

is less than

deposited

under

Temperatures

different

on to a during

that

in cast alloys. was found

the hard

compared

Maximum

and experimental

verification composite

for an inorganic membrane

YI.Xu etal. (Cenml

conditions

cles had a size of 4 to 8mm, the deposit

a

were measured

It was found

to 80mm

provide

Pb-12%Sn-12%Sb

of Cu and As were spray

substrate. deposition.

alloys

constituents

surface.

with small additions

ties in machining,

timing pulley

Tiunlin, Chino.) PM Industry, Vol JO, No 5, 2000, 44-

Structure,

ideal in castings.

C.YonRjia. (Central iron B Steel Research Inst., Bejing, China PM Technology, Vol 19, No 1, 2001, 45-48. In Chinese.

PM automotive W.Z.Qm.

and Ti-Mo

PM components

wear

Production of titanium alloys by metal injection moulding

Processing

alloys are reviewed.

with

Metal injection moulding

that MIM may parts.

Chm)

A model brane,

with 70

Factors

in

at the deposit/substrate

Vol JO, No 5, 2000, 44-48. In

Chinese.

parti-

porosity

Bqmg,

Iron W Steel Research Inst.,

PM I&my,

for a composite

on a porous affecting

resistance

inorganic

PM support,

separation

and a formula

to flow arc considered.

was validated

mem-

is presented. The

for

model

by experiment.

interface.

Con

PM 2000.

The Abstracts

the 2000

Powder Metallurgy

that follow are of papers presented

at

World Congress, which was held in

Kyoto, Japan, in November.

Binders for agglomeration of aluminium powder for PM applications

Light alloys Effects of magnesium addition sintering and properties of aluminium alloy

on

L.P.Lefebvrre, Y.Thoma\. (National Research Council of Cm&,

Quebec, Cannda.)

Flow of powders

H.Danmnger et al. (Technical Unwerrxy of Vumna,

conflict

between

Austria.)

powders

and better

The effects

and

of up to 4.5wt%Mg

mechanical

properties

1.6%Cu-2.5%Mg T6

Experimental sintering

re.sults

conditions during

of Al-5.5wt%Zn-

were

was charactensed. formed

on sintering

alloys, heat treated

conditions,

were

used

The amount sintering

to W and

investigated. to optimise

in N. Structural

evolution

of fine powders. ated

to

binders. able

alloys

was

O.Olat%Pb erties mental

reviewed.

of Al-Zn-Cu-Mg powders.

tion

alloys

of

out cleanly

micro-alloying

38

MPR January

noted

made

was attributed elements

boundaries.

from use by

was shown

use

at less than

of

to be a suit-

as a lubricant 42OoC

and giving

that

in a PM magnesium

less that

phase

from

gest that reduction

The sinat

grain

materials

rate is low and temperature

plasticity. plastic

and occurs when

is high,

point in “K. Evidence

rate and reduce

fine grain size

IOmm, was noted

in pseudo-single melting

to segrega-

Diffusion green

alloyed

and

powders,

sintered

from diffusion ders

(MicroMet

GmbH

were

notably with

properties.

alloyed

with

based on regard

Samples

and oxide

compared

characteristics

Powder-

Gmmy.)

Cu, were discussed

reduced

regard

to

made pow-

to sintering

and properties.

Die filling capability mixtures

87% of the

was shown to sug

in grain size increases

temperature

PM provides

required

J.Auidsson. (H @miis

super-

AB,

Higati,

der quality

that some standard

are of limited

of powder

performance.

die filling

simulator

used

for

rectangular density

for mixtures were presented

been

dies

that

and

exhibited

superplasticity.

high

a

developed

and

to determine

the

and filling orientation

of powder

for cold

tests of powin prediction

It was reported had

effects of die dimensions on filling

ability

mixtures. warm

Results

compaction

and discussed.

that PM ZK61 Mg

alloy with a grain size of 500nm temperature

strain

for super-

means for making

alloys. It was reported

stram

of powder

Sweden.) It was noted

for superplasticity,

and prop ele-

B.Maic.

Trchnulq-y, Hambq,

H..V&nson,

Japan.)

A condition of Al

G.A.Mowtmy,

electrolytic

H.Watambe et al. (Osaka Mumc~pal Techmcal Research

strain rate/low

2002

derived

can be agglomer-

properties

it acts

to

of coarse

Diffusion-alloyed non-ferrous powders for self lubricating bearings

parts with good properties.

ht.,

for this were dis-

to micro-alloying.

enhancement of

was smtermg

Mechanisms

cussed with regard tering

It

since

Superplasticity alloy

on sintering

or Sn enhanced

properties flow

with regard

handling

Fine powders

Polyethylene

typically elements

easier

improve

binder

bums

was discussed

of liquid phase

was considered.

Micro-alloying effects on sintering aluminium-zinc-copper-magnesium alloys Effects of trace

Powders

Development of a new lubricant PM compacts

for

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