International standards and the PM industry

and irregular,

and ZrOz.

is dcducrd applied

that

when

with a wax hinder.

the

using

corrections

high

It

must

solids

be

loading

and

(irregular powders.

Increased to

wick

increase

reduces flow

permeability

draining

capillary

front

hut

pressure.

matched

the

is

larger The

shown

pore

shape

final

size of the

stage

elf wick

debinding.

Analysis of die filling moulding

in injection

C.J.Hwtng, T.H. Kwn. (Pohmg L’mwnq

L.Kounlski, J.Dusrczyk. (De& University of Technology, De&, The Netherlands.) J. Mater. Science Lat., Vol 18, No 17, 1999, 1417-1420. The

of Sirmce

Production of sintered titanium using metal injection moulding

importance

moulding tics,

including

are

required

(In En&h. I

The

results

Procedures tion

for

mouldinp

terization

fccdstocks,

and

discussed. regions

charncterizatlcm

finite

The

slip characmethods,

of thick

PM parts

full three-dimensional A program

using

element

presence

in many

of injec-

and

the

anil

simulation

for three-dimensional

is described

which

allows

of the simulation

burization

during

Rebinding

and

for

investigated

simulation

polypropylene-wax

revision

debinding ed parts

is reported.

taminated

with

is

in

is

furnace

and sintrring

a clean

The

furnace vapour

atmosphere.

described

for

It

is stated

injection complex the

shape

process

nologies. which

that

is not con-

are

continuous nificant

and

is shown and

and

hinders

of various

com-

properties

attained

are

that Ti- 12%Mo,

moulding density PM

2% higher

alloy

and

properties.

cles further

enhanced

powders, than

made tech-

permits

debinding

in the same furnace.

simulation. of specific

available

3 16L stain-

are presented

and

therefore

had

of cracks

carried

out

to

heat

These

were locat-

initiation

occurs

liquid.

Simulations

investigate

history

after spraying. could

parti-

and crack

of residual

influence

enhanced when

presence

in large steel and

is reported.

ed in the head

Thermal a

in large spray

was

Spray

parameters

temperature

he reduced

the

during

gradients.

or avoided

stainless

steel powder-40%

liquid and solid states, flash technique. late

the

models

of a 60%

Attempts

thermal but

by use of lower

inputs.

fine

J.G.C.Moreno et al. (National Polytechnic inst., Mexico DF. Mexm) J. Jpn Sot. Powder/Powder Metall., Vol46, No 9, 1999, Y42-946. (In English.)

conductivity

where

in

by a laser various

measured

values

in is a

should

lit

alloying

of elemental

was investigated

compositions.

were detected and

Co,Ti

Nanometre

size particles matrix.

were

The

Co-33at%Ti-

Co-50.4%Ti-l.O%Fe.

and CoiTi

ders after

Co-Ti

at two intermetal-

in an amorphous

compositions

0.6%Fe

that

conductivity

powders

powder

experiment

It is emphasized thermal

parameter,

hinder,

using with

Mechanical

316L

were made to calcu-

in comparison

these were inaccurate. simulations,

polymer

was measured

to

Cracking

Crystallization of mechanically alloyed cobalt-titanium powder

conductivity

and

were found

Thermal conductivity of metal powder-polymer injection moulding feedstoc k

thermal

in

were

cracking.

calculated

Mechanical alloying

The

dis-

et al. (Uniuersq of Bremen, Bremen, Int J. Powder Metall., Vol 25, No 6, 1999,

The observation

of Tic

the properties

Thermal cracking formed billets

and well dispersed.

required

were detected

CoTi, in the pow-

heating.

be

Miscellaneous

used.

Numerical simulation of 2-dimensional wick debinding

of feedstocks

in any

investigation

feedstocks

Cu based billets

the conven-

Addition

heat,

Spray forming

J D.Fischer Gemany.) 27-34.

made by injec-

from premixed

mechanical

for

to be a sig-

allows

Ti were

Ti powder

the

dehinding,

time

processing,

and sintering

has other

catalytic

dehinding

improvement

in

parts, with

In particular, reduces

of

particularly

lightweight

tion tional

furnace

moulding

competltivc

The

It is reported

The

trends

process,

atomized

of an

is

and characteris-

dehinding.

of MIM

J.T&kuwu, N.Sakum. (Jshmrmaki Shemhu University, Ishmomnk~, Japan. I J. Jpn Sot Powder/Powder Metall., \;)I 46, No 8. 1990, 877-881. (In English.)

sintered

improvementa

moulding

and

specific parameters

injection

production

cussed.

and car-

Effects of process conditions on properties of injection moulded titanium-molybdenum

mould-

presented.

Aspects of injection automotive parts

using

positions.

and sintering

technical

and

both

of injection

binder

sintering sintering

part

properties

of commercially

less steel

properties

nitriding

described.

die filling.

a

hut that

due to oxidation,

arc noted.

heats

pure Ti can he produced

moulding

thin

E.Nukmukmri. (Shimulsu ,Mectem. Otsu Jqxm.J J. Jpn Sot Puu&r/Pou~&r hletall., Vol 46. No 8. 1999, 844s 848. (In Enghsh.) of

injection

are poor

A furnace for debinding and sintering of injection moulded parts

Development

using

that

are

need

automatic

during

It was noted

starting

The

Techmlog~, Pohnng. Kow.) J. Jpn Sm.. H.Nnkmutra et ul. (Pmfic Metals Co Ltd, .4omi1n, Pwder/Pou~&~ Metall., \;rl 46, No 8. IYYY,X37-84:. Japan. ) ,I.J/IIISotI’ou&r/I’oder Metall. , Vol4h. No 8, 1990, 870-876. (In English.)

of simulating

before

emphasized.

and

’

Specific heat of metal powder-polymer injection moulding feedstock

Development and applications joining in injection moulding

International industry

of

standards

and the PM

W.A.Buerkel. (Clewland. OH, USA.) Int. J. Powder Mmll., Vo125, No S, I9YY, 39-43 Dehinding

of inJection

is discussed.

Numerical

dimensional

wick

wick combination and

element time

38

saturated are used

the compact.

is shown

MPR

to agree

Februarv

compacts compact-

For simplicicomponent

Metal is noted. larger

suh-parts,

to model

binder

descrihcd.

dehinding

2001

data.

on

strength

described.

moulding

is discussed

on part size, imposed An

parts,

Finite

published

injection

a limitatic)n

compacts. Predicted

with

The

of two-

of

is for a single

fully

methoda

flow from

debinding is described.

ty the simulation binder

moulded simulation

investigation

aimed

by combining during

injection

dehinding

hy die size, at making

of

process

and

structure

of

paper

is

variables joints are

questioned

the development

standards

for the PM industry

nizations

responsible.

USA

a voice

has

standards

moulded

and sintering,

Effects

and

ANSI European USA

and

the

standards interests

for the time

It is noted in the not

the

the

of IS0 and

case

EN. It is concluded

in standards being

that

ASTM in

of

the orga-

evolution

American hut

standards,

and

of that

are satisfactory,

at any rate.

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