Plasma nitriding of carbon-chromium-molybdenum steel processed differently

Plasma nitriding of carbon-chromium-molybdenum steel processed differently

Further investigations progress to validate intermetallic were reported to be in the use of oil to protect materials. Plasma nitriding of car...

166KB Sizes 0 Downloads 8 Views

Further

investigations

progress

to validate

intermetallic

were reported

to be in

the use of oil to protect

materials.

Plasma nitriding of carbon-chromiummolybdenum steel processed differently Y.Yu et al. (Hiigati AstaloyCrM, steel

powder,

was alloyed

processes and high-

of temperature

0.2,

0.35

or

by a range of sintering

characteristics.

to

The

to establish

of improved

Samples

materials

conditions

alloys.

Methods

The

steel tensile

based

binder,

solvent

and sintered

1100°C

to 1350°C.

powder with

and

thermally

in H for one

Tensile

hour

properties

for pro, were

Calculated

test

and experimental

data were com-

Physical

Improved performance of polycrystalline cubic boron through coating

stainless

on properties stainless steel

were

It was noted

that cubic

hardness

nitride

BN may be used for

coatings

notably

exceeds

little

used for BN.

PVD

TiAlN

when

55C

are common

steels and cemented

and

on high

carbides,

tensile

and ductility

strength

of 3161, moulding,

1050°C

density,

to

125OOC.

was described.

porosity,

hardness,

the that

speed

S.Schwartz Germany.)

that

had increased

Samples

thin

BN tool

ent

applica-

(Zschimmer

of 316L

thicknesses

injection

of polycrystalline cubic for machining ferrous

d

steel,

technology to

make

materials

Ti and shape-

pores.

The

size

and

of Ti was enhanced Impurity

assess

of properties

microscopy

using the

properties

variation

could be

determine

of Ti hydride.

contents

were measured

was

to

with

porosity.

to

evaluate

used

and production

stainless

steel,

moulding.

Effect

on the injection

with water debinding

and

Data for as-sintered

machining

Metalcutting

on

experimen-

that

to process significant

moulding

process

was yielded.

ed carbides,

in cutting cermets,

Mechanical

ceramic

rials. New developments

cement-

and superhard PM mate-

in tooling and consid-

of ‘what is different were considered

MPR June 2002

about

machining

with examples.

for optimising

PM pro-

and corrosion

Finite element simulation compaction and sintering tungsten carbide-cobalt D.Bouvard et at. (National France .)

properties

at the

2000

World Congress,

PolytechnicInst. of Grenoble,

data from characterisation

tutive

models

which

were analysed From

for compaction

the

model

element

density

was acceptable

agreement

and measured

results.

of fracture

was predicted

were

between

Criteria

were discussed.

were extended

meth-

maps

were calculated.

dicted

compaction

of

consti-

and sintering

by finite

There diction

2000.

of die of

powder was used to construct

part shape

pre-

for pre-

Results

for

to sintering.

Final

and compared

with

experiment.

Friction and porous materials

Solid state sintering of interacting two-component mixtures

Application of porous materials elements of construction H.Y.Borodians’ka et nl. Science, Kiev,

Methods

were reviewed

to machining

improvements

with regard to part pro-

deduced and forces on tooling

which was held in Kyoto, Japan, in November

of Al and Ti

and

Modelling and simulation

ods.

that follow are

was

development tool materials,

presented

Metallurgy

Results

Experimental

materials

processing

was made with cermet

usually with coatings,

with special reference

PM materials’

Powder

parameters.

carbide tool materials.

tooling

The Abstracts

2000.

from papers

Factors

B.North. (Kenname& Inc., USA.) Advances

PM

involved

and heat treated

and continuous

Comparison

and cemented

for with

to the steel being cut, types of

lubricant/coolant and interrupted

conditions

investigated

GmbH.

with differ-

with respect

information

Inst., (IFAM),

for production

were

duction.

of temperature

It was reported

Fraunhofer

were made by

was investigated

parameters.

in tool lives were considered.

of cutting

additions

presented.

case histories PM materials

cubic BN were presented.

affecting variations Optimisation

Technologies

WC-Co

of Fe-Ni and Fe-Cu

polycrystalline

M.Weber, G.Rausch. Bremen, Germnny.)

for

were considered.

B.A.Young. ([email protected] Master Tool Company, USA.) Laboratory

Lightweight metal foams transport application

cessing were reviewed

for

Schwartz

and densities,

tally and by modelling

tions and results in use were reviewed.

62

stainless

and mechanical

foams

et al.

water debinding

eration

by PM

were reported.

parts. Properties,

materials,

that

shape of pores. Sintering

of the samples

Injection moulding parameters one-stage water debinding

and gave improved surface

Optimisation boron nitride PM alloys

at

of the test samples

life by 50% to 500% on machined

properties

by injection

Microstructure,

they have been

It was reported

coatings

made

investigated

finish

MnS

G&H,

Jdich

with up to 80% porosity,

materials

Optical

were discussed.

hard PM materials,

Rockwell

and mechanical steel,

Production

F.J.Teerer. (Balrers Inc., USA.)

cutting

use of these

(Forschungrentrom

It was reported superalloys,

by addition

pared.

Effect of temperature of injection moulded

maximum

of

analysed.

deformation.

Cutting tool materials

whilst

al.

shapeholder

procedure.

described.

cutting

et

holder

analysis were used

tensile

was

Germany.)

at

found to

were

results

M.Bram

fabricated

the

to structure

space

Properties of porous titanium stainless steel and superalloys

equations

simulate

pore

of making

depend on density and grain size. Constitutive and finite element

of these factors and

were proposed.

test samples were

moulded from atomised

debound

to

under various conditions

and time.

characterized duction

with

with differing microstructures,

were plasma nitrided

Numerical simulation of tensile properties of injection-moulded stainless steel

a wax

cold and warm compaction

and porosity

phase

3 16L stainless

3%Cr-OS%Mo

and low-. temperature

make specimens densities

sensitivity

solid

injection

and consolidated

including

The

D.Yoon et al. (Bestner Inc., Koeea.)

AB, Sweden.) a prealloyed

OS%graphite,

Powder injection moulding

porous ment

of

The effect of alloying

(Inst.for Probkms of Materials

improving

materials of fracture

absorb

A.P.Sauitskii. Y.S.Kwon. (Uniuerslty of Ulsnn, Korea.)

Ukraine.)

strain

the

properties

were identified toughness,

ness of the material to

as

increase

and increase energy

at

of

as enhancein stiff-

in capacity

high

0026.0657/02/$

porosity.

tering

of

two

during solid state sin-

interacting

investigated

with

deformtion

in

components

reference

the

to

diffusion

approach

treated

sintering

and takes mass transfer

A

mechanism

experimental

- see front matter

0

2002

alloying

stresses zones.

was and The

as a driving force for

was proposed.

into account. Predicted

and

results were compared.

Elsevier Science

Ltd. All rights reserved.