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Coating of cemented carbides for turning applications
FRACTOGRAPHY FRACTURE FERROUS
Solid
OF FATIGUE
SURFACES
state
investigated
IN SINTERED
powder
MATERL4LS ct al (Kumamoto
Kumamoto, and
Japan)
Powder
Sot.
Vol
Metallurgy,
1993, 1121-1125.
University,
.J. Japan
49,
various
stress
between
fatigue
steels
was
ratios
on
of
shear
and
intergranular
striations
and
porosity.
surfaces
striated
patterns.
the fracture
high
showed
areas crack
rate
and
surfaces
became
coarser,
with of
solidus temperature by ball
milling
1 pm powders high density.
DYNAMIC
J.A.
College ter.
et
Tempe,
al
(Arizona
Arizona,
Manuf.
Process., Vol 9, No 6, 1994, 1143-1154. The tensile
properties
of Mo-0.5atXHfC were evaluated
a strain rate of 10 “set-’ 2125°C
in vacuum.
hardening dominant reported 1525°C this.
in the range 925 to for
in the temperature range. deformation mechanisms
The are
to
be dislocation
Solid
effective
at
HfC was responsible
and grain
sliding
up to
sliding
above
boundary
solution
hardening
by Re was
up to 1525°C.
BASE ALLOYS
EN. Sheftel, O.A. Bannykh Metalurgy, toT
Moscow,
(Baikov
Russia)
Vol 12, No 5,
304-314.
From investigations the
underlying design
properties
suitable
with
and
with giving
to
for
data
alloys
alloys,
service
and
to
give
at 600
to
1400’ C are discussed
thermodynamics, formed.
TV elements
dispersoids
of
Nb
and phases
group
carbides,
of
1100 to
regard
equilibria
and published
principles
structural 800°C
Inst. of
ht. J. Refrac-
Metals & Hard Materials,
1993-1994,
and
of oxides,
phase
Alloys of Nb 0,N
and
nitrides
C, and
are discussed.
Tungsten SOLID STATE SINTERING TUNGSTEN
and
10 nm
as-sintered
COMPRESSION
TEST ALLOYS
C.H.
Watson
reported
OF
of Tic
the exothermic
reaction
kinetic yields
parameters
UK)
Ma-
CAUSE
OF PORE
and
used
for
of W alloys,
ener@
penetrator data,
and
incidence
critical
strain.
and
dispersion
of Test
are discussed.
Coatings CARBIDE
FORMATION
of
Japan)
POWDERS FOR
OF PROTECTIVE
IN
CERMETS
CARBIDE
Powder
WITH
ADDITIONS Inst. of Technology,
J! Japan
Sot.
Vol
Metallurgy,
Powde-r
40,
No
11,
1993, 1131-l 135. (In Japanese). The
formation
Mo,C-Ni particles the
micropores
up
to
were
coated
in TiC
6wtXZrC
It was assumed
was
that the ZrC
with
Zr02
during
and that this was reduced
liquid
during
evolution
of
formation.
sintering
and
result.ed
in
gas
Pores were suppressed
treatment sintering.
of
with
preparation
at
in creep
in the
pore
by heat
1250’ C in vacuum
An increase
ZrC is reported reduction
APPLICATION
of
Ti, C and
and tool
CARBIDE
investigated.
instrumented
and applications
CHROMIUM
between
Hard materiak steels
Narashino,
stress-strain
sensitivity
instability
of
in Fe by means
H. Suzuki et al (Chiba
Military
been
testing
and high density rate
an
had
compression test
given
reactions.
of the endothermic
TITANIUM
Vol 9, No 6, 1994,
that
device
The
(Royal
Shrivenham,
Process.,
before
strength
by
and this is attributed
to
in XC due to reduction
of ZrO,!
STRUCTURE AND PROPERTIES OF SINTERED HIGH SPEED STEEL CONTAINING
COPPER
COATINGS E. V.A.Maslyuk
et al Poroshkovaya
giya, No 8, 1993, 89-91. The use of Cr.& of
protective
possible.
powders
for application
is
The carbide
Metallur-
(In Russian),
coatings
by carburization
Niobium NIOBIUM
highest
of Science,
strain
University,
Mater.
and Mo-Sat’XRe-0.5’XHfC
made from
alloys. shear
State
USA)
die filling.
have good sinterability the
Manqf:
dynamic
AT HIGH TEMPERATURES Luo
benefits
TO TUNGSTEN
Relk,
It is
OF MOLYBDENUM
The dispersion
ZIRCONIUM
drop-weight
A.
which
ductility,
APPLIED
are
endothermic
giving good as-sintered
Compacts
had
Molybdenum STRENGTHENING
the matrix
Powder bulk density is increased
1155-l 161.
AND DISPERSION
examples
and
Fe and
below
had
independent
Some
TiBAl are considered.
can be densified
density and composition.
SOLID SOLUTION
that
fracture, low
were shear
microcracks,
composition
It is reported
discussed. exothermic
range
powder
As stress ratios increased
surfaces
numerous
for
compact
At
rates the surfaces and
in sintered
l/2
Fracture
intergranular
crack
investigated
specimens.
growth
11,
alloy
variables.
was
to the effects of
alloys with W powder in the 1 to 10 urn size
properties.
growth and fracture appearance alloy
No
(In Japanese).
The relationship Fe and
Powder
of W alloys
characteristics,
and process T. Yamaguchi
sintering
with reference
shown
powders
to
be
were made
Dudrova
Vyskumu,
et
al
Kosice,
(I’stav
Materialovehu
Czechslovakia)
Pokroky
Psaskove Metalmggie, No 1, 1994, 14-29. (In Czech). The influence conditions
of >! to lOwt% and process
on the structure
and properties
of a high speed steel, sintered to 99.5’% density, were investigated. Improved
of Cr powder.
Composites
structure
HAVEMETAL
COATING OF CEMENTED CARBIDES FOR TURNING APPLICATIONS
MATRIX COMPOSITES PROVED THEIR WORTH? C. Peel et al Farnborough,
(Defence IJK)
Research
Agency,
World, Vol 3,
Materials
No 1, 1995, 8-9. The matrix
paper
composites
value. The development shown
questions
that
have
whether
metal
proved
t,heir
considerable research effort is noted and MMCs
applications
where
performance
are
are
weight
critical.
that MMCs were oversold
of
and it is
value
saving
in
and/or
and properties
.J. Diblik, Pokroky Psaskove No 1, 1994. 30-3.5. (In Czech). Coatings cermets,
on
for
chemical
Tic-TiN-Ti
cutting
and/or
are discussed properties.
STRUCTURE
in terms
IRON ALUMINIDE
(C,N)
based
applied
physical
deposition
Intermetallic
Metalurgie.
tools,
tribological
It is concluded of the
are reported.
with
by
vapour respect
to
materials
AND PROPERTIES
OF
ALLOYS WITH
time scale for commercial return and that financial support had been withdrawn
ADDITIONS
before this had been achieved.
R.N. Wright et al (Idaho
REACTION
PROCESSING
MATERIALS
INDUSTRY
ing Laboratory, Idaho, USA.) ,I. Materials Science, Vol 28, No 8, 1993, 2040-2048. The effect of quenching Fe:r AI-Cr alloys
IN
HEAVY ALLOYS
OF CHROMIUM National
Engineer-
Labora-
J. Kellie, J. Wood (University of Nottingham, Nottingham, UK) Materials World, Vol 3,
from above 550 C on the microstructure and mechanical properties was investigated for two alloys in the range 2 to 5%Cr. It is
tories, Richmond, Washington, USA) Mater. Manu$ Process., Vol 9, No 6, 1994, 1115. 1126.
No 1, 1995, 10-12. The use of reaction processing to introduce ceramic particles into alloys is
reported that optimum alloys with an elongation brittle fracture mode.
W.E. Gurwell
(Pacific
Northwest
processing yields of 2O’X but with a
MPR April 1995
39
Solid
OF FATIGUE
SURFACES
state
investigated
IN SINTERED
powder
MATERL4LS ct al (Kumamoto
Kumamoto, and
Japan)
Powder
Sot.
Vol
Metallurgy,
1993, 1121-1125.
University,
.J. Japan
49,
various
stress
between
fatigue
steels
was
ratios
on
of
shear
and
intergranular
striations
and
porosity.
surfaces
striated
patterns.
the fracture
high
showed
areas crack
rate
and
surfaces
became
coarser,
with of
solidus temperature by ball
milling
1 pm powders high density.
DYNAMIC
J.A.
College ter.
et
Tempe,
al
(Arizona
Arizona,
Manuf.
Process., Vol 9, No 6, 1994, 1143-1154. The tensile
properties
of Mo-0.5atXHfC were evaluated
a strain rate of 10 “set-’ 2125°C
in vacuum.
hardening dominant reported 1525°C this.
in the range 925 to for
in the temperature range. deformation mechanisms
The are
to
be dislocation
Solid
effective
at
HfC was responsible
and grain
sliding
up to
sliding
above
boundary
solution
hardening
by Re was
up to 1525°C.
BASE ALLOYS
EN. Sheftel, O.A. Bannykh Metalurgy, toT
Moscow,
(Baikov
Russia)
Vol 12, No 5,
304-314.
From investigations the
underlying design
properties
suitable
with
and
with giving
to
for
data
alloys
alloys,
service
and
to
give
at 600
to
1400’ C are discussed
thermodynamics, formed.
TV elements
dispersoids
of
Nb
and phases
group
carbides,
of
1100 to
regard
equilibria
and published
principles
structural 800°C
Inst. of
ht. J. Refrac-
Metals & Hard Materials,
1993-1994,
and
of oxides,
phase
Alloys of Nb 0,N
and
nitrides
C, and
are discussed.
Tungsten SOLID STATE SINTERING TUNGSTEN
and
10 nm
as-sintered
COMPRESSION
TEST ALLOYS
C.H.
Watson
reported
OF
of Tic
the exothermic
reaction
kinetic yields
parameters
UK)
Ma-
CAUSE
OF PORE
and
used
for
of W alloys,
ener@
penetrator data,
and
incidence
critical
strain.
and
dispersion
of Test
are discussed.
Coatings CARBIDE
FORMATION
of
Japan)
POWDERS FOR
OF PROTECTIVE
IN
CERMETS
CARBIDE
Powder
WITH
ADDITIONS Inst. of Technology,
J! Japan
Sot.
Vol
Metallurgy,
Powde-r
40,
No
11,
1993, 1131-l 135. (In Japanese). The
formation
Mo,C-Ni particles the
micropores
up
to
were
coated
in TiC
6wtXZrC
It was assumed
was
that the ZrC
with
Zr02
during
and that this was reduced
liquid
during
evolution
of
formation.
sintering
and
result.ed
in
gas
Pores were suppressed
treatment sintering.
of
with
preparation
at
in creep
in the
pore
by heat
1250’ C in vacuum
An increase
ZrC is reported reduction
APPLICATION
of
Ti, C and
and tool
CARBIDE
investigated.
instrumented
and applications
CHROMIUM
between
Hard materiak steels
Narashino,
stress-strain
sensitivity
instability
of
in Fe by means
H. Suzuki et al (Chiba
Military
been
testing
and high density rate
an
had
compression test
given
reactions.
of the endothermic
TITANIUM
Vol 9, No 6, 1994,
that
device
The
(Royal
Shrivenham,
Process.,
before
strength
by
and this is attributed
to
in XC due to reduction
of ZrO,!
STRUCTURE AND PROPERTIES OF SINTERED HIGH SPEED STEEL CONTAINING
COPPER
COATINGS E. V.A.Maslyuk
et al Poroshkovaya
giya, No 8, 1993, 89-91. The use of Cr.& of
protective
possible.
powders
for application
is
The carbide
Metallur-
(In Russian),
coatings
by carburization
Niobium NIOBIUM
highest
of Science,
strain
University,
Mater.
and Mo-Sat’XRe-0.5’XHfC
made from
alloys. shear
State
USA)
die filling.
have good sinterability the
Manqf:
dynamic
AT HIGH TEMPERATURES Luo
benefits
TO TUNGSTEN
Relk,
It is
OF MOLYBDENUM
The dispersion
ZIRCONIUM
drop-weight
A.
which
ductility,
APPLIED
are
endothermic
giving good as-sintered
Compacts
had
Molybdenum STRENGTHENING
the matrix
Powder bulk density is increased
1155-l 161.
AND DISPERSION
examples
and
Fe and
below
had
independent
Some
TiBAl are considered.
can be densified
density and composition.
SOLID SOLUTION
that
fracture, low
were shear
microcracks,
composition
It is reported
discussed. exothermic
range
powder
As stress ratios increased
surfaces
numerous
for
compact
At
rates the surfaces and
in sintered
l/2
Fracture
intergranular
crack
investigated
specimens.
growth
11,
alloy
variables.
was
to the effects of
alloys with W powder in the 1 to 10 urn size
properties.
growth and fracture appearance alloy
No
(In Japanese).
The relationship Fe and
Powder
of W alloys
characteristics,
and process T. Yamaguchi
sintering
with reference
shown
powders
to
be
were made
Dudrova
Vyskumu,
et
al
Kosice,
(I’stav
Materialovehu
Czechslovakia)
Pokroky
Psaskove Metalmggie, No 1, 1994, 14-29. (In Czech). The influence conditions
of >! to lOwt% and process
on the structure
and properties
of a high speed steel, sintered to 99.5’% density, were investigated. Improved
of Cr powder.
Composites
structure
HAVEMETAL
COATING OF CEMENTED CARBIDES FOR TURNING APPLICATIONS
MATRIX COMPOSITES PROVED THEIR WORTH? C. Peel et al Farnborough,
(Defence IJK)
Research
Agency,
World, Vol 3,
Materials
No 1, 1995, 8-9. The matrix
paper
composites
value. The development shown
questions
that
have
whether
metal
proved
t,heir
considerable research effort is noted and MMCs
applications
where
performance
are
are
weight
critical.
that MMCs were oversold
of
and it is
value
saving
in
and/or
and properties
.J. Diblik, Pokroky Psaskove No 1, 1994. 30-3.5. (In Czech). Coatings cermets,
on
for
chemical
Tic-TiN-Ti
cutting
and/or
are discussed properties.
STRUCTURE
in terms
IRON ALUMINIDE
(C,N)
based
applied
physical
deposition
Intermetallic
Metalurgie.
tools,
tribological
It is concluded of the
are reported.
with
by
vapour respect
to
materials
AND PROPERTIES
OF
ALLOYS WITH
time scale for commercial return and that financial support had been withdrawn
ADDITIONS
before this had been achieved.
R.N. Wright et al (Idaho
REACTION
PROCESSING
MATERIALS
INDUSTRY
ing Laboratory, Idaho, USA.) ,I. Materials Science, Vol 28, No 8, 1993, 2040-2048. The effect of quenching Fe:r AI-Cr alloys
IN
HEAVY ALLOYS
OF CHROMIUM National
Engineer-
Labora-
J. Kellie, J. Wood (University of Nottingham, Nottingham, UK) Materials World, Vol 3,
from above 550 C on the microstructure and mechanical properties was investigated for two alloys in the range 2 to 5%Cr. It is
tories, Richmond, Washington, USA) Mater. Manu$ Process., Vol 9, No 6, 1994, 1115. 1126.
No 1, 1995, 10-12. The use of reaction processing to introduce ceramic particles into alloys is
reported that optimum alloys with an elongation brittle fracture mode.
W.E. Gurwell
(Pacific
Northwest
processing yields of 2O’X but with a
MPR April 1995
39