unit -2 cutting-tool materials.ppt

7/25/2019 unit -2 cutting-tool materials.ppt

1/23

BASIC REQUIREMENT (PROPERTIES) OF A

TOOL MATERIALS

HOT HARDNESS WEAR RESISTANCE

TOUGHNESS AND STRENGTH THERMAL CONDUCTIVITY CO-EFFICIENT OF FRICTION CO-EFFICIENT OF THERMAL EXPANSION MACHINIBILITY AND GRINDABILITY


2/23

CUTTING TOOL MATERIALS

HOT HARDNESS OF SEVERAL TYPES OF TOOLS:


3/23

TYPES OF CUTTING TOOL MATERIALS

CONVENTIONAL CUTTING TOOL MATERIALS

High Carbo S!""#

High S$""% S!""# Ca&!-Coba#! a##o'& (Sa!"##i!") C"*"!"% Carbi%" C"ra*i+& CERMET Dio*o%


4/23

TYPES OF CUTTING TOOL MATERIALS

ADVANCE CUTTING TOOL MATERIALS

Coa!"% Carbi%"& CBN PCD UCON M,#!i Coa!"%

S,$"r Coa!"% A##o'


5/23


HIGH CARBON STEEL

Carbo $"r+"!ag" -./ !o 0.12

O#%"&! 3o4 !oo# *a!"ria# Lo4 Ho! Har%"&& Ma5i*,* C,!!ig S$""% 6 0 *7*i Ma5i*,* T"*$"ra!,r" Li*i! -81 9C S,i!ab#" :or Lo4 C,!!ig Lo4 Co&! U&"% :or !a$&; %i"&; ha+3&a4 b#a%"&; ha% %ri##&; 4oo%

4or3ig

!oo#& "!+.


6/23


HIGH SPEED STEEL (H.S.S)

T-S"ri"& M-S"ri"&

(T,g&!" T'$") (Mo#'b%",* T'$")0/ - < - 0- .=1 > 6 > 6 < - 8

W Cr Va C W M Cr Va C,!!ig &$""% ,$ !o ? *7*i Ma5i*,* Li*i!ig T"*$"ra!,r" 1>9C L"&& Co&!#' E5+"##"! !o,gh"&& Wi%"#' ,&"% i i%,&!ri"& a& a &o#i% Too# #i3" :or* !oo#; %ri##;

*i##ig +,!!"r&; "%*i##; r"a*"r&; Broa+h; Sig#" $oi!+,!!ig !oo# "!+.


7/23


CAST COBALT ALLOYS (STALLITE):

9C C,!!ig S$""% -< HRC Lo4"r !o,gh"&&7bri!!#" Li*i!"% &!r"g!h U&"% :or :ro* !oo#; Ma+hiig +a&! a% *a##"ab#" iro.


8/23


CERAMICS:

A#8O?@ MgO; Cr8O?; SiC; TiO; TiC

2 02

High abra&i" o: 4"ar R"&i&!a+" L"&& !"%"+' !o 4"#% !o *"!a# V"r' high +o*$r"&&i" &!r"g!h V"r' high ho! har%"&& High r":ra+!ori"&& 6 0/ 9C High C,!!ig S$""% -8 !o


9/23


CEMENTED CARBIDES (TUNGUSTAN CARBIDE):

Plain Tun!"#n Ca$%i

W C Co

2 BINDER Ma,:a+!,r"% b' Po4%"r M"!a##,rg'

Grai &i" 6 0 *i+ro !o / *i+ro

2 o: Co -? !o 082

Ma' "ri!' +a b" $ro%,+"% b' +o!ro##ig

grai &i" a% 2 o: +oba#!. Ma+hiig o: o-:"rro,&; o-*"!a##i+ a% C.I

Drawbac is its

!ffinity with

steel


10/23


CEMENTED CARBIDES (TUNGUSTAN CARBIDE):

S"##l G$a (T$i'l#) Tun!"#n Ca$%i

W TiC TaC Co 012 02

High har%"&& a% 4"ar r"&i&!a+" Ma5i*,* #i*i!ig T"*$"ra!,r" -08 9C Vario,& Sha$"& O: I&"r!& C,!!ig S$""% -0 *7*i High Too# #i:" High +o*$r"&&i" &!r"g!h High $ro%,+!io ra!" B"!!"r &,r:a+" i&h

Drawbac is its

!ffinity with

steel

VARIOUS SHAPES OF INSERTS


11/23


DIMOND:

Har%"&! &,b&!a+" BHN = High h"a! +o%,+!ii!' (T4i+" !h" &!""#) High ho! har%"&& 0>1 9C High 4"ar r"&i&!a+" V"r' #o4 +o-"+i"! o: :ri+!io High +o*$r"&&i" &!r"g!h High +,!!ig &$""% (? !o 0 *7*i) High !oo# #i:" U&"% :or +,!!ig har% *a!"ria# #i3" g#a&&; $#a&!i+

C"ra*i+& a% +"*"!"% +arbi%"&. U&"% :or !,rig a% %r"&&ig 4h""# o: gri%ig 4h""#

U&"% :or *a+hiig o-*"!a##i+ a% o-:"rro,& a##o'

Limitation:

High rigidity of setup is

re"uired#Poor shoc and impact

resistance

$ %ot suitable for ferrous

materials


12/23


COATED CARBIDES:

Coa!ig o: *i+ro !hi #a'"r i&"!& *a%" o: !,g&!" +arbi%" Mo&! +o**o#' ,&"% +oa!ig *a!"ria#& ar"

Ti!ai,* Ni!ri%" (TiN) Ti!ai,* Carbi%" (TiC) Ti!ai,* CarboNi!iri%" (TiCN) A#,*ii,* O5i%" (A#8O?) i+roi,* Ni!ri%" (rN)

Ti!ai,* A#,*ii,* Ni!ri%" (TiA#N)

M"!ho%& o: Coa!ig& - Ch"*i+a# Va$or D"$o&i!io (CVD) - Ph'&i+a# Va$or D"$o&i!io (PVD)


13/23


SUPER COATED CARBIDES :

UE>8 :or &!""# !,rig D""#o$*"! b' Mi!&,bi&hi

Ma!"ria# UE101 :or C.I T,rig Cor$ora!io; Ja$a i 8

WC- High"r i!"rior Har%"&& a% !o,gh"&& Tri$#" #a'"r +oa!ig

I"r #a'"r 6FCCN (Fibro,& Cr'&!a##i" Carbo Ti!ai,* ) Ba#a+" b"!4"" 4"ar r"&i&!a+" a% :ra+!,r" r"&i&!a+" O,!"r +oa!ig 6A#8O?(Fi" Grai) o,!"r *o&! #a'"r 6 S$"+ia# #a*ia!"% Ti!ai,* A##o'& S,$"rior high !"*$"ra!,r" &!r"g!h.


14/23

COATED CARBIDES:

A&an"a#!:

High ho! har%"&& Ch"*i+a##' &!ab#" High +,!!ig &$""% -01 !o 81 *7*i High Too# #i:" (8 !o ? !i*"& high"r !ha +arbi%")

A''lia"i*n!:

Wi%"#' ,&"% :or high &$""% *a+hiig Pro%,+!io o: !,rig a% *i##ig o: &!""#& a% C.I Ma+hiig o: "r' har% *a!"ria#& U&"% a& i&"r!&


15/23


MULTI PHASE COTING

O,!"r *o&! #a'"r &$"+ia##' #a*ia!"% b' !i!ai,* a##o'

S*oo!h &,r:a+" &!r,+!,r" a% high +h"*i+a# &!abi#i!' T4o o: !hr"" #a'"r& o: ario,& +oa!ig *a!"ria#& !o g"!%"&ir"% Pro$"r!i"&

High &$""%; +o!i,"& +,!!ig 6Ti+7 A#8O? H"a' %,!'; +o!i,"& +,!!ig 6TiC7A#8O? 7 Ti Ligh! i!"rr,$!"% +,!!ig 6 TiC 7 TiC @ TiN

TiN - Lo4 :ri+!ioA#8O?6 High !h"r*a# &!abi#i!'

TiCN 6 R"&i&!a+" !o Ka3 a% +ra!"r 4"ar


16/23

UCON Ni!ri%"% r":"+!or' *"!a# a##o' %""#o$"% b' Uio Carbi%";

USA. Co*$o&i!io 12 +o#,*bi,*; ?2!i!ai,* a%

82!,g&!" a% +o!ai o +arbi%"&. Har%"&& 81-? i+3"r&. Ma,:a+!,r" b' +a&! i!o igo!& a% ro##"% i!o &h""!& a%

!h" +,! i!o &!ri$&. Wi!h&!a% "r' high !"*$"ra!,r". U&"% a& !hro,gh a4a' i&"r!&.

E5+"##"! !h"r*a# &ho+3 r"&i&!a+"; High har%"&& a%!o,gh"&&. E5+"##"! r"&i&!a+" $roo: !o %i,&io a% a%h"&io 4"ar. ?-1 !i*"& *or" !oo# #i:" !h" +o"!ioa# +arbi%". C,!!ig &$""% rag" o: 81-1 M7Mi o &!""#& o: 8 BHN


17/23

A''lia"i*nR"+o**"% :or ro,ghig; &"*i ro,ghig a% i&hig +,!&i !,rig; :a+ig a% borig.

U&" :or &!""# *a+hiig gra%".


18/23


CUBIC BORON NITRIDE:

Sai!i"% ar!i+ia##' *a%" ,%"r high $r"&&,r" a% high!"*$"ra!,r".

S!ab#" ,$ !o 0C !"*$"ra!,r". Ma,:a+!,r"& ,%"r ,#!ra high $r"&&,r" a% high

!"*$"ra!,r". E5+"##"! i +h"*i+a# a% !h"r*a# &!abi#i!'. Har%"&& "5! !o a!,ra# %i*o%.

A''lia"i*n!:

P"r*i!& high :""%& a% &$""%&. Aai#ab#" i #arg" ari!' o: &ha$"& a% &i"& i i&"r! :or*. U&" !o !,r bor"; :a+"; groo" a% *i## %i+,#! !o *a+hi"

*a!"ria#&.


19/23


CUBIC BORON NITRIDE :

Ma!"ria# R"+o**"%"% :or +,!!ig 4i!h CBN A##o' S!""# (/ R+) Carbo Too# S!""# (/ R+) Di" S!""# S (/ R+) High S$""% S!""# (/ R+)


20/23


PCD:

S'!h"!i+ haig %ia*o% *a!ri5 &!r,+!,r". Si!"r"% ,%"r "5!r"*"#' high !"*$"ra!,r" a% $r"&&,r". High i ,i:or* har%"&& a% abra&i" r"&i&!a+" i a##

%ir"+!io. V"r' high !oo# #i:" +o*$ar" !o +arbi%" !oo# (1 !i*"&). Sho+3 r"&i&!a+" i& *or" !ha a!,ra# %i*o%. Co&i&!"+' i 4"ar r"&i&!a+".

Aai#ab#" i #arg" "ri!' o: &ha$"& a% &i"&. Di&+& a& #arg" a& 1/ ** i %ia*"!"r. B"!!"r !h"r*a# +o%,+!ii!' !h" a!,ra# %i*o%. Lo4"r +o&! !h" a!,ra# %ia*o%. U&"% :or *a+hiig *i##ig; !,rig; grooig; :a+ig a%

borig.


21/23


TOOL+,OR- CHEMICAL OR ADHESIVE INTERACTION SEVERITIES:


22/23


TOOL MATERIAL OIDATION AND STRUCTURAL

CHANGE TEMPERATURE RANGES:


23/23


REFERANCES:

$ro%,+!io T"+ho#og'- HMT

Th"or' a% A$$#i+a!io o: M"!a# C,!!ig b' Tho*a&Chi#%

Pro%,+!io T"+ho#og'- a#$a3 Jai Pro%,+!io T"+ho#og' 6 P.C.Shar*a Pro%,+!io Egi""rig a% S+i"+"& 6 B' Pa%"' a%

Sigh M"!a# C,!!ig 6 Mi#!o Sa4

unit -2 cutting-tool materials.ppt

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