soft and hard soldering +brazing

8/19/2019 Soft And Hard Soldering +Brazing

1/28

SOFT ANDHARD

SOLDERING+BRAZING


2/28

WHAT IS SOFT SOLDERIN

Soft soldering is a !i"# $et%od of &oining$ost $etals s!"% as "o''er( )rass( tin'laand steel* An e"e'tion is al!$ini!$*

T%e 'ro"ess is )est "on,ned to lig%t fa)ri

-%ere &oints are not s!)&e"ted to %eat an.i)ration and so do not need to )e .er/ s

Soft solder is an allo/ $ade fro$ .ar/ing'ro'ortions of tin and lead -it% anti$on/


3/28

SOFT SOLDERING

T%e $elting 'oint .aries a""ording to"o$'osition( ranging fro$ 012 to 345 de6entigrade*

T%e solder !sed for ele"troni"s "ontains $

tin t%an lead( $a#ing it 7o- $ore easil/ alo-er te$'erat!re*

T%e solder for tin'late or 'l!$)ing "o''e-ater 'i'es "ontains $ore lead t%an tin*

$elts at a %ig%er te$'erat!re and sets %


4/28

SOFT SOLDERING FL89ES Fluxes( a.aila)le as li!ids( 'o-ders or 'astes( %a.e )een s'e"iall/

de.elo'ed to 'rote"t t%e "leaned s!rfa"es fro$ oidation d!ring %esolders onl/ sti"# to "lean $etal* T%e 7! also %el's t%e $olten sold7o- freel/ )/ )rea#ing do-n s!rfa"e tension*

Active fuxes ;e*g* )a#ers< 7!= "ontain >in" "%loride -%i"% "%e$i""lean t%e s!rfa"es* Ho-e.er( it is %ig%l/ "orrosi.e and $!st )e -asi$$ediatel/ !'on "o$'letion*

Passive fux are non@"orrosi.e( )!t t%e/ onl/ 'rote"t and do not a"lean* an ea$'le is t%e $!lti@"ore solder !sed in ele"troni"s( -%i""ores of resin 7! r!nning t%ro!g%o!t its lengt%*


5/28

OINING RO6ESS

In 're'aration for soldering t%e &oint s!rfa"es $!s"lean* 8se a s!ita)le a)rasi.e ;e*g* e$er/ "lot% o-ool= and a.oid to!"%ing t%e area* In t%e &oining '"lose@,tting &oints are essential to ens!re t%at t%e"a'illar/ a"tion !nites t%e s!rfa"es*

A good solder &oint de'ends on

A clean surace,

the correct fux

appropriate heat


6/28

OINING RO6ESS T%ere are se.eral -a/s of a''l/ing t%e ne"essar/ %eat and solder

An ele"tri" soldering iron is "leaned( -%ile %ot( !sing a -et s'onget%en Ctinned< -it% a t%in ,l$ of solder* Or t%e &oint is s-eated( )/ t)ot% 'arts of t%e &oint ,rst*


7/28

WHAT IS HARD SOLDERIN

Hard soldering is $!"% stronger t%an soft soldeand re!ires %ig%er te$'erat!res*

Soft solders $elt at aro!nd 355 degrees 6( -%et%e lo-est $elting 'oint of %ard solder is 34 d6*

T%e 'rin"i'le of lo"al allo/ing and !sing a 7!re$ains t%e sa$e*

T%e etra %eat re!ire$ent is s!''lied )/ !singgasair tor"%*


8/28


9/28

OINT REARATION

ro'er &oint 're'aration isi$'ortant and t%oro!g% "leaningis ne"essar/ -it% t%e a''li"ationof an a"ti.e 7! "ra$'ing t%e-or# -it% soft )inding -ire*

A s'e"ial eas/@7o< 7! is !sedfor t%e lo-est $elting sil.ersolder( -%ilst $edi!$ and %ardgrade solders !se a )ora 7!;CTena"it/


10/28

SOLDERING THE OINT re@%eat t%e &oint -it% a gentle 7a$e( t%en "on"entrate to a s$all

7a$e to a"%ie.e a d!ll red %eat* Solder 7o-s to t%e %ottest 'art( ft%e 7a$e along t%e line of t%e &oint*


11/28

WHAT IS BRAZING?

Bra>ing is a $etal@&oining 'ro"ess -%a ,ller $etal is %eated a)o.e $elting'oint and distri)!ted )et-een t-o or "lose@,tting 'arts )/ "a'illar/ a"tion*

,ller $etal is )ro!g%t slig%tl/ a)o.e i$elting ;li!id!s= te$'erat!re -%ile'rote"ted )/ a s!ita)le at$os'%ere(!s!all/ a 7!*


12/28

BRAZINGBra>ing is a te"%ni!e si$ilar tsoldering( e"e't t%at "onsider%ig%er te$'erat!res are neede

Bra>ing s'elter is an allo/ of "oand >in" ;)rass= and $elts in t%15115 degrees 6entigrade* res!lts in a $!"% stronger &oint)rass is stronger

An air )lo-n

;)ra>ing= gas tor"%is needed to$aintain a %ot7a$e* T%is does "reate ali$iting fa"tor($a#ing it too %ot to

!se -it% )rass and "o''er( )!t itis ideal for $ildsteel*


13/28

OINT REARATION oints do )ene,t frointerlo"#ing( )!t t%eall )e -ired or %eld

to allo- for e'ansi%eating* 8se a 7! -or a 'ro'rietar/ )raCSift )ron>e*<


14/28

HINTS FOR HARDSOLDERING T%e &oint area $!st )e t%oro!g%l/ "lean and 7!eAllo- ti$e for s'elter or solder to 7o-( $elting on%ot $etal ;not in t%e 7a$e=*

re@%eat gentl/( a.oid too ,er"e a 7a$e -%i"% $ig)lo- a-a/ 7! and s'elter or solder*

S!rro!nd -it% ,re@)ri"#s to re7e"t all 'ossi)le a''

%eat*Hea./ se"tions -ill re!ire t%e $ost %eat( at leastred*

aintain t%e %eat on t%e &oin( !ntil t%e s'elter or s7o-s t%ro!g%o!t t%e &oint*


15/28

ADANTAGES OF BRAZIN

It is "ost@ee"ti.e* T%ere is .er/ little )ra>e allore!ired to 'rod!"e a )ra>ed &oint* Wit% 'ro'erdesigned &oints( t%is #ind of )ra>ing -ill "o$'arfa.ora)l/ -it% an/ ot%er $etal &oining $et%od*

T%e &oints 'rod!"ed are strong* Engineers anddesigners fre!entl/ re!est strengt% data of ),ller $etals( $a#ing t%e ass!$'tion t%e )ra>ed-ill onl/ )e as strong as t%e )ra>ing ,ller $etalS!r'risingl/( de'ending on t%e )ase $aterial('ro'erl/ $ade )ra>ed &oints -ill e%i)it tensile

strengt%s far greater t%an t%e ,ller $etal*


16/28

ADANTAGES OF BRAZIN

T%e &oints 'rod!"ed are d!"tile( a)le to -it%sta"onsidera)le s%o"# and .i)ration*

T%e &oints are generall/ 'rod!"ed easil/ and !

It "an &oin dissi$ilar $etals -ell* Jo! "an easil/

$etals -it% -idel/ dierent $elting 'oints* It "an &oin $etals -it% .astl/ dierent "ross se"For ea$'le( &oining 5*554@in*@t%i"# "o''er foil tin*@t%i"# steel 'late -o!ld )e a "%allenge to -erelati.el/ eas/ to )ra>e*


17/28

ADANTAGES OF BRAZIN

oints %a.e e"ellent stress distri)!tion and %eat transf)ra>e ,llet for$ed is ideall/ s%a'ed to resist fatig!e* It %ig%l/ ada'ta)le to a!to$ation* T/'i"al a!to$ation $ein"l!de tor"%( f!rna"e( ind!"tion and resistan"e %eating

It is essentiall/ a one@o'eration 'ro"ess* T%ere is seldoneed for grinding( ,ling or $e"%ani"al ,nis%ing after t%is "o$'leted* T%is is 'arti"!larl/ )ene,"ial for asse$)l)e 'lated*

T%e &oints .irt!all/ $a#e t%e$sel.es )/ "a'illar/ a"tion"o$'le geo$etries are as eas/ to &oin as si$'le geo$


18/28

REFLE6TION

Bra>ing -it% sil.er@"ontaining ,ller $etal ee"ti.e $eans of "reating strong( lea#ti

&oints on a di.erse gro!' of )ase $etals* "learl/ !nderstanding t%e 'ro"ess( its

f!nda$entals and %o- to a''l/ t%e$( it "a "ost@ee"ti.e and relia)le $et%od of$an!fa"t!ring $etal@to@$etal &oints*


19/28

THANK JO8FOR LISTENINGHAVE A NICE AFTERNOON


20/28


21/28


22/28

2* T%is 7! ;e*g* )a#ers< 7!= "ontain "%loride -%i"% "%e$i"all/ "lean t%e

s!rfa"es* Ho-e.er( it is %ig%l/ "orrosand $!st )e -as%ed o i$$ediatel/!'on "o$'letion*

* T%is 7! are non@"orrosi.e( )!t t%eonl/ 'rote"t and do not a"t!all/ "leaea$'le is t%e $!lti@"ore solder !sedele"troni"s( -%i"% %as "ores of resin r!nnin t%ro! %o!t its len t%*


23/28

4* In t%e &oining 'ro"ess "lose@,tting &are essential to ens!re t%at t%e a"tion !nites t%e s!rfa"es*

* W%at t/'e of soldering is $!"% strot%an soft soldering and re!ires %ig%

te$'erat!res?


24/28

* W%at is t%e lo-est $elting 'oint ofsolder in degrees 6?

1* W%at is t%e lo-est $elting 'oint ofsoldering in degree 6?


25/28

P* Is so "alled )e"a!se %ard solder"ontains sil.er allo/ed -it% "o''er a

>in"*05* W%at is a $etal@&oining 'ro"ess -%

a ,ller $etal is %eated a)o.e $'oint and distri)!ted )et-een t

$ore "lose@,tting 'arts )/ "aa"tion* T%e ,ller $etal is )ro!g%t sa)o.e its $elting ;li!id!s= te$'e-%ile 'rote"ted )/ a s!


26/28

P* T%is is i$'ortant and t%oro!g% "leaning isne"essar/ -it% t%e a''li"ation of an a"ti.e 7!"ra$'ing t%e -or# -it% soft )inding -ire*

05* W%at is a $etal@&oining 'ro"ess -%ere)/ a ,$etal is %eated a)o.e $elting 'oint and distri))et-een t-o or $ore "lose@,tting 'arts )/ "a'a"tion* T%e ,ller $etal is )ro!g%t slig%tl/ a)o.e

$elting ;li!id!s= te$'erat!re -%ile 'rote"ted s!ita)le at$os'%ere( !s!all/ a 7!?


27/28

00* Is so "alled )e"a!se %ard solder "ontains sallo/ed -it% "o''er and >in"*

03* T%e for a 'arti"!lar a''li"ation "%osen )ased on its a)ilit/ toM -et t%e )as

$etals( -it%stand t%e ser.i"e "onditionsre!ired( and $elt at a lo-er te$'erat!ret%e )ase $etals or at a .er/ s'e"i,"te$'erat!re*


28/28

02@04* Gi.e t%ree ad.antages of )ra>

soft and hard soldering +brazing

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