Soldering - Medicine Lecture Note

Process of joining 2 components of a metal appliance by melding the Solder, C lowing "it into the gap blues the parts & Solidilung it ar a filled (- It is a process of building up localised alla, with "melal a of joining 2 of mou metal parts by heating them to a terop below theit Solidus temy & filling the gap blue there with a molten filler. Suitable alloy having lowell fusion temy. Soldering, ligtemp of filly <450°c - Blazing, lig temp of lillet> 450°2 Ideal repcirement of solder (Bearing filles) Bio people 1) Biocompatible (high callos ion les instances ( nos Carcinogene, Same colove od (2) Mechanical respect:- Large tensile strength, at best equal to parent metal... (3) Good bunds bund strength with parent metal (4) Thumal fusion temp east 50-100°C below that of puent metals San Loft at the basin metal (5) Easy flow-flee flow. (6) should not cause pitting by absorbing gaves is in sudes. (7) diastolic: same colour ad basis mutual (8) sthers: quile rafe procediece. Bearing floxes B Antifluxes. Flux (lladio work, meaning flow) applied to the bass metal sustan to wel the stares of hearing & assist the flow of solder lig Proted the siding suetavefrom. Oxidados. Reduce the oxides on the surface Dissolve the oxides & impurity layer 3 types of flaxes Type I (receiveflon) TypeII (reducing flux) Type (dissolving flux) Type I:-(protective flux) When applied on the sueface and headed the borax present melts forming a thin protective lacu fusing glass layer, Covering the surface. →which protects it hom oxidation Type (Redwing flux) - Sodiono elaborate or its dehydrated fam borax lenders the oxides, lice CUD in HM, N, metal alloy surfaces Type(dissolving (sduend) flox)? Fluorides (lilu KF) can dissolve the oxides Cr, Co, and Niete formed on the Sultan I boxe metal alloys, and cause wetting. 1. comp of bearing borax flox for gold alloys Borax 5.5 puts Boric and 35 parle Silica 10 parts This is Pededinek leducing lux I compo of fluoride, fluxes for bese metal alleys KF 50-60% Boric and 25-30%. Borax 6-8%. K/Na laranates = 8-10%. This ir reducing to dissolving flue Both supplied ad Postcodes Paste in blueline/pelio jelly Lig suspensions Ple fluced of fused to bearing Sillas Before bearing procedure the flux is. waled melted & floveed to wet the to wet the sue lace are ad hooing -Thus flored ale a helps molles boosing files to flow to this entie alls. -To print the alloys Plowing to mollen be bearing unwanted allas and fluxes all axed?" Demarking lines can be done by lead pencil, or by appli a Suspension of Rouge (Fe2O3) of whwing ((acos) lo the areas. to be preceded prevents the molten bearing filles, crossing into this reg Hence region... before bearing, fiest apply the flex to the sul face & then and flux coating to the vowed areas. Cast my fluxes: Borde fluxes io puurdes lam can be sprinkled over the alloy, wale meting by a gar flame. - Flux help to melt the alloy sasily, crepe the lig alloy sueture clean kum oxides and pectect the lig fem oxidation Casting procedure. during Various types of mixtures f ail gas flames, elechical heaters, Infrared soveces. etc are used Ceas Bearing: Sp type of gas torches. with adjustments for gas ail (02) mixing Bleducing navdu poncıla lila itame are available. The meltin melling of bearing filleer becomes lasiep & farted if allele qax is mixed with ais of 02. The ques should have high flame temp as well of high heat content/calorif. valley ot propane gas fuel appears to ho the most suitable due to its high flame temp. Butang calorific values have similar properties I has become more popular can it is salable for quid welding of high wing palladium alloys → Oxyoutylene grax flame highest temp & templuckerbo in Released it large → hay he heat content. Rame it home. added to Hi ppd allog to mech panel lies. 12 gad lele ass d causes porosity