Document 440V9m1DXga81Be2DkQXpLGpG

LI A16417 ** 9 IB QPgfl<g E2& UAP BSSSL IB E s bl t ier au d zifstrrr z. l . nvH^'JSE, m. nXOUTED KTIALS CtTUZOi AMrlotn 3altiag cad Refining Coojazfy t WWWPW .1 III I $ i i y r r i \ i t t it . .W. ... -- ---asTM,a.rnrfiA^^ LIA16A13 Usf:^. im,*,*m>t.*ma i..Tfiii*Wb- TOZ QOTIflOr, TO tDJ 8HZZT LED WPE SOLDER uUP BA08nt laassa/ugmaiffi In order to fome**t tho future ot toad Shoot and load Pipe, ararcgo accthly ahi,o*sts aa reported by tfcs Letd Inriuatriaa Aaaodation hi-t o boon eiarlnad beck to 1930. Zt 1# intorooting to net* thi t tbo trend of ouch abipnaeto ll oloort ldaatloal with thet of tbo fodorsl fUserre Board Indox of Industrial pro duction, when ycru consider tho nultltud* of cow products that hur* oosO on tho ntrkat in tho loot doeoda that aro ooopating with, and sarrlng U, substitute# for land. T:ioe new product* hero boon introduood with such fanfaro by effectlm Lnd poraiatont noise organisations. In nosy instances, thooo now product* ham boon oTaraold oo a result of lech of perforaanoe exparlanca. low notarial# hors often displaced loud In a flash of clory, only to find tact lood regains it* foraor stature in wbat era apponntly natural* appllfe tloas. On* of tho aoet ooanoo natural" applic. tiona of lead Infolraf oulfttrie ccid equl asnt, vbara It la apparent that IsLd will oootinua to bold ito own cgt-tuct an oealauebt of non aaterlnlo. At on* tijo, stainless steels war* to b* tho p*TM"-- for all eorroalon problaoo. After a abort period of terries, bowrr-r, they war* replaced in oaay a plant by lead, tha fomar notarial that bed glam aarrlo* for each a long parted of tin*. Tbo incrscssd on* of land ca a rodietion shielding natorial will certainly tend to contribute to the <'.y nd for load abort and extruded shapes. Land ia tho hi tftent density aatcriel a Title.hie, ecsnardaily, ia lerje quantities at a nncinal cost, and also has additional advantags# ao a nwiintlon shielding oaterial, asking it tasiquo for this use. It doea not booaoo eontseluted by neutron cad gasan radiationj thua high grtde lecd ccn bs used oantirrucunly without boorusing rwdioectim or to anltter of ixaful radiation. J I bellere tbo masons for tbo continued wide use of laid sheet end pipe night bo ntnoarlsed cs followmi * Lora waimm or ns o j u x ill orgcale natorlals hnro cn oxtranoly high susceptibility to pin holing. This ia especially ao, not only with the faruah and spreyad actrrlnls, but also when they nro used in sheet font. It is c factor that requires rigid and continuous totting sad inspection. ^ In centrist, flboet lead onn bo depended upon to bo fires of pis boles to such an extant that this factor is rarely tested for, specified, or even considered, in tbo purctwue of lscd* sonamiacvjaai nofatia The euperior aechanical properties of lecd, no oontrusted with organia asterialo, am 0Imedi.- toly arldset to nay plant operator. Oanornlly, n bride lining nust bo used SO BI<!Ppy MWITPwnwn^fmpii IJM wj u mw^ i^wwp^wwwwwwp^irywiirpH^<l^i^www>wtfyw^^wi>Pw^^ i*pu*;mw m m if -"^ MW pup -i L IA 1642 0 .A.ia*sthr.i^^Maas&asaa^ p.-_f3t -mm 9 la rwdlator productloo, where luxe r,acnUUea of aoldar am oocrattf, thn da* of rvdlxtor* hu decreeend l b bo bh as yj%, but tho saount of aoldar used dapeods on the eo-oulled 'frontal ua1. This froctel ir, however, hu not dtenUii la elan, l t ij thus thn eaotnt of solder cud, per unit, hu not decreased. Althou^ a pood deal of research In being conducted oo nlialcta radiators, no noooodonl tad suitable MibeUtnte hna been developed. U loop on rwdlrtom oca bn aamfsetured eootral oc.Hy by soldering copper end brass strl>a vlth n ** solder, such processing dll bn used. la the cutoaoU.cn field, motaoue asperiaanta hero bona oooducted to nllulnntn thn use of body noldar. However, no ooonoalcnl way bn* yet bnao discovered to ansa* feature on sutoeoblln bo$r of good appearance dthout thn non of ooaveetlooal body filler util. Thn atabor of cere oo thn rood todey, tad the anUcipated Increased mrVr to oooe, vlll obviously increase thn **'<h <m rote, nad than inernonn thn deni nil for nom body nolder for repair purposes. Zb tba field of eea nenufeetaring, n pltsUe aubeUtuta for adder baa aide aa appearance, but It la doubtful whether lta ap/lleLUoo will extend aueh be/ond that 0 for noo-food usee. Omr a period of years, the Industry cad can nanufactumm been auceeedad la reducing the caoiat of solder used par euu Howarer, Z beliere that this unit uaa la now at a Ooa ether development, which la luterenting to note at tba pmsect Una, la tha uaa of printed circuits in tha alectronles field. In tha pant. It baa been **w"*r ^houA that this demlopcent would tend to aUnlnata tha uaa of Bolder. Bownrar, It appears that this la not the case end that a dipping adder vlll be rerulred. Ihlc operctloo vlll, no doubt, cut down on the use of adder por tstlt, but it 1s expected that tha rapid expansion of the Electronics Industry will sustain the total for adder la this field. In view of tha above, I believe that vn can expect a nuatcinnd daaond for noldnr aa long aa Autoaobila and Industrial Product!on oooUnues at pm#not, or near praaaat levels. Thn futum outlook for thn uae of babbitt la certainly not aa bright as it is far , O9 solder or load *ent end pipe. Tba developonnt of direct drive, roller bearings, and a aharp mductloo In bearing alloy thlejcanao have oil contributed substantially _ to a reduction la thn use of babbitt. f j.wpj,wMi![pwwiw^ -} .wgimi n piuiiuiiiu pyjiiwpMWiippppppwf1 'T ' ; L 1 1 m i iifcaninrV 'iwTnn ur*T 'ih ] >.- imW mh h m i niiiiril?i 'WIIHf f E W W W W i.l|ip .w w y | P J M IW IIWW W W W MW'M lu ll W-II '.M m > \ USLBSk $ la ^w and aarly poat-war utaoUlM, for aiayla, tha ha ring alloy thlcfcaa** par mlt b*erlA( v&> about .01$ lnchaa. In praaaot day astcaohll#*, tha baarinc alloy thletaaaa la an avwrv^a of .00$ Inch#*. thara urt, hovarwr, aco# owyanaat Inc factor*. Nuy ear* now htra a crantar nunber of eylladara, al(>t ba&ac tha oocrantlonal amber, vharaca, haretofora, there ware a crwctar nmbar of focr and tlx qrlindar onr*. Alao, vbila bearing or* abortar In praeaat day oura, thay aro larc*r in dloaater. In aplte of tha** fbeta, hcvwrar, Z would ortiocta that thar* baa baaa a daollna of - roughly - Jfi In tha aaa of becrla* allay* par odt aata aotiw* u*a froa pra war days* It la ulao eelf-ewUeot that tha naa of rollar bearing* ty a mnhar of railroad* ha* alao nada lnrocds on tha uaa of babbitt la thl* flald. Qcwrar, It nay ba re ported that a z&xabor of rorda ara oocrlaeed that rollar beerl&ip tit MOT tha aaaaar to bearing failures. Hany of that haw* dlaocrrarad that thay beta Just aa aaaj fkUura* with rollar benriiy* a* thay bat* with babbitted bearlnga. 0 la behalf of tha AaaodatiQe of laarloea Railroads, aarwrcl Reeaareh Institute* ar* today putting forth cocaldarabl* affort on tha study of tha oar bn Jxmal twarlnf for tha purpose of flnr.la* tha boat bearing aatal. It aoat also ba raanbarad that thara era approdaotaly 2,000,000 fratilrt acre la railroad aarrioa, * l*rs percentage of which ar* ualng babblttad bearings, sad that rrao If a change war* to ba atde, it would taka DanyJMr* for tha tranaltloa to tab* plaoo. In riaw of thaaa facta. It 1* ny boas and ballaf that tha Railroad* will Scotian* bo naa babblttad journal Marine* In d.sabla quantities. Altbougi 1 do not ballrra that a treat daal aay ba expected in tha dewalopaaet of naa uaa* for babbitt, I balirr* thct future ahl,wants will parallal tha industrial pro duction of tha oouatry. fOrthazaora, tha oaotlnswac* of reeeareh, which haa raaultad In a trsaandou* lneracaa la tha loud carrying ocpadty of babblttad bearings, aa wall aa in lneracaa In thalr raslatanca to fatigue failure, will ocrtalnly taod to holy suntain tha daaanrt for thla alloy. I 0 me** mi?" W J2il iP P ll*> P iP fl^^ | 'y | iv. 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