SCIENTIFIC ABSTRACT YUZHUK, V.L. - YUZVUK, V.N.

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CIA-RDP86-00513R001963310014-3
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December 31, 1967
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SCIENTIFIC ABSTRACT
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c ~!---,,~--~ :-- - _-~ , ; ~' ~ ~~ - .. - - ~ . - - . -- - ~ - '. .- 1 . " _--- . i -- ~ -'-. --- I"- " . L '- - -_. .--:- o'-- :~ .:. - .- - -- t ~ - ~~ !~ -, , - ": : - ---- 1- ;:- - 1 -: !:- -- - , 1~ ll,.-: - a - - -, .: , , I L, - - . - -% - ~. . , - - - :~ .--- :- . - :- - , -- , -- I .- - ~ , - . - ~!l - . - -.- - I . . . I 72 3, Fig. .1~~ acrOw,presal sped on,- test ~ikihj h berl a orm( Qnl,~- t st rt 1~ itureo Ori go -, So CODE SUBK DATE A/ '0 ard: 2/2, CODE: POI-O-0-5-6/65/46/O(i5lQ727/0737 ACC NRt AP6027169, BOURCE Pr ofemsor Doctmr,- ~.Dirvator-)-- it 'Pti-Wialik, M. (PrGfeffsar, Doztor, Mrector), _Pygzkn, 'ht. - Taylpm, 21,, DV0Z!Id7dj, 'NI. J1 - Ore, a. j est6, ~.,A. K_rZ0jjIQL, i& 14- Lem li~-Tolutzh, A. Stanq tqlr I SUuIG$ek, Ya. ~~ayx2, biiikt 'T. ANT Sil a: ..1-01piggal chemish.-y' usft~ Zahrm-RoIcItill ptlaut Clinlilt[ riziologicane-i SI. AM); AA1, Zabreze-10ILdUilea (Zodda-d Fizyki Lekars~iej SI. &A-1) .i Z -XITLE -of Sonic 'did, ultrasonic: ffalda on btachemf6 I proc'6600_91: - E ff("b,&. Ott 30MG: b1cod componwits, fa men.workbig*under noisy- c Ionditions., -ISOijkbE: Acta-physto oglea po. onica v.; .5, 1965- .727-1737 ------------- &kad-l&vlft~itt6ft-- "-d nabid. ISM MERSEUXUAMMON 69MMM-W RD I UO &si-wm=2%c gal 9t a h'" 0 & ca I Viol it oil 0 Gi 14 a 114.a a t., PA 4 a 0. 40 1 60 ~14 .4 3:1. :.1 I IS;- ell, -a 9 1~ 3 1k; Zest- a, m0 j A 'd 4- 1 *a a Iv V .91 Ha .a .3 a i ALIM xx 141 A-* ps itiste -1-OW44- 4.0 of* 14"01, ow ttt-Wit t be dccowow4 b Ow WA 90*. TIW AtOd i$ -%"tW &01 lp tbe,#-d too r 0 60 ItK 9- K- ft . * I a -DF -W-0- K- 4 1 4k 40 all* V 0 0 0104--a-0 w 0 I - -07 * # 10 AW If VC g iri-Ij lei ts 3F 41 0-8; 41. 4l 43 .10 ..-gas r 'WO'cag 14.0 Ul. U .0 A no "00 I.: -vjj. 4- 9Z CAU. a al :11 -C 0;: IS a 0 Sap p 4 V ;; ~ .0 ex IK~ a U 0 as 0,40)14 o 4.~ 'Ag 0 Up. 0 0 a As I :41 9A 10 jxf HN g1si E. g i 0.11 SOV/135i-.59-6-2/1 I , AUTHOR: Khrenov-- K.-- K, Membe r- Ac Iciences ((P~raine),, of a emy Poznyak, L-. Ao Candidate of Techni(',al Sciencel~,, YUz- venko Yu A Candidate-'of ~Technicjal Sciencegi gamo- l- S C f T did t hnic i ec encem an a e o a c T ITLE: -TQ.A'ttjrdq 6C7 Modificatio-n IOf --saam Aida by Tit-citium tho- ---Automati6 V1eld1ag--of--Med1U--m Ste0l FERT.GDICAL: Svarochno- Proizvodstvo,-1959, Nr 6, pp 6-8, (USSR) ye ABSMNOTo In Velding hIgh.carbon-content-steels. _t_ct1k;ks-and-______ ~ -are -structure d around the.' lding _teihOcirinjg 1_orme we zone. The difficulties are increased if ne tal is- heated before welding. It is sharn in 5ef I and 27. that in metal containi-ng- more th,un 0.16- -0.207a C-hydrate heat-fissures are formed.,~Ref 4 and represent the - -experiment ---of Antroducing fluxes,, of tit- anium ~~, allwainum into the welding -tub_by- eleo trode- ------- -- __ _ - wires,.- -- -In- r__e i s s hoTm the expierimextt.of re--_ - - --moving the -heat-'fi'ssures in cast stee. I with a high per., centage of C-hydrate (0.50-2.0 )---b ---introetuciiikt,---titanitai~-- Y5 ~ y _,___L__~:_Card_ -1/3 --by -06vodery- :essful. he experimeht was succ IM NET. SOV1135-59-6-2120 Features of Modification of. Seam Welds by Titar~ium in the.' Automatic: Weldi~ :6f-,Medium,Stee1 --However the resu t was no modification' but': an allay., Theatuthordiscusses~--the !influence! of-titaTdAnn -in-to the I - Ti - ___ welding tub by electrode-wires ark[ ceramic: iluxes. q0 series of nve- - - --- tions h - bee i - acc ompl ~ stiga ave I iched: 1Y.The introduction of various quantities of titanium by SN-0.8 -electrodes-in-welding-with AN --348A and AN-20 fluxes:; .2) Introduction of titanium by Sv-0.8--elec%-.rod(,,s-accorcli-ag --to- GOST -224,6--5-4--of 5 mn diameter, into weld * ag tub with :ks-l Cer ~e~sIF4C67,-_-Table-1 -and 2 --show- -tlut - ezici flu,, emical-"structure of - sedn-:metal --'and -the- presence oJ2 fissures.- _Afi~ Ph 0--to-graph--t- the semils is shown. In Photograph 2 the structiire of the- seams under influence of ceramic fluxes is ahown. rable A and 4 represent the , result -s.- of toughness :Lnvestiga tions. A6coidin_~ - to- -these,- modif ication maT be applied: 1) If the melted metal contains small hard-parts which canform, the c.enter of crystallization after cooling; 2) If a-small.quantity.of:admixture which~concentrate.s Card 2/3 at.the surf ace, when -crystallizing -and hinders growinE . -18( 5) 28 ~OV/l 25-5di 4 0.-2/16 -AUTHOR: ---- -Yuz7e,nko YuWA.-j Candidate --of Teabnical - Soiellces- IT -Aut 'fo em -4 r-AutovAtIa---an&, 8 oma tic..Welding _PBRIODICA1: Avtomaticheskaya 9varka, 1959t Nr,100 pp 9-18 (USSR, ABSTRACT.--.- -- The ertiole-describes--tha-~compositlion and- prOpertleet-, . .of unfused alloy (ceramic),fluxes for dura blo welding, -carried out on stools - of- -Type - Khl 2Tj, I - -R9 d -3 hV H 8j an K d? 8 by means of welding wire_Ty pes*Sv-;08 and Sv-i,08A, based on. work conducted in- the~la boratozy of the hiculty of welding at the- Kiyev-- P olyt6ohnio Institute.-'T"he-ooft- position of such fluxes can be divided Into7.3 Seotit)ns: part, usually made up of;;a bass; of 1) the sooriaceous' marble reduces - the-- amount - of hydrogen in-- thev welded meta1--by the---for-mation- of carbon dioxide on -heating,, i - I Ided to re and--- the- -other - component- -substance je- are --- no z. .:- ng- point and--the visoosity-of ~-the -s 1; ducq~the.melti la -Pigs-la-and --- 1 b - show -the --initial --struoture - of ' high-- chrome welding-with the use- of -high-- and- loir.-silicon slag respectively; 2)_ the deoxidizing part Of the -flux, Card 1/4 ,usually consisting of ferroalloys and contalLming acti- SOV125-59-10-2/16 Unfused Alloy Fluxes for.Automatio-and SOMI-Automatio. Welding ve reduoing-agerits.- (altminumo---titimium,,~-si~litcon) factors in, ens A ~xhich- -an essential, ur ng g6od welds and the absence of pores. The amount of titanium a!nA aluminum depends on the marble content and lfho concav- tration of carbon in the welded steel; 3) t1la alloring _part Pf the f lux,---which...usually- consists-of -thG app:ro---- -priate:-ferroalloys'and graphite. -Table I contains da- ta concerning the chemical composition-of-oaxamia fluxes iMldi liquid glasrzi (eleotrodo sedima -silicate, GOST 4419-48,--Clas9-A-)-A9- added- as -a binding 4gent (17-18% of the total weight of the ofia-Zge); ftble .2 gives the comp-osition-of the fluxes, the s.1loying and reducing parts varying according t -o the composition of the ferroalloy. -The chemical composition of' the welded metal is given 14_Table 3, andthen-the author goes on to enumerate the purpose of each flux. Pigs 2 and !I give graphs showing the-relation-between the ourreni;-- and the aro-volta e azd~thwrelative.f3 consumption 9 JLUX -ra a on between the weight of the welding f1tu: Card 2/4 and that of the eleatroda wirs),.which indicates that SOV/125-5910-2/16 Fluxes -for --Automatio--.and --- somi-Aut,o~tatia-Vo2ding------,,- a A -the welding-currenf -with-the-1voltage-, ll norease In: constant-.,'is~accompanied by a-deoliiie in the, relati.' ve flux consumption; conversely, &A.Inarease.in the voltage with the welding-current'oofistint, leads to aztepplng-up~'of the-relative.:flu:t-consuml)tl(on. Thei ~-chemical composition of--the welded:-metal~oaz~-,'there-. --fore only be~obtained-at-a given-relatiori beil;ween voltage and --durrefit. -- Permissible -,variatione-, in-- the welding parameters, - which do- not cause any gx9at clmn- gainthe ch -(3mi-oal composition of the welded. steel, are then disOlussed. Fig 4 gives graphs illuistrating, the abange In the contents of chrome depending on the arc-voltage-and--the composition of' the scortaceous ~part_of thealloy fluxes - .and-details-and figures are given in the text. The best a -onditions ofwielding -are given in-Fig-5 which shows Utat, with welding currents of over.,41o -amps, welding-must -be- Carried -out -,with 3mm- diameter wire, while~currents of up to 350-amps require,. 2mm --wire.-: Mention As, made -.-that the -Card 3/4 chemical composition. of the welde-4i - metal is, 'best kept, J -41f114 25/60/000)'95/1 ~3/01-5--. as of Nechanized Platting in N ntl All'Uniow,Conference on Proble 0 ..01.*rous Welding Department in the,-"Tsvetmetr_works in Artemovdkj r*&d-!)ne.,on "Expe rience.with P actice'l:Applioation of Plating for Pressing -Tools an d Machifte- Parts" ,--The __techniques, ~ diaoussed ~Veres -wadd.-p1ating, jinder flux with band electrodes; weiiafng pipas - by: radio- f fe.quoincy Ourrefits; weldirq. by electron,ray in. a chamber.with controlled I atmoopherej---welldl ng by --_-'electrosla g -romq -It was at ted that though: meohanical 1)lating haii :---made good- progress in_ikon-wo'rko,-it- is- not, _y#t suffioiently used in non,- ferrous.metal workag, for surfacing hot rolling milL rolls i --Ori~cte. wheel-13, etcol''as it a--l ready prectioed at 38 metal urgies! works iti,the USSR. Many.works do-not yet use 1he prooess,.developed by, the Elsat.;ric Welding Institute,-for-resto ring press tools, by fusing powder wir e in : Carbon dioxide -medium. The "Tavotmentq--works-in Artemov*vsk saved over I million rubles and 46 tons of - tungsten.and nickel, alloy steel in -1959,-'by using meohanical ~plating-_for -parts and-pressing tools. -,Extensive sipplicition Of slag, -remei ting- -of, too-l'- steslo-_~ inoluding- scrap is,bac6lving_ important. it-reduces caAi&i_m6ntin1.f ormity- 6t -steel. and its, sat ation :with gss~ -and- ur dontaminatioiaj, with sljag~_Inolusions. The coifer4nds recommehiled.organizing FMU&W1M%'6A= gig g wwa~. 3/195/61/000/00%1016/016 A16tA127 AV=# v.Uavonko, VU, A, Tp A. oonferenoe -of the wolders otthe 4orlkly obltstl IMODWALir- Avtowatl6heskawivarka* no, 50 196i, 95 96 Id, - -__iTL Ja -nu a ry 196 V-1 Idy-to divoitiss -the _----~A-bohferqncIs -was -convem I-Ah--do 7- pl~p~;ems.of-further-d6velopment and-applicatiort-of.welding techniques. About 400 delegates WI!13~0 present. from the industry of-the 06rlklyoblaistf, Institut-elektro- _&A.rki-1m--Ye--O Pat6na- AN- USSR-- Mectric- Weldin - -institmtil IM. - Te. -0, Paton-AS- UkrSSR) , In3titut i~tetallur MR Unatitute of MetallurgyAS USSR),:VNnAvto- $I L -AN en aud other organizations. B..Ye. a, Academ-10-ish of thii AS.Ukr33111. rqport- _4 POO 9 ad on the --j63sent-'-state and- devpldpmeu~- of welding In the MSFI, - outlined the expect- --4d-d6V4l6pment-for-the-coming~20-y4sr~* and-mintioned the pro .e,Tess_of__pl9mts_in, the, Gort kly Economic Rayon (GAZ, If Krasnoye Sormovo," and other) ths~ applicat I on of new techniques and.,automatic welding lines, T. I Aping, -Deptity Chairman, of ()or* - ~Iy SoviiArkhois, reported: an -the -present. "state "of,weldlog teabxdques &M ttm pro- -spectis in- the industry- of the Smarkhoz,- vA desoribed-the m&coeas aohi"vd in Weldirig-at-tho-Oortkiy-Automobile-Plant and-the Paylova, Bus PlAutt, the-110vigatelt Card 1 5 ----------- J A, O-Woretwe. the'wa era of the Oortki Of obIALSt' A161,412.7 revolyutaii"Ilant ahd the "Krasnoyf iSormovo" Plant. Thia 0ori kI Automobl.la Plant :-has started'.producing welded,axles for new trucks frowitamped-elements, Which will considerably'riduce'the conaumption of metal. -, The -."Dv1gatell --revollutsiO Plant is r&pl$Lolmg-castinga--by-welded-o-tr4o e.g. the bane frame for a Dlesel.~ is'--produced by welding-rolled,-and-cast comporWritso and-thw- weight! -Is-redu~ed_by____.____ 1.400 ig (fr6m 3.300 kg). The total eased-by-38% *xIng. two,__ years. B. I. Medov-ar, Candidate of Technical Sciences (Eleotrio V91ding Institute Im Ye - 0 Paton) W-.)rmed - on now work an machine welding end electro-sLq; remelt- i;;,, n;w w"elding,wire and flux grades, for refractory steels and alloys, el.ectro- slag -welding -of large ring elements, -now techniques for weldliag bimetal sheets, and -a - new method of producing multilayer rolled stock- from welded and hant-faoed --billets,-S. 1. Rusakov.-Assistant Miet-Production Engineer of the GortkLy Auto- mobile Plant reported-on the-"Applioation and-Prospective Development oflieldIng at the Gort kly Automobile-Plant". The plant produoos-'236 000welded struotures-an- px~llyjl and welding is mechanized t9,94.5%. An assemblylm*ilding-line- for the--- - floor of "VolgO automobile body includes.t -hrde automtio.imalt,ispot resistance -welding machines welding 200 - 240 spots each; C02-welding vd.th semiautcoatio A.-547-m-P (A-547-R) -welders has- improved the quality of work, reduced waxj~aj;e,, doubael and tx4bled -the -productivity. A-now rearixiedesignis usol-for-new t:mi(jks Card 2/5 8/125/61/000/005toi6/016 A conference of the welders of1the dortkiy oblastl~ A162/A127 _hLs --loped the -technology, Tubeless -tyros- can-be used -for paj~kongsr.cars- due-t3. &-new method -of joi -thewheeL-disca t;rthe rim---by spot-welding. -Overall'utomation and mechanization has resulted In a -1,5times higher output- 'Miginser 0. 1. Naza- renko:told In his.ropert on "Eleotnm-Beasr(Welding'and Its"Prospeative Devolopment" Oe", what the Electric Welding Institute Im. Ye. 0 , Paton'* is d*lng in this f told, and guns- A L --on - industrial eleotron,-bsam w 7ilding biilo~ed bY the Mmstititteo- V. P,# Hyabin- kin,~ Assistant Chief Production _M*1neer of "Krasnoyd SormOvcO' described iho'w*2d-_,. Ing work at the, plant.- including ~wdrofoll ships.' Vankers, vea, and RR f74rr", b~ata; --Ghlp 416inent-cproducod by welding of stampings and castings, 'The pAmat-has started usine- ele-otro-slag welding for, ateel-tr uotur-es and ~ arzoa~ara- 091ding- for -djuml=m alloys. A welded hydrofoil Diesel ship for 300 pasa4*ers-As under oonstruction. TC-321 (TS-12),welders and single-pics welding. with forced formIxg of the rear side of welda,,#M raised the plant productivity-by -&-fabtor of 1.5 - 1.7, ~ -The - _.-mechanicAl-hard-fac, -Ing of-rolls has reduced the roll'oons6mption-by 50%. ,---his- ~re'mote wcontrolled MA0G(MDM)_:_gAs__butt1n-9 aut-o-mai;fos-i--Yu,--Ai-iftzveitko, -Can- didate of Technical, S*iencis,__rQpqzted on a-high-productive-him-facing mathod.de-, veloped at. the Electric Welding ltstitute im. Ye 0- 0. Paton, with the use *f band electrodes, And--ori-a-me thod of prod~oing wear-resistant bimetals consisting in rol- card it 511O.V9110001009'0161016 Aconference of 'the, welders of the (fortkiy oblazt' A161/A127 N,.K, Maksmov ~spoke on the -use of electeio welding ~R~ haid-fa;Ang for.the,facili- t W 'ies of the Gor reLi1road* Ralle; a" hsiAg- welded -into - 25 - 1i ~ lengths- a6l:. more -with -a', PPCXtl.(Rmm) resistance weldirg anchins' Worn roll enls-.exe being hard- facedi, V. A.-Patruniahev*N, Candideto of Teobnical Sciences, or:Institut inetallurgil . AN SSSR (Institutoof Metallurgy AS U33H) spoke of.tho'hlgh effoot of plazaa, aro In his -report on-ff.CuttIng and Welding 14stals-by- Plasma'Aro", M. -F, Karakwo Cand1date of 'recimloal Sciences,, reported on "Diffuslonyacwm Welding ot MOtals - and ~-Alloysll and,.-mentioned h1gh mechanical strangth of welds produced .In-blowtallio elements and alloys! Us described the CABY-1 (SM11-1) and CABY-2 (SM-2)'units for wsl~Ung - Ups- of hIgh-speed steel-, carbidea ;%nd coramets to toiA.shanka, The following re- ports have been also heard: V. A. Amnartsov, of Institut'metillurgii AN SSSR (In- -stitute-.0f metallurgy AS USSR)_ -'Mttrasonic weld1me; Maalh:qier V. A.-Kolobaxw - I'Advanced-WplAing-Kethodn- at tbe !Teplokhodt' Plantw;' Entineei- V.- R. ( j (P=)-. "Physical -impeotion-Kethods:1or Welded Joints; 'Enj;iqee'rV.V.-Yevseyev- "Dwolopment of Welding ~ at. tlxe Crashing Equipment Plantw; Ihkln~sr 1, Te, Yarma- kov.- Nelding at a Shipbuilding Plant] Engine-er 1. -7,: Tereldto* -of Mtlebikskiy meta,12ursicheski -zavod IftlebaU,Aetallurgical. Plant) "HML-Facing of Rolling Card 4/5 U 24782" D046ID113 AUTHORS? Yuzvenkof Yu.A., and Kirilyuk, G.A_ ~'MTITLZI Nechanized:opeware'surfacin'. 9 _PERIODICAL s AvtomatiAe okay& svarka, no. 81 19~)10 83 _When surfacing in shielding gases, diff icult'ies: are, encountered, in protecting,the gas'nozzle from-dropsof the liquid electrode matal. In this Ponnection, a delay in the surfacing process for the cleaning-lDf thenozzle is highly undesirable. Consequentlyp investigatio~a were condacted at the In'stitAt elektroavarki im, Ye.O., Patona, -(Electric We Ming Institute Im. Ye.o.-Paton) -on the compoeition,of_a powder mire for the openlare surfacing of -alloyed metal without- a flux or. shielding -gas. -The ahnlcal - compool tion metal deposit6d by-the powder wire vas as follows; O-50-O-55%C'_ 4-0-5--%_Ckt-7-3-00~4--o5% W,-0-3-0.6%_;~, 0-5-1.0% M-n, 0.15% Til Oo5% sip aria 0-4% S- Surfacing is conducted using ,do-co-- with reversed-polarity. Good. formation and sound coating-metal is obtained using the following .-200-500,amp,_23-26-v welding current and 15-50,m/hr wire feed. The wire composition includes alloys, slag and gas-shielding componentg, and elements Card 1/2 IM V_ )/EWP(t)/9Ti -Ijp(c) C SO Ar-6600a,-I~. URCS COOS:- UR/6125/66/000 105/0068/069 Shizanovsk~y, V. X I aLko A.~ Awraa: Yus vo, R!!Itrqe ~ORG.:, [Yuxvenko, Shimahovskiyi- %A nik) Institute of Electric WaAdingJa. Y e. 0. Patons, AN UkrSSR (In.stitut elektroavarki AN UkrSsa); [DaitriyeVI Combine for tile -Nxtraction:-andWocessin of-tha Ores of the Kursk,Hagaetic: Anom&l .y mIbLnat-po ~400 am: prevar"tice rud Kurskoy m!pL"oy a yc.-- Prolonglus the service life of the teeth of excavator buckets, loy kgIdLt*EL,_ them up vi ~wite th _poidered-M-tal electrode -69 -.SOURCE.* Avtotmatichaskays, sva%U, no 5, 1966, pp 68 TOPIC TAGSt powder '-metal i&re-,- -mankanese- -steel _,excovatini-machluer7j.. welding electrode, metal surfacing/PP-U25,017T-0 welding etleotrdde,, 013L it-adif EKG-4 wcoavating macl-dnery L ABSTRAM -service life of -bucket teethof 013L steel ~ra as from:.11 to 20 ditys The g -an operating conditLane-&-nd the hardness oU dependW thalzrock, being dawavated.- These testb valgb #4120 kg wwho and art amud ou'the:bwketa of 904 4 , awAvatars in this connection, the authors experimented with varlous'potterne of the beading of j .-Card 1/3 Mr - - 621-0191MO-210879.4 ~L 35612-66 ACC NRj AP6015250 the worn -.1ps of these teeth (Fig, 1) ad UsLag-PP-Mgbirr-O powdered-eetal. electrode Fig- L- -At Ignment--i )Ubesds-durf g build-is f P. ~.P~ teeth: numbors of bead-aligmunt -4 S ordinal patterns.. IMle 7 wire 3 =n thick as well- as -&-wielding -curridt of 240-260 sl"_4nd -a, weldlog voltagoe, of v.. The 6 of the beads in every cane:werim 12-15 40d LO-12 In,. width,and dep -up, .respectively. Four of the f Lve teeth an each eVertments-I bucket were, thus buill. the fifth-having been left aloas for purposes of comparicon" Volloldtig operatiall trials (excavation operations) the wear an the teeth was-comptredo I'Ludiags:' In all cases,, e3tc*pt__tha,,bika4 alignment pattern 3 . (Fig. 1) thin i build-up WIJW4 Is su;Pwrior to the pcovtously euploy*d COW6,con-itin-u-CU-41 bulld-up. mef;hod. The boat. results -,nr,e Card 213, L 35812~66 ACC: Nih Ap6o 15250- 0 produced by beading patterns, 7, 8 and-9: the saMce life Of the teeth'.1vas nearly -tripled. - Fig. 2. shows the teeth demounted from a bucket folloving th,eLr; opnett"J" the center tooth-had not-been built-up. Tests of built-up axes' W-itor-buckel. -7 -7- Fige 2* Teeth aftertests, conter t(*th y- not built-up (0;A"stest) teeth used to, e*xcavota-extTemely hard_ quartx1te rocks at-,the YuZhuoy1outhern Hining and Concentrating Combine have confi=ed, the -of fectivenevs of - this _uOtod. This simplicity of this method, based on unshielded welding wLth a poudeve.4-setal elec- trode, should be particularly,emphasized, since It does vat require Me use of shielding -gases- and -fluxes. All this warrants reco w-anding the wideapread Intraduc- -tion of this -nathod at enterprisi-s --of the ove-mining- snd_~bqlldlng valberials lodus- triaso Orige art.. has: 2 figures 1 table# -SUB COMM Ilt.13/ SM VAISs 13Dac65/ --3/ kV, - * A- tw,*- s6 - Af rok~~-w W 6 1, u 1 ; l t P P " v Z ZKI.V IVM-AV,~.A Tc~ pt high permcAd:" :Pd la-,- da-cuircr,' lows in hL fic(di wrf ih s ihcets of Mo r, rmailoy itre s=d, C-ccreve cf ' I h 1 ,cc t~-_ ]a= -r or Irms PLr 14 voi. 57 go, 676 ftug"'tic hard!. ji4mum magna - , "--t6LN , ~ ou-,m utffig t- g0irnonider Willi 4c, and dymmk wit, wnh it cr,o. Nn omcter tit (tequ6stk t of ES - ( -74 ~q(s 4t ta" (C. adt frcq=r-y cotTilm ois au op4im(fm uridp "Zsur(!(x