Патент USA US2125680код для вставки
Aug. 2, 1938. A, R, MacGREGOR ALLOY _ Filed Julie 1o, 1936 . .15 , 0 .|25V y .§10l ' .76 1.0 l 1.5 v . >_2,125,680 ì ‘ 8.0 Ö ` Bu y (Ittorneg Patented Àug. V2„ 1938 '- ~ í2,125,680" STATES 2,125,630 ALLOY _ _ Alpino mongool-oros, somt mno, ru; Application June 10, 1936, Serial No.- 84,577 1 claim. (ci. sti-_154) My invention relates to copper base alloys suit-_ f phorus. ' With alloysof this'type having a phos able for use in welding, brazlng, and soldering, phorous content >ranging up to’about 8.3 per cent, and relates particularly to ternary alloys of cop-â I have found that the most eiiective tin addition ‘ per, phosphorus, and' tin adapted to be used for is about 0.5 per cent, and that in substantially all Veases the maximum ductiJity-is obtained bythe 5 5 such purposes. ' ’ An vobject of my invention isA to provide an - addition of this amount oi tin. Good results _are ‘ also obtained by the addition of tin .in amounts from about 0.25 per cent to about 0.75 percent, A second object oi.' my invention is to: provide ' but additions of tin in amounts less than about 0.2 improved alloy i'or the purposes s_et forth herein above. ' ' ' y10 copper-phosphorus alloys having improved physi cal properties. ' » » ' _ «. _ ` per cent or more than about 0.85 per cent have « relatively little eiïeet» on the ductility oi the alloys as compared with additions within my preferred « ' _ Another object of my invention is to provide an‘improved alloycontaining copper and phos range. In fact, larger additionsl o! tin _may phorus, and adapted to use in welding, brazing, . result in alloys having greater hardness land " l5 filling, and similar processes. _ „ . My invention has for other objects such other advantages as are found to obtain in the alloys' described and claimed herewith. _ ' ‘lower ductility _than alloys of similar phosphorous 15 content to which no tin is added, as shown here .inbelova , ' l » . » The veffect oi tin on phosphorus-copper alloys . is illustrated in the following tables, which give the Brinell hardness values oi alloys, containing _20 peratures above their melting- points. Eutectlc ¿constant phosphorous\ proportions, as stated. alloys oi copper and phosphorus, _i'or'exsmpla varying amounts> oi’ tin, as stated, and the re It is well known that eutectic> alloys generally 20 have a relatively highl d‘egree of iiuidity at tem ‘ ‘ exhibit thlscharacteristic to a marked degree,` mainder` substantially copper; and such alloys have been used in the _past for ever, it has been found that the brlttleness and , low duetllity oi these alloys makes them unsatis _iactory whenvductile welds are desirable. Izllave found that thel addition oi tin in the rus 30 ‘ proper proportion to alloys oi copper and phos _ phorusresults in the formation o! alloys’having marked liiuidity'and at the same time - ~~~ ~ . ’ Time. i ggg-’giá itlslent Brlnell 25 brazlng, welding, and similar purposes. How - vunusual ductility and softness.' More specifi - - - cally, I have found that alloys comprising copper, _ _ 25 ,um 4.0 o to to 4.o to 0.5 1.o 1.o ao A 120 ' a0 10o 110 m 4.0 as 120 '-30 . phosphorus is less than or does not materially exceed that 1u the outeouo composition (obout'aa , Table II per cent) and containingtin in amounts les than :gêgä reagent nanou l per cent, are very satisfactory for use -as__ weld 40 ing* or braaing» media. These v 35 35 . phosphorus, and tin, in which the percentage oi in a - - . ' application. andiorm a weld or illling having vunusually high >d'uctility and softness, which al' _ lows them to be` _readily peened, machined, or _ 45 otherwise dressed in the weld. or elsewhere. Hy alloys, - furthermore,- produce a strong, dense weld .40 1o 7.o 1.0 0 0.25 0.50 .100 :a0 110 1.0 . 0.15 1an 1.o 1.00 1an 7.0 2.00 _ 14a 1.0 aso los ’ 45 . or braze capable o! resisting high pressures, both . Table III gaseous 'As stated and liquid. hereinabove, my _ preferred _ . _ alloysmi 5o coppenphosphorus; ansiv tin contain not more _ than about 8.3'per eentphosphorua'and'l have found that -a phosphorous content o_i about 6.5 to 7.5 per cent is especially desirable >for general use Perce t l as as m suitable proportions in oooordsuoeyitnmy'm ‘ ; >vention is also advantageous withfeopper Ialloys, containinghighe'r and lowerpercentages o! phos phorus. however, and 'I have" found >that especially. " ' -ductile welds are obtained' by :the _use `ofE an ` o0 ano'yrooutoiuiug about ‘iI or taper oeut phot ' . ' 50 „£15 -pungent hernan VAo _ » 21o 0.25 s.: 0.a0_ s.: 0. '1s as 1.00 8.a _ 100 _ _son » _» 11s - 55' m4' , an . ma ~’rho ¿uovo moet 'ure plottedlu m. 1 or the ’- accompanyingdrawing. results on 2 annoso are obtained when other percentages o! phos phorus within the preferred range (from about 2 loys because of their fluidity, ductility, searching per cent to about 8.3 per cent) are used. _ I am aware that alloys of copper and phos phorus are known to the prior art as welding and brazlng media. as disclosed, for example, in U. S. In addition >to their improved ductility, I have also found that alloys of my preferred composi tions have melting polnts considerably lower than that of the eutectic copper-phosphorus alloy, and are therefore more readily employabie for weld ing, brazing, soldering, ñllins, and the like. For 10 example. I have found that the ternary alloy containing 'l per cent phosphorus and 0.5 per cent tin with the remainder substantially copper begins to melt at approximately 631° centigrade, with pronounced periods of arrest in the cooling 15 curve at approximately 634°, 663°, and 709°, being entirely liquid at about 885° centlgrade, as shown in Fig. 2. I have successfully used alloys described here inabove for welding and brazing ferrous and 20 non-ferrous parts by both they electric arc and the gas llame methods, for joining brass, bronze, and copper tubes and sheets, and for the repair and ñliing of cast objects, both copper base and iron base. However, due to the unique properties of these alloys they are adapted to many uses, and it is not my intention to limit their applica tion to any particular form or to any particular power, and strong adhesion to other metals. Patents 1,652,107 to Eschhoiz and 1,651,709 to Jones. I am also aware that ternary alloys of copper, phosphorus, and tin have been developed in the past, and such alloys, which are generally of the type known as phosphor-bronzes, have l0 many uses. 'I‘hey have been used for welding, but do not produce-the results obtained with alloys of my preferred composition because of their generally higher tin content and lower phos phorus content. Similarly, my alloys are dis 15 tinguished from those disclosed in U. S. Patent '1,988,422 to Miller by their characteristically low er tin contents, which produce materially dif ferent results as shown hereinabove. When welding with alloys of my preferred oom 20 position, some of the phosphorus is driven out and serves ss an efficient deoxidizer, but enough remains to make the weld strong. The tin in the amounts specified overcomes the brittleness which would otherwise result from the presence 25 of phosphorus, and makes it possible to peen or , machine the weld, and the presence of tin in com The alloys 4 constitutingl my present inventio bination with the phosphorus makes tinning of the welded joint readily possible. may be prepared by processes analogous to those known to «fthe ‘art for the manufacture of other alloys. For example, I may melt phosphor-copper or a mixture of phosphor-copper 'and copper hav ing the desired phosphorus content with the cor My new alloys may be employed in welding or brasing copper, iron. and the like without the use of a flux. but when brazlng brass or other metals or alloys containing appreciable amounts of zinc I prefer to use aiiux of borax or the like, in the rect amount of tin, or I may melt the tin and cop» manner known to theprior art. I claim as my invention: . purpose., ` » per together and then add the phosphorus. The resulting alloy in either case is then cast, drawn. rolled, or otherwise fabricated, into welding rods, electrodes, or other desired forms. Itis generally more convenient to employ the alloy in such forms, but in any case a remarkably strong. dense. ductile weld is formed by the use of my al ' An alloy containing from 2 per cent to 8.3 per 'cent phosphorus and 1min 0.25 per cent to 0.75 per cent tin, the balance being substantially all ALPINE ROSS MACGREGOR.