US987167A - Rolled manganese-steel railroad-rail. - Google Patents

Description

UNiTED STATES PATEFW nw mn.

WINFIELD POTTER, OF MAHWAH NEN JERSEY. iSSIGNOR T BAIL CGMPANY, OE IVIAH'WAH,-NEW J No Drawing.

MANGANESE STEEL SEY.- A GORPDRATIOBI OE JERSEY.

I Application filed Seytember 36, 2908. Serial No. 55,230.

1b all w/aom may cncerm.

Be it known that I, Nmi'mw E5. Po'nrmz,

a citizen ml the united-Siziies, residing at Mahwah, in tlienonnty of Bei'gen and State ganesn steel,

from east m t:

a rail si'liicli shall be free from t 'liaracierisiics My impzn'r-wed rail is preferably mad: from manganese steel of (minniry cinngiositionand numbered ms "in: ivelv 938.891, 938892 saws-i, 938.893, 939,!63 22ml gamma-1; i have referred to Hie weatnwni 0f nmngn'nissu stool im- .ilm pzn'pose'ufannealing, toughening,

- and Wm'king film mm, lll'Hl l'O met-Ennis and,

XEXUCG-TSGS nip-winging finished shapes themfrnin man anese sieel fur use in steam and Heretoforn r2113. have been cast from 21m :1

8 cast mils iii: u} v ilsle in medefectz; msbpmnblc i and because the execs mist nf-in 1,:IO(i1lli021. Vmimis zittez'n-pis lzave alrc been made in mi mils (2f manganese W386i, Znii tine rails :50 pl'mimtfll. have 1192 loeen nfisi zmdnrd size and Section and have nob been free fi'mn imperfections and defects anal Um character of the mei'nl inthe rails has nnlybeen uniform through nun,

It is the nlajeci; of my 'nvenlim'i in but because iiw'v emit mils which shall iossess ii sable (nniln'ws 01; win-lied u and which Si aisi he nf'nmfi'i-ini i131 hire iliroi monk (if cast m manggmwse steel.

containing iron, rrmnganese, carbcm, Sllicflfi and msmaii percentage of izhe srdinn '3' impurities, such phnsplmqus, snlfn'r and 211" senic, 01, if 'lesired, tlig sine] may contain commercial align s such s'teu, titanium, w liiiililfll, nickel 0: 2pm.;

and is roiled from an ingot of standard size, pram-ably f om 211 1 ingot of :gbout six feet in lengili and having sectum EIlniGl' than iwvlve inches square. imicli will produce two 01" more rails o-f-stziiulni'rl lenf i'li and of si'nnzlnnl secliun flint wilbbe firmed niirel r 01F ilnmnigliiy worlaezlnml, wrought main 3. lll'klL IiOVCi'l mil pnselnies :1 swing unbroken outer nuance n1 Sliili and an ex:

irenn-ly fins uniform si ialline structnm which continuous throughout the rail and it free from segrifgntions and Other inequalities of-cnmpositinn. It is also free from defects, found in cast nmnganese steel mils nrising'frnm shrinkage, slag, gas and sand. 01'. from (lui'cut; found in im perfectly limited and wnrkecl .si'eul arising from cracks; sing blow licles 01' pig-es. The rail also pnsw sea gi'mii' claistii-iiyi -t0ugli- 2105s {0min strvngl l1 and shock i'vsistzznve.

is an example of one motlnul whereby E233 impwvgil mil maybe prmlucvd the ingot 01 blofim nf manganese stvel first heated i0, 01* lmbnglit from the molds at, a inniperziiurenlmve ilie point Where the metal begins in We'nken and which point I term i'lw upper cynical mint for vxnmple, from 2910 C. in 1043-1) (X and iwlmv the freezing pnini' (if the nwlal prvi'ui-ably beat 12330 law ilXC point :11 :ilmnl 1''" where the meinl becomes vex-y i": fjllt and brittle. Preferably illL mgni Oi Mmzn an a temjm'nijm'e i i-(m; HOG in i230 (1. dependingnn The ulini'ncivi' n1 111311).lSih'Hfillfi nwtal, {lair size of the ingot and ilm shape and seclinn of the rail in lw i'ulleil, :iml azt a tom-- purntnre where the intci'im' of ilk ingot 0r lill'lfilll in a uniform. p nsiiv slain and the igni n3 2*. whole :-1n lisinntinlly in :1 stalk of iil 'snlnlimi. The skin or v ing'at or bloom, in case isniimw iii? hymgyeminrc of ili iniel'inr, films) gi:1; "-="2i iy reduced in fem eruinia m; mlwlsw 2:3 of the i lOIlOI' am the ingo? lqlunm is ilwn s: ll

. i this mils. anion Elli and without n ier-ind in the action lg (no first passvs s are 45. :uhsianlinl i-mlnniiun of l'il? ingot mbloom in (min? in WC Tk i'ln} miter surl'nm of (he lil-eem 51ml reduce ilk? same to the condition m wrought metal, but aiiar ilzr; initial asses the in vt 01- 'nlpfiin is iwlmrafi i'sipi'i ly 01' slowly as iiesirii in its finished slmgae. Immedintaly inereniiei, and while the; metal ately after rollin and without reheating,

the full efiect. or t e compression and workisstill hot from the heat of rnlling and without reheating, the rail or finished shape is ,quenched, preferably in water.

The lowering of the temperature of the .outer surface or skin while the interior is at a temperature above the upper critical point,

and the initial passes through the rolls both tend to compress the metal of theiingot or bloom and provide the finished shapewith a strong, tough and unbroken outer surface or skin.. i

The subsequent rolling of the ingot ,or bloom to its finished shape reduces the metal to a thorou hly worked or wrought-condition throug out; By quenching immediiriig andconsequent density is retained'in a di tion to the-results" obtained b quenching-so' that: the rail 'or finisheds ape possesses a stron erxouter surface or skin and a finer crystal iz'ation than that obtained in the castrail or that obtained in a? rolled rail which is reheated prior to quenchin If the possessin rail is reheated prior to quenching t e outer surfaceor skinmayvbegoxidized or cracked and thereby weakenedfsot-hat'it willhave less abrasive resistance and'the rail is mpre liable t6 be. broken byhock or stress than if quenched directlyf'from'the heat of roll ing. Furthermore, thecrystalline structure 1 ,as' described.

2. A rolled manganese steelrailroad rail possessing the density, highxelasticplimit' and fine crystalline structure j'characteristic 'of thoroughl .worked metal and the toughness and hat ness characteristic of quenched manganese steel; 1

-3; A'rolled manganese steel railroad rail consisting of thoroughly worked metal throughout and having a strong,t'ough unbroken outer skin. 7

4. A rolled manganese steel railroad rail consisting of thoroughly worked metal and having a continuous fine crystallization throughout.

the structural characteristics ofthe mate as it leaves the rolls, substantially peratu-re above its upper critical rdition, said rail consisting of thoroughly 5. A rolled manganese steel railroad rail consisting of thoroughly worked metal having a continuous fine crystallization throughout and having a strong unbroken outer skin.

' 6. A rolled manganese steel railroad rail of standard length and section consisting of thoroughly worked metal and possessing a contmuous fill 01111 fine crystallization throughout.

7. A rolled manganese steel railroad rail of standard length and section, quenched in water fronrthe heat of rolling.

8. A railroad trail rolled from an ingot .or

bloom of manganese steel while its interior is heated to a temperature above the upper critical point, said rail havin a continuous uniform fine crystallization roughout.

9. A railroad'rail rolled from a mangr 'nese steel ingot or bloom of standard size heated to a temperature above. its u per, critical point, said real being of stan ard size and section and consisting of thoroughly.

'worked and 'wrou ht, metal, having a con tinuous fine crysta liz'ation throughout. I1,

10. A railroad'rail rolled from a ma 7 nesesteelgingot or bloom of standard size heated to a tern 'rature "above its upper critical point an quenched from the eat of rolling without reheating, 'saidirail being of standard length and section and consisting of thoroughly worked metal of a continuous uniformly fine crystallization and having a strong unbroken outer skin.

-11. A railroad rail rolled from an ingot orbloorn of manganese steel while at? a tempera-ture above its upper critical point and having its interior in a soft and plastic condition, said rail consisti .of thoroughly worked and wrought meta throughout. a

12. A railroad rail rolled from an ingot or bloom of manganese steel heated toa'teme aving its interior in a soft and p astic con;-

Worked and wrought metal throng out quenched from the heat of rolling without reheating.

point and This specification signed andwitn'essed, this 25th day of S'eptember'A. D., 1908.

WINFI'EL D S. POTTER. Signed-in thepresence of- Gamr VAN Guava,

OAKLnY W. .Cooim.