US2104694A - Weldrod - Google Patents

Description

Patented M4, was v umrao s'rAr as] enT'ENT OFFICE I WELQROD 4 Anthony G. de Golyer, New York, N. Y., assignor to Vulcan Alloy Delaware I No Drawing.

This invention-relates to a hew alloy steel and relates particularly to'an alloy steel containing -manganese and boron, as well as certainother elements in the form of a weld rod for the'production of welded surfaces or sections characterized by a relatively high degree of hardness, resistance to, abrasion and resistance to deformstion under impact. c This application is a. continuatlonin part of my -co-pendin'g application Serial No. 96,463, filed August 17,1936. I

'In many industrial applications it is desirable vfo apply'a facing orinlay of hard, wear-resistant metal to parts of machinery or other equipment exposed to abrasion'or impact. Various alloys and materials have been proposed for this pur-. pose. 'All'of such heretofore suggested compositions contain high percentages of alloy elements,

' together with at least approximately 1% or more carbon; In general, weld metal deposited with Corporation, a corporation of Application March 12, 1937,

Serial No. 130,494 w 1 Claim. (c1. 21am) bination of physical properties and characteristics possessed by this alloy render it particularly valuable for facing new or worn rail ends,

new or worn railroad track equipment, such as frogs, crossovers, switch points, etc, for firepair- 'ing orrefacing manganese steel and other alloy steels and for facing wearing surfaces ofcarbon such compositions may have relatively high hard-' nss but all of such depositsare comparatively brittle and consequently are not suitable for. use on surfaces exposed to impact or shock.

' The object of the present invention is to provide an alloy which may bereadily depbsited by fusion welding, and which produces weld metal ahaving relatively high strength, high resistance is as 'to deformation under impactand-relatively high hardness. I

I have found that an alloy composed of man- 0.50% to'-5%, carbon 0.10% to 0.60% and thebals'mce-principally iron possesses highhardness,

formationunder impact when deposited by means of welding. Metalgso'deposited has a ahardness of from .350 to approximately. 500

' 'Brlnell depending, .in part, on the composition a 0 of the base metal and* the ratio of dilution? 'Weld deposits-of the alloy which have been subjected to an appreciable amount of cold work or impact usually show an increase in hardness of from to Brlnel1 numbers. f

. A distinct advantage of the present alloy' is that it may be readily welded on steel of any 'ganese 1% to 6%, boron 0.25% to 2.50%, nickel high strength and'is extremely resistant to de-" .st tially iron. It will be understood that the" v should steels. Weld deposits'of this alloy are characterized by an appreciably greater hardness than weld deposits of heretofore known manganese steel,

and are further characterized by materially, greater resistance. to deformation under impact ll .The\' 5% and the carbon content should notexceed approximately 0.60%; the balance being sub- V a 037 will usually contain minor amounts 'of phos-'- phorous, sulphur and other impurities incidental to manufacture; the amounts of. such impurities prescribed for alloy steels.

As specific examples of alloys within the scope of the present invention," which I have found to be suitable for facing by welding of new or worn equipment, are the following: Manganese 1.80%, boron 0.35%, nickel 1.50%, carbon 0.20% and the balance substantially iron; manganese 4.60%,

boron 1.10%, nickel 2.50%, carbon 0.40% and the balance substantially iron; manganese 5.50

be within the maximum lir nits ordinarily boron 1.30%, nickel 3%,;carbon 0.25% and t e balance substantially iron.

It will be understood that minoramounts of r I silicon will usually be present in the alloy inci- 'should not exceed approximately dental to manufacture. "The silicon content 1%. Iclaim: i I A weld-rod comprising a metallic composition containing manganese 1% to6%, boron0.25% to -2.50%, nickel 0.50% to 5%, carbon up to, a maxi-v carbonTcontent, 14% manganese steel, rail'steel. and virtually (all types of alloy steels, The .com-

main of 0.60% and the balance substantially iron.

ANTHONY a. n: GOLYERJ