US2160290A - Wear resisting alloy - Google Patents

Description

, is thus easily cast into the form of tubes or noz- Patented May 30, 1939 7 2,160,290

WEAR RESISTING ALLOY Robert W. Schlumpf, Houston, Tex, assignor to Hughes Tool Company, Houston, Tex., a corporation of Delaware No Drawing. Application January 31, 1938, Serial No, 187,895

3 Claims. (Cl. 75-126) This invention relates to wear resisting com- Heretofore, .a .hardquality of steel has been pounds of hard metals. extensively employed for wear resisting purposes It is an object of the invention to provide an in nozzles of this character, but I find that when alloy which is adapted to withstand abrasion and nozzles are made of my new alloy, such tools will 5 wear. I last from three to four times as long as with the 5 I desire to provide a steel having alloyed thereold composition. with metals combined in such proportion as to My invention is particularly valuable in the make the resultant alloy capable of withstanding making of nozzles to conduct the flow of mud wear due to contact therewith'of abrasive matethrough a well drill in deep well operations. The rials such as sand, shot and the like. drilling mud has quantities of abrasive material The alloy is particularly adapted for use in therein and the mud discharging tubes in the drill casting tubes employed as nozzles in sand blasthead become worn frequently before the cutters ing, and for the discharge therethrough of fluids upon the drill are worn out. This seriously imcontainng abrasive materials. pairs the operation of the drill, as the pressure 5 -I also desire to provide a composition of metals of the drilling fluid is decreased and the operawhich, when molten, is fluid enough for ready tion of the drill thus affected. casting into molds. The proportions of the metals may be varied My mp n consists f. iron h v h within the limits noted without materially afin a tu Chromium, and boron in fecting the character of the resulting alloy.

0 about the following proportions: What I claim Percent 1-. A hard abrasion resisting alloy comprising carbon 1 to 15 a mixture of materials fused together in approx- Tungstpn 14,0 to 131 imately the following proportions: chromium,

Berlin 0,5 t 21 5.0% to 6.0%; boron, 0.5% to 2.0%; carbon, Chromium 5,0 to 9 1.0% to 1.5%; and tungsten, 14.0% to 18.0%; I the balance iron,'said alloy being capable of being In the making of this alloy I find it economical cast only, and incapable of being forged or to use high speed steel scrap. Such scrap is Workei I waste about a machine shop where tools made of A wear resisting composition made up of steel having therein a certain percentage of tungiron havinganoyed therewith chromium, appr0x 1% that if carbon, chromium and boron are added g g izz sj composltlon 708mg Capable of beto make up an alloy approximately as set out 3. An abrasion resisting discharge nozzle made 332:3: a partlcula'fly weargslstapt F 15pm of iron alloyed with about 1% to 1 /2% of car- The boron not only adds materially to the wear hon; 14% to 13% of tungsten; of resisting qualities of the alloy, but is also valuable and to 6% of chromium, Bald HQZZIG in making the same more fluid when molten. It bemg cast into form. I

zles. Y ROBERT W.- SCI-ILUMPF.