Tipped tool

Claim 1

4 A2 r91. The compcsition of material of claim 6 in which 2. the combinded amounts of tungsten and molybdenum monocarbide 3. comprises more than 96 mole percent of the carbides in the K composition of material. 0 The Math-od o-ff makino a comnocsition at- material comprising sin.tored carb ide-bi nder met-l alloys in whlich the carbide cmris qrai.ns of ,onocrbidL ae usatal 4. on a inre ;oleered hon o1idl solution :na (IMo C eim.bedded in a !oiar of heat troea Labo stocl allc- oi ch =contcunz between 6. 0.4'0 and 8. 0 coint bywua c!raim cwo 0.4f) and :r1 or a 'T Loe t a' iw2a 1o -L 1o1 C fro:) the qrou 0 con (DI3I rradtns .lan t'n:rolba I b c 'AdCeab W' 0. 'C 0. CC luv wt.n'lu and1 0.3ad12 30 avcrD Ct VCeUIv -I w i 12. the a( a .13. ra or a aw* L!ua OfLi n r~a 1, anIVUIo* Kiia'-'o tar tho; 4 u ri~otr llv~ wi th up to 17. 10) atv I ;onc rnt adnj aetu .1c~tohris 1. C.2 pcrcnt y weiqn'L \aaa.oania 1.3 rccnt by woiv-oht I. osi :A wiLhany addi4tional chosua 3.ch nd vanadiuci bain dde to tho poo:0or mixture carlbtdes ant: w jthmlbeu arnd 21. tungsten ornp_ nents of the bindor being addod as elemental powders 2.or carbides, 23, wet iriliing the powder mixture to increase the sinteT ig S24. activi>y of the iron powder, 25~ drv ing and homoyeizin: thle powder rixtaro 26. prossincj the nwdo mixture into, compacts having the 27. desirud saeand 29. al-a 0.c- 31 1 o1i o o 1. 13. The method of making a heat treatable composite 21. structure comprising a heat treatable cemer> a, carbide component 3. and a heat treatable steel component in which the cemented 4. carbide component comprises grains of monocarbide based substantially on a preselected hexagonal solid solution (Mo,W)C r-4 6. embedded in a binder of heat treatable steel alloy which contains 7. between 0.40 and 8.0 percent by weight chromium between 0.40 and *a8. 8.0 percent by weight of a metal selected from the group consisting of molybdenum and tungisten less than 1.5 percent by weight vanadium and between 0.15 and 1.20 percent by weight *a11. carbon, with the binder metal being from 30 to 80 percent by :12. volume of the compo:;it ion of miatcrial, and in which the. steel .13. component is forrmecd trom a castable o lo towihmto 14. comprises the s~p;of: propairn;j .a povi r m-,ixt re o1 ~I c-ilbides h~aving 16 the:- dcx.; ired mss eamncs ition 7: cmne car ic compone~nt *17. in wh Lcli tich inier )fothe p~owder mnixture comprises ((rto iron powdtr whose,-. I-vora(edinet less thani 40 micrometers is-- alloyed w"ith1- Up to I-0 petrl hy we <Iit eth!I(r iron qroup olcrnenrt-. and, not mclore than11 0).2 per-cent by we i'J11 t jiidin and 1 .5 pe2rceLnt by 21 La qW chrIolmiuIm,'owithIiii, add L t- ieee I chro:mi hA ee in vaiiadilunl bein-I 2-2. 'Adiei to th od toea r dsco,: i o~~nm and -23. tonif cenpunelit;; ol(Il,the tilt- hi i1 Ce aselemental dei -dd:d pow.,ders 24. c rbe; wet inilii i the powder mix tui to increIas-e the s in tering 26. atxiL'of the ii on powdor, B:- i.: ~qr;~ .id J 2!7 drying and homogenizing the powder mixture, 28, pressing the powder mixture into a compact having a C 29, predetermined shape, sintering the compact to substantially full density at t- 31. sintering temperatures not higher than the temperature at which 32. q-carbides are formed for the preselected solid solution 0 633. (Mo,W)C, 66 4. 34.' pl-ing the sintered compact in a predetermined 0* 4. 35. location of a casting mold, a4 0 36. pouring molten low alloy steel into the mold, and :60440 6 37. allowing the molten steel to solidify, whereby a composite 40.0 38. structure is formed in which the cemunted cirbide component is 39. intejrally bonded to the steel component and the ceomented carbide *0 40. Component- is prestresseu in compression. 0u@ 0 of 00S i v heat treataible comroiJte structur- or method of maki ornme substntiallv nas hIereinbefore described with 4 r'fn renic tc thie accomonrying drawings. 6 0 06 FTj T dOay of thi (tt ec ember, 1977. ;v hi Pntront Attorneys: iji.iN AND ASSOGIlATEK3