Terminology of Hard Alloy(2)

Decarbonization

Pambuyo poyatsa simenti ya carbide, mpweya wa carbon ndi wosakwanira.

Zinthu zikawonongeka, minofu imasintha kuchoka ku WC-Co kupita ku W2CCo2 kapena W3CCo3. Mpweya wabwino wa tungsten carbide mu cemented carbide (WC) ndi 6.13% polemera. Mpweya wa carbon ukakhala wochepa kwambiri, padzakhala kutchulidwa kuti alibe mpweya wa carbon mu mankhwala. Decarburization imachepetsa kwambiri mphamvu ya tungsten carbide simenti ndikupangitsa kuti ikhale yolimba kwambiri.

Carburization

Zimatanthawuza kuchuluka kwa kaboni wowonjezera pambuyo poyatsa simenti ya carbide. Mpweya wabwino wa tungsten carbide mu cemented carbide (WC) ndi 6.13% polemera. Mpweya wa kaboni ukakhala wochuluka kwambiri, mawonekedwe odziwika bwino a carburized amawonekera muzinthuzo. Padzakhala kuchulukirachulukira kwa kaboni waulere pazogulitsa. Mpweya waulere umachepetsa kwambiri mphamvu ndi kuvala kukana kwa tungsten carbide. C-mtundu pores mu gawo-kudziwika zimasonyeza mlingo wa carburization.

Kukakamiza

Mphamvu yokakamiza ndi mphamvu yotsalira ya maginito yomwe imayesedwa ndi magnetizing zinthu za maginito mu carbide yomangidwa ndi simenti kuti ikhale yodzaza ndiyeno kuchotsa maginito. Pali mgwirizano pakati pa pafupifupi tinthu kukula kwa simenti carbide gawo ndi coercivity. The bwino pafupifupi tinthu kukula kwa magnetized gawo, ndi apamwamba ndi coercivity mtengo.

Maginito machulukitsidwe

Cobalt (Co) ndi maginito, pamene tungsten carbide (WC), titanium carbide (TiC), ndi tantalum carbide (TaC) si maginito. Chifukwa chake, poyesa koyamba kuchuluka kwa maginito a cobalt muzinthu ndikufananiza ndi mtengo wofananira wa chitsanzo choyera cha cobalt, popeza machulukitsidwe a maginito amakhudzidwa ndi zinthu zomwe zimapangidwira, mulingo wa alloying wa gawo lomangidwa ndi cobalt ukhoza kupezeka. . Kusintha kulikonse mu gawo la binder kumatha kuyeza. Popeza mpweya umagwira ntchito yofunikira pakuwongolera kapangidwe kake, njira iyi itha kugwiritsidwa ntchito pozindikira zopatuka kuchokera ku zomwe zili ndi mpweya wabwino. Kutsika kwamphamvu kwa maginito kumawonetsa kutsika kwa mpweya komanso kuthekera kwa decarburization. Makhalidwe apamwamba a maginito amawonetsa kukhalapo kwa carbon yaulere ndi carburization.

Madzi a Cobalt

Pambuyo poyimitsa zitsulo zachitsulo (Co) binder ndi tungsten carbide, cobalt yowonjezera ikhoza kupangidwa, chomwe ndi chodabwitsa chotchedwa "cobalt pooling". Izi makamaka chifukwa panthawi ya HIP (Pressure Sintering), kutentha kwa sintering kumakhala kochepa kwambiri ndipo zinthu zimapanga kusamvana kosakwanira, kapena pores amadzazidwa ndi cobalt. Dziwani kukula kwa dziwe la cobalt poyerekeza zithunzi za metallographic. Kukhalapo kwa dziwe la cobalt mu carbide yopangidwa ndi simenti kumakhudza kukana kuvala ndi mphamvu ya zinthuzo.

Ngati muli ndi chidwi ndi zinthu za tungsten carbide ndipo mukufuna zambiri ndi zambiri, mutha KULUMIKIZANA NAFE pa lamya kapena makalata kumanzere, kapena KUTITUMIZIRA MAIL pansi pa tsambali.