Nigute Braze Carbide ya Tungsten?

    Ibicuruzwa bya Tungsten Carbide bikoreshwa mubikorwa byinshi, birimo ibikoresho byo gukata, gucukura, gukubita, nibindi byinshi bisabwa. Carbide ya sima itanga imbaraga zo kwihanganira kwambara kandi ikagura ubuzima bwibi bikoresho bitandukanye byo kwambara no gukata. Impamvu nyamukuru yacyo ni tungsten, ni umutungo udasanzwe kandi udashobora kuvugururwa, igiciro cya karbide ya sima ni kinini. Byongeye kandi, karbide ya sima ifite ubukana buringaniye, kandi imbaraga zayo zunama ziri hasi cyane ugereranije nibindi byuma, nkibyuma. Kubera izo mpamvu zombi, karbide ya sima igomba guhuzwa nibindi byuma muburyo butandukanye, nko kubihuza imigozi, gufunga, no gusudira. Iyi ngingo ivuga uburyo bwo gutwika karbide ya tungsten ku bindi byuma.

1. Carbide ya tungsten ni iki?

    Tungsten carbide (WC), nanone yitwa karbide ya sima, ni ibintu byinshi byakozwe muburyo bwitwa powder metallurgie. Ifu ya WC ivangwa nicyuma gihuza, ubusanzwe cobalt cyangwa nikel, bigashyirwa mubikoresho byabigenewe, hanyuma bigacumura mu itanura. Ijambo "sima" ryerekeza kuri tungsten karbide zifatirwa mubintu byuma byuma kandi "bigasigara" hamwe, bigakora isano ya metallurgjiya hagati ya tungsten karbide na binder (WC-Co), mugihe cyo gucumura. Uruganda rwa sima rwa sima rusanzwe ruvuga ibi bikoresho nka "karbide" gusa, nubwo amagambo tungsten karbide na karbide ya sima akoreshwa muburyo bumwe.  Carbide yerekana imbaraga zo gukomeretsa cyane, irwanya gutandukana, kandi ikagumana agaciro kayo mubushyuhe bwinshi, umutungo wumubiri ufite akamaro cyane mugukata ibyuma. 

2. Ingingo ebyiri kugirango tumenye intsinzi mugukata karbide ya tungsten

A.Gucunga imihangayiko iterwa no kwaguka gutandukanye

B.Ibipimo byo kugabanya ibikoresho byababyeyi no guhanagura karbide hamwe na braze

    Mugihe cyo gushyushya no gukonjesha, icyuma cyibanze cyababyeyi kizaguka kandi kigabanuke ku kigero kiri hejuru ya karbide.  Carbide ya Tungsten ifite igipimo cyo kwagura ubushyuhe bwa 1/3 kugeza 1/2 cy'icyuma.  Iyo inteko isunitswe ikonje, imihangayiko isigaye irashobora kubaka muri karbide.  Buhoro buhoro gukonjesha karbide birasabwa buri gihe kwirinda guhangayika no guturika. Kuzimya ntibisabwa kuko bishobora gutera ibice muri karbide kubera kugabanuka byihuse kwicyuma fatizo cyababyeyi.

3. Nigute wahitamo amavuta ya braze

    Tungsten karbide iragoye. Ifeza ya feza ivanze hamwe na Nickel (Ni) isanzwe ikoreshwa mugukata karbide mubyuma. Birumvikana ko karbide nicyuma bigomba kuba bifite isuku kugirango ibishishwa bishongeshejwe bishongeshe neza bishobora guhanagura neza. Gusya hejuru ya karbide kugirango habeho isuku yo gushakisha birakenewe. Gusya kandi bifite ibyiza byo gusibanganya hejuru yubutaka bwa karbide, ishobora gufasha hamwe na braze alloy wetting hamwe na adhesion. Ibigize ibyuma, kimwe, byakenera gusukurwa kugirango bikureho amavuta asigaye, amavuta, umwanda, cyangwa ibindi byanduza hejuru.  

    · Ubucuruzi buboneka bwa silver braze alloys hamwe hiyongereyeho nikel (Ni) na Manganese (Mn) bizahita bitose hejuru ya karbide ya sima. Amavuta ya braze mubisanzwe yerekana neza neza karbide ya tungsten.  Birasabwa guhitamo icyuma cyuzuza hamwe nubushyuhe buke bushoboka bwo kugabanya ubushyuhe kugirango ugabanye imihangayiko isigaye mubice.  

Kuri porogaramucations zirimo gusya karbide nini, sandwich braze alloy ikoreshwa.  Niba karbide ntoya (1/2 inch2) idashobora gukoreshwa, umusemburo wa sandwich ufite akamaro mukurinda kumeneka hamwe nintambara ya karbide. Izi nyabutatu zambitswe umuringa wuzuza impande zombi z'umuringa.  

    · Nubwo ibyinshi mubiganiro byagiye bivugwaho gushakisha karbide ya tungsten (WC), twaba tumerewe nabi tutavuze diyama ya polycrystalline cyangwa PCD. Ubushyuhe bukabije bwa PCD bugumishwa munsi ya 1382 ° F (750 ° C) kugirango birinde kwangirika kwa diyama.  Akenshi, abakora inama za PCD kumubiri wibyuma bazakoresha ubushyuhe buke, feza yuzuye ya feza yuzuza ibyuma, nka BAg-24 ya braze.  Bamwe mu bakora uruganda bakoresha amavuta ya braze adafite nikel cyangwa manganese, nka BAg-5 cyangwa BAg-7 ya braze, hamwe n'ubushyuhe buke bwo gushonga hamwe nubushuhe buke bwa karbide nicyuma.

    Amazi ya brazing akoreshwa mukurinda okiside yimiterere igomba guhuzwa mugihe cyo gushyushya inteko.  Ifu ya Flux ikoreshwa hamwe na feza isanzwe ya braze.  Ifu ya black flux isanzwe isabwa nabakora braze na flux kuko ifite inyongera ya boron kandi ikora neza mubushyuhe bwinshi.

    Hariho ibishishwa byinshi bikoreshwa kuri karbide. Ibisanzwe ni BAG-3, 50% ifeza hamwe na Cadmium.  Iki nigicuruzwa cyiza, ariko gifite Cadmium. Bikunze gukoreshwa ni BAG-7, 56% ifeza hamwe na Tin, kuko ihumeka byoroshye; icyakora, ni intege nke cyane yo gusya, kandi kunanirwa gufatanije nibisanzwe. Imbaraga zikomeye zitari Cadmium ni BAG-22, 49% ifeza hamwe na manganese, ariko ni gummy nkeya mugutemba. BAG-24, 50% Ifeza, ni kadmium kandi ni ubwumvikane.  Itemba neza ariko ifite intege nke nka 40% kurusha BAG-3 na BAG-22.

    Duhitamo cyane Black Flux, nubwo benshi bashushanya neza hamwe na White Flux. Muri ibyo bihe byombi, biragaragara ko ubushyuhe buri hejuru. Muri additio, n dusanga ko Flux isukuye itanga urujya n'uruza rwiza kuruta Flux isanzwe.  

    Agace kanyuma aho amakosa akunze kugaragara mubishushanyo mbonera. Abasudira bahuguwe mubisanzwe bifuza guteranya ibice hanyuma bagakora isaro. Iyo zishashe, zishaka guteranya ibice hanyuma zigashiramo umusemburo wa brazing mu ngingo.   

    Iyo usya karbide, akenshi nibyiza cyane guhinduranya impande no hepfo yikibanza, hanyuma ugashyira ibice byinsinga zivanze munsi ya karbide.  Ibyo ukora byose noneho ni ubushyuhe kugeza karbide ituye mumwanya.   

    Igipimo gikwiye kuba uko karbide yaturika cyangwa ibyuma byacitse mbere yuko urugingo runanirwa.