.Ugereranije nicyuma, uyigurisha biragoye guhanagura grafite na diamant polycrystalline, kandi coefficient yayo yo kwagura ubushyuhe iratandukanye cyane nibikoresho rusange byubatswe.Byombi bishyushya mu kirere, kandi okiside cyangwa karubone bizabaho igihe ubushyuhe burenze 400 ℃.Kubwibyo, gushakisha icyuho bizakoreshwa, kandi impamyabumenyi ya vacuum ntishobora kuba munsi ya 10-1pa.Kuberako imbaraga zombi zidafite hejuru, niba hari ubushyuhe bwumuriro mugihe cyo gushakisha, hashobora kubaho ibice.Gerageza guhitamo icyuma cyuzuza ibyuma hamwe na coefficient nkeya yo kwagura ubushyuhe kandi ugenzure neza igipimo cyo gukonja.Kubera ko ubuso bwibikoresho nkibi bitari byoroshye guhanagurwa nicyuma gisanzwe cyuzuza ibyuma, igice cya 2,5 ~ 12.5um cyubugari bwa W, Mo nibindi bintu birashobora kubikwa hejuru yububiko bwa grafite na diamant polycrystalline muguhindura hejuru (vacuum coating) , ion gusuka, gutera plasma nubundi buryo) mbere yo gushakisha no gukora karbide ihuye nayo, cyangwa ibikorwa byinshi byo gushakisha ibyuma byuzuza bishobora gukoreshwa.
Graphite na diyama bifite amanota menshi, atandukanye mubunini buke, ubucucike, ubuziranenge nibindi, kandi bifite ibimenyetso bitandukanye byo gushakisha.Byongeye kandi, niba ubushyuhe bwibikoresho bya diyama polycrystalline burenze 1000 ℃, igipimo cyo kwambara polycrystalline gitangira kugabanuka, naho igipimo cyo kwambara kigabanuka hejuru ya 50% mugihe ubushyuhe burenze 1200 ℃.Kubwibyo, mugihe vacuum yaka diyama, ubushyuhe bwo gutwika bugomba kugenzurwa munsi ya 1200 and, kandi impamyabumenyi ya vacuum ntishobora kuba munsi ya 5 × 10-2Pa.
(2) Guhitamo ibyuma byuzuza ibyuma bishingiye ahanini kumikoreshereze no gutunganya hejuru.Iyo ikoreshejwe nk'ibikoresho bitarwanya ubushyuhe, hazatoranywa icyuma cyuzuza ubushyuhe hamwe n'ubushyuhe bukabije hamwe n'ubushyuhe bwiza;Kubikoresho bya chimique birwanya ruswa, hatoranijwe ibyuma byuzuza ubushyuhe buke hamwe no kurwanya ruswa.Kuri grafite nyuma yo kuvura ibyuma byo hejuru, kugurisha umuringa usukuye ufite ihindagurika ryinshi kandi birwanya ruswa irashobora gukoreshwa.Ifeza ishingiye ku muringa hamwe n’umuringa ukora igurisha bifite amazi meza kandi meza kuri grafite na diyama, ariko ubushyuhe bwa serivisi bwibice bifatanye biragoye kurenga 400 ℃.Kubice bya grafite nibikoresho bya diyama bikoreshwa hagati ya 400 ℃ na 800 ℃, shingiro rya zahabu, palladium base, manganese base cyangwa titanium base yuzuza ibyuma.Ku ngingo zikoreshwa hagati ya 800 ℃ na 1000 ℃, hazakoreshwa nikel ishingiye cyangwa drill ishingiye ku kuzuza.Iyo ibice bya grafite bikoreshejwe hejuru ya 1000 ℃, ibyuma byuzuye byuzuza ibyuma (Ni, PD, Ti) cyangwa ibyuma byuzuza amavuta birimo molybdenum, Mo, Ta nibindi bintu bishobora gukora karbide hamwe na karubone birashobora gukoreshwa.
Kuri grafite cyangwa diyama itavuwe hejuru, ibyuma byuzuza byuzuye mumeza 16 birashobora gukoreshwa muburyo butaziguye.Ibyinshi muri ibyo byuma byuzuza ni titanium ishingiye kuri binary cyangwa ternary alloys.Titanium yera ikora cyane hamwe na grafite, ishobora gukora karbide yuzuye cyane, kandi coefficente yayo yo kwagura umurongo itandukanye cyane na grafite, byoroshye kubyara ibice, kuburyo idashobora gukoreshwa nkugurisha.Kwiyongera kwa Cr na Ni kuri Ti birashobora kugabanya aho gushonga no kuzamura ubushuhe hamwe nubutaka.Ti ni ternary alloy, igizwe ahanini na Ti Zr, hiyongereyeho TA, Nb nibindi bintu.Ifite coefficient nkeya yo kwagura umurongo, ishobora kugabanya guhangayika.Umuti wa ternary ugizwe ahanini na Ti Cu ukwiranye no gushushanya grafite nicyuma, kandi ingingo ifite imbaraga zo kurwanya ruswa.
Imbonerahamwe 16 yuzuza ibyuma byuzuza grafite na diyama
.Nuburyo ki bwakoreshwa, gusudira bigomba kubanzirizwa mbere yo guterana, kandi hejuru yanduye yibikoresho bya grafite bizahanagurwa neza hamwe n'inzoga cyangwa acetone.Mugihe habaye ubutumburuke bwubutaka, igice cya Ni, Cu cyangwa igipande cya Ti, Zr cyangwa molybdenum disilicide kigomba gushyirwaho hejuru ya grafite hifashishijwe gutera spray, hanyuma hagakoreshwa ibyuma byuzuza umuringa cyangwa icyuma gikozwe mu ifeza. .Gukata neza hamwe nugurisha ukora nuburyo bukoreshwa cyane kurubu.Ubushyuhe bwo gukonjesha burashobora gutoranywa ukurikije uwagurishijwe yatanzwe kumeza ya 16. Umugurisha arashobora gufatirwa hagati yumutwe wangiritse cyangwa hafi yumutwe umwe.Iyo usya hamwe nicyuma gifite coefficient nini yo kwagura ubushyuhe, Mo cyangwa Ti hamwe nubunini runaka birashobora gukoreshwa nkurwego rwagati rwagati.Inzibacyuho irashobora kubyara plastike mugihe cyo gushyushya umuriro, gukuramo ubushyuhe bwumuriro no kwirinda gucika grafite.Kurugero, Mo ikoreshwa nkinzibacyuho ihuriweho na vacuum brazing ya grafite na hastelloyn.B-pd60ni35cr5 ugurisha hamwe no kurwanya neza umunyu ushonga hamwe nimirase.Ubushyuhe bukabije ni 1260 ℃ kandi ubushyuhe bugumishwa 10min.
Diyama isanzwe irashobora gutondekwa neza na b-ag68.8cu16.7ti4.5, b-ag66cu26ti8 nabandi bagurisha bakora.Brazing igomba gukorwa munsi ya vacuum cyangwa kurinda argon.Ubushyuhe bwo gutwika ntibugomba kurenga 850 and, kandi hagomba gutoranywa igipimo cyihuta cyo gushyuha.Igihe cyo gufata ubushyuhe bukabije ntigomba kuba kirekire (muri rusange nka 10s) kugirango wirinde gushiraho tic layer ikomeza kuri interineti.Mugihe usya diyama nicyuma kivanze, plastike interlayer cyangwa kwaguka kwinshi kwagateganyo bigomba kongerwamo inzibacyuho kugirango hirindwe kwangirika kwintete za diyama ziterwa nubushyuhe bukabije bwumuriro.Igikoresho cyo guhinduranya cyangwa igikoresho kirambiranye cyo gutunganya ultra precision yakozwe muburyo bwo gusya, butwika 20 ~ 100mg ntoya ya diyama ntoya kumubiri wibyuma, kandi imbaraga zifatanije zifatizo zigera kuri 200 ~ 250mpa
Diyama ya polycrystalline irashobora gutwikwa numuriro, inshuro nyinshi cyangwa vacuum.Gukoresha inshuro nyinshi cyangwa gucana umuriro bigomba gukoreshwa kuri diyama izengurutswe ikata icyuma cyangwa ibuye.Ag Cu Ti ikora brazing yuzuza ibyuma hamwe no gushonga hasi bizatoranywa.Ubushyuhe bwo gutwika bugomba kugenzurwa munsi ya 850 ℃, igihe cyo gushyuha ntigishobora kuba kirekire, kandi hagomba gukurikizwa umuvuduko ukonje.Diyama ya polycrystalline ikoreshwa muri peteroli no gucukura geologiya ifite akazi keza kandi ifite imitwaro myinshi.Nickel ishingiye kuri brazing yuzuza ibyuma birashobora gutoranywa kandi fayili yumuringa irashobora gukoreshwa nkumuhuza wa vacuum brazing.Kurugero, capsules 350 ~ 400 Ф 4.5 ~ 4.5mm inkingi ya polycrystalline ya diyama isunikwa mumyanya ya 35CrMo cyangwa 40CrNiMo ibyuma kugirango ikore amenyo.Vacuum brazing iremewe, kandi impamyabumenyi ya vacuum ntabwo iri munsi ya 5 × 10-2Pa, ubushyuhe bwo gutwika ni 1020 ± 5 ℃, igihe cyo gufata ni 20 ± 2min, kandi imbaraga zo gukata zifatanije zirenga 200mpa
Mugihe cyo gushakisha, uburemere bwikigero cyo gusudira bugomba gukoreshwa muguteranya no guhagarara uko bishoboka kwose kugirango igice cyicyuma kanda kuri grafite cyangwa polycrystalline mugice cyo hejuru.Iyo ukoresheje igikoresho kugirango uhagarare, ibikoresho bigomba kuba ibikoresho hamwe na coefficient yo kwagura ubushyuhe busa nubwa weldment.
Igihe cyo kohereza: Jun-13-2022