Kana vanhu vakanzwa 'cobalt alloy casting parts', mubatanidzwa wepakarepo unowanzo 'kushanda kwepamusoro', 'aerospace', kana kuti 'medical implants'. Izvo hazvina kukanganisa, asi iko kunzwisiswa kwepamusoro-soro kunopenya pamusoro peiyo gritty chaiyo yekunyatsogadzira izvi zvikamu. Dambudziko chairo harisi mupepa realloy chete; iri mukugadzirisa shanduko kubva pagomba resimbi rakanyungudutswa, richienda kuchikamu chakadzikama, chisina hurema chinogona kurarama muturbine kana muviri wemunhu. Vazhinji vanofungidzira kana iwe uchigona kukanda simbi, unogona kukanda cobalt alloys. Kufungidzira ikoko kwakadhura kupfuura zvitoro zvishoma mari yakawanda.
Iyo Alloy Haisi Ingori Formula, Ihwo Maitiro
Kushanda necobalt-chromium alloys, seyakajairwa CoCrMo mamakisi, chidzidzo mukuzvininipisa. Uri kubata nechinhu chine nzvimbo yakanyanyisa kunyungudika uye tsika yakashata yekugadzira maokisi akatsiga. The cobalt alloy casting maitiro, kunyanya kukanda mari yatinoshandisa zvakanyanya, inova tambo yekufamba pakati petembiricha, mold preheat, uye kumhanya kwekudira. Madhigirii mashoma kubva pane mold preheat, uye iwe unowana mistruns. Kunyanya kunonoka pakudira, uye unotonhora kuvhara. Kukurumidza, uye iwe unoteya gasi kana kukanganisa ganda receramic. Harisi resipi raunotevera; ndiwo maitiro aunoedza kutarisira uye kutonga.
Ini ndinorangarira batch yegasi turbine seal segment makore mashoma kumashure. Iyo chemistry yaive yakakwana, iyo wax pateni yemuti yaive isina chikanganiso. Asi takanga tine mukomana mutsva pachoto zuva iroro. Akatevera standard protocol yenickel-based superalloy yatinomhanyawo. Zvakaguma nei? Simbi 'yakagadzirwa' muforoma - yakarasikirwa nekunyorova kwayo nekukasira. Zvikamu zvaitaridzika zvakanaka mukuona, asi X-ray yakaratidza mukati shrinkage porosity muzvikamu zvakakora. Kupisa kwese kwakapera. Ndiro zuva iro timu yakanyatsoisa mukati kuti cobalt alloys usaregerere. Kusimba kwavo kwemhando uye kupisa conductivity mhuka dzakasiyana. Iwe haugone kushandisa jenaric casting mitemo.
Apa ndipo panowanikwa ruzivo rwenguva refu, semakore makumi matatu+ pachitoro seQSY, chinobatika. Hazvisi zvekuva nemashiripiti; ndezvekuva neraibhurari yakadzama, ingangoita intuitive yechikonzero-uye-mhedzisiro yejometri dzakasiyana. Iwe unodzidza kuti chinhu chakatetepa-chakakomberedzwa chevharuvhu chinoda yakasarudzika nzira yekugezera uye yekusimuka ichienzaniswa nehombe yekupfeka ndiro, kunyangwe ichibva kugiredhi rimwe chete realloy. Ruzivo rwuri patani engineering kare simbi isati yanyungudutswa.
Shell Mold Casting: Yakarurama ine Ceramic Ganda
Kune yakaoma, yakakwirira-kutendeseka cobalt alloy zvikamu, shell mold casting - rudzi rwekutsvaga mari - kazhinji ndiyo nzira chete inoshanda. Kupedzwa kwepamusoro uye kwedimensional kurongeka hazvienzaniswi nekukandwa kwejecha. Asi iyo ceramic shell pachayo ndiyo yakakosha shanduko. Cobalt alloys ari reactive. Kana bhainda regoko kana kuti refractory riine tsvina inogona kuderedza kugona kweokisijeni yemuno pakupisa kwakanyanya, unowana chiitiko chinonzi 'metal-mold reaction'. Inogadzira yakaomarara, brittle, kazhinji yakasvibiswa pamusoro pedenga pane yekukanda iyo inotyisa kumisa muchina uye inogona kuvanza makatsemuka.
Takaita mwedzi tichifona mushell system yedu ye cobalt-based work. Musanganiswa wevaridzi, asi pfungwa iri kushandisa yakakwirira-kuchena alumina uye zirconia refractories ine silica-isina binder system. Kuomeswa nekupfurwa kwacho kune hutsinye-zvinyoro zvishoma kusvika kune tembiricha yakakwira zvakanyanya kupisa organic uye kupinza goko mumudziyo wakasimba, usingabatiki. Kumhanyisa kupfura kutenderera kunotungamira kune isina kusimba goko rinogona kutsemuka panguva yekudira kana, zvakatonyanya, kugadzira madiki-akatsemuka anoita kuti simbi ipinde, ichiparadza pamusoro. Ndakaona maparts achibuda achiita kunge ane ndebvu dzeceramic. Ndizvo chete rework, kana zvimedu.
Kudyidzana nekamuri yeganda kwakakosha. PaQSY, kukanda uye machining zviri pasi pedenga rimwe, izvo zvinobatsira. Iwo machinist anozofanira kucheka iyi yakaoma zvinhu vanokurumidza kunyunyuta kana iyo shell yakadzimwa, nekuti hupenyu hwavo hwematurusi hunodonha kana varova reactive surface layer. Iyo yemukati mhinduro loop yakakosha. Inomanikidza rutivi rwevatangiri kuti rwuve muridzi wedambudziko kubva pakutanga kusvika pakupedzisira, kwete chete kutozosvikira chikamu chazunguzwa kubva mujecha.
Iko CNC Machining Inopinda muChat
Kwete cobalt alloy casting chikamu chaicho 'net-shape'. Iwe unogara uchida machining, uye apa ndipo panosangana nerabha nzira. Cobalt alloys anozivikanwa zvakanyanya kuoma muchina. Vanoshanda-vakaomesa nekukurumidza, vanoshungurudza, uye vanochengeta simba pakupisa kwakanyanya. Chikamu chisina kugadzirwa zvakanaka chinogona kuve nekusarira kushushikana kana madiki-makororo izvo zvinokonzeresa kutadza kushanda nguva isati yakwana. Ichi ndicho chikonzero kushanda kwakabatanidzwa kwakakosha zvikuru.
Iyo as-cast chikamu chine chiyero, gedhi system, uye yakawandisa zvinhu (iyo 'stock'). Danho rekutanga rinowanzobvisa magedhi nevhiri rakacheka-chekwa rinoputika-mazhenje achibhururuka kwese kwese. Zvadaro inoenda kune CNC chigayo kana lathe. Kusarudzwa kwemidziyo ndizvo zvese. Iwe unoda akaomesesa maturusi, premium carbide mamakisi, dzimwe nguva kunyange ceramic kana CBN inoisa yekupedzisa. Inotonhorera kudzvanywa uye vhoriyamu hazvigone kutaurirana; unofanira kufashaidza cheka kudzora kupisa uye kusuka machipisi. Chipi chinochekazve ipapo chinoparadza chinoisa.
Takagadzira zvigaro zvecobalt-based alloy zvigaro zvemavharuvhu ebasa rakaoma. Kushivirira panzvimbo yekuvharisa kwaive mumamicrons. Dambudziko raive rekuti kukanda, mushure mekurapwa kwekupisa, kwaive nekukanganisa kushoma, kusingafungidzirwe. Yedu CNC programmers aifanira kuvaka mukuongorora maitiro ekuti 'mepu' yechikamu chaicho geometry mukugadzirisa kusati kwapera kwekupedzisira kupasa. Yakawedzera nguva, asi yaive nzira chete yekuvimbisa chisimbiso. Rudzi urwu rwekugadzirisa machining hausi mubhuku; inozvarwa kubva mukurasa mashoma anodhura castings uye kufunga kuti nei.
Kurapa Kupisa: The Silent Game-Changer
Ichi chinogona kunge chiri icho chinonyanya kufuratirwa. Izvo zvimiro zvecobalt alloy casting zvinogadzirwa muchoto chekupisa, kwete choto chekukanda. Kugadzirisa kurapa, kuchembera-aya matenderedzwa anotsanangura yekupedzisira microstructure, carbide kugovera, uye michina zvivakwa. Ita zvisizvo, uye iwe une chikamu nekemikari yakakodzera inoita sejunk.
Dambudziko nderekuenderana. Chikamu chakakura, chakakora-chikamu uye chidiki, chakatetepa kubva pakupisa kumwe chete hachikwanise kuona chimiro chetembiricha yenguva imwechete. Iyo gobvu chikamu chepakati chinogona kusasvika pakudziya tembiricha, zvichisiya zvisingadiwi. Takadzidza izvi nenzira yakaoma nekumhanya kwemaprototypes ekuvhiya. Kusimba kwesimba uye kuneta hupenyu hwaive husingaenderane chikamu nechikamu. Honzeri yakanga iri kuwirirana kwechoto uye patani yedu yekurodha. Isu taifanira kuisa mari mumafuremu echokwadi ane akawanda-zone control uye yakasimba mitoro yekutonga mitoro. Ikozvino, kune zvakakosha zvikamu, isu tinotoshandisa thermocouples akaiswa muzvikamu zvekupira mukati memutoro kuratidza nhoroondo yekupisa.
Inhanho inodhura, asi ndiyo inoparadzanisa kukanda kwezvinhu kubva kune yakavimbika-yepamusoro chikamu. Iwe haugone kuongorora microstructure muchikamu; iwe unofanirwa kuigadzirisa mukati. Iyi backend inokwanisa ndiyo inoita kuti mutengesi akafanana neQSY avimbike kune zvekurapa uye basa remuchadenga, uko mapepa (chati yekupisa kupisa) yakakosha sechikamu pachayo.
Chiyero Chaiye: Kutadza Kuongorora uye Kudzokorora
Muedzo wechokwadi wehunyanzvi mu cobalt alloy kukanda zvikamu haisi chinyorwa chekutanga chakakwana. Ndiwo mabatiro aunoita vanenge vakundikana. Takanga tine chikamu chepombi yemakemikari yakakundikana mukuneta mushure memazana mashoma maawa. Mutengi wacho, zvinonzwisisika, akagumbuka. Iyo post-mortem yaisanganisira kupatsanura chikamu, kuita SEM/EDS kuongororwa pane yakaputsika. Takawana boka rezvisiri-metallic inclusions-zvichida chidimbu checeramic yakatyoka kubva mugoko kana chidimbu cheslag-chakashanda senzvimbo yekutanga crack.
Izvi zvakatungamira kuwongororo yakazara: kuvandudza kusefa kwesimbi yedu panguva yekudira (isu takachinjira kune ceramic furo sefa mugeti system), kuongorora kwakasimba kwemagomba eceramic pamberi pegungano, uye kuita kakawanda slag skimming panguva yekunyunguduka. Iko 'kugadzirisa' kwaisava chiito chimwe chete; yaive systemic tightening yezvidzoro. Boka rinotevera rakamhanya pasina dambudziko. Kukundikana ikoko, sekurwadza kwazvaimboita, pamwe kwakaita zvakawanda kuvandudza maitiro edu kupfuura gumi nemaviri akabudirira kumhanya.
Iri ndiro divi risina kunaka. Izvo hazvisi zvekutengesa sizzle ye 'aerospace-grade'. Inyaya yekuve nemetallurgical lab, masisitimu emhando, uye tsika yekuparadza basa rako pachako, tsvaga chikonzero, uye shandura mashandiro ako. Ndiwo makore makumi matatu eruzivo rwekutaura. Iko kuunganidzwa kwezvigadziriso zvidiki, zvakaoma-zvakakunda zvinovaka maitiro akavimbika ekugadzira chimwe chinhu chinodiwa se cobalt-based alloy casting. Pakupedzisira, chikamu chinongonaka sechisungo chisina kusimba mucheni refu, kubva patani yewakisi kusvika pakuongorora kwekupedzisira.
