IiSuperalloys zezixhobo zoMatshini ze-CNC
Isiqulatho
TshintshaZithini iiSuperalloys?
Igama elithi “superalloy” livela kwimfuneko yezinto ezisetyenziswa kwizixhobo ezisebenzisa ubushushu obuphezulu nezinoxinzelelo oluphezulu ezifana neeturbine zegesi, apho notshintsho oluncinci lwesakhiwo oluvela kwiziganeko ezifana nokuqhekeka lunokubangela ukungaphumeleli. I-Creep ibhekisa ekuguqukeni kancinci kwezinto eziphantsi koxinzelelo oluqhubekayo kumaqondo obushushu aphezulu, kwaye ii-superalloys zenziwe ukuze kuncitshiswe oku. Ulwakhiwo lwazo oluncinci, oluhlala lune-face-centred cubic (FCC) crystal lattice eqiniswe yi-nickel, luvumela ukuna kwezigaba zokuqinisa ezifana ne-gamma prime (γ'), enegalelo ekusebenzeni kwazo okumangalisayo kobushushu obuphezulu.
Ngokwembali, ii-superalloys zavela kwii-alloys ezilula ze-nickel-chromium ukuya kwiinkqubo ezintsonkothileyo ze-multi-element. Umzekelo, i-Inconel, i-superalloy eyaziwayo esekelwe kwi-nickel, idibanisa i-nickel ne-chromium ukuze iqinise ukumelana nokugqwala. Namhlanje, zenza i-40-50% yobunzima kwiinjini zejethi zorhwebo, nto leyo egxininisa indima yazo ebalulekileyo kwinqwelomoya. Ngaphaya kweenqwelo-moya, ii-superalloys zibalulekile kwizityalo zamandla obushushu belanga, kwiinjini zokutshintsha ubushushu ezinzima, nakwiinjini zerokhethi, apho zivumela ukusebenza kwiindawo ezirhabaxa okanye ezinobushushu obuphezulu ebezingenakwenzeka ukuba zisebenze.
Kwiimeko zokuvelisa, ii-superalloys zikhethwa ngenxa yokukwazi kwazo ukugcina uzinzo olulinganayo kunye nokuthembeka koomatshini. Nangona kunjalo, oku kuza nokutshintshana kwindlela yokusebenza, njengoko amandla azo—njengobulukhuni kunye nokuqhuba kobushushu obuphantsi—kuzenza zikwazi ukumelana neenkqubo zokusika zendabuko.
Ukuqonda ii-superalloys kuqala ngokuqaphela ukwakheka kwazo: i-nickel inika isiseko sozinzo lobushushu, ngelixa izongezo ezifana ne-aluminium kunye ne-titanium zenza iikhompawundi ze-intermetallic eziqinisa amandla.
Iipropati zeSuperalloys
Iimpawu ezibalaseleyo zee-superalloys zivela kwimilo yazo eyilwe ngononophelo, nto leyo ebenza bakwazi ukusebenza ngcono kunee-alloys ezisemgangathweni kwiimeko ezifuna amandla. Iimpawu eziphambili ziquka:
- Amandla obushushu obuphezulu kunye noZinzo: Ii-Superalloys zigcina amandla okutyhafa, ukujiya, kunye nokudinwa kumaqondo obushushu afikelela kwi-870°C okanye ngaphezulu. Umzekelo, ii-alloys ezisekelwe kwi-nickel ezifana ne-Rene 41 zibonisa amandla abalaseleyo kwiinjini zerokhethi. Oku kufezekiswa ngokuqiniswa kwesisombululo esiqinileyo kunye nokuqina kwemvula, apho izigaba ezifana ne-γ' zichasa intshukumo yokudilika.
- Ukonakala kunye noKunyangwa kwe-OxidationIzinto ezifana ne-chromium zenza iileya ze-oxide ezikhuselayo, zithintela ukubola kwiindawo ezishushu. Umzekelo, iHastelloy C-276 igqwesile ekucutshungulweni kweekhemikhali ngenxa yokuchasana kwayo nokuqhekeka kwemingxuma kunye nokuqhekeka koxinzelelo.
- I-Creep Resistance: Ii-Superalloys zinciphisa ukuguquguquka phantsi kweemeko ezixinezelekileyo ixesha elide, nto leyo ibalulekileyo kwiibhleyidi ze-turbine ezisebenza rhoqo kumaqondo obushushu aphezulu.
- Ukuqina koomatshini: Ziyakwazi ukumelana nokuguguleka okuphezulu kwaye zihambelana kakuhle nemizimba yazo, nto leyo ezenza zifaneleke kwii-implants zonyango.Iialloy ezisekelwe kwiCobalt, njengeStellite, zibonelela ngobomi bokudinwa obungcono.
- Ukuqhuba okuphantsi kobushushu kunye nokwandiswa: Le propati inceda ekulawuleni ubushushu kodwa ibangela imingeni ngexesha lokwenziwa kwemishini, njengoko ubushushu bugxila kwindawo yokusika.
- Indalo Erhabaxa NenamathelayoNangona ziluncedo ekuqineni, ezi mpawu zikhawulezisa ukuguguleka kwezixhobo kwimisebenzi ye-CNC.
Ezi mpawu zenza ii-superalloys zilungele ukusetyenziswa okufuna ixesha elide nokuthembeka, kodwa zikwafuna neendlela eziphambili zokulungisa izinto ukuze kujongwane nemiba efana nokuqina komsebenzi, apho izinto ziba nzima ngexesha lokuguqulwa.
Lilonke, ibhalansi yamandla, ukumelana, kunye nozinzo ibeka ii-superalloys njengezinto ezibalulekileyo ekutyhaleni imida yetekhnoloji.
Iintlobo zeSuperalloys
IiSuperalloys zahlulwe ngokwesiseko sazo esiphambili sesinyithi, uhlobo ngalunye lubonelela ngeenzuzo ezikhethekileyo kwizicelo ezithile. I-Elimold, umboneleli weenkonzo zoomatshini, igxininisa iintlobo ezintlanu eziphambili: i-nickel-based, i-iron-based, i-cobalt-based, i-titanium-based, kunye ne-niobium-based.
- IiSuperalloys eziSekwe kwiNickel: Eyona ixhaphakileyo, iquka ubuncinane i-50% ye-nickel kunye nezongezo ezifana ne-aluminium, i-titanium, kunye ne-chromium. Imizekelo ibandakanya i-Inconel 718 (esetyenziswa kwi-aerospace ngenxa yamandla ayo okuqhekeka) kunye ne-Hastelloy C-22 (yokumelana nokugqwala kwiindawo zeekhemikhali). Zibalasele ekumelaneni nokugqwala kumaqondo obushushu aphezulu, zilungele iibhleyidi zeturbine kunye neenjini zejethi. Uthotho olufana neMonel kunye neNimonic lubonelela ngeendidi ezahlukeneyo zeemfuno ezithile, ezifana neMonel K500 kwizicelo zaselwandle.
- I-Iron-Based Superalloys: Ezi zixuba intsimbi kunye ne-nickel okanye i-chromium, zibonelela ngokusetyenziswa kakuhle kweendleko kunye nokumelana nokuguguleka. Zisetyenziswa kwiibheringi zeenqwelo-moya kunye nezinto ezinokuba nokungqubana. Imizekelo efana ne-Incoloy 909 inika amandla amahle kodwa ayixhathisi kangako ubushushu kune-nickel variants.
- IiSuperalloys ezisekelwe kwiCobalt: Ziqulathe i-cobalt engama-50-60% ene-chromium kunye ne-tungsten, ezi alloys zinamandla aphezulu kumaqondo obushushu aphezulu kwaye zinokumelana nokugqwala okuhle kakhulu. Uthotho lweStellite, olufana neStellite 6, lusetyenziswa kwiindawo ze-turbine zegesi ezivezwe emoyeni. Zihlala ixesha elide xa zithelekiswa neentlobo ezisekwe kwi-iron okanye kwi-nickel.
- IiSuperalloys ezisekelwe kwiTitanium: Iquka i-titanium kunye ne-molybdenum ukunciphisa i-elastic modulus, ezi zaziwa ngokuqina okuphezulu. I-Ti6Al4V isetyenziswa kakhulu kwiindawo zeenqwelo-moya kunye ne-biomedical ngenxa yokuhambelana kwayo nezinto eziphilayo kunye nomlinganiselo wamandla nobunzima.
- IiSuperalloys ezisekelwe kwiNiobium: Zidla ngokuba yimixube ye-niobium-nickel, zigcina amandla ngcono kumaqondo obushushu aphezulu kunee-alloys ze-nickel ezicocekileyo, nangona zinamandla aphantsi ngokubanzi. Zisetyenziswa kwiinjini zejethi kunye neerokethi ukuze zikwazi ukumelana nobushushu.
Ezinye ii-alloys eziphawulekayo ziquka iWaspaloy (esekelwe kwi-nickel kwiiturbine zegesi) kunye neRene series (yeenqwelo-moya ezinobushushu obuphezulu). Uhlobo ngalunye lufuna iindlela ze-CNC ezilungiselelweyo ngenxa yobunzima obahlukeneyo kunye neempawu zobushushu. Ukukhetha uhlobo olufanelekileyo kubandakanya ukulinganisela iindleko, ukusebenza, kunye nokusebenza kakuhle koomatshini.
CNC Machining Overview
Umatshini wokugaya we-CNC yinkqubo yokuvelisa engaphantsi apho izixhobo ezilawulwa yikhompyutha zisusa izinto kwindawo yokusebenza ukuze zenze iindawo ezichanekileyo. Iquka imisebenzi efana nokusila (ukusika okujikeleziswayo kweemilo ezintsonkothileyo), ukujika (ukujikeleza indawo yokusebenza ngokuchasene nesixhobo esingashukumiyo), ukubhola, kunye neendlela eziphucukileyo ezifana nomatshini wokugaya we-5-axis kwiijiometri ezintsonkothileyo.
Kwii-superalloys, i-CNC ibalulekile ngenxa yesidingo sokuchaneka okuphezulu kwizinto ezifana neebhlade ze-turbine. Iinkonzo ezifana nezo zivela kwi-Elimold ziquka i-3- ukuya kwi-5-axis milling, i-Swiss machining yeenxalenye ezincinci, kunye ne-wire EDM yokunyamezelana okuqinileyo (± 0.0001″).
Oomatshini abaqinileyo kakhulu abanee-spindles eziqinileyo babalulekile ekuphatheni ukuqina kwezinto.
Imingeni kwiMachining Superalloys
Ukwenza ii-superalloys nge-CNC kunzima kakhulu ngenxa yeempawu zazo. Imingeni ephambili ibandakanya:
- Ukusebenza nzima: Le nto iqina ngokukhawuleza kwindawo yokusikwa, nto leyo ebangela ukuba izixhobo ziguge kakhulu.
- Imikhosi yokusika ephezuluAmandla azo afuna amandla amakhulu, izixhobo kunye noomatshini abacinezelayo.
- Imiba yoLawulo lweThermal: Ukusasazwa okuphantsi kobushushu kubamba ubushushu kwindawo yokusika, nto leyo ekhokelela ekuwohlokeni kwezixhobo kunye nokuphazamiseka kwemisebenzi.
- Iitships ezirhabaxa kunye ne-Edge eyakhelwe phezuluIitships zeGummy zinamathela kwizixhobo, zenze imiphetho ephazamisa ukugqitywa kunye nokuchaneka.
- Ukukhawuleziswa kokuNxiba kweZixhoboIikhabhayithi eziqinileyo kunye nee-intermetallics zibangela ukuguguleka ngokukhawuleza, zinciphise ubomi bezixhobo.
- Ukungcangcazela kunye noxinzelelo olushiyekileyoAmandla aphezulu abangela incoko, echaphazela ukunyamezela, ngelixa ubushushu bubangela uxinzelelo olunciphisa ubomi bokudinwa.
Izixhobo zemveli ze-CNC zihlala zingasebenzi kakuhle kwezi zinto, zifuna ulwazi olukhethekileyo. Ezinye iindlela ezifana ne-PECM zibonelela ngomatshini wokuchwetheza ongadibaniyo ukuze kuthintelwe ezi ngxaki, zivelise iindawo ezigudileyo ezingenazo iindawo ezichaphazeleka bubushushu.
UbuChwephesha boMachining kunye neZenzo ezilungileyo
Ukuze woyise imingeni, sebenzisa la maqhinga:
- Ukukhethwa kwesixhoboSebenzisa ii-carbide inserts ezigqunywe nge-coated xa ugoba, ii-ceramics xa ugqibezela, kunye ne-PCBN xa usenza izinto ezichanekileyo kakhulu. Ii-angles ze-rake ezintle kunye nee-chip breakers zinciphisa amandla.
- Iiparamitha ezilungiselelwe: Isantya esiphantsi (ukuthintela ukuqokelelana kobushushu), ukutya okuphakathi, kunye nobunzulu obulawulwayo. Uvavanyo oluphindaphindayo lubalulekile.
- Amaqhinga okupholisa: Isipholisi esisebenzisa uxinzelelo oluphezulu (iibha ezingaphezu kwama-70) sokupholisa kunye nokukhupha iitshiphusi; i-MQL yokuthambisa ngononophelo lwendalo.
- Umatshini kunye nokuLungisa: Oomatshini be-CNC abaqinileyo kakhulu abane-vibration damping; izixhobo eziqinileyo zokunciphisa ingxolo.
- Uyilo kunye nokuCwangciswa emva kokuSebenza: I-DFM ene-radii eninzi; unyango lobushushu emva komatshini wokunciphisa uxinzelelo; i-NDT yomgangatho.
- ezinye iindlela: Cinga ngokutyala imali kwiimo ezikufutshane ne-net ukunciphisa iimfuno ze-CNC. Izixhobo ze-carbide zanamhlanje kunye nezinto zokupholisa eziphambili ziyayitshintsha intsimi.
izicelo