Kuyini i-metal sintering?

Ukucwiliswa kwensimbi, noma ukuqonda ukuthi "yini ukucwiliswa kwensimbi," kuhlanganisa ukushisisa izinto eziyimpushana ukwenza izinto eziqinile ngaphandle kokuzincibilikisa. Le nqubo emisha ibalulekile ekukhiqizeni kwesimanje njengoba ithuthukisa kakhulu izakhiwo zezinto ezibonakalayo.

• I-High-speed sintering systems isiza ukukhiqizwa okusheshayo kwezimo eziyinkimbinkimbi, ukuthuthukisa ukusebenza kahle.
• Ukuhlanganiswa nokukhiqiza okungeziwe kuqinisekisa ukunemba okukhethekile kanye nemininingwane ezingxenyeni zensimbi.
• Ukukhethwa kwezinto ezibonakalayo okunwetshiwe kwandisa izinhlobonhlobo zezinsimbi ezisebenzisekayo, ukuvula iminyango yezinhlelo zokusebenza ezintsha zezimboni.
• Ukuqedwa kwendawo okuthuthukisiwe kunciphisa isidingo sokucutshungulwa kwangemuva, okubalulekile emikhiqizweni egxile kubuhle.

Isibonelo, amabhere e-bronze ane-sintered agcina okokugcoba ngenxa yokuqina kwawo, kuyilapho izihlungi zensimbi engenasici zibekezelela amazinga okushisa aphezulu. Lezi ntuthuko zigqamisa amandla okuguqula insimbi yokucwiliswa kwensimbi ezinhlelweni ezikhethekile.

Okuthathwayo Okubalulekile

• Insimbi sinteringiphendula impushana ibe yizinto eziqinile ezinokushisa nokucindezela. Ithuthukisa amandla wezinto ezibonakalayo ngaphandle kokuncibilikisa impushana.
• Le ndlela isiza ukwenza izimo ezinemininingwane futhi inciphise imfucuza. Isebenza kahle futhi ingcono endaweni ezungezile.
• Izimboni eziningi njengezimoto nezindiza zisebenzisa i-sintering. Yenza izingxenye eziqinile eziklanyelwe ukusetshenziswa okukhethekile.

Iyini i-metal sintering futhi isebenza kanjani?

Ukulungiswa kwempushana nokubunjwa

Isinyathelo sokuqala sokucwilisa insimbi sihlanganisa ukulungisa impushana yensimbi. Lesi sigaba sinquma izici zomkhiqizo wokugcina, ngakho ukunemba kubalulekile. Abakhiqizi basebenzisa izindlela ezahlukahlukene ukwenza izimpushana, njenge-atomization, i-electrolysis, nezinqubo zamakhemikhali. I-atomization isebenza ikakhulukazi ezinsimbi ezifana nensimbi, ithusi, ne-aluminium, njengoba ikhiqiza izinhlayiya ezinhle, ezifanayo. I-Electrolysis, ngakolunye uhlangothi, ilungele izinsimbi ezihlanzekile njengethusi.

Uma impushana isidaliwe, ihlanganiswa nezithasiselo ezifana nezinto zokugcoba ukuze kuthuthukiswe ukugeleza nokuqinisekisa ukufana. Izingoma ezijwayelekile zihlanganisa insimbi, i-nickel, ithusi, nama-alloys ensimbi engagqwali. Isibonelo, izingxube ze-iron-copper zisetshenziswa kabanzi ekusetshenzisweni kwezimoto ngenxa yamandla abo nokumelana nokugqoka. Ukulungiselela kahle kuqinisekisa ukuthi impushana isilungele isigaba esilandelayo: ukuhlanganisa.

Ukuqiniswa kwempushana

I-Compaction iguqula impushana exegayo ibe "ukuhlangana okuluhlaza," umumo oqinile obambelela ndawonye ngaphambi kokucwiliswa. Ukucindezela i-die kuyindlela evame kakhulu, lapho umshini wokunyathelisa wemishini noma we-hydraulic usebenzisa ingcindezi yokwenza isimo esidingekayo. Ezingxenyeni ezidinga ukunemba okuphezulu, ukucindezela kwe-isostatic okubandayo kusebenzisa ingcindezi efanayo evela kuzo zonke izinkomba, kunciphisa amaphutha.

Izinselelo ezinjengokwehlukahlukana kwabantu noma ukuguga kwamathuluzi zingavela ngesikhathi sokuminyana. Ukubhekana nalokhu, abakhiqizi balungiselela amapharamitha afana nengcindezi futhi basebenzise izinto ezingagugi. Ukuminyana okulungile kuqinisekisa ukuthi ukuhlanganisa okuluhlaza kunobuningi obudingekayo kanye nobuqotho besakhiwo senqubo ye-sintering.

Inqubo yokushisa kanye ne-sintering

Inqubo yokucwilisa iqala ngokushisisa impushana ehlanganisiwe esithandweni ibe izinga lokushisa elingaphansi kwendawo yayo yokuncibilika. Lesi sinyathelo sibandakanya izindawo ezimbalwa: ukukhwabanisa kususa izinto zokugcoba, i-sintering bond izinhlayiya ngokusabalalisa kwe-athomu, futhi ukupholisa kuqinisa isakhiwo. Amazinga okushisa avamise ukuhluka ukusuka ku-750°C kuya ku-1,500°C, kuye ngezinto ezibonakalayo. Isibonelo, i-zirconia idinga amazinga okushisa aphezulu, azungeze i-1,500 ° C, ukuze ifinyelele ukuminyana okuhle.

Ngesikhathi se-sintering, i-particle isibopho, inciphisa i-porosity nokwandisa amandla. Le nqubo ithuthukisa izici ezifana namandla aqinile kanye nokuqina komthelela, ikwenze kubaluleke ezimbonini ezifana ne-aerospace nezimoto. Ekupheleni kwalesi sigaba, i-compact ishintsha ibe ingxenye eqinile, eqinile elungele ukusetshenziswa.

Izinto kanye nezinhlobo zezinqubo ze-sintering

Izinto ezijwayelekile ezisetshenziswa ekufakweni kwensimbi

Lapho ngikhetha izinto zokwakha zensimbi, ngihlala ngicabangela izakhiwo zabo kanye nezidingo zohlelo lokusebenza. Ezinye zezinto ezisetshenziswa kakhulu zihlanganisa:

• Insimbi engagqwali, eyaziwa ngokumelana nokugqwala.
• Ama-alloys asekelwe ethusi, anenani lokuhamba kahle kwawo kagesi.
• Insimbi, i-nickel, ne-bronze, eguquguqukayo futhi esetshenziswa kabanzi ezimbonini ezahlukahlukene.
• Izinsimbi eziyigugu njengesiliva negolide, ngokuvamilesintered for ubucwebengenxa yokukhanga kwabo kobuhle.

Okuhlungayo okunokushisa okuphezulu ekudleni nasezinhlelweni zemithi,insimbi engagqwali nezimpushana zethusizinhle. Lezi zinto zikhombisa ukuguquguquka kwensimbi yensimbi ekubhekaneni nezidingo zezimboni ezahlukahlukene.

Solid-state sintering

I-Solid-state sintering incike ekusakazweni kwe-athomu ezinhlayiyeni zebhondi ngaphandle kokwenza isigaba soketshezi. Le ndlela isebenza kangcono ezintweni ezifana nensimbi, ithusi, nezitsha zobumba ezifana ne-alumina ne-zirconia. Lezi zinto zibonisa amandla aphezulu, ukuzinza kwe-thermal, nokumelana namakhemikhali.

Ngincamela i-solid-state sintering ngobulula bayo. Ayidingi izinto zesibili futhi ifinyelela ukuminyana okuphezulu ezintweni ezifanele. Nokho, idinga amazinga okushisa aphezulu futhi inamazinga okuminyana ahamba kancane uma kuqhathaniswa nezinye izindlela.

I-liquid phase sintering

I-liquid phase sintering yethula indawo encibilika kancane eyenza isigaba soketshezi phakathi nenqubo. Lolu ketshezi lugcwalisa izimbotshana futhi luthuthukise ukuminyana. Isebenza emazingeni okushisa aphansi, inciphisa ukusetshenziswa kwamandla.

Le ndlela ilungele izitsha zobumba ezithuthukisiwe, amathuluzi okusika, nezinto ezingagugi. Isibonelo, amathuluzi we-tungsten carbide azuza ezicini ezithuthukisiwe zemishini ezizuzwa nge-liquid phase sintering. Nokho, ingase yethule ukungcola ngenxa yento yesibili.

I-Spark plasma sintering

I-Spark plasma sintering (SPS) igqama ngokushisa kwayo okusheshayo nokusebenzisa ingcindezi kusetshenziswa i-high-density pulsed current. Le nqubo ifinyeza izikhathi zomjikelezo futhi yehlise amazinga okushisa e-sintering, yonga amandla.

Ngithola i-SPS isebenziseka ngezindlela eziningi. Ingakwazi ukucubungula izinsimbi zephoyinti elincibilika eliphansi kanye nezitsha zobumba ezisezingeni lokushisa eliphezulu kakhulu ngokunemba. Ikhono layo lokulawula amapharamitha liqinisekisa imiphumela emihle, okwenza kube ukukhetha okuthandwayo kokukhiqiza okuthuthukile.

Izinzuzo, izinhlelo zokusebenza, nomehluko ekuncibilikeni

Izinzuzo ze-metal sintering

I-Metal sintering inikeza izinzuzo ezimbalwa ngaphezu kwezinqubo zendabuko zokuncibilika.

1. Ukuvumelana nezimo: I-Sintering inika amandla ukudalwa komumo oyinkimbinkimbi namajiyometri ayinkimbinkimbi okunzima ukuwafinyelela ngokulingisa.
2. Ukusebenza Kwezinto Ezibalulekile: Inqubo inciphisa imfucuza ngokuhlanganisa izimpushana zibe yizimo ezinembile, izenze zisimame.
3. Ukunemba Okuphakeme: Izingxenye ze-Sintered zifinyelela ukubekezelelana okuqinile ngenxa yamasu alawulwayo okuhlanganisa.

Ngithola i-sintering ibaluleke kakhulu ekukhiqizweni kwevolumu ephezulu. Inciphisa udoti wezinto ezibonakalayo futhi iqede isidingo sokusebenza kwesibili okubanzi, okwehlisa izindleko. Ukwengeza, intuthuko efana nobuchwepheshe be-sintering ekhishwa kancane inomthelela ekusimameni kwemvelo ngokunciphisa ukukhishwa kwekhabhoni nokusetshenziswa kwamandla.

Izicelo ezimbonini

I-Metal sintering idlala indima ebalulekile ezimbonini ezahlukahlukene. Ukuguquguquka kwayo kuvumela abakhiqizi ukuthi bakhiqize izingxenye ezinezakhiwo ezithile ezifanelana nezicelo zabo.

Isibonelo, emkhakheni wezimoto, amagiya e-sintered nama-bearings anikeza amandla aphezulu nokumelana nokugqoka. Emkhathini, izingxenye ze-sintered lightweight zithuthukisa ukusebenza kuyilapho zigcina ukuqina. Lezi zinhlelo zokusebenza zigqamisa amandla okuguqula i-metal sintering ekukhiqizeni kwesimanje.

Ukuthi i-sintering ihluke kanjani ekuncibilikeni

Ukuncibilika nokuncibilika kuhlukilengokuyisisekelo ezinqubweni zabo kanye nemiphumela. I-Sintering ihlanganisa izinto zisebenzisa ukushisa nokucindezela ngaphandle kokufinyelela endaweni encibilikayo, kuyilapho ukuncibilika kuhilela izinto zokushisisa zize zincibilike.

• I-Sintering yenzeka emazingeni okushisa aphansi, okwenza isebenzise amandla kakhudlwana.
• Yehlisa i-porosity futhi ithuthukise izinto ezibonakalayo njengamandla kanye ne-conductivity.
• Ukuncibilika, ngakolunye uhlangothi, kulungele ukulungisa kabusha izinsimbi nokuphonsa izingxenye ezinkulu njengamabhulokhi enjini.

Ngivame ukuncoma ukucula ngezinhlelo zokusebenza ezidinga ukunemba nokusebenza kahle kwezinto. Ikhono layo lokuthuthukisa izakhiwo ngaphandle kokuncibilikisa impahla lenza kube ukukhetha okuthandwayo ezimbonini ezisebenza kahle kakhulu.

I-Metal sintering iguqula izinto eziyimpuphu zibe izingxenye eziqinile ngokushisa nokucindezela, inikeze ukunemba okungenakuqhathaniswa nokusebenza kahle. Isebenza ngezimboni ezifana ne-aerospace, ezezimoto, nezokwelashwa. Intuthuko yesikhathi esizayo, efana ne-Silicon Carbide crucibles kanye ne-eco-friendly sintering, ithembisa ukusebenza kahle kwamandla okuthuthukisiwe, ukukhishwa kwekhabhoni encishisiwe, kanye nokukhiqiza okuqhubekayo. Lezi zindlela ezintsha zizochaza kabusha isayensi yezinto ezibonakalayo kanye nokukhiqizwa kwezimboni.

FAQ

Uyini umehluko phakathi kwe-sintering nokuphrinta kwe-3D?

I-Sintering isebenzisa ukushisa nokucindezela ukuze ibophe izinto eziyimpushana, kuyilapho ukuphrinta kwe-3D kwakha izinto isendlalelo ngesendlalelo. Ngivame ukuhlanganisa kokubili izingxenye eziqondile neziqinile.

Ingabe i-sintering ingasetshenziselwa izinto ezingezona ezensimbi?

Yebo,i-sintering isebenzela izitsha zobumba, ama-polymers, nezinhlanganisela. Ngiyincoma ezinhlelweni ezidinga amandla aphezulu, ukuzinza kwe-thermal, noma ukumelana namakhemikhali ezintweni ezingezona ezensimbi.

I-porosity ithinta kanjani izingxenye ze-sintered?

I-porosity ithinta amandla, ukuminyana, nokusebenza. Isibonelo, ngisebenzisa i-porous sintered bronze kuma-bearings azigcobayo, kuyilapho izingxenye eziminyene ze-sintered zifanelana nezinhlelo zokusebenza zesakhiwo.