Isebenza njani iPowder Metallurgy?

Ngaba wakha wajongana nonxunguphalo lwenkunkuma ephezulu, ububhetyebhetye boyilo obunyiniweyo, okanye ukungakwazi ukuvelisa iimilo ezintsonkothileyo ngomsebenzi wesinyithi wesintu? Le mingeni inokuthintela inkqubo yakho yokuvelisa, yandise iindleko, kwaye inciphise umda wakho wokukhuphisana.

Faka i-powder metallurgy (PM) - inkqubo yokuguqula isinyithi ejongene nale miba ngokuthe ngqo. I-PM inikezela ngendlela entsha yokudala umgangatho ophezulu, amacandelo esinyithi anzima kunye nenkunkuma encinci, ukuchaneka okungahambelaniyo, kunye neendleko ezifanelekileyo.

Isebenza njani iPowder Metallurgy?

Isinyithi somgubo (PM)yinkqubo yokubumba isinyithi eguquguqukayo kakhulu eguqula umgubo wentsimbi ube ngamacandelo aqinileyo. Nalu ucazululo oluneenkcukacha lwendlela esebenza ngayo:

Ukuveliswa komgubo

Inkqubo iqala ngemveliso yeumgubo wentsimbi, enokuthi iphunyezwe ngeendlela ezahlukeneyo ezifana nokusila, ukutyumza, i-atomization, okanye ukuphendula kweekhemikhali. Iintsimbi eziqhelekileyo ezisetyenziswe kwi-PM ziquka isinyithi, intsimbi, ubhedu, ubhedu, kunye ne-aluminium. Indlela nganye yokuvelisa umgubo ichaphazela ubungakanani besuntswana, imilo, kunye nobunyulu, nto leyo enefuthe kwiipropati zecandelo lokugqibela.

Ukudibanisa kunye nokudibanisa

Emva koko, iipowder zetsimbi zixutywe kunye nezongezo, izibophelelo, okanye i-lubricant ukufezekisa iimpawu ezifunwayo kunye neempawu. Eli nyathelo libalulekile njengoko livumela ukudalwa kwee-alloys ezintsha ngokudibanisa izinto ezahlukeneyo. Ukuxuba okuchanekileyo kunye nokuxutywa kwe powders kuqinisekisa ukufana kunye nokuhambelana kwimveliso yokugqibela.

Ukuhambelana

Umgubo oxutywe emva koko uxinzelelwe kwisimo esifunwayo usebenzisa uxinzelelo oluphezulu, inkqubo eyaziwa ngokuba yi-compaction. Oku kunokwenziwa ngeendlela ezinje nge-cold die compaction, i-isostatic pressing, okanye ukuxinwa okushushu. Uxinzelelo ngokuqhelekileyo lusuka kwi-150 MPa ukuya kwi-700 MPa, ukuqinisekisa ukuba iincinci ze powder zihlanganiswe ngokuqinileyo. Eli nqanaba libalulekile ekufezekiseni imfezeko yesakhiwo kunye noxinaniso olufunekayo kwicandelo.

Sintering

Le ndawo idityanisiweyo iye ifakwe kwi-sintering, apho ifudunyezwa kwiqondo lobushushu elingaphantsi kwendawo yokunyibilika kwesinyithi kwindawo elawulwayo. Le nkqubo ivumela iincinci zetsimbi ukuba zidibanise kunye, zenze inxalenye eqinile, ehlala ixesha elide. I-Sintering iphucula iimpawu zemishini yecandelo, njengamandla kunye nokuqina, okwenza ukuba ilungele izicelo ezahlukeneyo.

Ngoku ukuba siyaqonda isisekoinkqubo ye powder metallurgy, masingene nzulu kwimigaqo eyenza obu bugcisa busebenze. Siza kuphinda siphonononge ubucukubhede benkqubo ye-sintering kwaye siqaqambise ezona nzuzo ziphambili ze-PM ngaphezulu kweendlela zemveli zesinyithi.

Yintoni uMgaqo wePowder Metallurgy?

Umgaqo we-powder metallurgy usekukwazini kwawo ukwenza amacandelo esinyithi ngolawulo oluchanekileyo malunga nokwakheka kunye ne-microstructure. Ngokuxhaphaza ubungakanani, imilo, kunye nokusabalalisa i-powder zetsimbi, i-PM inokuvelisa iinxalenye ezineepropati ezilungiselelweyo, njengamandla aphuculweyo, ukumelana nokugqoka, kunye ne-thermal conductivity. Oku kuchanekileyo kwenza i-PM ilungele ukuvelisa iimilo ezintsonkothileyo kunye noyilo oluntsonkothileyo oluya kuba ngumngeni okanye lungenzeki ngeendlela zemveli.

Isebenza njani inkqubo yeSintering kwiPowder Metallurgy?

Ngexesha le-sintering, umgubo wesinyithi odibeneyo ufudunyezwa kwiqondo lobushushu elithile elingaphantsi kwendawo yokunyibilika kodwa liphezulu ngokwaneleyo ukwenzela ukuba i-athomu isasazeke. Le nkqubo ibangela ukuba iinqununu zetsimbi zibophe kwinqanaba le-athomu, ukuphelisa i-porosity kunye nokwandisa ubuninzi becandelo. I-atmospheres elawulwayo, efana ne-inert gases okanye i-vacuum, isetyenziselwa ukukhusela i-oxidation kunye nokungcoliswa. I-Sintering inokulungiswa kakuhle ukufezekisa iipropati ezifunwayo zemishini, okwenza kube yinyathelo elibalulekileyo kwinkqubo ye-PM.

Zeziphi ezona zinto ziluncedo ngokuSebenzisa iMetallurgy yomgubo ngaphezu kweendlela zesiNtu zokuSebenza ngesinyithi?

I-metallurgy yomgubo ibonelela ngeenzuzo ezininzi ezibalulekileyo kwiindlela zemveli zesinyithi:

1. Iimilo ezintsonkothileyo kunye nokunyamezelwa okuqinileyo:I-PM ivumela ukuveliswa koyilo oluntsonkothileyo kunye neejometri ezintsonkothileyo ezinzima okanye ezingenakwenzeka ukufikelela ngeendlela zemveli.
2. Iindleko-Ngempumelelo:I-PM iphumelele kakhulu kwimveliso yobuninzi yamacandelo amancinci, ukunciphisa inkunkuma yezinto eziphathekayo kunye neendleko zokuvelisa ngokubanzi.
3. Ukusetyenziswa kwezinto:Ukuya kuthi ga kwi-97% yemathiriyeli yokuqala isetyenziswe kwimveliso yokugqibela, isenza i-PM ibe yinkqubo yokwenziwa kwemveliso enobuhlobo nokusingqongileyo.
4. Ii-alloys ezikhethekileyo kunye neMathiriyeli:I-PM yenza ukuba kudalwe izinto ezizodwa kunye ne-alloys ezingenakwenzeka ngezinye iindlela, ukubonelela ngeempawu zokusebenza eziphuculweyo.
5. Ukungqinelana kunye nokuchaneka:Ubume obulawulwayo be-PM buqinisekisa ukuhambelana okuphezulu kunye nokuchaneka kumacandelo okugqibela, okukhokelela ekusebenzeni okungcono kunye nokuthembeka.

Ukuqukumbela

Isishwankathelo, i-powder metallurgy yinkqubo yokuguqula isinyithi esilungisa imida yeendlela eziqhelekileyo zesinyithi. Ngokuqonda imigaqo ye-PM, ubuqhetseba benkqubo ye-sintering, kunye neenzuzo ezininzi ezinikezelayo, abavelisi banokusebenzisa le teknoloji ukuvelisa izinto eziphezulu, ezingabizi, kunye nezizinzileyo zetsimbi. Njengoko amashishini eqhubeka nokuvela, ukwamkelwa kweendlela ezintsha ezifana nesinyithi somgubo kuya kuba ngundoqo ukuze uhlale ukhuphisana kunye nokuhlangabezana neemfuno zemveliso yanamhlanje.