I-Metallurgy ku-Military and Defense Applications
I-Metallurgy—ucwaningo lwesakhiwo, izakhiwo, ukucubungula, kanye nokusebenza kwezinsimbi kanye nezinsimbi zazo—kudlala indima ebalulekile emikhakheni yezempi kanye nezokuvikela. Ngemuva kokuqina kwezimoto zokulwa, ukunemba kwezinhlelo zezikhali, ukuqina kwemikhumbi yempi, kanye nokuvikelwa kwabasebenzi endaweni yokusebenza, kukhona intuthuko eqhubekayo yokusungula izinto ezintsha zensimbi. Impi yanamuhla idinga izinto ezingeqi nje kuphela, kodwa futhi ezilula, ezingagqwali, ezikwazi ukumelana namazinga okushisa aphezulu, futhi ezihlala zithembekile ngaphansi kwemithwalo enamandla njengokudlidliza, ukuqhuma, kanye nokushintsha kwengcindezi.
Kungani i-Metallurgy ibalulekile ekuzivikeleni?
Izinhlelo zokusebenza zempi zibeka izinto ngaphansi kwezimo ezimbi kakhulu kunezinhlelo zokusebenza zomphakathi. Izinto kumele zibhekane nemithelela yokudutshulwa, amagagasi okushaqeka, ukushisa okukhulu okuvela ekungqubuzaneni noma ekushiseni, kanye nezindawo ezinolaka njengamanzi olwandle kanye nomoya omanzi. Ngaphezu kwalokho, izidingo zokuhamba ziqhuba ukwehla kwesisindo ngaphandle kokulahlekelwa ukuvikelwa. Yilapho i-metallurgy iba khona khona: ngokukhetha i-alloy, ukwelashwa kokushisa, ukwakheka kwesakhiwo esincane, kanye namasu okukhiqiza, onjiniyela bangenza ngcono ukusebenza kwezinto ngokwezidingo ezithile.
Insimbi Yezikhali Nokuvela Kokuvikelwa
Insimbi isalokhu ingumgogodla wokuvikelwa kwezimoto zempi kanye nezakhiwo zokuzivikela ngenxa yokuhlanganiswa kwayo kwamandla, ukuqina, ukulula kokukhiqizwa, kanye nokusebenza kahle kwezindleko. Kodwa-ke, "insimbi" yezinhloso zempi akuyona nje noma iyiphi insimbi. Izinsimbi zempi zanamuhla zaklanywa ngezakhiwo ezincane ezilawulwa ngokuqinile—njenge-martensite ethambile, i-bainite, noma izakhiwo ezixubile—ukuze zimunce amandla okushaya ngaphandle kokuphuka okubuthakathaka.
Izigaba ezibalulekile zifaka phakathi i-high hardness armor (HHA) kanye ne-rolled homogeneous armor (RHA). I-HHA inikeza ubulukhuni obuphezulu bokumelana nokungena, kuyilapho i-RHA inikeza ibhalansi engcono phakathi kobulukhuni nokuqina. I-Metallurgy idlala indima ekunqumeni ukwakheka kwe-alloy (isb., i-Ni, Cr, Mo eyengeziwe) kanye nezinqubo zokwelapha ukushisa ukuze kufezwe izakhiwo ezifunwayo zemishini. Inselele enkulu ukugwema ubuthaka, ikakhulukazi emazingeni okushisa aphansi noma endaweni yokushisela (indawo ethinteke ukushisa) ngesikhathi sokuhlanganiswa.
I-Aluminium Alloy: Ilula kakhulu kuma-Mobility and Air Platforms
Ezindizeni, ezindizeni ezinophephela emhlane, ezindizeni eziqhutshwa ngama-drone, kanye nezinye izingxenye zezimoto zempi, ama-aluminium alloys ayisinqumo ngenxa yesilinganiso sawo esihle samandla nesisindo. Ama-alloys ochungechunge lwe-2xxx (Al-Cu) kanye ne-7xxx (Al-Zn-Mg-Cu) asetshenziswa kabanzi ezakhiweni zezindiza. Ukumelana nokukhathala kubalulekile ngoba izakhiwo zezindiza zibhekana nemijikelezo yomthwalo eqhubekayo.
Yilapho i-metallurgy ebonakalayo idlala khona indima ngokulawula imvula (ukuqina kokuguga), ukwelashwa kokushisa (ukwelashwa kwesisombululo kanye nokuguga okwenziwe), kanye nokukhethwa kwezinqubo zokwakha. Nakuba iqinile futhi ilula, i-aluminium isengozini yokushisa okuphezulu kanye nezinhlobo ezithile zokugqwala (njengokuqhekeka kokugqwala kokucindezeleka), okudinga ukwakheka ngokucophelela, ukumbozwa okuvikelayo, kanye nokuhlolwa njalo.
I-Titanium nama-Superalloy: Ukusebenza Okuphezulu Ngaphansi Kwezimo Ezibucayi
I-Titanium isetshenziselwa izinhlelo zokusebenza ezidinga amandla aphezulu, isisindo esiphansi, kanye nokumelana nokugqwala, ikakhulukazi ezisekelweni ezisemoyeni kanye nezingxenye ezisebenza emazingeni okushisa aphakathi. Ithandwa kakhulu ezakhiweni zezindiza ezisebenza kahle kakhulu, izingxenye ezithile zenjini, kanye nezingxenye ezidinga ukumelana namakhemikhali.
Emazingeni okushisa adlulele kakhulu—njengakuma-turbine enjini yejethi—kusetshenziswa ama-superalloy asekelwe ku-nickel. Ama-Superalloy aklanyelwe ukugcina amandla emazingeni okushisa aphezulu, ukumelana nokuqhekeka (ukuguquguquka okuhamba kancane), kanye nokumelana nokushiswa kwe-oxidation. Ukwakheka kwe-Superalloy microstructural kuhilela ukuqinisa izigaba ezifana ne-gamma prime (γ'), ezilawulwa ngokwakheka kwe-alloy kanye nezinqubo zokwelapha ukushisa. Ukuthembeka kwezingxenye ze-turbine kubalulekile ekusebenzeni kahle nasekuphepheni kwemisebenzi yezindiza yezempi.
Izinto Zokusebenzisa Izikhali Nezikhali: Amandla, Ukuqina, Nokunemba
Ukusetshenziswa kwensimbi ezinhlelweni zezikhali kuhlanganisa imiphongolo, izindlela zokudubula, ama-projectiles, kanye nezingubo zokugqoka kanye nezingxenye ezisekelayo. Imiphongolo yezibhamu, isibonelo, idinga inhlanganisela yobunzima bomphezulu ukuze imelane nokuguguleka kanye nokuqina kwengaphakathi ukuze kuvinjelwe ukuqhekeka ngaphansi kokucindezeleka kokusha. Amasu anjengokwelashwa kokushisa, ukugqoka, kanye nokuqina komphezulu asetshenziswa ukwandisa impilo yawo yokusebenza.
Kuma-projectiles kanye nama-penetrator, izinto kumele zibe nobukhulu obukhulu, ukuqina, kanye nekhono lokugcina isimo sazo lapho zishayisana. Ngokuphambene nalokho, izimbobo zezibhamu kanye nezingxenye zesistimu yokuqalisa zidinga izinga lokushisa kanye nokumelana nokugqwala, ikakhulukazi ukuze zigcinwe isikhathi eside. Ukunemba kwensimbi nakho kunquma ukuhambisana kwezakhiwo zezinto kusukela eqenjini elilodwa lokukhiqiza kuya kwelinye, okubalulekile ezindinganisweni zempi.
Imikhumbi Yempi Nemvelo Yasolwandle: Ukugqwala Njengesitha Esiyinhloko
Indawo yasolwandle ingenye yezindawo eziyingozi kakhulu ngezinsimbi. Amanzi olwandle asheshisa ukugqwala kwe-galvanic, imigodi, kanye nokugqwala kwe-crevice, ikakhulukazi ezindaweni ezihlanganayo nezindawo ezinokugeleza okungalingani. Ngakho-ke, i-metallurgy ekwakhiweni kwemikhumbi yempi igcizelela ukukhethwa kwezinto, ukwakheka kwamalunga, kanye nokuvikelwa kokugqwala ngopende okhethekile, ama-anode omhlatshelo, noma izinhlelo zokuvikela i-cathodic.
Insimbi ekhethekile yasolwandle, izinsimbi ezithile zethusi, kanye nensimbi engagqwali ezindaweni ezibalulekile kuyasetshenziswa ukunciphisa ingozi yokugqwala. Kodwa-ke, ngisho nensimbi engagqwali ingahlushwa ukugqwala uma ingakhethwanga kahle futhi icutshungulwe. Amasu okuvikela olwandle awagcini nje ngokuba namandla omkhumbi, kodwa futhi nokuqina kwesikhathi eside kanye nokulula kokugcinwa.
Ukushisela kanye nobuqotho besakhiwo: Amaphuzu Abalulekile Ekukhiqizweni Kwezempi
Ukwehluleka okuningi kwesakhiwo akwenzeki ezintweni eziyinhloko, kodwa kuyenzeka emajoyintini ahlanganisiwe. Ukushisela kungashintsha isakhiwo esincane futhi kudale ukucindezeleka okusele, kunciphise ukuqina noma kwandise ukuthambekela kokuqhekeka. Esimweni sokuzivikela, ubuqotho bamalunga bubalulekile ngoba izimoto nemikhumbi zingabhekana nemithwalo yokushaqeka, ukudlidliza, kanye nokucindezela ngezikhathi ezithile.
I-Welding metallurgy ihlanganisa ukukhethwa kwenqubo yokushisela, ukwelashwa kokushisa kwangaphambi kokushisa kanye nokwelashwa kokushisa ngemva kokushisela, ukulawula ukufakwa kokushisa, kanye nokukhethwa kwezinsimbi zokugcwalisa ezihambisanayo. Ukuhlolwa okungabhubhisi (NDT) okufana ne-rayography, i-ultrasonics, kanye nokuhlolwa kokungena kwedayi kuvame ukudingeka ukuqinisekisa ukungabikho kwamaphutha abalulekile.
Ubuchwepheshe Bomphezulu: Ukugqoka Nokuvikela Okunemisebenzi Eminingi
Ngaphezu kwezakhiwo ezinkulu zezinto, ukusebenza kwezempi kuvame ukuncika kubuchwepheshe bomphezulu: ukuvikela ukugqwala, ukuvimbela ukuguguleka, kanye nokuvikela ukushisa. Isibonelo, ukuvikela ukushisa kusiza ukuvikela izingxenye zenjini emazingeni okushisa aphezulu. Ukuvikela kunganciphisa nokungqubuzana, kwandise ukumelana nesihlabathi nothuli, noma kunikeze izakhiwo ezithile "eziyimfihlo" ezihlobene nokukhanya kwe-electromagnetic—yize lezi zingeyona indawo ye-metallurgy kuphela, kodwa noma kunjalo zihlobene eduze nobunjiniyela bezinto.
Ukukhiqiza Kwanamuhla: Kusukela Ekusetshenzisweni Kwensimbi Eyimpuphu Kuya Ekukhiqizeni Okungeziwe
Intuthuko yezokuvikela incike kakhulu ezinqubweni zokukhiqiza ezithuthukisiwe. I-powder metallurgy ivumela ukudalwa kwezingxenye ezinembile ezine-porosity elawulwayo noma ama-alloy okunzima ukuwakhiqiza ngokusebenzisa ukuphonswa okuvamile. Okwamanje, ukukhiqizwa okungeziwe (i-AM), noma ukuphrinta kwensimbi kwe-3D, kunikeza amathuba okukhiqizwa kwezingxenye okusheshayo, ukusheshisa i-prototyping, kanye nemiklamo yangaphakathi eyenziwe ngcono njengezakhiwo ze-lattice zokunciphisa isisindo.
Kodwa-ke, i-AM iletha izinselele ezintsha ze-metallurgical: i-anisotropy yezakhiwo zemishini, ama-micropores, imifantu eshisayo, kanye nokwehluka kwesakhiwo ngenxa yokujikeleza okusheshayo kokushisa. Ngakho-ke, ukusetshenziswa kwe-AM empini kudinga amazinga aqinile ekhwalithi, ukuqinisekiswa kwezinto, kanye nokucutshungulwa ngemuva kokucubungula njengokucindezela okushisayo kwe-isostatic (HIP) kanye nokwelashwa kokushisa.
Iziqondiso Zesikhathi Esizayo: Izinto Ezilula, Eziqinile, Nezihlakaniphile
Kusukela manje, izidingo zempi zizoqhuba ukuthuthukiswa kwama-alloy asezingeni eliphezulu kanye nezinhlanganisela: izizukulwane ezintsha zezinsimbi eziqinile kakhulu, ama-alloy alula, amelana nokushisa, kanye nezinto ezisebenza kahle ezihlanganisa amandla esakhiwo nezinye izakhiwo ezifana nokuvinjelwa kokudlidliza noma ukumelana nogesi. Ucwaningo luphinde luqhubekele ezintweni "ezinomklamo wesakhiwo esincane" oqondile ngokusebenzisa ukulingisa kokubala kanye nobunjiniyela bezinqubo.
Ekugcineni, i-metallurgy ingaphezu nje kwesayensi yezinsimbi; iyisisekelo sobuchwepheshe besimanje bokuzivikela. Inquma ukuthi amasosha aphephile kangakanani ensimini, ukuthi izimoto nezindiza zithembeke kangakanani, nokuthi izinhlelo zezikhali zingasebenza isikhathi esingakanani ngaphansi kwezimo ezimbi kakhulu. Ezweni elishintshayo neliyinselele, ikhono lesizwe lokwazi i-metallurgy ethuthukisiwe liyingxenye ebalulekile yokuqina kwesizwe kanye nokuzimela kwezobuchwepheshe bokuzivikela.
