Kev txhawb nqa hlau ua lub luag haujlwm tseem ceeb hauv kev tsim vaj tsev niaj hnub thiab cov chaw, muab kev txhawb nqa, kho, thiab ruaj khov. Lawv qhov kev ua tau zoo yog nyob ntawm kev xaiv thiab kev sib txuam ntawm cov khoom siv. Cov khoom sib txawv muaj cov yam ntxwv tshwj xeeb ntawm lub zog, corrosion kuj, machinability, thiab kev lag luam. Kev xaiv tsim nyog tuaj yeem ua tau raws li qhov xav tau ntawm kev thauj khoom sib txawv thiab ib puag ncig, yog li ua kom muaj kev nyab xeeb thiab kev ntseeg siab ntawm cov qauv kev txhawb nqa thoob plaws nws lub neej tag nrho.
Cov pa roj carbon steel yog ib qho ntawm cov khoom siv dav tshaj plaws rau kev txhawb nqa hlau. Nws muaj lub zog muaj zog thiab zoo weldability, thiab nws cov nqi qis, ua rau nws tsim nyog rau cov nroj tsuag kev lag luam, lub tsev thav duab, thiab cov khoom siv sib xyaw ua ke -cov kabmob. Ordinary carbon steel yog ruaj khov nyob rau hauv chav tsev kub, tab sis nws yog feem ntau ua rau corrosion nyob rau hauv ntub los yog corrosive cua. Yog li ntawd, kev kho deg xws li kub-dip galvanizing thiab txau los tiv thaiv- cov coatings feem ntau yog siv los txuas nws lub neej kev pab cuam. Rau cov ntawv thov uas xav tau kev thauj khoom siab thiab nruab nrab ib puag ncig corrosion, carbon steel tseem yog qhov kev xaiv zoo tshaj plaws thiab siv tau.
Stainless hlau muaj qhov zoo tshaj plaws hauv kev tiv thaiv corrosion thiab feem ntau yog siv rau hauv cov nroj tsuag tshuaj, khoom noj khoom haus, marine engineering, thiab cov chaw kho mob uas yuav tsum muaj kev nyiam huv thiab kav ntev. Austenitic stainless hlau, xws li 304 thiab 316 series, muaj corrosion kuj zoo heev, plasticity, thiab weldability . 316, muaj molybdenum, muaj zog tiv thaiv pitting corrosion nyob rau hauv ib puag ncig chloride. Txawm hais tias thawj zaug peev hauv stainless hlau yog siab dua, nws cov xim - dawb thiab qis - cov yam ntxwv tu kom txo tau ntev - cov nqi khiav hauj lwm hauv cov cheeb tsam hnyav.
Aluminium alloy kev txhawb nqa tau dav siv hauv aerospace, tsheb thauj mus los, kev tsim kho lub teeb, thiab cov chaw ib ntus vim lawv lub teeb yuag, siab zog, thiab zoo heev atmospheric corrosion kuj. Aluminium qhov ceev yog kwv yees li ib -peb ntawm cov hlau, yooj yim rau kev thauj mus los thiab kev teeb tsa. Nws kuj tsim cov yeeb yaj kiab oxide ntom ntom hauv ib puag ncig ntuj, muab kev tiv thaiv tus kheej -. Txawm li cas los xij, nws cov qauv qis dua ntawm elasticity yuav tsum tau ua kom zoo dua tus ntoo khaub lig-section thiab stiffening tsim los xyuas kom meej rigidity nyob rau hauv hnyav loads los yog siab - zaus vibrations. Tsis tas li ntawd, nws cov weldability yog qis dua rau cov hlau, feem ntau xav tau kev sib txuas ntawm cov tshuab lossis cov txheej txheem vuam tshwj xeeb.
Weathering steel yog ib hom hlau tsim nrog cov tshuaj tshwj xeeb los tsim cov txheej txheem xeb ruaj khov ntawm nws qhov chaw, yog li ua kom qeeb ntxiv corrosion. Nws yog feem ntau siv rau hauv cov txuas hniav, cov vaj tse toj roob hauv pes, thiab kev txhawb nqa sab nraum zoov loj, tshem tawm qhov xav tau ntawm kev pleev xim rau thaum tswj xyuas cov khoom zoo. Weathering steel qhov zoo nkauj zoo nkauj xim xim sib xyaw nrog lub ntuj puag ncig, tab sis nws qhov pib corrosion kuj ceev, yuav tsum tau xav txog nws cov kev cuam tshuam rau cov chaw nyob ib puag ncig thiab cov kua dej thaum lub sijhawm tsim.
Rau qhov kub thiab txias ib puag ncig, cua sov-cov hlau tsis muaj zog thiab qis-kub toughness steel muaj cov kev daws teeb meem tshwj xeeb. Thaum tshav kub kub- steel resistant tuav lub zog thiab oxidation kuj nyob rau hauv siab - kub tej yam kev mob xws li metallurgical furnaces thiab boiler txhawb; low-kub toughness steel tiv thaiv qis- kub nkig tawg nyob rau hauv cov cheeb tsam txias los yog liquefied gas cia chaw, xyuas kom meej tias cov kev them nyiaj yug tsis poob dheev nyob rau hauv tej yam loads. Cov khoom tshwj xeeb no - lub hom phiaj steel xav tau cov khoom siv xaiv thiab kev tswj cov txheej txheem vuam raws li qhov tshwj xeeb ntawm qhov kub thiab txias thiab cov yam ntxwv ntawm kev ua haujlwm.
Hauv cov ntsiab lus, cov ntaub ntawv tseem ceeb ntawm cov hlau txhawb txhua tus muaj lawv qhov zoo thiab siv tau ntau yam. Kev xaiv cov khoom yuav tsum muaj kev xav txog kev ntsuas kev thauj khoom, ib puag ncig, kev saib xyuas cov tswv yim, thiab kev lag luam. Nrog rau kev nce qib hauv cov khoom siv thev naus laus zis, kev siv cov khoom sib xyaw ua ke thiab siab - alloys kev ua tau zoo tau nthuav dav qhov kev ua tau zoo ciam teb ntawm kev txhawb nqa, ua rau lawv ua lub luag haujlwm txhawb kev ntseeg siab hauv ntau qhov teeb meem engineering.