Hauv kev lag luam steel, peb feem ntau hnov txog cov ntsiab lus ntawm kub dov thiab txias dov, yog li lawv yog dab tsi?
Qhov tseeb, cov ntawv hlau uas tsim los ntawm cov nroj tsuag steelmaking tsuas yog cov khoom tiav ib nrab thiab yuav tsum tau muab dov rau ntawm lub tshuab dov kom dhau los ua cov khoom tsim nyog steel.Kub dov thiab txias dov yog ob qho txheej txheem dov.
Lub dov ntawm cov hlau yog tsuas yog ua los ntawm kub dov, thaum txias dov yog tsuas yog siv los tsim me me steel seem thiab nyias daim hlau.
Cov hauv qab no yog cov xwm txheej txias thiab kub dov ntawm steel:
Hlau: nrog ib txoj kab uas hla ntawm 5.5-40 millimeters, coiled nyob rau hauv coils, tag nrho cov ua los ntawm cov khoom kub dov.Tom qab kos duab txias, nws belongs rau cov khoom siv kos duab txias.
Round steel: Ntxiv rau qhov ua kom pom tseeb ntawm cov ntaub ntawv ci, nws feem ntau yog kub dov thiab tseem muaj cov ntaub ntawv forged (nrog cov cim forging ntawm qhov chaw).
Sawb steel: ob qho tib si kub-kuav los tiag thiab txias-kuav los tiag yog muaj, thiab cov khoom txias-dov yog feem ntau nyias.
Hlau phaj: Txias dov phaj yog feem ntau nyias, xws li tsheb phaj;Muaj ntau qhov kub-dov nruab nrab thiab tuab daim hlau, qee qhov muaj cov tuab zoo ib yam li cov khaub thuas dov, tab sis lawv cov tsos yog txawv heev.Lub kaum sab xis steel: tag nrho cov kub dov.
Cov kav hlau: ob qho tib si welded, kub dov, thiab txias kos.
Channel steel thiab H-shaped steel: kub dov
Steel tuav: cov ntaub ntawv kub-dov.
Kub dov thiab txias dov yog ob qho tib si txheej txheem rau kev tsim cov hlau phaj los yog cov profiles, uas muaj kev cuam tshuam loj rau cov microstructure thiab cov khoom ntawm cov hlau.
Lub dov ntawm cov hlau yog tsuas yog raws li kub dov, thaum txias dov feem ntau tsuas yog siv los tsim precision loj steel xws li cov hlau me me thiab nyias daim hlau.
Qhov ntsuas kub ntawm qhov kub dov feem ntau yog 800-900 ℃, thiab tom qab ntawd nws feem ntau txias hauv huab cua, yog li lub xeev kub dov yog sib npaug rau normalizing kev kho mob.Feem ntau cov hlau yog dov siv txoj kev kub dov.Cov hlau xa tuaj rau hauv qhov kub-dov, vim qhov kub thiab txias, tsim cov txheej txheem hlau oxide rau ntawm qhov chaw, uas muaj qee qhov kev tiv thaiv corrosion thiab tuaj yeem khaws cia sab nraum zoov.Tab sis txheej txheej ntawm hlau oxide no kuj ua rau saum npoo ntawm kub dov hlau ntxhib, nrog rau qhov loj me me hloov pauv.Yog li ntawd, steel uas yuav tsum tau ib tug du nto, meej me me, thiab zoo mechanical zog yuav tsum tau tsim siv kub dov semi-tiav los yog tiav cov khoom raws li raw cov ntaub ntawv thiab ces txias dov.
Qhov zoo: ceev molding ceev, siab yield, thiab tsis muaj kev puas tsuaj rau txheej.Nws tuaj yeem ua rau ntau cov ntawv hla ntu kom tau raws li qhov xav tau ntawm kev siv cov xwm txheej;Txias dov tuaj yeem ua rau cov yas deformation tseem ceeb ntawm cov hlau, yog li ua rau nws cov ntsiab lus tawm los.
Disadvantages: 1. Txawm hais tias tsis muaj thermal yas compression thaum lub sij hawm tsim cov txheej txheem, residual stress tseem muaj nyob rau hauv seem, uas inevitably cuam tshuam rau tag nrho thiab lub zos buckling yam ntxwv ntawm cov hlau;
2. Cov style ntawm txias-kuav los tiag steel feem ntau yog ib qho qhib seem, uas txo cov dawb torsional nruj ntawm seem.Torsion feem ntau tshwm sim thaum raug khoov, thiab khoov torsion buckling yog nquag tshwm sim thaum raug compression, ua rau tsis zoo torsional kev ua haujlwm;
3. Cov txheej txheem txias-kuav los tiag steel muaj cov phab ntsa me me thiab tsis muaj thickening ntawm cov ces kaum ntawm cov phaj kev sib txuas, uas ua rau muaj peev xwm tsis muaj zog tiv taus cov khoom siv hauv cheeb tsam.
Txias dov yog hais txog txoj kev dov ntawm kev hloov cov duab ntawm cov hlau los ntawm kev nyem nws nrog lub siab ntawm cov yob yob ntawm chav tsev kub.Txawm hais tias cov txheej txheem ua haujlwm kuj tuaj yeem ua rau cov phaj steel kom sov, nws tseem hu ua txias dov.
Tshwj xeeb, txias dov siv kub-kuav los tiag steel coils raws li raw cov ntaub ntawv, undergoes acid ntxuav kom tshem tawm oxide nplai, thiab ces undergoes siab ua los tsim dov nyuaj coils.Feem ntau, cov hlau txias txias xws li galvanized thiab xim hlau daim hlau yuav tsum tau muab tshem tawm, yog li lawv cov yas thiab elongation kuj zoo, thiab lawv tau siv dav hauv kev lag luam xws li tsheb, khoom siv hauv tsev, thiab kho vajtse.
Qhov saum npoo ntawm daim ntawv txias-kuav los tiag muaj qee qhov kev sib tw, thiab nws zoo nkaus li tus kov, feem ntau yog los ntawm kev ntxuav cov kua qaub.Qhov saum npoo du ntawm cov ntawv kub-kuav los tiag feem ntau tsis ua raws li qhov yuav tsum tau ua, yog li kub-kuav los tiag steel strips yuav tsum tau txias-dov.Qhov thinnest thickness ntawm kub dov steel strips feem ntau yog 1.0 hli, thiab txias-dov hlau strips tuaj yeem ncav cuag 0.1 hli.
Kub dov yog dov saum lub crystallization kub taw tes, thaum txias dov yog dov hauv qab ntawm crystallization kub taw tes.Kev hloov pauv hauv cov duab hlau los ntawm kev txias dov belongs rau qhov txias txias deformation, thiab kev ua haujlwm txias txias los ntawm cov txheej txheem no ua rau kom lub zog thiab hardness ntawm dov hard coil, thaum lub toughness thiab plasticity Performance index txo.
Rau kev siv kawg, txias dov deteriorates stamping kev ua tau zoo thiab cov khoom tsim nyog rau qhov yooj yim deformed.
Qhov zoo: Nws tuaj yeem rhuav tshem cov qauv ntawm cov hlau ingots, ua kom zoo dua cov nplej loj ntawm cov hlau, thiab tshem tawm cov teeb meem hauv microstructure, yog li ua rau cov qauv hlau ntom ntom thiab txhim kho nws cov khoom siv kho tshuab.Qhov kev txhim kho no feem ntau yog tshwm sim hauv kev taw qhia ntawm dov, kom cov hlau tsis muaj isotropic rau qee yam;Cov npuas, tawg, thiab looseness tsim thaum lub sij hawm pouring kuj yuav welded nyob rau hauv siab kub thiab siab.
Disadvantages: 1. Tom qab kub dov, tsis yog-hlau inclusions (tsuas yog sulfides thiab oxides, thiab silicates) nyob rau hauv cov hlau yog nias rau hauv nyias nyias, uas ua rau delamination.Txheej txheej zoo heev deteriorates tensile kev ua tau zoo ntawm steel raws li thickness kev taw qhia, thiab muaj peev xwm ntawm interlayer tearing thaum lub sij hawm weld shrinkage.Lub hauv paus strain induced los ntawm weld seam shrinkage feem ntau ncav cuag ob peb lub sij hawm cov yield point strain, uas yog ntau npaum li cas loj tshaj lub strain tshwm sim los ntawm load;
2. Kev ntxhov siab uas tshwm sim los ntawm qhov tsis sib xws.Residual stress yog hais txog qhov kev ntxhov siab uas nws tus kheej sib npaug sab hauv yam tsis muaj kev quab yuam sab nraud, thiab muaj nyob rau hauv ntau qhov kub-kuav los tiag steel seem.Feem ntau, qhov loj dua qhov loj ntawm cov hlau, qhov ntau dua qhov kev ntxhov siab seem.Txawm hais tias residual kev ntxhov siab yog qhov sib npaug ntawm tus kheej, nws tseem muaj qee yam cuam tshuam rau kev ua haujlwm ntawm cov khoom siv hlau hauv qab sab nraud.Nws tuaj yeem muaj kev cuam tshuam tsis zoo rau kev deformation, stability, qaug zog tiv thaiv, thiab lwm yam.
Post lub sij hawm: Feb-22-2024