● Slitting Feasibility thiab Txheej Txheem Paub meej
ASTM A606-4 yog lub siab-lub zog qis-alloy (HSLA) huab cua steel, nrog cov ntsiab lus ntawm cov pa roj carbon monoxide (tsawg dua lossis sib npaug li 0.18%) thiab cov ntsiab lus alloy (Cu, Cr, P) uas ua kom zoo dua nws cov ductility thiab formability, yog li nws tuaj yeem hlais mus rau hauv nqaim strips ntawm qhov dav sib txawv yam tsis muaj ntug tawg lossis deformation.
Slitting tool thiab parameter xav tau: It is necessary to use high-hardness, sharp slitting blades with a reasonable edge profile, and control the slitting speed within 60-80m/min; for coils with a thickness of ≤3mm, the back tension can be controlled at 10-15% of the yield strength, and for coils with a thickness of >3 hli, qhov nro rov qab yuav tsum tau txo mus rau 5-10% kom tsis txhob deformation ntawm ntug
Ntug tiv thaiv: Tom qab slitting, ntug ntawm steel sawb yuav tsim me ntsis burrs, uas yuav raug tshem tawm los ntawm deburring kev kho mob; thaj tsam puas ntsoog ntawm oxide txheej ntawm ntug yuav cia li kho lub patina tsis pub dhau 1-2 lub lis piam nyob rau hauv ib puag ncig ntuj, tsis muaj kev cuam tshuam tag nrho corrosion kuj.
Kev xaiv ua haujlwm: Raws li qhov xav tau, cov hlua hlau slit kuj tuaj yeem raug kho rau ntug kev sib tsoo lossis chamfering, uas yog qhov tsim nyog rau kev ua haujlwm tom ntej xws li khoov thiab vuam.
●Flattening Feasibility thiab txheej txheem cov ntsiab lus
Lub coil teeb (lub ntuj curvature tsim thaum lub sij hawm coiling) ntawm ASTM A606-4 kauj tuaj yeem raug tshem tawm los ntawm kev ua haujlwm flattening, thiab cov nplooj ntawv hlau tiaj tiaj nrog cov kev xav tau sib txawv tuaj yeem tau txais:
Flattening txheej txheem: Use a multi-roll flattening machine, adjust the roll pressure and roll gap according to the thickness of the coil: for coils with a thickness of ≤3mm, use a smaller roll gap and lower pressure, and for coils with a thickness of >3mm, nce qhov sib txawv ntawm qhov sib txawv thiab siab tsim nyog; rau coils nrog siab flatness yuav tsum, temper pass processing yuav muab ntxiv tom qab flattening, uas yuav ntxiv txhim kho flatness thiab nto smoothness.
Nto tiv thaiv thaum flattening: Siv huv, tsis yog -abrasive flattening rolls kom tsis txhob khawb ntawm cov hlau kauj; Yog hais tias lub patina nto yog puas lawm, tus kheej - kho mechanism ntawm cov hlau yuav kho qhov chaw puas, thiab corrosion kuj yuav tsis cuam tshuam.
Tshaj tawm - ua kom muaj kev ua tau zoo: Tom qab flattening, qhov seem ntawm cov ntawv hlau yuav txo qis, thiab cov khoom siv kho tshuab (yield zog ntau dua lossis sib npaug ntawm 345 MPa, tensile zog 485-655 MPa) thiab huab cua kev ua haujlwm yuav nyob twj ywm tsis hloov, uas tuaj yeem ua tau raws li cov kev xav tau ntawm kev ua haujlwm tom ntej thiab siv.
● Cov Lus Cim Tseem Ceeb rau Kev Ua Haujlwm
Nws raug nquahu kom xaiv cov chaw tsim khoom lag luam uas muaj kev paub dhau los ntawm kev tuav cov huab cua huab cua, vim tias lawv yuav siv cov cuab yeej tshwj xeeb thiab cov txheej txheem kom tsis txhob muaj kev puas tsuaj ntawm ntug thiab ntug tsis xws luag.
Yog hais tias lub slit steel strips los yog flattened steel nplooj ntawv yuav tsum tau khaws cia rau ib ntev lub sij hawm, lawv yuav tsum tau muab tso rau hauv ib tug qhuav, ventilated ib puag ncig, thiab tsis txhob sib cuag nrog corrosive media, uas yuav cuam tshuam rau cov tsim ntawm patina.
For ASTM A606-4 coils with a thickness of >6 hli, nws yog ib qho tsim nyog yuav tsum tau ua kom lub preheating kub kom tsim nyog thaum lub sij hawm slitting thiab flattening, uas yuav ua tau ntxiv txhim kho cov ductility ntawm cov hlau thiab txo cov kev pheej hmoo ntawm kev ua tsis xws luag.
