Cold-Formed Steel
Cold-formed steel yog hais txog ntau yam kev sib tshuam ntawm cov kab sib txuas ua los ntawm cov kub-kuav los yog txias-dov strip steel nyob rau hauv kev ua haujlwm siab ntawm chav tsev kub. Kuj hu ua nyias-walled steel, nws yog ib hom ntawm lub teeb lub tsev steel. Cold-formed steel tau tsim los rau ntau tshaj 100 xyoo, thiab nws yog thawj zaug tsim los ntawm ib lub tshuab nrog dabtsi yog khoov xovxwm. Xyoo 1910, Tebchaws Meskas tau tsim thawj qhov kev sib txuas ua ke ua ntej. Tom qab xyoo 1960, cov hlau txias tau tsim sai heev. Xyoo 1989, nws cov khoom lag luam thoob ntiaj teb tau nce mus txog 8 lab tons, nrog ntau dua 10,000 ntau yam thiab cov lus qhia tshwj xeeb. Cov txiaj ntsig ntawm cov hlau tsim txias hauv cov teb chaws tsim kho tau suav txog li 5% ntawm tag nrho cov khoom siv hlau. Tuam Tshoj tau tsim nws thawj chav tsev txias-tsim steel tsim nyob rau hauv Shanghai xyoo 1958. Thaum kawg ntawm lub xyoo 1980, muaj ntau tshaj 30 lub tsev tsim, ua tau ze li ntawm 100 ntau yam thiab ib xyoos ib zaug tso tawm ntau tshaj 200,000 tons ntawm txias-tsim steel.
Cold-formed steel yog ib hom kev lag luam hla ntu, lub teeb yuag nyias-walled steel, tseem hu ua steel tub yees steel lossis txias-tsim steel. Cold-formed steel yog cov khoom tseem ceeb rau kev ua lub teeb steel qauv. Nws muaj ntau yam ultra-nyias, tsim nyog thiab nyuaj hla ntu uas tsis tuaj yeem tsim los ntawm kub dov. Piv nrog kub-kuav los tiag steel, nyob rau hauv cov ntaub ntawv ntawm tib lub cross-sectional cheeb tsam, lub vojvoog ntawm gyration tuaj yeem nce los ntawm 50% mus rau 60%, thiab lub sijhawm ntawm inertia ntawm seem tuaj yeem nce los ntawm 0.5 mus rau 3.0 npaug, yog li cov khoom siv zog tuaj yeem siv tau ntau dua; (Qhov ntawd yog, cov qauv hlau ua los ntawm ib txwm I-beam, channel steel, lub kaum sab xis steel thiab steel phaj) tuaj yeem txuag tau li 30% mus rau 50% ntawm cov hlau. Qee zaum, tus nqi ntawm cov hlau siv hauv cov txheej txheem txias txias yog sib npaug rau cov khoom siv ntxiv dag zog raws li cov xwm txheej qub, uas yog cov khoom siv nyiaj txiag.
Cold-formed steel muaj ntau yam kev siv, thiab feem ntau yog siv los ua cov khoom siv thiab cov khoom siv hauv kev tsim khoom xws li kev tsim kho, tsheb ciav hlau, tsheb, thiab nkoj.
Muaj ntau hom txias-tsim steel, muab faib ua qhib, semi-kaw thiab kaw cov duab sib dhos. Cov khoom tseem ceeb yog txias-tsim channel steel, lub kaum sab xis steel, Z-shaped steel, txias-tsim corrugated steel phaj, square yeeb nkab, cov yeeb nkab square, hluav taws xob welded tshwj xeeb-zoo li tus steel yeeb nkab, dov lub qhov rooj tos. Cold-formed steel feem ntau tsim muaj lub thickness ntawm 6mm los yog tsawg dua thiab dav ntawm 500mm los yog tsawg dua. Feem ntau siv specifications nyob rau hauv peb lub teb chaws yog equilateral kaum steel (ntev ntev 25 ~ 75 hli), puab curling lub kaum sab xis steel (leg ntev 40 ~ 75 hli), channel steel (siab 25 ~ 250mm), puab curling channel steel (siab 60 ~ 250mm), curling Z-shaped steel (100 ~ 180mm siab) thiab ntau tshaj 400 specifications thiab ntau yam. Cov khoom siv dav siv hauv kev tsuas, kev tsim kho, kev ua liaj ua teb, kev thauj mus los, txuas hniav, petrochemical, lub teeb kev lag luam, hluav taws xob thiab lwm yam lag luam.
Cold-formed steel yog cov khoom tseem ceeb rau kev ua lub teeb steel qauv, thiab nws yog ua los ntawm txias-formed steel daim hlau los yog steel strips. Nws cov phab ntsa tuab tuaj yeem tsis tsuas yog ua kom nyias nyias, tab sis kuj ua kom yooj yim rau cov txheej txheem ntau lawm thiab txhim kho kev tsim khoom. Nws tuaj yeem tsim ntau yam profiles thiab txias-tsim steels ntawm cov khoom sib txawv nrog cov phab ntsa tuab, uas nyuaj rau tsim los ntawm cov txheej txheem kub dov, tab sis nrog cov duab sib luag. Ntxiv rau kev siv ntau lub tsev tsim, txias-tsim steel kuj yog siv dav hauv kev tsim tsheb thiab kev ua liaj ua teb machinery manufacturing. Muaj ntau ntau hom txias-tsim steel, uas tau muab faib ua qhib, ib nrab kaw thiab kaw raws li seem. Raws li cov duab, muaj txias-tsim channel steel, lub kaum sab xis steel, Z-shaped steel, square tube, rectangular raj, tshwj xeeb zoo li lub raj, dov lub qhov rooj, thiab lwm yam. yield zog faib ntawm cov khoom txias-tsim steel, ntxiv nplua-grained steel, thiab nce cov kev ntsuam xyuas tshwj xeeb rau cov khoom siv kho tshuab ntawm cov khoom.
