Nws yuav zoo li pom tseeb tias kev paub siv yuav pab kom tsis txhob siv nyiaj ntau tshaj qhov tsim nyog ntawm cov khoom siv raw.Nws tseem tuaj yeem txuag sijhawm thiab nyiaj txiag ntawm kev ua haujlwm ntxiv.Hauv lwm lo lus, kev nkag siab qhov sib txawv ntawm qhov kub thiab txias dov hlau yuav pab cov tsim qauv thiab cov kws tsim qauv ua tiav cov txiaj ntsig zoo dua—thiab ntawm tus nqi zoo tshaj plaws tau.

Qhov sib txawv ntawm ob hom hlau no yog ib qho ntawm cov txheej txheem.Raws li koj tuaj yeem xav,“kub dov”hais txog kev ua tiav nrog cua sov.“Txias dov”hais txog cov txheej txheem ua tiav ntawm lossis ze ntawm chav tsev kub.Txawm hais tias cov txheej txheem no cuam tshuam rau tag nrho cov kev ua tau zoo thiab daim ntawv thov, lawv yuav tsum tsis txhob totaub nrog cov kev qhia tshwj xeeb thiab qib ntawm cov hlau, uas yuav tsum tau ua nrog cov khoom siv hlau metallurgical thiab kev ntsuas kev ua tau zoo.Cov hlau ntawm cov qib sib txawv thiab cov lus qhia tshwj xeeb tuaj yeem yog kub dov lossis txias dov—nrog rau cov pa roj carbon thiab lwm yam hlau alloys.

Kub Rolled Steel

Kub dov hlau tau dov-nias ntawm qhov kub thiab txias (tshaj 1,700˚F), uas yog siab tshaj qhov rov ua kom rov ua dua tshiab rau cov hlau feem ntau.Qhov no ua rau cov hlau yooj yim rau kev tsim, thiab tseem ua rau cov khoom lag luam yooj yim dua rau kev ua haujlwm nrog.

Txhawm rau txheej txheem kub dov steel, manufacturers pib nrog ib tug loj, daim duab plaub.Lub billet tau rhuab thiab xa mus rau pre-ua, qhov twg nws yog flattened rau hauv ib tug loj yob.Los ntawm qhov ntawd, nws tau khaws cia ntawm qhov kub thiab txias, thiab lub ci dawb-kub hlau yog khiav los ntawm cov txheej txheem compression rollers kom ua tiav nws qhov ntev.Rau cov ntawv hlau, cov chaw tsim khoom tig cov hlau dov rau hauv coils thiab cia nws txias.Rau lwm cov ntaub ntawv, xws li tuav thiab daim hlau, cov ntaub ntawv raug muab faib thiab ntim.

Steel shrinks me ntsis raws li nws txias.Vim tias kub dov steel yog txias tom qab ua tiav, muaj kev tswj tsawg dua nws cov duab kawg, ua rau nws tsis haum rau kev siv precision.Kub dov hlau feem ntau yog siv thaum lub sijhawm tshwj xeeb qhov ntev't qhov tseem ceeb—Piv txwv li, nyob rau hauv railroad lem thiab kev tsim kho tej yaam num.

Kub dov hlau feem ntau tuaj yeem txheeb xyuas los ntawm cov yam ntxwv hauv qab no:

•Scaled nto, cov seem ntawm txias los ntawm huab cua kub.

•Cov npoo me ntsis sib npaug thiab cov ces kaum rau cov khoom lag luam bar thiab phaj (vim shrinkage thiab tsis muaj meej meej).

•me ntsis distortions, qhov uas txias yuav tawm me ntsis trapezoidal cov ntaub ntawv es tsis zoo kawg nkaus squared ces kaum.

Kub dov hlau feem ntau yuav tsum tau ua tsawg dua li cov hlau txias, uas ua rau nws kim heev.Kub dov hlau kuj tso cai rau txias ntawm chav tsev kub, yog li nws's yeej tseem ceeb normalized, lub ntsiab lus nws's dawb los ntawm kev ntxhov siab sab hauv uas tuaj yeem tshwm sim thaum lub sij hawm quenching los yog ua hauj lwm-hardening txheej txheem.

Kub dov hlau yog qhov zoo tshaj plaws nyob qhov twg qhov ntev kam rau ua't yog ib qho tseem ceeb raws li tag nrho cov khoom siv zog, thiab qhov chaw qhov chaw tiav'qhov tseem ceeb txhawj xeeb.Yog tias qhov chaw ua tiav yog ib qho kev txhawj xeeb, kev ntsuas tuaj yeem raug tshem tawm los ntawm kev sib tsoo, xuab zeb blasting, lossis acid-bath pickling.Thaum scaling raug tshem tawm, ntau yam txhuam los yog daim iav tiav tuaj yeem siv tau.Descaled steel kuj muaj qhov zoo dua rau kev pleev xim thiab lwm yam txheej txheej.

Txias Rolled Steel

Cold dov hlau yog qhov tseem ceeb kub dov hlau uas tau dhau los ntawm kev ua ntau dua.Txhawm rau kom tau txais cov hlau txias, cov tuam txhab feem ntau siv txias-kub kub dov hlau thiab yob nws ntau kom tau txais qhov tseeb ntau qhov ntev thiab zoo dua qhov zoo.

Tab sis lub sij hawm“dov”feem ntau yog siv los piav txog ntau yam txheej txheem tiav xws li tig, sib tsoo, thiab polishing, txhua tus uas hloov kho cov khoom kub uas twb muaj lawm rau hauv cov khoom ua kom zoo dua qub.Technically,“txias dov”tsuas yog siv rau cov nplooj ntawv uas raug compression ntawm rollers.Tab sis cov ntaub ntawv zoo li tuav los yog raj yog“kos,”tsis dov.Yog li kub dov thiab cov raj, ib zaug txias, raug ua tiav rau hauv qhov hu ua“txias tiav”tubs thiab bars.

Cold rolled steel feem ntau tuaj yeem txheeb xyuas los ntawm cov yam ntxwv hauv qab no:

•Ntau qhov chaw tiav nrog kev ua siab ntev dua.

•Cov npoo du uas feem ntau oily rau qhov kov.

•Cov tuav muaj tseeb thiab square, thiab feem ntau muaj cov npoo thiab cov ces kaum zoo.

•Tubes muaj zoo concentric uniformity thiab ncaj.

Nrog cov yam ntxwv zoo dua qub dua li kub dov steel, nws's tsis muaj surprise tias txias dov hlau feem ntau yog siv rau ntau technically meej daim ntaub ntawv los yog qhov twg aesthetics tseem ceeb.Tab sis, vim yog cov txheej txheem ntxiv rau cov khoom txias tiav, lawv tuaj ntawm tus nqi siab dua.

Hais txog lawv cov yam ntxwv ntawm lub cev, kev kho mob ua haujlwm txias tuaj yeem tsim kev ntxhov siab sab hauv hauv cov khoom siv.Hauv lwm lo lus, fabricating txias ua haujlwm steel—txawm yog txiav, sib tsoo, los yog vuam nws—tuaj yeem tso cov kev ntxhov siab thiab ua rau muaj kev sib cav tsis txaus ntseeg.

Nyob ntawm koj li cas'rov nrhiav los tsim, ntau hom ntaub ntawv txhua tus muaj lawv tus kheej cov txiaj ntsig thiab qhov tsis zoo.Rau cov haujlwm tshwj xeeb lossis kev tsim tawm ib zaug, cov ntaub ntawv steel prefabricated tuaj yeem muab lub tsev thaiv rau txhua qhov kev teeb tsa kev xav tau.

Rau tej yaam num uas koj yuav raug tsim ntau units, casting yog lwm txoj kev uas yuav txuag sij hawm nyob rau hauv machining thiab sib dhos.Casting qhov chaw tuaj yeem ua rau yuav luag txhua daim ntawv hauv ntau yam khoom siv zoo.