Paub meej kev kho mob ntawm tuab-walled seamless carbon steel yeeb nkab ua
Hauv kev ua cov kav dej tuab-walled seamless steel kav, ntau cov kauj ruam yuav tsum tau txais cov kav dej zoo li no. Los ntawm kev tshem tawm kev ua hauj lwm hardening ntawm seamless tubing, ib tug txaus siab metallographic qauv yuav tau. Cov txheej txheem cov cuab yeej yog lub ci ntsa iab annealing rauv, uas yog siv rau. Cov hlau tsis huv tiav yog cov cua sov kho hauv qhov chaw tiv thaiv. Thaum daim ntawv thov kev ua tau zoo ntawm cov yeeb nkab tuab-walled seamless steel yeeb nkab sib txawv, cov kev xav tau rau cov qauv metallographic tom qab ci annealing kuj txawv, yog li cov txheej txheem kev kho cua sov yuav txawv.
Qhov seem kev ntxhov siab ntawm cov tuab-walled seamless steel yeeb nkab cov khoom tseem nyob tom qab ua haujlwm txias, thiab cov kev ntxhov siab seem yog qhov tsis zoo rau kev ntxhov siab corrosion ntawm cov yeeb nkab. Txhua qib ntawm kev ua haujlwm txias tuaj yeem txhim kho cov khoom siv tiv thaiv kev ntxhov siab corrosion cracking. Lub℃ntawm kev ua haujlwm txias kuj tuaj yeem cuam tshuam qhov kub siab lub zog ntawm austenitic stainless hlau. Feem ntau hais lus, qhov siab dua qhov ua haujlwm kub lossis siab dua qhov kev xav tau ntawm lub neej tawg, qhov qis qis ntawm kev ua haujlwm txias.
Nws tuaj yeem pom los ntawm cov lus qhia saum toj no tias cov txheej txheem kev kho cua sov ntawm cov kav dej tuab-walled seamless steel kav yog teeb meem heev. Yuav kom tau txais cov qauv tsim nyog metallographic, cov cuab yeej hloov kho ib feem ntawm qhov cua txias ntawm lub qhov cub ci ntsa iab yuav tsum loj heev. Yog li ntawd, tam sim no lub siab tshaj plaws ci annealing rauv feem ntau txais yuav muaj zog convection txias nyob rau hauv nws cov cua txias seem, thiab muaj peb seem cua txias, thiab huab cua ntim tuaj yeem hloov kho nws tus kheej. Nws muab faib ua peb ntu raws qhov dav ntawm lub sawb.
Raws li txoj kev tsim khoom, cov kav dej tuab-walled seamless steel kav tuaj yeem muab faib ua peb pawg: kub dov (extrusion), vuam thiab ua haujlwm txias. Kub dov seamless steel yeeb nkab yog cov yeeb nkab steel uas cov khoom siv los yog cov khoom siv tau xuas nrig ntaus thiab dov rau hauv ib qho hollow seem. Cov txheej txheem yooj yim yog drilling thiab dov. Cold-worked seamless steel yeeb nkab yog kev ua haujlwm thib ob ntawm cov yeeb nkab steel (tseem suav nrog kev ua haujlwm thib ob ntawm cov yeeb nkab tuab-walled seamless steel yeeb nkab thiab nyias-walled seamless steel yeeb nkab). Kev ua haujlwm txias yog ib txoj hauv kev tseem ceeb kom tau txais cov kav dej ua tau zoo thiab kev ua haujlwm siab, nrog rau kev ua kom txias txias, kos duab txias, kos duab txias thiab txias spinning, thiab lwm yam. Extruded non-ferrous hlau seamless kav rau high alloy steel qib yog tsuas yog extruded.
