Cov kav hlau tau muab faib ua seamless steel kav thiab welded steel kav. Cov txheej txheem ntawm cov yeeb nkab seamless steel yog xov ib qho khoom siv los yog ingot mus rau hauv lub hollow capillary raj, uas yog ces dov mus rau hauv cov yeeb nkab ntawm qhov yuav tsum tau muaj. Cov kev sib txawv ntawm kev tho thiab dov siv los ua cov txheej txheem sib txawv ntawm kev tsim cov kav dej seamless. Cov txheej txheem ntawm welded steel yeeb nkab yog khoov lub raj dawb paug (steel phaj los yog sawb) rau hauv ib tug tubular zoo, thiab ces welded qhov sib txawv los ua ib tug steel yeeb nkab. Vim qhov sib txawv ntawm kev sib sau thiab vuam txoj kev siv, ntau txoj kev tsim cov welded steel kav yog tsim.
Seamless steel kav yog tsim los ntawm kub dov. Txoj kev extrusion feem ntau yog siv los tsim cov khoom siv nyuaj-rau-pierce tsawg-yas high-alloy steel kav lossis cov kav hlau tshwj xeeb zoo li cov kav dej thiab cov kav hlau sib xyaw. Txias dov thiab txias txoj kev kos duab tuaj yeem txuas ntxiv ua cov kav dej kub dov rau hauv cov kab me me thiab cov kav dej nyias nyias. Welded steel yeeb nkab muaj cov txheej txheem yooj yim, kev ua haujlwm siab ntau lawm, tus nqi qis, thiab cov khoom lag luam tau nthuav dav txhua hnub.
