Cov txheej txheem tsim cov kav hlau welded square feem ntau suav nrog cov kauj ruam tseem ceeb hauv qab no, thiab cov txheej txheem tshwj xeeb tuaj yeem hloov kho nyob ntawm cov khoom siv tsim khoom thiab cov khoom tshwj xeeb:

1. Kev Npaj Khoom Siv Raw
Kev xaiv cov hlau: Siv cov hlau kub dov lossis txias dov ua cov khoom siv raw, thiab xaiv cov khoom siv hlau tsim nyog (xws li cov hlau carbon, cov hlau alloy, thiab lwm yam) raws li cov khoom qhia (xws li phab ntsa tuab, qhov loj me).
Kev Tshem Tawm thiab Kev Sib Npaug: Tshem tawm cov hlau uas tau muab dov los ntawm lub tshuab tshem tawm, thiab siv lub tshuab sib npaug kom tshem tawm cov duab nthwv dej lossis kev khoov ntawm cov hlau uas tau muab dov kom ntseeg tau tias qhov chaw tiaj tus.

2. Tsim
Ua ntej khoov thiab ua kom ntxhib: Cov hlau yuav maj mam khoov los ntawm ntau pawg ntawm cov menyuam kom ua ib daim duab plaub fab ua ntej. Feem ntau siv cov thev naus laus zis "khoov txias" los tsim kom tsis txhob muaj cov khoom tawv.
Kev tsim zoo: Siv cov pwm precision los kho cov duab kom ntseeg tau qhov tseeb ntawm cov yeeb nkab hlau square (xws li qhov ntev ntawm sab, ntsug).

3. Kev vuam
Kev vuam tsis kam zaus siab (ERW):
Ua kom cov npoo ntawm cov hlau uas tau tsim ua kom sib dhos thiab ua kom cov npoo ntawm cov hlau kub mus rau lub xeev molten los ntawm cov hluav taws xob siab.
Siv lub zog los txuas cov npoo kom ua ib qho kev sib txuas tas mus li.
Kev Vuam Arc Uas Muab Tso Rau Hauv Qab Av (SAW):
Siv tau rau cov kav hlau loj lossis cov kav hlau tuab, cov kua dej raug npog ntawm qhov vuam, thiab cov hlau vuam thiab cov khoom siv hauv paus raug yaj los ntawm lub arc los tsim ib qho vuam.

4. Kev Ua Vuam
Kev Tshem Tawm Cov Kab Ntsig: Siv lub tshuab txiav lossis lub log sib tsoo kom tshem tawm cov kab nrib pleb ntawm sab hauv thiab sab nraud ntawm qhov vuam kom ntseeg tau tias qhov chaw du.
Kev nrhiav qhov tsis zoo ntawm vuam: Siv ultrasound lossis X-ray los nrhiav qhov tsis zoo sab hauv ntawm qhov vuam (xws li qhov hws thiab tsis muaj kev sib xyaw).

5. Kev Loj thiab Kev Ncaj
Tshuab ntsuas qhov loj: Kho qhov tseeb ntawm cov yeeb nkab hlau los ntawm kev dov kom ntseeg tau tias qhov ntev ntawm sab thiab qhov puag ncig ua tau raws li cov qauv.
Tshuab ncaj: Tshem tawm qhov khoov deformation ntawm cov yeeb nkab hlau thaum lub sijhawm tsim lossis vuam.

6. Txias thiab Txiav
Kev Txias: Siv dej txias lossis cua txias kom txo qhov kub ntawm cov yeeb nkab hlau kom tsis txhob muaj kev hloov pauv thermal.
Kev Txiav: Siv lub tshuab txiav ya lossis lub tshuab txiav voj voog los txiav cov yeeb nkab hlau txuas ntxiv mus rau qhov ntev uas xav tau (xws li 6 meters, 12 meters).

7. Kev Kho Mob Nto
Pickling/phosphating: tshem tawm cov nplai oxide saum npoo thiab cov khoom tsis huv kom npaj rau kev kho mob tom ntej.
Galvanizing los yog pleev xim: txhim kho qhov tiv taus xeb ntawm cov kav hlau los ntawm kev kub-dip galvanizing lossis txau xim tiv thaiv xeb.

8. Kev Tshuaj Xyuas Zoo
Kev ntsuas qhov ntev: xyuas cov yam ntxwv xws li qhov ntev ntawm sab, tuab ntawm phab ntsa, qhov ntev, thiab lwm yam.
Kev ntsuam xyuas cov khoom siv kho tshuab: kev ntsuam xyuas tensile, kev ntsuam xyuas kev cuam tshuam, thiab lwm yam los xyuas kom meej tias cov khoom siv muaj zog thiab tawv.
Kev tshuaj xyuas qhov tsos: pom los yog los ntawm cov khoom siv tsis siv neeg los nrhiav cov qhov tsis zoo ntawm qhov chaw (xws li khawb, qhov ntswj).

9. Ntim Khoom thiab Khaws Cia
Kev Ntim Khoom: ntim ua ke, sau daim ntawv lo, lossis siv cov khoom siv uas tsis ntub dej rau kev ntim khoom raws li cov neeg siv khoom xav tau.
Kev Khaws Cia: khaws cia rau hauv pawg kom tsis txhob muaj kev hloov pauv lossis xeb los ntawm kev nyuaj siab lossis huab cua noo.