Qhov sib txawv loj heev tuaj yeem ua rau txo qis qhov sib thooj, tsis txaus eddy tam sim no kub, tsis zoo intergranular bonding ntawm weld seam, thiab thaum kawg ua rau tsis tiav fusion lossis tawg.
Qhov sib txawv me me heev, ntawm qhov tod tes, tuaj yeem ua rau muaj kev sib thooj ntau ntxiv, kev siv vuam ntau dhau, ua rau kub hnyiab-los ntawm qhov vuam seam; los yog tsim ntawm qhov sib sib zog nqus pits tom qab extrusion thiab dov, cuam tshuam rau qhov zoo ntawm qhov vuam seam.
Tom qab cua sov ob lub npoo ntawm lub raj dawb paug mus rau qhov kub thiab txias, nyob rau hauv lub compression ntawm nyem yob, hom hlau nplej interpenetrate thiab crystallize, thaum kawg tsim cov khoom weld seam. Yog hais tias lub zog extrusion thaum lub sij hawm muab kauv hlau raj vuam me me dhau lawm, tus naj npawb ntawm cov khoom siv lead ua yuav raug txwv, txo cov hlau lub zog ntawm vuam seam thiab muaj peev xwm ua rau tawg hauv kev ntxhov siab. Hloov pauv, lub zog extrusion ntau dhau tuaj yeem nyem tawm cov hlau molten los ntawm lub vuam seam, tsis tsuas yog ua rau lub zog weld tsis muaj zog, tab sis kuj tseem ua rau muaj ntau cov burrs sab hauv thiab sab nraud, thiab tseem ua rau muaj qhov tsis xws luag xws li sib tshooj seams.
Tsis tsuas yog welding bias tsis tsim nyog, tab sis sab hauv thiab sab nraud weld seams yuav tsum tau khaws cia ntawm 1-3mm. Lub kaum sab xis ntawm lub kauv raj weld seam feem ntau yog 50-75 degrees, ua rau muaj kev ntxhov siab ua ke uas yog 60-85% ntawm tus thawj tswj hwm kev ntxhov siab hauv cov kav dej ncaj qha. Nyob rau hauv tib lub siab ua hauj lwm, phab ntsa thickness ntawm ib tug kauv yeeb nkab yog txo piv rau ib tug ncaj-welded yeeb nkab ntawm tib txoj kab uas hla.
Thaum lub sij hawm tsim cov txheej txheem ntawm kauv steel hlab, cov hlau phaj undergoes uniform deformation nrog tsawg residual kev nyuaj siab thiab tsis muaj nto khawb. Cov txheej txheem kauv steel raj muab kev yooj yim dua nyob rau hauv cov nqe lus ntawm txoj kab uas hla thiab phab ntsa thickness qhov ntev thiab specifications.
Kauv hlau raj tuaj yeem siv tau rau kev thauj mus los ua kua (dej thiab tso dej), kev thauj mus los ntawm cov pa roj (gas, chav, liquefied petroleum gas), thiab kev siv cov txheej txheem (pile pipes, beams, docks, roads, and piping for building structures).
