Nyob rau hauv cov mob khaub thuas ib tug tsawg-carbon steel welding, qhov txias npaum li cas ntawm cov welded sib koom ua ke, uas tau ua rau cracking nyiam nce, tshwj xeeb tshaj yog nyob rau hauv thawj weld Hnyav cov qauv raug cuam tshuam rau cracking, nws yog tsim nyog los ua raws li cov txheej txheem nram qab no:

1) Tsis tuaj yeem ua tau nyob rau hauv cov xwm txheej ntawm qhov kub thiab txias, kho thiab sib dhos weldments.

2) Preheat, 16Mn seamless steel yeeb nkab vuam txheej txheem nruj me ntsis tswj interlayer kub yuav tsum tsis txhob poob qis dua qhov kub ntawm preheating.

3) Hydrogen lossis ultra-low hydrogen vuam.

4) Tag nrho cov seam nruam vuam yuav tsum ua kom tiav kom tsis txhob cuam tshuam.

5) Thaum muab qhov chaw vuam los ua kom cov vuam tam sim no, vuam ceev qeeb, vim qhov nce tack welds cross-sectional cheeb tsam thiab ntev, preheated yog tias tsim nyog.

6) Tsis txhob ua rau ntawm lub hauv paus khoom arc zawj qhov chaw uas tsis yog qhov yuav tsum tau ua kom tiav cov crater thaum extinction.