Submerged arc welding ( SAW ) yog ib qho kev siv ntau txoj hlua welding .
Tus thawj patent nyob rau hauv cov txheej txheem uas tau siv ua ke (SAW) raug coj tawm hauv xyoo 1935 thiab tau them ib qho hluav taws xob hauv qab lub txaj ntawm cov dej uas muaj zog. Keeb kwm tsim thiab patented Jones, Kennedy thiab Rothermund, tus txheej txheem yuav tsum tau muaj cov khoom noj khoom haus tsis tu ncua los yog tubular (hlau cored) electrode. Cov hlau ntim thiab qhov chaw tua kab yog kev tiv thaiv los ntawm cov kab mob "atrospheric contamination" los ntawm "pais" hauv qab daim pam ntawm cov kua fusion uas muaj cov kua qaub , kua qaub , manganese oxide, calcium fluoride , thiab lwm cov tshuaj.
Thaum cov hmoov txhaws taus, cov dej ua kom muaj zog, thiab muab txoj kab nruab nrab ntawm cov electrode thiab kev ua haujlwm. Qhov txheej tuab ntawm cov kua nplaum no yog npog cov hlau uas tiv thaiv kom tawg thiab cuam tshuam, thiab ua kom lub siab khaus ultraviolet hluav taws xob thiab cov pa taws uas yog ib feem ntawm cov hlau thaiv cov hlua hlau ( welding ) cov khoob hauv hlau.
