Weathering steel puas tuaj yeem welded?

Xaiv cov khoom tsim nyog yog qhov pib tseem ceeb rau kev tsim cov qauv hlau. Xaiv cov khoom tsim nyog tuaj yeem ua rau muaj txiaj ntsig zoo. Muaj ntau hom huab cua steels muaj nyob rau hauv sib txawv zog rau ntau yam kev siv. Weathering steels muab qhov zoo ntawm lub zog siab dua nrog kev tiv thaiv corrosion zoo dua. Txij li thaum nyob rau hauv feem ntau daim ntaub ntawv weathering steel tsis muaj ib tug anti-corrosion txheej, cov pa roj carbon hneev taw ntawm tag nrho cov qauv yog me dua coated steel daws. Rau cov ntawv thov nrog cov xim pleev xim, kev saib xyuas cov xim tsis tshua muaj, uas txuag nyiaj thiab tiv thaiv ib puag ncig.

Huab cua steel
Huab cua steel yog cov hlau tsis tshua muaj hlau nrog zoo heev atmospheric corrosion kuj. Atmospheric corrosion kuj yog raws li qhov tsim ntawm oxide txheej rau ntawm qhov chaw, uas tsim cov txheej txheem kaw, tsis muaj kev cuam tshuam ntawm cov hlau nto. Cov txheej oxide no hu ua patina. Lub sij hawm weathering steel feem ntau yog siv, qee zaum weathering steel thiab weathering steel kuj siv.
Lub patina txheej ntawm weathering hlau yog txawv nyob rau hauv cov qauv thiab muaj pes tsawg leeg los ntawm patina txheej ntawm zoo tib yam hlau. Ordinary patina txheej tsis muaj zog thiab tawg, thiab cov khoom tev tawm yooj yim. Lub patina txheej muaj cov ntsiab lus uas ua raws li kev sib raug zoo rau ib leeg thiab rau cov hlau nto. Qhov no ua rau muaj kev tiv thaiv txheej txheem uas tsis yooj yim tso cov khoom siv thiab tiv thaiv dej thiab oxygen nkag mus rau hauv cov hlau. Nyob rau hauv cov txheej txheem tiv thaiv patina, corrosion tsis nres kiag li, tab sis tus nqi ntawm corrosion yog qeeb qeeb, yog li cov hlau tuaj yeem siv rau sab nraum zoov yam tsis muaj txheej tiv thaiv.

Phosphorus-free weathering steels muaj kev cuam tshuam zoo heev thiab cov khoom siv vuam, uas yog vim li cas lawv tuaj yeem siv los ua cov qauv hlau hauv cov khoom siv thauj khoom. Cov hlau no muaj nyob rau hauv ntau lub zog sib txawv rau kev siv sib txawv, nrog cov txiaj ntsig ntawm lub zog ntawm 345 MPa txog 960 MPa.