Tshaj tawm - cua sov cov txheej txheem E7018

Ces Hlau Hlau Txuas thiab Preheating / Post - cov txheej txheem cua sov

Liaj Hlau Txav
E7018 cov hluav taws xob feem ntau siv rau kev siv vuamTsawg -} allloy high-} lub zog steels(piv txwv li, Q345, Q390, ASTM A572 GR.50), raws li lawv weld zog (ntau dua lossis sib npaug) phim cov ntaub ntawv no.

Tsis pom zoo rau nyias tsawg tsawg -} cov hlau carbon hlau (tuab <3mm): Kev pheej hmoo ntawm hlawv cov teeb meem tam sim no. E6013 (acidic electrodes) yog qhov tsim nyog rau nyias tsawg- cov hlau.

Thaum vuam siab dua - lub zog steels (piv txwv li, Q460 yog Weld lub zog ua tau raws kev tsim qauv; Ua cov txheej txheem kev sib txuas lus Welification cov ntaub ntawv tsim nyog (PQR) yog tias tsim nyog.

Yuav Tsum Tau Ua Ntej
Preheating yog qhov tseem ceeb rau kev tiv thaiv cov kab nrib pleb. Txheeb xyuas qhov kub ua kom sov raws li hauv paus pib tuab, cov roj carbon sib npaug (CE), thiab qhov kub thiab txias:

Rau hauv paus hlau thickness> 12mm, ambient kub <0 degree, lossis CE> (15%, Preheating kub tau pom zoo ntawm 80 ~ 150 degree.

Kom tuab daim hlau (> 25mm) lossis siab - Constrain conferures), nce preheating rau 150 ~ 200 degree.

Preheat uniformly (siv nplaim taws lossis hluav taws xob cua sov) kom ntseeg tau tias yog qhov zawj thiab 100 hli ntawm ob tog ncav cuag lub hom phiaj kub, xyuas kom pom tseeb nrog tus pas ntsuas kub.

Tshaj tawm - cua sov thiab hydrogen nyem
Rau cov qauv nyob rau hauv cov khoom siv tsis sib xws, tsawg - tej kev mob kub, lossis cov ntsiab lus siab, post} Weld Hydrogen nyem yog yuav tsum tau:

Txheej Txheem: Tshav kub txog 250 ~ 350 degree, tuav rau 1 ~ 2 teev (nce tuav sijhawm los ntawm 1 hli thickness), ces txias maj mam mus rau chav tsev kub.

Lub Hom Phiaj: Ua kom nrawm hydrogen diffusion los ntawm weld thiab tshav kub {{}} hydrogen condodes tab sis tseem ceeb nyob rau hauv cov kev txwv siab).

Cim npe nrov: Post -} Cov txheej txheem cua sov txheej txheem E7018, Tuam Tshoj, Chaw Tsim Tshuaj, Chaw Tsim Tshuaj, Txo, Cov Khoom Siv Nyiaj Txiag, Khoom Siv