Dab tsi yog daim ntawv thov tseem ceeb ntawm Q355 steel phaj?
A: Cov ntaub ntawv tseem ceeb hauv kev lag luam txawv teb chaws: kev siv tshuab (excavators, loaders, cranes), steel qauv vaj tse, txuas hniav, ntim, tsheb tsim, yees, cov hlab ntsha siab (tsis tshua muaj siab), thiab mining machinery.
Q355 qib twg yog qhov tsim nyog rau qhov qis - qhov kub thiab txias?
A: Q355D (-20 degree) thiab Q355E (-40 degree) yog tsim rau steel qauv thiab siv tshuab nyob rau hauv high-latitude cheeb tsam (xws li Europe, North America, thiab Russia).
Q355 steel phaj twg yuav tsum tau xaiv rau siv sab nraum zoov?
A: Xaiv Q355NH / ND weathering steel, uas muaj cov khoom xws li Cu, Cr, thiab Ni. Nws corrosion kuj yog 2-3 npaug ntawm Q355 zoo tib yam. Nws tsis tas yuav tsum tau pleev xim thiab tsim cov xeb-liab passivation txheej.
Q355 steel phaj puas tuaj yeem siv rau hauv cov qauv welded, thiab nws qhov kev sib txuas yog dab tsi? A: Nws muaj weldability zoo thiab belongs rau qeb ntawm yooj yim - mus rau -weld low- alloy steel. Nws tuaj yeem welded siv phau ntawv arc welding, submerged arc vuam, thiab roj shielded vuam yam tsis muaj preheating (preheating rau 80-}150℃yog pom zoo rau cov phaj tuab dua 50mm lossis rau qhov kub thiab txias).
Puas yog Q355 steel daim hlau thiab European txheem S355JR / J0 / J2 steel daim hlau sib hloov tau?
A: Q355B sib raug rau S355JR, Q355C sib raug rau S355J0, thiab Q355D sib raug rau S355J2. Lawv cov cuab yeej siv tshuab tseem ceeb yog tib yam, yog li lawv tuaj yeem hloov pauv tau. Hauv kev lag luam txawv teb chaws, European tus qauv tsim feem ntau siv raws li cov neeg siv khoom xav tau.