Kev siv steel phaj

Hlau phaj yog dav siv nyob rau hauv cov ntaub ntawv tseem ceeb nyob rau hauv ntau lub lag luam vim nws lub zog siab (piv txwv li, choj steel muaj lub zog tawm los tshaj 345 MPa), kev tiv thaiv corrosion (piv txwv li, shipbuilding steel muaj ntsev tsuag corrosion kuj lub neej ntawm ntau tshaj 20 xyoo), thiab machinability. Nyob rau hauv kev tsim kho, nws yog siv nyob rau hauv choj kab teeb (nrog ib tug load bearing peev xwm txog li 50 tons / m2) thiab siab -nce steel qauv thav duab (nrog rau seismic tsis kam ntawm magnitude 8), ho txhim kho lub tsev kev nyab xeeb thiab ncua peev xwm. Hauv kev tsim khoom siv tshuab, 45 # steel phaj (hardness HRC 18-22) yog siv rau hauv cov cuab yeej tshuab txaj kom paub meej thiab ruaj khov. Kev lag luam tsheb siv lub siab- lub zog steel phaj (lub zog tensile siab tshaj 590 MPa) kom ua tiav lub teeb yuag (qis dua 15%) thiab txhim kho kev nyab xeeb kev sib tsoo. Shipbuilding cia siab rau weathering steel phaj (xws li AH36 nkoj phaj) rau welded hulls, ua tau raws li corrosion kuj yuav tsum tau ntawm huab marine ib puag ncig. Nyob rau hauv lub zog sector, SPV490Q steel phaj (nrog -40℃qis-kub qhov toughness) yog siv nyob rau hauv cov roj cia tso tsheb hlau luam, thaum kis tau tus mob ntauwd steel qauv (Q345B cov khoom) txhawb kev ruaj ntseg ntawm daim phiaj fais fab.