1. S275JR steel yeeb nkab yog dab tsi, thiab nws lub npe txhais li cas?
Teb: S275JR yog ib qho uas tsis yog - alloy structural steel yeeb nkab tau teev nyob rau hauv European tus qauv EN 10025-2. Lub npe lov raws li:
"S"=Cov qauv hlau (rau kev thauj khoom-cov ntaub ntawv kabmob);
"275"=Yam tsawg yield zog ntawm 275 MPa (ntawm 16mm thickness);
"JR"=Joule-Rated impact test (27J yam tsawg kawg nkaus ntawm 20 degree, qhia zoo toughness rau kev siv cov qauv siv).
2. Cov txheej txheem thoob ntiaj teb twg tswj hwm S275JR steel kav?
Teb: Tus qauv tseem ceeb yogTS EN 10025-2(Tebchaws Europe tus qauv rau cov uas tsis yog- alloy structural steels), uas txhais cov tshuaj muaj pes tsawg leeg, txhua yam khoom, thiab cov kev xav tau zoo. Rau kev tsim cov yeeb nkab, nws feem ntau ua ke nrogTS EN 10210-1(kub- tiav seamless structural steel raj) los yogTS EN 10219-1(txias-ua welded structural hollow seem), nyob ntawm txoj kev tsim khoom (seamless vs. welded).
3. Dab tsi yog cov tshuaj muaj pes tsawg leeg ntawm S275JR steel?
Teb: S275JR muaj cov tshuaj txwv nruj kom ntseeg tau tias kev ua haujlwm:
Cov pa roj carbon (C): Tsawg dua lossis sib npaug li 0.21% (tiv thaiv brittleness thiab ua kom cov weldability);
Manganese (Mn): Tsawg dua lossis sib npaug li 1.50%;
Silicon (Si): Tsawg dua lossis sib npaug li 0.55%;
Phosphorus (P): Tsawg dua lossis sib npaug li 0.035%;
Sulfur (S): Tsawg dua lossis sib npaug li 0.035%;
Copper (Cu): Tsawg dua lossis sib npaug li 0.55% (yeem, rau corrosion kuj nyob rau hauv ib puag ncig me me).
4. Cov khoom siv dab tsi ua rau S275JR haum rau kev siv cov qauv?
TebCov yam ntxwv tseem ceeb (raws li EN 10025-2):
Yield zog (ReH): 275 MPa (rau thickness Tsawg dua los yog sib npaug rau 16 hli; txo me ntsis nrog cov seem tuab);
Tensile zog (Rm): 370-530 MPa;
Elongation (A): Ntau dua lossis sib npaug li 21% (kom paub meej ductility rau kev sib sau / khoov);
Kev cuam tshuam lub zog (KV): Ntau dua lossis sib npaug ntawm 27J ntawm 20℃(tiv thaiv pob txha tawg hauv ib puag ncig).
5. Dab tsi yog cov kev siv feem ntau ntawm S275JR steel kav?
Teb: Vim nws lub zog sib npaug, weldability, thiab tus nqi -effectiveness, S275JR kav yog siv dav hauv:
Kev tsim kho (steel thav duab, scaffolding, txhawb kab, dej / roj kav);
Mechanical engineering (tshuab thav duab, conveyor systems, structural Cheebtsam);
Infrastructure (bridges, tunnels, culverts, ntws systems);
Roj & roj (tsawg- cov kav dej siab, cov txheej txheem sab nrauv);
Agricultural machinery thiab general fabrication.
