1. Refines Grain Structure thiab txhim kho Toughness
Tsis kho qhov pib: Kub-rolled los yog txias-rolled SPA-H tej zaum yuav muaj ntxhib, tsis sib xws nplej los yog elongated grain qauv (los ntawm dov) uas txo toughness.
normalizing nyhuv: Hloov cov non-cov qauv microstructure mus rau hauv nplua, equiaxed ferrite-pearlite nplej, uas ua rau muaj txiaj ntsig zoocuam tshuam toughness(Charpy V-notch toughness nce 30–50%, feem ntau ntawm 40–50 J rau 60–75 J ntawm chav tsev kub).
Tswv yim nqi: Ua rau SPA-H tiv taus ntau dua rau cov pob txha tawg, qhov tseem ceeb rau cov khoom siv hauv tsev (xws li, choj railings, cov kab txhawb nqa) raug rau cov khoom hnyav lossis qhov kub thiab txias.
2. Sib npaug zog thiab Ductility
Ntawm -rolled SPA-H: me ntsis txo cov khoom muaj zog (los ntawm 5-10%, los ntawm ~ 345 MPa rau ~ 310-325 MPa) thiab tensile zog (los ntawm 3-5%, los ntawm ~ 480 MPa rau ~ 460-470 MPa), tab sis nceelongation ntawm tawglos ntawm 8-12% (los ntawm Ntau dua lossis sib npaug rau 20% rau Ntau dua lossis sib npaug rau 22-24%).
Nyob rau hauv txias -rolled SPA-H: Rov qab ib feem ntawm kev ua hauj lwm hardening-lowers yield zog (los ntawm ~ 415–450 MPa rau ~ 360–380 MPa) thiab hardness (los ntawm ~ 210–270 HBW rau ~ 190–230 HBW), thaum rov kho elongation los ntawm tsawg dua los yog sib npaug li 15%18–20%.
Cov txiaj ntsig tseem ceeb: Tsim kom muaj lub zog sib npaug ntau dua - ductility piv, ua rau cov hlau yooj yim rau kev tsim (piv txwv li, khoov, vuam) yam tsis muaj kev cuam tshuam cov qauv kev ntseeg siab.
3. Tshem tawm cov kev ntxhov siab uas seem
Qhov teeb meem tsis kho: Rolling, welding, los yog txias forming qhia txog kev ntxhov siab nyob hauv SPA-H, uas tuaj yeem ua rau warping, cracking, los yog dimension tsis ruaj khov thaum lub sij hawm.
normalizing nyhuv: Kho siab80-90% ntawm residual stresseslos ntawm kev tso cai rau cov hlau sib cog lus sib npaug thaum lub sij hawm cua txias, tiv thaiv ntev - lub sij hawm deformation nyob rau hauv precision daim ntaub ntawv (xws li, architectural cladding, kos npe rau panels).
4. Txhim kho Uniformity ntawm Mechanical Properties
Tsis kho qhov teeb meem: Thicker SPA-H daim hlau los yog cov khoom siv welded feem ntau muaj cov khoom tsis sib xws thoob plaws ntawm tus ntoo khaub lig- ntu (xws li, cov cua sov hnyav dua- cov cheeb tsam cuam tshuam hauv cov welds, cov cheeb tsam softer hauv cov phaj tuab).
normalizing nyhuv: Ua kom muaj kev sib haum xeeb thiab kev ua kom txias, yog li cov khoom zoo li lub zog, hardness, thiab ductility zoo ib yam thoob plaws hauv cov hlau - tseem ceeb rau cov qauv loj uas yuav tsum tau ua kom muaj kev ua tau zoo.
5. Tsis muaj kev cuam tshuam tsis zoo rau Corrosion Resistance
Normalizing tsuas yog hloov cov hlau lub microstructure, tsis yog nws cov tshuaj muaj pes tsawg leeg (Cu, Cr, P tseem tsis hloov). Thus, SPA-H retains its full ability to form a dense, protective patina, with no reduction in weathering performance.
