Dab tsi yog cov khoom tseem ceeb ntawm SPCC daim ntawv?

Q: Dab tsi yog cov khoom tseem ceeb ntawm SPCC daim ntawv? Lub luag haujlwm ntawm txhua qhov khoom yog dab tsi?
A: Cov khoom tseem ceeb thiab lawv txoj haujlwm: ① Carbon (C Tsawg dua lossis sib npaug li 0.15%): Ua kom lub zog yooj yim; siab dhau ib cov ntsiab lus txo formability; ② Manganese (Mn Tsawg dua lossis sib npaug li 0.60%): Ua kom muaj zog thiab txhim kho dov zog; ③ Phosphorus (P Tsawg dua lossis sib npaug li 0.035%) thiab Sulfur (S Tsawg dua lossis sib npaug rau 0.035%): Kev puas tsuaj impurities, tswj cov qib qis los tiv thaiv embrittlement; ④ Hlau (Fe): Matrix tivthaiv, suav txog ntau dua 99%.
Q: Dab tsi yog cov txheej txheem rau kev tawm dag zog thiab lub zog tensile ntawm SPCC daim ntawv?
A: Raws li GB / T 11253: yield zog yog 230-300 MPa, thiab tensile zog yog 310-430 MPa. Cov txiaj ntsig tshwj xeeb hloov pauv me ntsis vim qhov tseeb ntawm dov (xws li thickness). Thinner gauges (tsawg dua los yog sib npaug li 1.0 mm) muaj zog dua me ntsis, thaum cov ntsuas tuab (Ntau dua lossis sib npaug li 3.0 mm) muaj zog me ntsis.
Q: Dab tsi yog qhov yuav tsum tau elongation rau SPCC daim ntawv? Qhov no cuam tshuam li cas rau kev ua haujlwm?
A: Tus qauv yuav tsum muaj qhov elongation ntawm Ntau dua lossis sib npaug li 28% (1.0-2.0mm thickness). Qhov siab dua qhov elongation, qhov tsawg dua nws yuav tawg thaum khoov thiab stamping. Yog xav tau kev kos duab sib sib zog nqus, SPCC qhov elongation tsis txaus, yog li SPCD / SPCE (elongation Ntau dua lossis sib npaug li 34%) yuav tsum tau siv.
Q: Dab tsi yog qhov nyuaj ntawm SPCC daim ntawv? Dab tsi hardness scale yog feem ntau siv los ntsuas nws?
A: Lub hardness ntau yam yog HV 80-110 (Vickers hardness) los yog HRB 60-80 (Brinell hardness). Vickers hardness (HV) feem ntau yog siv los kuaj. Vim tias daim ntawv saum npoo yog tawv thiab nyias tom qab txias dov, Vickers hardness yog qhov tsim nyog rau kev kuaj me me.
Q: How does SPCC sheet age? Does it harden over time? A: SPCC is a "non-aging steel". When stored at room temperature for 1-3 months, the strength and hardness change very little (≤5%). There is no need to worry about "aging hardening" causing cracking during processing. If long-term storage (>6 lub hlis) yuav tsum tau, nws raug pom zoo kom siv tshuaj tiv thaiv - xeb roj los tiv thaiv oxidation los ntawm kev cuam tshuam kev ua haujlwm.