1. Dab tsi yog thawj daim ntawv thov ntawm ASTM SA210 steel kav?
ASTM SA210 yog tus qauv tshwj xeeb rau seamless carbon-manganese steel boiler thiab superheater tubes, feem ntau tsim rausiab - kub thiab siab - kev pabcuam siabhauv kev tsim hluav taws xob (coal- raug rho tawm haujlwm, roj- raug rho tawm haujlwm boilers), muaj boilers, thiab tshav kub exchangers. Lawv tau dav siv los thauj cov chav dej, dej kub, lossis lwm yam dej kub siab - vim lawv qhov kev nkag tau zoo heev thiab thermal conductivity.
2. Cov qhab nia tseem ceeb hauv qab ASTM SA210 yog dab tsi, thiab lawv txawv li cas?
Cov qib tseem ceeb suav nrogSA 210 gr. A-1, SA 210 Gr. C, thiab SA210 Gr. B(qhov feem ntau siv). Qhov sib txawv yog nyob rau hauv tshuaj muaj pes tsawg leeg thiab mechanical zog:
SA 210 gr. A-1: Tsawg carbon cov ntsiab lus (max 0.27%), haum rau nruab nrab kub (txog ~ 510 degree).
SA 210 gr. B: Balanced carbon-manganese piv (C: 0.13-0.20%, Mn: 0.45-0.65%), zoo tagnrho rau kev pabcuam kub kub (txog ~ 593 degree) nrog lub zog zoo dua Gr. A-1.
SA 210 gr. C: Cov pa roj carbon ntau thiab manganese (C: 0.28-0.33%, Mn: 0.70-0.90%), muab lub zog tensile siab tshaj plaws thiab nkag siab tsis kam rau huab cua kub (txog ~ 649 degree).
3. Dab tsi yog qhov kev qhia tshwj xeeb (sab nraud txoj kab uas hla, phab ntsa thickness) ntawm ASTM SA210 kav?
ASTM SA210 cov kav dej feem ntau muaj nyob hauv:
Sab nraud txoj kab uas hla (OD): 12.7 hli (0.5 nti) rau 168.3 hli (6.625 nti) rau qhov ntau thiab tsawg.
Phab ntsa Thickness (WT): 1.24 mm txog 12.7 mm, tom qab ASME B36.10M (carbon steel kav) lossis B36.19M (stainless steel kav) rau qhov ntev ntev.
Ntev: Feem ntau 6-12 meters (ib leeg random ntev) los yog kho raws li tus neeg yuav tsum tau ua.
4. Yam khoom siv dab tsi uas yuav tsum tau muaj rau ASTM SA210 kav?
Raws li ASTM A210 (qhov sib npaug ntawm pej xeem; SA210 yog ASME boiler & siab hlab ntsha code version), cov cuab yeej tseem ceeb muaj xws li:
Tensile zog: 415-585 MPa (Gr. B), 485-655 MPa (Gr. C).
Yield zog: Min 220 MPa (Gr. B), Min 275 MPa (Gr. C).
Elongation: Min 30% (Gr. B / C) hauv 50 hli ntsuas qhov ntev.
Impact Toughness: Charpy V- ntsuas ntsuas ntawm 0 degree, min 27 J (rau Gr. B/C hauv cov ntawv thov tseem ceeb).
5. Kev kho cua sov dab tsi yuav tsum tau ua rau ASTM SA210 kav?
ASTM SA210 cov kav dej yuav tsum tau uanormalization thiab tempering (N&T)los yogtag nrho annealinglos xyuas kom meej cov microstructure thiab mechanical zog:
Normalization: Thaum tshav kub kub rau 890-940 degree, tuav lub sij hawm txaus, ces cua txias.
Tempering: Reheat rau 595-705 degree, tuav, ces txias (rau Gr. C los yog tuab-walled kav Loj dua los yog sib npaug rau 12.7 mm).
Annealing: Thaum tshav kub kub rau 815-870 degree, txias maj mam (rau cov kav dej yuav tsum tau qis hardness rau machining).
