Yuav Xaiv & Sib txawv li cas hauv Kev Xyaum A-514 Qib B, E, F, H, Q, thiab S?
Kev xaiv thiab sib txawv ntawm qib A514 yog qhov kev txiav txim siab engineering uas sib npaug ntawm cov qauv tsim, kev tsim muaj peev xwm, thiab tus nqi.
SA514 Qib F yog dab tsi?
SA514 Qib F yog siab -lub zog, quenched thiab tempered alloy steel phaj (ASTM A514 Qib F / ASME SA514 Qib F) paub txog nws lub zog zoo heev (min 100 ksi), toughness, thiab zoo weldability, siv nyob rau hauv hnyav structural daim ntaub ntawv xws li kev tsim kho cov cuab yeej, {6} thav duab hnyav, thiab - lub zog ntawm cov khoom siv, cov khoom siv cranes, thiab - hnyav npaum li cas. tseem ceeb heev. Nws ua tiav nws cov khoom los ntawm cov txheej txheem kho cua sov ntawm quenching thiab tempering thiab muaj cov ntsiab lus alloying xws li Nickel, Chromium, Molybdenum, thiab tooj liab rau kev ua tau zoo.
Ntawm no yog ib kauj ruam -los ntawm - cov lus qhia kauj ruam uatxog A514 Qibhauv kev xyaum.
Txheeb xyuas qhov xav tau Thickness:
< 2.5 in.: Grade B or F are suitable.
2.5 - 4 nyob rau hauv.: Qib F lossis E (yog tias corrosion yog qhov tseem ceeb).
>4 nyob rau hauv.: Qib H yog tsim tshwj xeeb rau qhov no.
Saib xyuas ib puag ncig:
Txheem sab hauv / coated: Qib F.
Tshaj tawm, nrhiav huab cua: Qib E.
Nrog rau Mill Test Report (MTR):
Qhov no yog cov ntaub ntawv tseeb. Koj yuav tsum sib piv qhov tseeb tshuaj ntsuam xyuas ntawm MTR tiv thaiv ASTM A514 lub rooj rau txhua qib. Qhov sib txawv ntawm Cr, Mo, Ni, thiab lub xub ntiag ntawm Boron yuav tam sim ntawd txheeb xyuas qib.
Nco ntsoov Universal Constant:
Txawm hais tias qib twg, tag nrho cov khoom siv A514 tus qauv (B, E, F, H) nyob rau hauv lub tempered mob yuav tsum tau raws li tib yam core mechanical zog:
Tawm Zog: Ntau dua lossis sib npaug rau 100 ksi (690 MPa)
Tensile zog: 110-130 ksi (760-895 MPa) feem ntau
Impact Toughness: Ntau dua lossis sib npaug li 40 ft -lb (54 J) ntawm -40℃F / -40 degree
Tswv yim Scenarios & Qib Xaiv txog A514 Qib
| Scenario | Pom zoo Qib | Kev xav |
|---|---|---|
| Excavator Boom (2.5" tuab) | A514 Qib F | Default xaiv. Zoo heev toughness thiab proven kev ua tau zoo nyob rau hauv dynamic loading. |
| Choj Bearing Phaj (1.5" tuab) | A514 Qib B | Tus nqi- zoo. Tsim nyog hardenability rau lub thickness no. |
| Unpainted Ntauwd Node (3 "tuab) | A514 Qib E | Txhim kho atmospheric corrosion kuj yog qhov tseem ceeb rau lub neej ntev. |
| Massive Press Frame (6" tuab) | A514 Qib H | Tsuas yog qib engineered los lav 100 ksi tawm los ntawm cov tub ntxhais ntawm cov ntu tuab. |
| Armor Cheebtsam xav tau machining ua ntej kawg HT | A514 Qib Q | Tso cai rau machining nyob rau hauv lub xeev quenched ua ntej zaum kawg tempering los ntawm tus fabricator. |
| Proprietary drilling tivthaiv xav tau 110 ksi tawm los | A514 Qib S | Rau cov khoom uas tsis yog -tus qauv siv tshuab. |
Txoj Cai zaum kawg rau kev sib txawv
Hauv kev xyaum, koj tsis "differentiate" tom qab kev yuav khoom- koj qhia kom raug txij thaum pib.
1.Xaiv raws li koj tus qauv tsim lub thickness, ib puag ncig, thiab kev npaj tsim khoom siv daim ntawv qhia ntws.
2.Specify qhov tseeb qib (piv txwv li, ASTM A514 Qib F) ntawm txhua daim duab kos thiab xaj xaj.
3.Ua pov thawj cov khoom xa tuaj siv Mill Test Report, lees paub chemistry sib tw qib xaiv cov kev cai ASTM.
Los ntawm kev ua raws li cov txheej txheem no, koj ua kom cov khoom muaj peev xwm tsim tau qhov yuav tsum tau muaj 100 ksi lub zog thoob plaws tag nrho cov tuab ntawm koj cov khoom, uas yog tag nrho lub hom phiaj ntawm A514 qib system.
1. Lub zog tawm ntawm SA514 Qib F yog dab tsi?
SA514 Qib F yog txhais los ntawm nws 100 ksi (690 MPa) yam tsawg kawg nkaus yield zog. Qhov no ua rau nws muaj tseeb "100 ksi steel," tso cai rau kev txo qhov hnyav ntawm cov qauv hauv qab kev ntxhov siab.
2. Daim ntawv thov thawj zaug ntawm SA514 Qib F yog dab tsi?
Cov hlau no feem ntau siv rau hauv cov mining thiab cov cuab yeej hnyav-xws li excavator booms, crane Cheebtsam, thiab cov qauv dragline- qhov twg muaj zog, toughness, thiab qaug zog kuj tseem ceeb heev rau kev ua haujlwm thiab kev nyab xeeb.
3. SA514 Qib F puas tuaj yeem welded?
Yog lawm, tab sis nws yuav tsum tau ua cov txheej txheem vuam nruj nrog rau kev ua kom sov ua ntej (300-400℃F), qis-hydrogen electrodes, thiab feem ntau tom qab vuam cua sov (PWHT) vim nws muaj zog hardenability thiab pheej hmoo ntawm hydrogen-induced cracking.
4. Puas yog SA514 Qib F puas muaj qhov zoo ntawm qhov kub thiab txias?
Yog lawm, nws muaj qhov ua tau zoo heev ntawm qhov kub thiab txias, feem ntau yuav tsum muaj qhov tsawg kawg nkaus Charpy V-notch cuam tshuam tus nqi ntawm 54 J (40 ft-lb) ntawm -40℃(-40℃F), ua rau nws haum rau kev siv huab cua txias.
Tag nrho cov specification thiab cov ntsiab lus muaj nyob rau ntawm kev thov. Cov ntaub ntawv saum toj no yog muab rau kev taw qhia nkaus xwb. Rau kev tsim tshwj xeeb thov hu rau peb cov neeg ua haujlwm muag khoom.
