Qhov txawv ntawm A514 qib E thiab A514 qib F yog dab tsi?
A514 Qib Eyog lub siab -lub zog, quenched thiab tempered alloy steel nyob rau hauv ASTM A514 specification, muab ib tug yam tsawg kawg nkaus yield zog ntawm 100 ksi (690 MPa). Nws lub ntsiab lus txhais yog txhim kho atmospheric corrosion kuj (kwv yees li ob zaug ntawm carbon steel), ua tiav los ntawm kev tswj chemistry nrog cov ntsiab lus siab Molybdenum. Qib no yog tsim los rau cov ntawv thov xws li cov tshuab tsis muaj xim sab nraum zoov lossis cov khoom siv sib xyaw uas yuav tsum muaj lub zog hnyav thiab ib puag ncig ib puag ncig, txuas qhov sib txawv ntawm cov qauv siab - lub zog steel thiab cov qib huab cua tag nrho.
A514 Qib Fyog qib siab tshaj plaws thiab dav muaj nyob hauv ASTM A514 tsev neeg, kuj tseem muab 100 ksi (690 MPa) yam tsawg kawg nkaus lub zog los ntawm quenching thiab tempering. Distinguished los ntawm nws boron-kho chemistry rau optimum hardenability, nws ua hauj lwm raws li qhov dav -lub hom phiaj ultra- siab- lub zog steel qauv rau qhov tseem ceeb, qhov hnyav - cov khoom rhiab heev xws li crane booms, mining shovel dippers }} siab tshaj qhov muaj peev xwm, thiab qhov siab tshaj plaws yog qhov tseem ceeb ntawm kev sib txuas, thiab qhov muaj peev xwm siab tshaj plaws ntawm cov khoom siv hluav taws xob, cov khoom siv hluav taws xob, cov khoom siv hluav taws xob, thiab lwm yam. kev tiv thaiv yog tswj los ntawm cov xim tshuab.
Thawj qhov sib txawv ntawm A514 Qib E thiab A514 Qib F yog nyob rau hauv lawv cov tshuaj muaj pes tsawg leeg, uas ua rau muaj qhov sib txawv corrosion kuj thiab qhov sib txawv me ntsis kev siv, thaum ob qho tib si tuav zoo tib yam 100 ksi (690 MPa) yam tsawg kawg nkaus lub zog thiab quenched & tempered microstructure.
1. Chemical Composition Comparison (Qhov hnyav %)
Qhov kev txiav txim sib txawv yog nyob rau hauvMolybdenum (hli)cov ntsiab lus, uas muab Qib E nws txhim kho corrosion kuj.
Chemical Summary:Lub hom phiaj sib txawv ntawm qhov sib txawv yog qhov siab dua Molybdenum ntau hauv Qib E (0.20–0.30% vs. 0.15–0.25%). Qhov no ua rau Qib E yog "corrosion- txhim kho" qhov txawv ntawm tus qauv Qib F chemistry.
2. Mechanical Properties Comparison
Ob chav kawm undergo quenching thiab tempering thiab yuav tsum tau ntsibzoo tib yam mechanical khoom yuav tsum.
| Khoom | A514 Qib E | A514 Qib F | Txheem / Lus Cim |
|---|---|---|---|
| Yield zog (min) | 100 ksi (690 MPa) | 100 ksi (690 MPa) | Ib yam. Lub ntsiab lus 100 ksi yam tsawg kawg nkaus. |
| Tensile zog | 115 - 135 ksi (790 - 930 MPa) | 115 - 135 ksi (790 - 930 MPa) | Ib yam. Ib yam li -rolled range. |
| Elongation (min, hauv 2 nti) | Ntau dua lossis sib npaug li 18% | Ntau dua lossis sib npaug li 18% | Ib yam. Yam tsawg kawg nkaus ductility yuav tsum tau. |
| Txo thaj tsam (min) | Ntau dua lossis sib npaug li 40% | Ntau dua lossis sib npaug li 40% | Ib yam. |
| Charpy V-Ntch Impact (min) | Ntau dua lossis sib npaug li 40 ft·lb (54 J) @ -40℃F (-40 degree) | Ntau dua lossis sib npaug li 40 ft·lb (54 J) @ -40℃F (-40 degree) | Ib yam. Yuav tsum tau qis -kub toughness. |
| Hardness (ntev) | 235-293 IB | 235-293 IB | Zoo sib xws Brinell hardness ntau yam. |
Mechanical Summary:Tsis muaj qhov sib txawv ntawm cov khoom siv kho tshuab tau lees paub. Ob qib tau teev tseg rau tib yam tsawg kawg nkaus lub zog, ductility, thiab toughness qhov tseem ceeb.
Yog vim li cas qhov Distinction tseem ceeb
Qhov kev xaiv tsis yog hais txog lub zog - nws yog hais txog ib puag ncig durability piv rau tus nqi / muaj.
Qib Eyog rau thaum koj xav tau "khoom plig" ntawm corrosion tsis kam mus rau 50 ksi weathering steel (A588) lossis mus txog 100 ksi weathering steel (A709 Qib 100W).
Qib Fyog rau thaum lub zog thiab toughness yog cov tsav tsheb nkaus xwb, thiab kev tiv thaiv corrosion yuav ua los ntawm cov coatings.
1. Dab tsi yog qhov tseem ceeb ntawm cov tshuaj sib txawv uas txhais tau tias A514 Qib E?
A514 Qib E yog qhov txawv ntawm nws cov ntsiab lus siab Molybdenum (Mo) (0.20-0.30%), uas muab kev txhim kho atmospheric corrosion tsis kam (kwv yees li 2 × carbon steel) thaum tuav 100 ksi yield zog ntawm A514 tsev neeg.
2. Puas yog A514 Qib E suav tias yog huab cua muaj tseeb zoo li A588?
Tsis yog, nws tsis yog tag nrho weathering steel. Thaum nws muaj kev txhim kho corrosion (~ 2 × carbon steel), qhov tseeb huab cua zoo li A588 lossis A709W muab 4-6 × tsis kam thiab tsim kom ruaj khov, tus kheej - tiv thaiv patina kom tsis txhob pleev xim rau tag nrho.
3. Dab tsi yog thawj daim ntawv thov niche rau A514 Qib E?
Nws yog siv rau siab - lub zog muaj zog cov yam ntxwv ntawm qhov chaw sab nraum zoov tab sis tsis tas yuav tsum tau pleev xim los yog tag nrho cov huab cua, xws li cov cuab yeej hnyav booms, thav duab, thiab cov qauv kev lag luam raug rau cov huab cua nruab nrab.
4. A514 Qib E piv rau A514 Qib F li cas?
A514 Qib E tsis tshua muaj thiab tshwj xeeb tshaj li Qib F. Qib F yog tus qauv, dav muaj 100 ksi Q&T steel, thaum Qib E tau teev tseg tsuas yog thaum nws txhim kho corrosion kuj yog qhov tsim nyog tsim.
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.
