SA514 Qib E yog lub siab -lub zog, quenched thiab tempered alloy steel phaj paub rau zoo heev toughness, weldability, thiab tej yam kuj, tshwj xeeb tshaj yog nyob rau hauv qis kub, siv nyob rau hauv cov khoom hnyav, kev tsim kho, thiab mobile platforms. Nws muaj qhov tsawg kawg nkaus lub zog ntawm 100 ksi (txog 2.5 "tuab) thiab 90 ksi (dhau 2.5" mus rau 6" tuab), muaj cov khoom siv tshwj xeeb ntxiv xws li Chromium thiab Molybdenum rau kev txhim kho kev ua tau zoo hauv kev thov cov qauv siv.
Cov yam ntxwv tseem ceeb
High Strength: Muab siab yield thiab tensile lub zog rau lub teeb yuag tsis tau muaj zog Cheebtsam.
Toughness: Zoo heev cuam tshuam toughness, txawm nyob rau hauv ib puag ncig txias, ua rau nws zoo tagnrho rau qis - kub kev pab cuam.
Weldability: Tsim los rau kev siv cov qauv, nws yog weldable nrog preheat kom zoo thiab txwv cua sov input.
Chemical Composition: Muaj Chromium (1.40-2.00%) thiab Molybdenum (0.40-0.60%), nrog rau cov pa roj carbon, manganese, Silicon, Titanium, thiab Boron.
Lub hardness ntawm SA514 Qib E tsis yog cov cuab yeej tshwj xeeb hauv ASTM A514 tus qauv, uas tsom rau cov khoom siv kho tshuab xws li tawm los / tensile zog thiab cuam tshuam toughness. Txawm li cas los xij, raws li nws lub zog thiab microstructure, ib txwm muaj thiab xav tau hardness ntau tuaj yeem muab tau.
Hom Hardness Range rau SA514 Qib E
Vim nws quenched thiab tempered microstructure, SA514 Qib E feem ntau muaj ib tug hardness nyob rau hauv ntau yam ntawm:
HBW 280 - 340 (Brinell Hardness) los yog kwv yees li HRC 29 - 36 (Rockwell C nplai).
Qhov no sib raug zoo nrog nws qhov tsawg kawg nkaus tawm lub zog ntawm 100 ksi (690 MPa). Ib txoj cai ntawm tus ntiv tes xoo rau cov hlau yog tias Brinell hardness (HB) yog kwv yees li 0.5 npaug ntawm qhov kawg tensile zog hauv MPa. Rau SA514 Qib E (UTS ~ 760-895 MPa), qhov no yields qhov kwv yees HB ntau ntawm 380 - 447, tab sis qhov no yog siab dhau rau lub tempered mob. Cov txheej txheem quenched thiab tempered yog qhov tseem ceeb ntawm qhov sib npaug ntawm lub zog thiab toughness, uas ua rau qis dua hardness me ntsis dua li lub xeev hardened tag nrho.
Qhov tseem ceeb: Qhov no yog ib qhoempirical ntau yam. Qhov tseeb hardness rau ib phaj tshwj xeeb tuaj yeem sib txawv raws li:
Thickness: Thicker seem yuav muaj me ntsis hardness vim qeeb qeeb qeeb thaum quenching.
Chaw tsim tshuaj paus txheej txheem kev kho cua sov.
Kuaj qhov chaw ntawm lub phaj.
Vim li cas Hardness tsis yog Tswj Khoom
1.Standard Specification:ASTM A514 / A514M yog tus qauv steel qauv. Rau engineering tsim, yield zog thiab toughness yog qhov tseem ceeb, cog lus guaranteed khoom. Hardness feem ntau tsuas yog kuaj xyuas raws li kev kuaj xyuas ntxiv lossis kev lees paub zoo.
2. Lub Hom Phiaj Tseem Ceeb:SA514 Qib E yog tsim los rau weldable, siab - kev siv cov qauv siv (cranes, txuas hniav, cov khoom siv mining). Lub hardness ntau dhau tuaj yeem ua rau muaj kev puas tsuaj rau weldability thiab toughness, yog li cov txheej txheem quench thiab temper yog optimized rau cov khoom sib npaug, tsis yog siab tshaj hardness.
3.Conversion Limitations:Txawm hais tias hardness - muaj zog correlations muaj nyob, lawv yog approximations thiab nyob ntawm seb cov hlau tshwj xeeb microstructure. Kev cia siab rau tus nqi hloov dua siab tshiab rau kev tsim yog tsis tsim nyog.
Yog hais tias koj xav tau ib tug guarantee hardness nqi
Yog tias koj daim ntawv thov (piv txwv li, rau kev puas tsuaj) xav tau ib qho nyuaj, koj yuav tsum:
Qhia nws ua ib qho kev xav tau ntxiv thaum xaj khoom. Cov chaw tsim khoom tuaj yeem kho cov txheej txheem tempering kom tau raws li qhov sib zog hardness.
Xav txog lwm qib: Yog tias hardness / abrasion tsis kam yog qhov tseem ceeb, koj yuav xav txog AR (Abrasion Resistant) phaj qib zoo li AR400 lossis AR500 (ASTM A514 yog ib qhotus qauvqib, tsis yogpuasqib).
Key Takeaway
Thaum HBW 280-340 (HRC 29-36) yog qhov kev cia siab ntawm ntau yam, cov khoom tseem ceeb rau SA514 Qib E yog nws qhov tsawg kawg nkaus yield zog ntawm 100 ksi (txog 1.25 "tuab) thiab nws Charpy V-notch cuam tshuam toughness ntawm -50℃F (-46℃rau cov khoom siv, los yog M. A514 tus qauv.
Rau tus nqi tseeb, koj yuav tsum yog:
Kuaj ib qho qauv ntawm koj lub phaj tshwj xeeb / cua sov.
Thov daim ntawv pov thawj kev xeem ntawv los ntawm lub zeb, uas qee zaum suav nrog cov ntaub ntawv hardness raws li cov ntaub ntawv ntxiv.
1. Dab tsi yog SA514 Qib E Hlau?
SA514 Qib E yog siab - lub zog, quenched thiab tempered alloy steel phaj nyob rau hauv ASTM A514 / SA514 specification, tsim rau cov ntawv thov uas yuav tsum tau muaj ib tug sib npaug ntawm high yield zog thiab zoo heev toughness.
2. Dab tsi yog qhov Yield Strength ntawm SA514 Qib E?
Qhov tsawg kawg nkaus yield zog ntawm SA514 Qib E yog 100 ksi (690 MPa) rau thicknesses txog 2.5 nti (63.5 hli). Rau cov phaj tuab, qhov tsawg kawg nkaus yield zog txo.
3. Qhov txawv ntawm SA514 Qib E thiab Qib F yog dab tsi?
Thawj qhov sib txawv yog cov tshuaj muaj pes tsawg leeg. Qib E feem ntau muaj cov qib sib txawv ntawm cov khoom sib txawv (xws li Chromium, Molybdenum, thiab Boron) piv rau Qib F, uas tuaj yeem cuam tshuam rau hardenability, weldability, thiab cov ntawv thov tshwj xeeb, txawm tias ob leeg muaj 100 ksi min yield.
4. Puas yog SA514 Qib E Weldable?
Yog, tab sis nrog cov txheej txheem nruj. Nws yuav tsum tau preheating, siv tsawg -hydrogen electrodes, thiab tswj cov cua sov input los tiv thaiv kev tawg thiab tuav txhua yam khoom nyob rau hauv lub tshav kub- cuam tshuam cheeb tsam (HAZ).
5. Dab tsi yog SA514 Qib E siv rau?
Nws yog siv rau hauv cov txheej txheem kev nyuab siab heev rau kev tsim kho hnyav thiab cov khoom siv mining, xws li crane booms, excavator caj npab, thiab thav ntawv qhov twg muaj zog thiab toughness.
6. Cov tshuaj muaj pes tsawg leeg ntawm SA514 Qib E yog dab tsi?
Nws cov ntsiab lus muaj xws li Carbon (~ 0.15-0.21%), Manganese (~ 0.80-1.10%), Silicon (~ 0.40-0.80%), Chromium (~ 0.50-0.80%), Molybdenum (~ 0.18-0.28%), Vanadium (~ 0.08%), thiab 0. (0.0005-0.005%).
7. Qhov Hardness ntawm SA514 Qib E yog dab tsi?
Brinell hardness ntau yam rau SA514 Qib E yog 235-293 HBW (kwv yees li 22-30 HRC), zoo ib yam li lwm qib zoo li Qib F, vim nws kuj yog ib qho quenched thiab tempered steel.
8. Ua li cas SA514 Qib E piv rau T1 Hlau?
SA514 Qib Eyogib hom T1 steel. "T1" yog lub npe lag luam keeb kwm rau A514 / SA514 quenched thiab tempered steels. Qib E yog ib qho tshuaj muaj pes tsawg leeg sib txawv raws li tus qauv no.
9. SA514 Qib E puas tuaj yeem txiav nplaim taws?
Yog, nws tuaj yeem raug nplaim taws, tab sis nws yuav tsum tau tswj cov txheej txheem. Preheating ua ntej txiav thiab qeeb, tswj kom txias (feem ntau los ntawm kev siv cov cua sov torches) yog tsim nyog los tiv thaiv kev tsim ntawm nyuaj, tawg - rhiab zones raws ntug txiav.
10. Qhov sib npaug ntawm SA514 Qib E Hauv Tebchaws Europe yog dab tsi?
Tsis muaj qhov ncaj, zoo ib yam European sib npaug. Cov qib ze tshaj plaws nyob rau hauv cov nqe lus ntawm lub zog siab thiab quenched & tempered mob yog S690QL los yog S690QL1 (EN 10025-6), txawm tias lawv cov tshuaj muaj pes tsawg leeg sib txawv.
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.
