SA514 Qib Eyog 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.
SA514 Qib E puas tuaj yeem raug nplaim taws txiav?
Yog lawm, SA514 Qib E tuaj yeem raug nplaim taws (oxy- txiav roj), tab sis nws yuav tsum tau ua raws li cov txheej txheem kom raug kom tsis txhob tawg thiab tawv hauv qhov txiav. Qhov no yog vim nws siab hardenability los ntawm quenched thiab tempered microstructure.
Nov yog cov lus qhia tseem ceeb rau kev ua tiav nplaim taws txiav SA514 Qib E:
1. Preheating yog TSEEM CEEB
Lub Hom Phiaj: Txhawm rau qeeb qhov txias txias ntawm cov hlau tom qab txiav, tiv thaiv kev tsim ntawm ib qho nyuaj, nkig martensitic qauv nyob rau hauv lub tshav kub-Txoj kev cuam tshuam cheeb tsam (HAZ) raws ntug txiav.
Hom Preheat Kub: 150℃txog 260℃(300℃F txog 500℃F) feem ntau pom zoo. Qhov ntsuas kub yog nyob ntawm qhov tuab ntawm lub phaj.
Thicker daim hlau yuav tsum tau preheat ntau dua los tiv thaiv lawv cov nyhuv hluav taws xob sai.
Uniformity: Tag nrho cheeb tsam nyob ib ncig ntawm qhov txiav yuav tsum tau rhuab uniformly, feem ntau mus rau ib tug dav ntawm yam tsawg kawg nkaus 75-100 mm (3-4 ntiv tes) ntawm txhua sab ntawm txoj kab txiav.
2. Tshaj tawm -Txiav qeeb qeeb lossis txo kev ntxhov siab
Tom qab txiav, lub workpiece yuav tsum tau qeeb -txias (xws li, npog nrog insulating pam vov) mus rau chav tsev kub. Rau cov ntawv thov tseem ceeb lossis cov ntu tuab heev, kev tshaj tawm -txiav kev ntxhov siab ntawm kwv yees li 590-675℃(1100-1250℃F) tej zaum yuav raug teev los xyuas kom meej tias cov ntug hardened tempered.
3. Cov txheej txheem txiav & khoom siv
Siv hluav taws xob ntse, huv si nrog cov roj roj (acetylene, propane, lossis natural gas).
Ua kom ruaj khov, tsis tu ncua txiav ceev. Txiav qeeb heev tuaj yeem overheat cov hlau; ceev heev tuaj yeem ua rau ragged, tsis sib xws.
Xyuas kom tseeb tias qhov hluav taws xob txiav yog perpendicular rau lub phaj nto.
4. Tshaj tawm -Txiav Kev Tshuaj Xyuas thiab Tshuab
Hardness Check: Cov ntug txiav yuav nyuaj dua li lub hauv paus hlau. Nws yog ib qho kev xyaum zoo los ntsuas qhov hardness hauv HAZ.
Dye Penetrant Testing (PT): Pom zoo rau kev txiav tseem ceeb los kuaj xyuas micro- tawg.
Ntug Machining: Rau cov khoom uas muaj kev ntxhov siab heev, cov nplaim taws - txiav ntug yuav tsum tau muab tshem tawm los ntawm kev ua haujlwm lossis kev sib tsoo (feem ntau yam tsawg kawg yog 1/16 "rau 1/8" lossis 1.5-3mm) txhawm rau tshem tawm cov tawv tawv, muaj peev xwm micro-cracked HAZ ua ntej qhov chaw muab tso rau hauv kev pabcuam.
Vim li cas cov kev ceev faj no yuav tsum tau
SA514 Qib E cov ntsiab lus siab alloy thiab quenched & tempered mob ua rau nws raug rau hydrogen-induced cracking (HIC) thiab huab cua hardening. Qhov khaus, thaj chaw kub ntawm cov nplaim taws tuaj yeem tsim qhov nqaim HAZ uas txias sai sai hauv huab cua, hloov mus rau hauv tawv, tawg -sensitive martensite.
Lwm txoj kev txiav (feem ntau nyiam)
Rau cov laj thawj no, ntau tus neeg tsim khoom nyiam cov qauv no rau SA514 Qib E, raws li lawv qhia cov cua sov tsawg thiab txo cov teeb meem HAZ:
Plasma Cutting: Ceev dua, nrog rau qhov nqaim dua thiab cov cua sov tsawg dua. Preheating tej zaum tseem yuav xav tau rau cov phaj tuab heev.
Waterjet Txiav: Txias - txheej txheem txiav. Tsis muaj cua sov- thaj tsam cuam tshuam, tsis muaj qhov tawv, thiab tsis xav tau preheat. Zoo tagnrho rau cov duab complex thiab cov khoom tseem ceeb.
Laser Txiav: Siv tau rau cov phaj nyias nyias nrog kev ua haujlwm siab thiab HAZ tsawg.
Cov ntsiab lus zoo tshaj plaws
Tham nrog tus neeg muag khoom: Nco ntsoov ua raws li cov chaw tsim khoom steel cov lus pom zoo tshwj xeeb rau lawv cov khoom.
Ua raws li Cov Txheej Txheem Tsim Nyog: Siv cov txheej txheem sau ntawv, tsim nyog txiav cov txheej txheem qhia qhov ntsuas kub ua ntej, txiav cov ntsuas, thiab tom qab- txiav tuav.
Thaum tsis ntseeg, Siv lwm txoj hauv kev: Rau cov ntawv thov tseem ceeb, waterjet lossis plasma txiav nrog preheat kom raug feem ntau yog qhov kev xaiv zoo dua, txhim khu kev qha ntau dua li oxy- txiav roj.
Hauv luv luv: Yog, nws tuaj yeem raug nplaim taws txiav, tab sis tsuas yog ua tib zoo tswj hwm ntawm preheat, txheej txheem, thiab tom qab- txiav kev kho kom tsis txhob tawg thiab ua kom muaj kev ncaj ncees ntawm cov khoom.
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.
