ASTM A514 Qib Fyog qhov siab - tawm los, quenched thiab tempered alloy steel phaj feem ntau yog siv rau cov qauv siv uas qhov hnyav txuag thiab siab zog yog qhov tseem ceeb. Nws yog ib feem ntawm tsev neeg ntawm cov hlau feem ntau raug xa mus los ntawm lub npe lag luam T-1 steel.
Cov ntsiab lus tseem ceeb
Yield Strength: Yam tsawg kawg 100 ksi (kwv yees . 690 MPa) rau thicknesses txog 2.5 ntiv tes.
Tensile Strength: Feem ntau 110-130 ksi.
Qhov xwm txheej: Muab xa mus rau hauv lub xeev quenched thiab tempered kom ua tiav nws siab - lub zog thiab cov khoom siv tawv tawv.
Thickness Range: Cov qauv muaj rau Qib F yog feem ntau mus txog 2.5 nti (63.5 mm).
Daim ntawv thov
Vim nws lub zog siab - rau - qhov hnyav piv thiab tiv thaiv cov kab nrib pleb hauv huab cua txias, nws feem ntau siv rau hauv:
Khoom hnyav: crane booms, mining tsheb lub cev, thiab loaders.
Infrastructure: Welded choj thiab lub tsev thav duab.
Kev Thauj Khoom: Cov tsheb hnyav hnyav, chassis, thiab thauj cov tsheb thauj khoom.
Koj puas tuaj yeem nplaim hluav taws txiav A514 Qib F?
Yog lawm, A514 Qib F tuaj yeem yog nplaim hluav taws txiav (oxy- roj txiav), tab sis nws yuav tsum muaj kev tswj hwm nruj kom tsis txhob tawg thiab ntug tawv.
Nov yog cov kauj ruam tseem ceeb uas yuav tsum tau ua thiab xav txog:
Cov txheej txheem tseem ceeb:
Preheating yog yuav tsum tau: Qhov chaw nyob ntawm txoj kab txiav yuav tsum tau sib npaug rhuab mus rau 300℃F - 500℃F (150℃- 260℃) ua ntej txiav. Qhov no ua rau qeeb tus nqi txias thiab tiv thaiv kev tsim ntawm ib qho nyuaj, tawg -rhiab martensitic qauv nyob rau hauv lub tshav kub- cuam tshuam cheeb tsam (HAZ).
Khaws Cia Kub: Lub preheat yuav tsum tau txhawb nqa thaum lub sijhawm ua haujlwm tag nrho.
Tom qab- Txiav qeeb qeeb: Tom qab txiav, lub workpiece yuav tsum maj mam txias (xws li, npog nrog ib daim pam insulating) rau hauv chav tsev kub kom cia tej microstructures hardened npaus. Rau cov khoom uas muaj kev ntxhov siab heev, kev tshaj tawm raug cai - txiav kev ntxhov siab ntawm 1100℃F - 1250℃F (595℃- 675}℃) tej zaum yuav raug teev.
Vim li cas cov kev ceev faj no yuav tsum tau:
Txawm hais tias nws zoo dua weldability piv rau Qib E, A514 Qib F tseem yog quenched thiab tempered alloy steel nrog siab hardenability. Qhov khaus, thaj chaw kub ntawm cov nplaim hluav taws tuaj yeem tsim qhov nqaim HAZ uas txias sai sai hauv huab cua, hloov mus rau nkig martensite thiab tsim kev ntxhov siab tawg.
Superior Alternative Methods (pom zoo):
Rau cov ntawv thov tseem ceeb, cov txheej txheem no feem ntau nyiam vim muaj cua sov tsawg dua thiab txo kev pheej hmoo:
Plasma Txiav: Ceev dua, nqaim kerf. Preheat kuj tseem yuav xav tau rau cov phaj tuab.
Waterjet Txiav: Qhov kev xaiv zoo tshaj plaws. Cov txheej txheem txias uas ua rau tsis muaj HAZ, tsis muaj zog, thiab yuav tsum tsis muaj preheat. Zoo tagnrho rau cov duab complex.
Laser Txiav: Muaj tseeb rau cov phaj nyias nyias nrog HAZ tsawg.
Qhov Zoo Tshaj Plaws Thaum Kawg:
Ib txwm ua raws li cov chaw tsim khoom steel cov lus pom zoo tshwj xeeb.
Rau cov khoom siv, cov nplaim taws- txiav ntug feem ntau yuav tsum tau muab tshem tawm los ntawm kev ua haujlwm lossis kev sib tsoo (tsawg kawg 1/16" lossis 1.5mm) txhawm rau tshem tawm HAZ hardened ua ntej muab tso rau hauv kev pabcuam.
Rau cov ntaub ntawv nyuaj lossis tseem ceeb, waterjet lossis tswj ntshav plasma txiav nrog preheat yog pom zoo kom hla nplaim taws.
Hauv luv luv: Nws yog ua tau, tab sis nws yog ib qho kev pheej hmoo siab - kev ua haujlwm uas xav tau kev tswj hwm. Lwm txoj kev txiav yog feem ntau muaj kev nyab xeeb thiab txhim khu kev qha.
Khoom Siv Chemistry
|
SI |
FE |
MN |
CR |
MO |
TSI |
B |
V |
C |
|
0.28% |
98.0% |
0.85% |
0.48% |
0.2% |
0.02% |
0.003% |
0.05% |
0.27 – 0.30% |
Yield / Tensile zog
|
Metric |
Imperial |
|
|
Tensile Strength, Qhov kawg |
760-895 MPa |
110,000 - 130,000 psi |
|
Tensile zog, tawm los |
690 MPa ua |
100,000 psi |
|
Elongation ntawm Break (hauv 50 mm) |
18% |
18% |
|
Modulus Elasticity |
190-210 GPa |
27,557–30,458 ksi |
|
Bulk Modulus (Tswj rau Steel) |
140 GPa |
203,000 ksg |
|
Poissons Ratio |
0.27 – 0.30 |
0.27 – 0.30 |
|
Shear Modulus (Tswj rau Steel) |
80 gpa ua |
116,000 ksi |
1. Dab tsi yog A514 Qib F steel siv rau?
A514 Qib F feem ntau yog siv rau hauv siab - muaj zog cov qauv siv xws li cov khoom siv hnyav, crane booms, mining machinery, thiab txuas hniav uas yuav tsum muaj lub zog zoo tshaj - rau - qhov hnyav piv.
2. Lub zog tawm ntawm A514 Qib F yog dab tsi?
Rau cov phaj siab txog 1.25 ntiv tes (31.75 hli) tuab, qhov tsawg kawg nkaus lub zog yog 100 ksi (690 MPa). Rau cov phaj tuab, lub zog tawm los txo qis, feem ntau mus txog 90 ksi (620 MPa) txog 2.5 ntiv tes.
3. A514 Qib F puas tuaj yeem welded?
Yog lawm, nws tuaj yeem welded, tab sis nws yuav tsum muaj cov txheej txheem nruj xws li preheating, siv qis -hydrogen electrodes, thiab feem ntau tshaj tawm -weld tshav kub kho kom tsis txhob tawg vim nws cov hardenability siab.
4. A514 Qib F txawv li qib E li cas?
Qhov sib txawv tseem ceeb yog nyob rau hauv chemistry: Qib F muaj qis carbon thiab alloy cov ntsiab lus (thiab tsis muaj boron), uas ua rau weldability zoo dua thiab qis dua carbon sib npaug, thaum ob qib muab tib yam tsawg kawg nkaus yield zog.
5. Lub hardness ntawm A514 Qib F yog dab tsi?
Lub hardness ntau yam rau A514 Qib F yog kwv yees li HBW 280-340 (Brinell) lossis HRC 29-36, tab sis hardness tsis yog cov cuab yeej teev hauv ASTM tus qauv.
6. Puas yog A514 Qib F zoo ib yam li T1 steel?
Yog lawm, A514 Qib F feem ntau raug xa mus rau "T1 Hom F" lossis "hloov T1." Lub npe "T1" Ameslikas los ntawm cov cim lag luam, tab sis feem ntau nws yog siv rau tsev neeg ntawm siab - lub zog, quenched thiab tempered steels.
7. Cov European sib npaug ntawm A514 Qib F yog dab tsi?
Qhov sib npaug European ze tshaj plaws yog S690QL lossis S690Q / QL1 raws li EN 10025-6, uas muaj qhov zoo sib xws 690 MPa yield zog thiab quenched & tempered mob.
8. Koj puas tuaj yeem nplaim hluav taws txiav A514 Qib F?
Yog lawm, tab sis nws yuav tsum tau ua kom sov (feem ntau 300-500℃F) thiab tswj kom txias kom tsis txhob tawv thiab tawg ntawm ntug txiav. Plasma lossis waterjet txiav yog feem ntau nyiam lwm txoj hauv kev.
9. Cov tshuaj muaj pes tsawg leeg ntawm A514 Qib F yog dab tsi?
Nws muaj cov ntsiab lus qis dua (max 0.20%) piv rau Qib E, nrog rau kev txo qis ntawm chromium, molybdenum, thiab tsis muaj boron, uas ua rau qis carbon sib npaug rau kev txhim kho weldability.
10. Vim li cas thiaj xaiv A514 Qib F dhau qib E?
Xaiv Qib F thaum weldability thiab fabrication yooj yim yog qhov tseem ceeb tshaj plaws rau cov qauv complex, raws li nws cov leaner chemistry txo qhov kev pheej hmoo ntawm vuam -txog tawg piv rau qib siab dua - alloy Qib E.
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.
