1. Q: Dab tsi yog ovm 519 1008 cov yeeb nkab} steel hlau ua los ntawm?
A:
Cov khoom siv: cov roj carbon steel nrog cov ntsiab lus carbon uas muaj kwv yees li 0.08% (1008 yog SAE kev tsim qauv, sib xws rau cov ntsiab lus carbon ntawm IC0.10%).
Txheem: Astm A519 qhia meej cov roj carbon thiab alloy steel neeg siv lub tubing, nrog 1008 ua ib qho ntawm cov roj carbon steel.
Cov Khoom: Tsawg lub zog tab sis kev du me me, ua kom nws yooj yim rau kev ua haujlwm txias (xws li muaj vuam thiab vuam), thiab siv tau hauv cov txheej txheem kev ntxhov siab tsawg.
2. Q: Dab tsi yog qhov tseem ceeb ntawm Astm 519 1008 steel yeeb nkab?
A:
Cov Kev Siv Raug:
Cov txheej txheem neeg kho txhua yam (xws li Shafts thiab cov nkhaus);
Kev lag luam yam lag luam (cov khoom siv tsis-cov kabmob);
Cov pip kev siab qis hauv cov tshuab hydraulic;
Rooj tog lossis cov tub rog dai.
Cov kev txwv: Vim nws lub zog qis, nws tsis haum rau kev kub siab lossis siab} Q: {} steel yeeb nkab?
A:
Kev siv qhov tseem ceeb (cov nqi tshwj xeeb yog raug rau qhov tseeb kev kho cua sov):
Lub zog tensile: kwv yees li 300-450 mpa;
Peple lub zog: kwv yees li 170-300 mpa;
Elongation: ≥ 20-30% (qhia txog kev ductility zoo).
Kev sib piv: qis dua lub zog dua li alloy steel (xws li 4140), tab sis tus nqi qis.
4. Q: Ua tau Astm 519 1008 steel yeeb nkab yuav welded? Yuav ua li cas ceev faj?
A:
Weldability: zoo heev. Cov hlau roj carbon tsawg yog tsis tau txais rau weld cracking.
Cov lus pom zoo:
Cov hau kev pab cuam (xws li arc vuam thiab mig / tus vuam vuam) tuaj yeem siv.
Preheard tsis tas yuav tsum tau, tab sis kev tawm tshiab ntau dhau yuav tsum zam kom tiv thaiv deformation.
Tom qab kev kho cua sov-weld feem ntau tsis tas yuav tsum tau. 5.} Cov yeeb nkab ntawm519 1008 Cov xaim hlau (xws li 1020 thiab 1045)?
A:
Cov ntsiab lus carbon: 1008 (≤0.10%) <1020 (0.18-0.23%) <1045 (0.43%%).
Kev Ua Txawv Sib Txawv:
1008: muag muag, yooj yim rau cov txheej txheem, qis tshaj plaws lub zog;
1020/1045: Ua kom muaj zog ntxiv, tab sis txo qis wardability, xav tau preheating.
Kev xaiv: Qhov sib npaug ntawm cov kev xav tau nrog kev ua cov hau kev.
