Txheej txheem cej luam
ASTM A519 Cov Lus Qhia Tshwj Xeebyog tus qauv specification rau"Seamless Carbon thiab Alloy Steel Mechanical Tubing."Nws npog ntau yam ntawm cov qib.
SA519 Qib 4130yog ib qib tshwj xeeb hauv tus qauv ntawd. Lub "SA" ua ntej qhia tias nws kuj ua tau raws li qhov yuav tsum tau muaj ntawm ASME Boiler thiab Pressure Vessel Code, ua rau nws tsim nyog rau cov ntawv thov kev siv zog.
Hauv cov ntsiab lus yooj yim,TIAB SA 519 Gr 4130yog aseamless, chromium{0}}molybdenum (chrome-moly) alloy steel tubepaub txog nws lub zog siab, zoo toughness, thiab zoo heev weldability.
Cov yam ntxwv tseem ceeb ntawm SA519 Gr 4130
Seamless Kev Tsim Kho:Cov yeeb nkab yog tsim los ntawm kev tho lub pob zeb, ua rau cov khoom tsis muaj welded seam. Qhov no muab lub zog muaj zog thiab siab ncaj ncees piv rau welded (ERW) tubing.
Siab zog - rau - Qhov hnyav piv:Nws muaj zog ntau dua li cov qauv carbon steels (xws li A106 lossis A53), tso cai rau cov phab ntsa nyias nyias thiab cov khoom hnyav dua yam tsis muaj kev txi.
Zoo Ductility thiab Toughness:Nws tuaj yeem khoov thiab tsim, thiab nws muaj kev cuam tshuam zoo, tshwj xeeb tshaj yog nyob rau hauv cov xwm txheej zoo li qub thiab tempered.
Weldability zoo heev:Nws yog yooj yim weldable siv ntau txoj hauv kev, txawm tias ua ntej - cua sov thiab tom qab -weld heat treatment (PWHT) feem ntau pom zoo kom tiv thaiv kev tawg thiab kho cov khoom siv kho tshuab.
Thaum tshav kub kub Treatable:Nws cov khoom tuaj yeem txhim kho zoo heev los ntawm cov txheej txheem kho cua sov xws li normalizing, quenching, thiab tempering.
Tshuaj muaj pes tsawg leeg
Cov tshuaj muaj pes tsawg leeg (hauv feem pua ntawm qhov hnyav) yog qhov tseem ceeb hauv nws cov khoom.
| Lub ntsiab | Kev sib xyaw (%) |
|---|---|
| Cov pa roj carbon (C) | 0.28 - 0.33 |
| Manganese (Mn) | 0.40 - 0.60 |
| Phosphorus (P) | 0.035 max |
| Sulfur (S) | 0.040 max |
| Silicon (Si) | 0.15 - 0.35 |
| Chromium (Cr) | 0.80 - 1.10 |
| Molybdenum (hli) | 0.15 - 0.25 |
Chromium (Cr)nce hardenability, corrosion / oxidation kuj, thiab lub zog.
Molybdenum (hli)txhim khu lub zog, tshwj xeeb tshaj yog nyob rau hauv high kub, thiab txhim kho hardenability thiab weldability.
Mechanical Properties
Cov khoom siv kho tshuab tuaj yeem sib txawv raws li qhov kev kho cua sov (piv txwv li, txias rub, normalized, normalized thiab tempered). Cov hauv qab no yog cov nqi qis kawg nkaus rauNormalized thiab Temperedmob, uas yog heev.
| Khoom | Tus nqi |
|---|---|
| Tensile zog | 70,000 psi (485 MPa) min |
| Yield zog | 45,000 psi (310 MPa) min |
| Elongation hauv 2 " | 25% min |
(Faj seeb: Rau qhov txias txias, cov khoom muaj zog tuaj yeem siab li 75,000 psi, tab sis elongation qis dua.)
Cov ntawv thov siv
SA519 Gr 4130 yog xaiv rau cov ntawv thov uas muaj zog, qhov hnyav, thiab ua haujlwm ntev yog qhov tseem ceeb.
Aerospace:Hydraulic kab, tsaws iav Cheebtsam, cav mounts, airframe lug.
Automotive & Kev Sib Tw:Dov tawb, chassis tubing, tsav shafts, ncua kev kawm ntawv Cheebtsam.
Roj & Roj:Downhole tubing, instrumentation kab, manifolds hauv siab - kev pabcuam siab.
Machinery thiab khoom siv:Lub tog raj kheej lub tog raj kheej, hydraulic rams, piston pas nrig, thiab siab - cov qauv kev nyuaj siab.
Kev lag luam Cycle:Siab -kev ua tau zoo tsheb kauj vab thav duab (tshwj xeeb tshaj yog nyob rau hauv kev cai tsim).
Muaj daim ntawv thiab qhov ntau thiab tsawg
Seamless nkaus xwb.
Cov duab:Feem ntau puag ncig, tab sis kuj muaj nyob rau hauv square thiab rectangular mechanical tubing.
Qhov ntau thiab tsawg:Ntau yam ntawm sab nraud diameters (OD) thiab phab ntsa thicknesses muaj, feem ntau ua raws li tus qauv tubing qhov ntau thiab tsawg.
Kev txiav txim siab ntawm Machining thiab Vuam
Machining:4130 steel feem ntau suav hais tias muaj kev ua haujlwm zoo nyob rau hauv cov xwm txheej zoo li qub thiab tempered. Nws yog nruj dua li qis- carbon steels, yog li cov cuab yeej tsim nyog thiab nrawm yog tsim nyog.
Vuam:Nov yog thaj chaw tseem ceeb.
Ua ntej - cua sovtau pom zoo (feem ntau 300-400℃F / 150-200 degree) rau cov ntu tuab dua 0.120 ntiv tes txhawm rau tiv thaiv kev tawg ntawm hydrogen.
Filler Hlau:Cov kev xaiv feem ntau yog ER80S-D2 lossis ER70S-2. Rau cov ntawv thov tseem ceeb, qhov sib txuam 4130 muab tub lim tuaj yeem siv tau.
Tshaj tawm -Weld Heat Treatment (PWHT):Pom zoo kom txo cov kev ntxhov siab thiab rov ua kom tawv nqaij hauv tshav kub -Teb chaws cuam tshuam (HAZ). Qhov no suav nrog tempering ntawm ib ncig ntawm 1100℃F (595 degree).
Sib piv nrog Lwm Cov Qauv
ASTM A519 thiab ASTM A106:A106 yog rau siab -kev pabcuam kub (piv txwv li, cov kav dej, boilers) thiab feem ntau yog carbon steel. A519 Gr 4130 yog cov hlau alloy uas tsim los rau kev siv tshuab ua kom muaj zog dua.
ASTM A519 thiab ASTM A333:A333 npog qis- qhov kev pabcuam kub, thaum A519 tsis yog qhov tshwj xeeb rau qhov qis- qhov kub thiab txias yam tsis tau teev tseg.
Cov ntsiab lus
ASTM SA519 Qib 4130yog tus hwm -qib, seamless alloy steel tubing khoom plig rau nws:
Siab zog thiab toughness.
Kev qaug zog zoo.
Weldability zoo heev (nrog cov txheej txheem tsim nyog).
Txaus siab rau lub zog - rau - qhov hnyav piv.
Nws yog cov khoom ntawm kev xaiv rau engineers thiab designers ua hauj lwm nyob rau hauv ib qho tseem ceeb, siab -stress Cheebtsam nyob rau hauv lub aerospace, motorsport, thiab siab - machinery kev lag luam.
