1. Cov khoom txhais thiab cov khoom tseem ceeb
Q: Dab tsi yog ovm 519 4615 cov yeeb nkab?
A:
4615 cov pa roj carbon tsawg-molybdenum alloy steel seamless yeeb (uns g46150) teev nyob rau hauv astm ATTM A519 tus qauv. Nws cov tub ntxhais muaj pes tsawg leeg yog: 0.13% -0.18% carbon, 1.65% -2.00% npib tsib, thiab 0.20% molybdenum. Cov ntaub ntawv ua tiav tau sib npaug ntawm lub zog siab (tensile lub zog loj dua los yog sib npaug ntawm -50 MPA) thiab kev sib npaug ntawm cov npib tsib xee thiab molybdenum. Nws muaj cov yam ntxwv hnyav (roj quenching tseem ceeb hla dej
2. Cov Khoom Siv Cov Neeg Kho Tshuab thiab Cov Lus Qhia
Q: Qhov ntsuas tau ua tiav ntawm 4615 tus yeeb nkab steel? A:
Hauv lub xeev quenched thiab tempered (880℃roj quenching+ 600 deg℃tempering):
Lub zog cov khoom: tensile muaj zog 700-850 MPa, tawm lub zog 550-700 mpa
Kev nyuaj: elongation ntau dua los yog sib npaug ntawm 18%, txo thaj chaw ntau dua lossis sib npaug nrog 50%, -50℃kev cuam tshuam loj dua los yog sib npaug rau 55j
Cov Khoom Tshwj Xeeb: Tsawg-kub pob txha tawv (KIC @ -60 degree) ntau dua lossis sib npaug lossis sib npaug lossis sib npaug ntawm 65 MPH / NACE TM0177 xeem).
Tom qab ib txwm ua, lub noob nplej loj tuaj yeem ncav cuag cov qib ASTM 8-10, nrog kev pheej hmoo tsis zoo dua lossis sib npaug rau 5%.
3. Raug ntawv thov cov xwm txheej
Q: Cov ntaub ntawv thov ntawm 4615 cov yeeb nkab steel yog dab tsi?
A:
Cov Khoom Siv Zog: LNG Cia Tank txhawb nqa qauv, roj polar thiab roj pipelines (-60℃ib puag ncig)
Kev Siv Machinery: Excavator Booms thiab Crane Turntogy Nyob Rau Hauv Siab Txias (xav tau kom withstand cuam tshuam loads)
Tsheb thauj mus los: Kev ceev ceev cov ciav hlau Bogie, lub tsheb hnyav chassis weldments
Cov tub rog tshwj xeeb: cov kabmob-cov kabmob ntawm cov cuab yeej tshawb fawb tshawb fawb, lub siab tiv thaiv cov lus hu rau kev ua kom tob
4. Cov ntsiab lus tseem ceeb hauv kev kho cua sov thiab kev ua
Q: Yuav ua li cas thiaj zoo kho cov cua sov thiab kev ua haujlwm ntawm 4615 tus yeeb nkab steel? A:
Cov txheej txheem pom zoo ua ke:
Vuam: Siv ER80S-Ni1 Vuam hlau, Preheat ntawm 100-150 degree, thiab dehydogenate ntawm 620℃rau 2 teev tom qab vuam.
Kev kho cua sov: Dual-theem quenching (800℃rau 1 teev → roj kub (300℃rau 1 teev → 600℃rau 2 teev).
Machining: Siv Ticn-Coated cuab yeej, txiav ceev 100-120 m / min.
Kev tswj tseem ceeb: zam kev npau taws mus rau qhov npau taws ua rau lub siab mus rau 350-550 degree. Rau tuab-walled ntu, tswj tus nqi cua txias tsawg dua lossis sib npaug rau 20℃/ s.
5. Piv nrog cov ntaub ntawv zoo sib xws
Q: Dab tsi yog qhov sib txawv ntawm 4615 thiab {8620} thiab 4330 steel kav? A:
vs . 8620}}: 4615 muaj cov ntsiab lus npib tsib xee (1.65 %%}}
VS . 4330}}: 4615 muaj cov ntsiab lus me me (0.1333%-{% - 0.33%), ua rau muaj kev weldability zoo dua tab sis 30% qis zog.
Cov ntawv thov uas nws tsis tuaj yeem hloov:
▶ txwv tsis pub hloov tawm los ntawm hloov 9% Ni steel nyob rau hauv -196℃cryogenic ntim.
▶ txwv tsis pub hloov kho hy-80 steel hauv kev ua rog cov qauv qauv.
