1. Cov khoom txhais thiab cov khoom tseem ceeb
Q: Dab tsi yog ovm 519 4024 cov yeeb nkab?
A:
4024 cov yeeb nkab steel yog ib qho nruab nrab cov pa roj carbon manganese steel seamless yeeb (tsis yog G40240) teev nyob rau hauv Astm ATTM A519 tus qauv. Nws cov tub ntxhais muaj pes tsawg leeg yog 0.20% -0.28% carbon thiab 1.35% -1.65% manganese. Los ntawm kev ua kom meej rau mangorganic ntxiv dag zog tsim (MN / C ≈ ≈) Qhov kev sib npaug ntawm cov khoom siv tsis zoo thiab ua rau haum rau cov xwm txheej ua kom tawv. Tom qab quenching, nws cov tawv tawv muaj peev xwm ncav cuag HRC 55-60, thaum tswj kom zoo heev hauv cov tub ntxhais.
2. Cov Khoom Siv Cov Neeg Kho Tshuab thiab Cov Lus Qhia
Q: Cov yam ntxwv kev ua tau zoo ntawm 4024 cov yeeb nkab steel?
A:
Hauv lub xeev kub-dov, cov khoom siv tau ntawm 4024 steel muaj xws li 520 mpa, kom muaj zog ntxiv rau ntau dua lossis sib luag dua li 18%. Tom qab quenching thiab tempering (850℃roj quenching {}}℃tau mus txog 900-1100 MPa, nrog kev cuam tshuam lub zog loj dua los yog sib npaug rau 35j (ntawm -20 degree). Nws cov kev sib cav muaj zog dag zog (10⁷ musn) yog kwv yees li 40% ntawm lub zog tensile, zoo dua li qub cov roj carbon steel.
3. Cov ntawv thov raug
Q: Cov ntaub ntawv thov ntawm 4024 steel yog dab tsi?
A:
Kev Sib Kis Ib Lub Tshuab Tshaj: Tsis tas li cov twj sib koom ua ke sab nrauv ib ncig, sib kis cov suab synchron
Kev Siv Machinery: Excavator Sleing Rings, Cov Tsev Tsav Tsheb Tsav Hydraulic
Tsheb thauj mus los: Tsheb nqaj hlau qag zog, Bogie Pins
Tuam Raug: Laum Chuck Lub Cev, Stamping Tuag Cov Lus Qhia
4. Cov ncauj lus kom ntxaws piav qhia txog cov txheej txheem kev kho cua sov
Q: Yuav ua li cas tuaj yeem ua tiav kev kho cua sov rau 4024 cov yeeb nkab steel tau ua kom zoo? A:
Peb pom zoo kom muaj carburizing sib xyaw ua ke thiab tau qhab nia quenching txheej txheem:
Roj carburizing (930 qib rau 6 teev, rooj plaub qhov tob 0.8-1.2mm)
GRADED Quenching (OsotherMal Ntsev da dej ntawm 300℃rau 3 feeb, ua raws li los ntawm huab cua txias)
Tsawg-kub tempering (kev nyuaj siab nyem ntawm 180℃rau 2 teev)
Tus txheej txheem no tuaj yeem ua tiav qhov kev nyuaj ntawm HRC 58-62 thiab ib qho kev ua tub ntxhais tawv tawv ntawm HRC 30-35, kev tiv thaiv zoo quenching deformation thiab tawg.
5. Cov ntsiab lus tseem ceeb hauv kev ua thiab tswj hwm zoo
Q: Cov ntsiab lus tseem ceeb kom nco ntsoov thaum twg ua 4024 yeeb nkab?
A:
Cov yam ntxwv ua:
Txog kev tig, peb pom zoo kom siv tialn-coated cov cuab yeej ntawm kev txiav ceev ntawm 80-100 m / min.
Rau vuam, preheat rau 200-250 degree. ER80S-D2 Helrogen-hydrogen Vuam Hlau yog pom zoo.
Kev tswj kom tsim nyog:
100% Ultrasonic Qhov Ntsuas Uljecture (ASTM E213 Chav Kawm B)
Carburized txheej tradient kev sim (microhardness txoj kev kuaj, qhov hloov chaw nyob ntawm nqes hav thiab sib npaug rau 50 hv / 0.1 hli)
Grain loj tswj (ttm qib 5-8, tsis muaj cov nplej sib xyaw)
6. Piv nrog cov ntaub ntawv zoo sib xws
Q: Dab tsi yog qhov sib txawv ntawm 4024, 4027, thiab 8620 steel yeeb nkab? A:
vs . 4027}: 4024 muaj ib qho ntsiab lus me ntsis roj carbon monoxide (0.20% -0.28% vs {% - 0.30%), ua rau muaj kev nyab xeeb loj dua tab sis me ntsis qis weldability tab sis me ntsis qis dua weldability tab sis me ntsis qis dua weldability tab sis me ntsis qis dua weldability tab sis me ntsis qis dua weldability tab sis me ntsis qis dua weldability tab sis me ntsis qis zog coj kev coj tsis kam.
VS . 8620}: 4024 muaj tsis muaj npib tsib xee-chromium alloys, tab sis cov tub ntxhais muaj zog, tab sis yog lub zog yog 15% qis dua.
Tsis tuaj yeem hloov chaw scararios:
▶ yuav hloov tsis tau 9310 rau cov vaj zog aviation av.
▶ Tsis pom zoo raws li hloov pauv rau 4320 hauv cov khoom siv hnyav-khoom siv.
