4340 steel yog ib qho tsis tshua muaj alloy ultra-siab zog steel. Tsuas yog cov hlau uas muaj lub zog tensile ntau dua 1400MPa thiab lub zog tawm los ntau dua 1200MPa ntawm chav tsev kub yog hu ua "ultra siab zog steel". 4340 steel yog ib tug neeg sawv cev ntawm ultra-siab zog steel, uas yog tau los ntawm kev kho cua sov.
Cov tshuaj muaj pes tsawg leeg ntawm 4340 alloy steel yog raws li nram no:
- Cov ntsiab lus carbon: 0.38-0.43 feem pua
-Silicon cov ntsiab lus: 0.15-0.35 feem pua
-Manganese cov ntsiab lus: 0 60-0.80 feem pua
- Phosphorus cov ntsiab lus: Tsawg dua lossis sib npaug rau 0.035 feem pua
-Sulfur cov ntsiab lus: Tsawg dua lossis sib npaug rau 0.040 feem pua
-Chromium cov ntsiab lus: 0.70-0.90 feem pua
-Nickel cov ntsiab lus: 1.65-2 00 feem pua
-Molybdenum cov ntsiab lus: 0 20-0.30 feem pua
4340 alloy steel muaj cov khoom siv zoo heev, nrog lub zog tensile ntawm tshaj 1200 MPa, lub zog tawm ntawm 1000 MPa, thiab elongation ntawm ntau dua 12 feem pua. Tsis tas li ntawd, nws kuj muaj zog qaug zog zoo thiab toughness, thiab tuaj yeem tswj kev ua haujlwm ruaj khov nyob rau hauv siab loads thiab siab loads.
Nta:
4340 alloy steel muaj lub zog siab, toughness, thiab kev ruaj ntseg zoo heev hauv quenching thiab tshav kub tsis kam, tab sis cov pob dawb yog rhiab heev thiab muaj keeb kwm nkig. Lub vuam tsis zoo thiab raug kub siab ua ntej vuam. Tom qab vuam, nws yog ib qho tsim nyog los txo qhov siab. Feem ntau, nws yog siv tom qab zoo.
Siv:
4340 alloy steel yog siv los tsim cov khoom tseem ceeb uas yuav tsum tau ua kom muaj zog zoo, siab zog, thiab qhov loj me, xws li shafts rau cov cav tov siab, rotor shafts nrog txoj kab uas hla ntawm 250mm, nyoob hoom qav taub rotor shafts, thiab turbine shafts, hniav, siab. load Cheebtsam, thiab crankshaft fasteners rau turbojet cav. Nws kuj tseem siv tau los ua haujlwm rotor shafts thiab cov hniav nrog qhov kub siab tshaj 400 degree C; Nws tseem tuaj yeem raug tua los tsim cov khoom tseem ceeb nrog rau kev ua haujlwm tshwj xeeb.
