ASTM B670-07(2018) yog Standard Specification for Precipitation-Hardening Nickel Alloy (UNS N07718) Plate, Sheet, and Strip for High-Temperature Service. ASTM B670 UNS N07718 yog lub zog siab, corrosion-resistant, thiab tshav kub-resistant alloy, Inconel 718 siv nyob rau hauv daim ntaub ntawv uas yuav tsum tau zoo heev mechanical zog thiab kuj mus rau high-kub ib puag ncig.
Nov yog qee cov khoom tseem ceeb thiab cov yam ntxwv ntawm ASTM B670 UNS N07718:
1. Lub zog muaj zog: Inconel alloy 718, raws li tau teev tseg hauv ASTM B670, nthuav tawm lub zog tensile thiab tawm los, ua rau nws tsim nyog rau cov ntawv thov uas lub zog thiab kev ntseeg siab yog qhov tseem ceeb.
2. Corrosion Resistance: Cov nickel alloy 718 no muaj kev tiv thaiv zoo heev rau corrosion, nrog rau kev tiv thaiv pitting, crevice corrosion, thiab kev nyuaj siab corrosion cracking (SCC). Nws yog feem ntau siv nyob rau hauv ib puag ncig hnyav, nrog rau kev siv marine thiab aerospace.
3. High-Temperature Performance: ASTM B670 UNS N07718 daim hlau thiab cov ntawv tuav lawv cov khoom siv kho mob ntawm qhov kub siab. Nws muaj peev xwm tiv taus qhov kub thiab txias xws li cov xwm txheej cryogenic mus txog 704 degree (1,300 degree F), ua rau nws zoo tagnrho rau cov ntawv thov uas muaj qhov kub thiab txias.
4. Fatigue Resistance: Nickel Inconel 718 nthuav tawm kev qaug zog zoo, uas yog qhov tseem ceeb hauv cov ntawv thov raug rau kev thauj khoom thiab kev ntxhov siab, xws li roj turbine xyaw thiab cov khoom siv hauv aerospace.
5. Weldability: UNS N07718 tuaj yeem nkag tau yooj yim welded siv cov txheej txheem vuam, txawm hais tias tom qab vuam cov cua sov feem ntau yuav tsum tau ua kom nws tag nrho lub zog thiab corrosion kuj.
6. Creep Resistance: Inconel 718 phaj qhia tau zoo heev creep tsis kam, ua rau nws haum rau siv nyob rau hauv cov ntaub ntawv uas yuav raug rau lub sij hawm ntev kev ntxhov siab nyob rau hauv high kub.
7. Chemical Compatibility: 2.4668 Inconel 718 yog sib xws nrog ntau yam tshuaj thiab feem ntau siv rau hauv cov khoom siv tshuaj.
8. Dimensional Stability: ASTM B670 UNS N07718 daim hlau thiab cov ntawv txheeb xyuas qhov ruaj khov txawm tias nyob rau hauv qhov kub thiab txias.
Nco ntsoov tias cov cuab yeej tshwj xeeb thiab lub cev muaj peev xwm sib txawv nyob ntawm cov yam ntxwv xws li kev kho cua sov, kev tsim khoom, thiab cov ntawv thov tshwj xeeb. Yog li ntawd, nws yog ib qho tseem ceeb uas yuav tsum tau xa mus rau ASTM B670 specification thiab sab laj nrog cov khoom engineers los yog lwm tus neeg rau cov ncauj lus kom ntxaws txog cov khoom ntawm Inconel 718 raws li ASTM B670.
