Lub zog siab, kev hnav tsis kam thiab kev tiv thaiv corrosion electroslag 9Cr18 puag ncig hlau

9Cr18 electroslag puag ncig hlau yog cov hlau tsis xeb martensitic uas muaj cov pa roj carbon ntau, cov chromium siab uas ua tau raws li tus qauv tub rog hauv tebchaws GJB2294-95. Nws yog smelted siv cov txheej txheem electroslag remelting (ESR). Cov txheej txheem no txhim kho cov khoom siv qhov huv si, kev sib xws ntawm cov qauv, thiab tag nrho cov khoom siv kho tshuab, ua rau nws yog cov khoom siv zoo tshaj plaws rau kev tsim cov khoom siv thauj khoom siab, kev xeb siab, thiab cov khoom siv tiv taus hnav siab. Nws cov tshuaj lom neeg muaj pes tsawg leeg ua tau raws li cov qauv xav tau:

1. Kev ua kom tawv thiab ua haujlwm zoo heev

Tom qab kev kho cua sov (quenching ua raws li qhov kub qis tempering), qhov nyuaj tuaj yeem ncav cuag ≥55HRC thaum tseem khaws cia qhov muaj zog siab. Cov ntsiab lus carbon siab thiab chromium carbides (xws li Cr₂₃C₆) tau faib sib npaug thoob plaws hauv martensite matrix, muab kev tiv thaiv zoo heev thiab ua rau nws haum rau kev ua haujlwm siab.

2. Kev tiv thaiv xeb zoo heev

Cov ntsiab lus chromium siab txog li 17% ~ 19%, tsim cov zaj duab xis oxide ntom ntom ntawm qhov chaw, uas ua rau nws muaj kev tiv thaiv corrosion zoo hauv huab cua noo, dej hiav txwv thiab cov kua qaub tsis muaj zog, uas zoo dua li cov hlau carbon ib txwm thiab cov hlau tsis tshua muaj hlau.

3. Kev txhim kho cov nyhuv ntawm cov txheej txheem electroslag remelting

Kev huv siab: Kev rov ua dua electroslag tshem tawm cov oxide inclusions (xws li Al₂O₃, SiO₂) thiab cov pa roj impurities, txo cov qhov tsis zoo, thiab txhim kho lub neej ntawm cov khoom siv qaug zog.

Kev sib npaug ntawm cov qauv me me: Cov txheej txheem ESR txhim kho qhov kev faib tawm ntawm carbide, txo cov kev sib cais ntawm eutectic carbide, zam kev ntxhov siab, thiab txhim kho cov khoom siv kho tshuab sab nraud thiab kev ua haujlwm ntseeg tau.

Kev siv tshuab tau zoo dua: Cov qauv huv si thiab sib xws txo qhov kev nyiam txiav thiab lo, ua rau nws yooj yim dua rau kev ua haujlwm raug thiab kev kho qhov chaw.

4. Lub zog siab thiab qaug zog lub neej

Lub zog tensile tuaj yeem ncav cuag ≥590 MPa, thiab qhov elongation ≥15% (annealed). Tom qab quenching thiab tempering, lub zog ntxiv nce ntxiv. Tib lub sijhawm, lub neej qaug zog ntawm electroslag hlau ntev dua li ntawm cov khoom siv smelted ib txwm muaj, ua rau nws tsim nyog rau cov khoom uas raug cyclic loads.

Nrog nws cov kev ua tau zoo, 9Cr18 electroslag puag ncig hlau yog siv dav hauv kev tsim khoom siv siab kawg:

Tub Rog thiab Aerospace: Ua raws li tus qauv GJB2294-95 thiab siv los tsim cov khoom siv tiv taus corrosion xws li bearings, shafts, thiab missile structural parts.

Kev tsim khoom siv tshuab: cov iav thauj khoom siab, cov twj tso kua mis thiab cov li qub, cov cuab yeej phais, cov riam thiab cov caij nplooj ntoos hlav, thiab lwm yam.

Kev Lag Luam Zog thiab Tshuaj: Haum rau cov khoom siv tiv taus hnav hauv dej hiav txwv lossis cov xov xwm corrosive, xws li cov twj tso kua mis nkoj thiab cov khoom siv tshuaj lom neeg.

Electroslag 9Cr18 hlau puag ncig, ua raws li tus qauv GJB2294-95, ua tiav kev txhim kho tag nrho hauv kev huv, kev sib xws ntawm cov qauv, thiab cov khoom siv kho tshuab los ntawm cov txheej txheem electroslag remelting. Nws ua ke qhov nyuaj siab, kev tiv thaiv kev hnav, kev tiv thaiv corrosion, thiab lub neej ntev nkees. Nws qhov kev ntseeg tau raug txheeb xyuas zoo hauv cov tub rog, aerospace, thiab cov tshuab siab kawg, ua rau nws yog cov khoom siv zoo tshaj plaws rau kev tsim cov khoom siv ua haujlwm siab, lub neej ntev.