1.4550 Stainless hlau yog dab tsi?

1.4550 stainless hlau, feem ntau hu ua 347 lossis UNS S34700, yog niobium (columbium) -stabilized austenitic stainless hlau. Zoo ib yam li 321, nws yog tsim los tiv thaiv intergranular corrosion tom qab raug kub, tab sis siv niobium es tsis txhob titanium ua lub stabilizing lub caij. Qib no yog tshwj xeeb tshaj yog muaj nuj nqis rau nws zoo heev - kub cov khoom thiab feem ntau yog siv nyob rau hauv welded los ua ke, aircraft Cheebtsam, thiab siab -kub industrial khoom.

 

Qhov no niobium- qib ruaj khov yog tus qauv raws li cov txheej txheem thoob ntiaj teb loj.

Txuj	Qib sib npaug
EN (Tebchaws Europe)	1.4550
ASTM / AISI (USA)	347, UA 34700
JIS (Nyiv)	SUS 347
KS (Korea)	STS 347

Niobium (Nb) yog qhov tseem ceeb stabilizing lub hauv paus ntawm nws cov khoom.

Lub ntsiab	C	Si	Mn	P	S	Cr	Ni	Nb
Cov ntsiab lus (%)	Tsawg dua los yog sib npaug li 0.08	Tsawg dua los yog sib npaug rau 1.0	Tsawg dua lossis sib npaug li 2.0	Tsawg dua lossis sib npaug li 0.045	Tsawg dua los yog sib npaug li 0.03	17.0 - 19.0	9.0 - 12.0	Ntau dua lossis sib npaug li 10xC

Nws muab zoo zog thiab ductility nyob rau hauv ib tug ntau yam ntawm kub.

Khoom	Yield zog (Rp0.2)	Tensile zog (Rm)	Elongation (A)	Hardness (HB)
Tus nqi	Ntau dua lossis sib npaug li 205 MPa	500 - 750 MPa	Ntau dua lossis sib npaug li 40%	Tsawg dua lossis sib npaug li 215

 

Cov yam ntxwv tseem ceeb thiab kev siv ntawm 1.4550 / 347

Intergranular Corrosion kuj:Niobium tsim cov carbide ruaj khov, tiv thaiv chromium depletion ntawm cov ciam teb thaum lub sij hawm raug kub ntawm 450-850 degree, ua rau nws resistant rau rhiab heev.

Zoo Siab -Tsub Muaj Zog:Ua kom muaj kev nkag siab zoo thiab kev ntxhov siab tawg lub zog ntawm qhov kub siab, haum rau kev pabcuam txuas mus txog li 870 degree.

Weldability zoo heev:Yuav tau welded siv txhua txoj kev uas tsis muaj kev kho cua sov tom qab, ua rau nws zoo tagnrho rau fabricated siab - qhov kub thiab txias Cheebtsam.

 

Cov ntawv thov tseem ceeb:

Aerospace:Jet engine Cheebtsam, afterburner qhov chaw, thiab siab -kub fasteners.

Kev ua tshuaj lom neeg:Welded cov hlab ntsha, cov khoom siv hluav taws xob sib hloov, thiab cov kav dej uas ua haujlwm ntawm qhov kub siab.

Kev tsim hluav taws xob:Superheater raj, boiler Cheebtsam, thiab turbine qhov chaw.

Cov khoom siv kho cua sov:Retorts, muffles, thiab radiant tubes.

 

Dab tsi yog qhov txawv ntawm 347 (1.4550) thiab 321 (1.4541) stainless hlau?
Ob leeg yog cov qib ruaj khov, tab sis lawv siv cov khoom sib txawv: 347 siv niobium (Nb), thaum 321 siv titanium (Ti). Niobium-stabilized 347 feem ntau muaj qhov zoo dua siab dua - qhov kub thiab txias thiab feem ntau nyiam rau qhov hnyav welded vim tias niobium carbides tsis tshua muaj kev sib cais lossis oxidize thaum vuam dua li titanium carbides. 321 tej zaum yuav raug xaiv rau nws qhov zoo me ntsis formability nyob rau hauv tej yam kev siv txias -

 

Vim li cas 347 stainless hlau feem ntau siv hauv kev siv aerospace?
Qib 347 tau txais kev pom zoo hauv aerospace vim nws qhov kev ua tau zoo nyob rau hauv siab - kub, siab - ib puag ncig kev ntxhov siab. Nws txoj kev ruaj khov muab kev tiv thaiv zoo ib yam rau intergranular corrosion tom qab lub sijhawm ntev ntawm kev ua haujlwm kub, thiab nws lub zog nkag tau zoo ua rau nws tsim nyog rau cov khoom xws li cov tshuab tso pa, lub cav mounts, thiab thermal tiv thaiv tshuab qhov twg lub zog thiab corrosion kuj tseem ceeb heev.

 

 

Nrhiav kev ntseeg siab ntawm 1.4550 / 347 Stainless Hlau?
GNEE Steel muab cov khoom siv siab- zoo 347 (1.4550) stainless hlau hauv phaj, ntawv, yeeb nkab, thiab bar cov ntaub ntawv rau siab - kub thiab corrosion- daim ntaub ntawv tiv taus. Peb muab tag nrho cov ntaub ntawv pov thawj thiab kev txhawb nqa. Yog tias koj muaj kev xav tau, thov koj xav tiv tauj peb.