1.4541 Stainless hlau yog dab tsi?

1.4541 stainless hlau, feem ntau hu ua 321 los yog UNS S32100, yog titanium-stabilized austenitic stainless hlau tsim rau cov ntawv thov uas yuav tsum tau zoo heev tiv thaiv intergranular corrosion tom qab raug kub siab. Qhov sib ntxiv ntawm titanium tiv thaiv chromium carbide tsim ntawm cov ciam teb thaum lub sij hawm vuam los yog kev pab cuam nyob rau hauv lub 450-850℃ntau yam, ua rau nws tshwj xeeb tshaj yog haum rau high-temperature daim ntaub ntawv uas tus qauv 304 yuav raug rau sensitization. Nws yog dav siv nyob rau hauv dav hlau cua tshuab, cua sov exchangers, expansion pob qij txha, thiab lwm yam Cheebtsam ua hauj lwm nyob rau hauv siab kub.

 

Qhov qib austenitic ruaj khov no yog tus qauv raws li cov txheej txheem thoob ntiaj teb tseem ceeb.

Txuj	Qib sib npaug
EN (Tebchaws Europe)	1.4541
ASTM / AISI (USA)	321, UAS S32100
JIS (Nyiv)	SUS 321
KS (Korea)	STS 321
Lub Npe	321

Titanium yog ntxiv ntawm kwv yees li tsib npaug ntawm cov ntsiab lus ntawm cov pa roj carbon monoxide kom ua tiav kev ruaj khov.

Lub ntsiab	C	Si	Mn	P	S	Cr	Ni	Ti
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 5xC

Nws tuav cov khoom zoo txhua yam thoob plaws ntau qhov kub thiab txias.

Khoom	Yield zog (Rp0.2)	Tensile zog (Rm)	Elongation (A)	Hardness (HB)
Tus nqi zoo (Room Temp)	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 1.4541 / 321

Intergranular Corrosion kuj:Titanium khi nrog cov pa roj carbon zoo dua, tiv thaiv chromium depletion ntawm cov ciam teb nplej thiab muab kev tiv thaiv nyob rau hauv qhov kub thiab txias ntau yam (450-850 degree), ua rau nws zoo tagnrho rau welded sib dhos thiab kev pabcuam kub.

Zoo Siab -Tsub Muaj Zog:Tuav oxidation tsis kam thiab lub zog ntawm qhov kub thiab txias, haum rau kev siv tsis tu ncua txog li 900℃thiab txuas ntxiv mus txog 850 degree.

Zoo heev Formability thiab Weldability:Muaj qhov zoo ductility thiab tuaj yeem welded los ntawm txhua txoj hauv kev yam tsis tas yuav tsum tau ua tom qab -weld heat treatment nyob rau hauv ntau daim ntawv thov.

Creep Resistance:Muaj kev nkag siab zoo ntawm qhov kub siab, ua rau nws haum rau ntev - lub sij hawm siab - qhov kub thiab txias.

 

Cov ntawv thov tseem ceeb:

Aerospace:Lub dav hlau lub cav tso tawm Cheebtsam, afterburner qhov chaw, thermal shields, thiab ducting.

Thaum tshav kub kub ua:Thaum tshav kub kub exchanger tubing, qhov cub qhov cub, thermocouple sheaths, thiab radiant tubes.

Kev lag luam tshuaj:Cov nkoj thiab cov kav dej raug corrosive media ntawm qhov kub siab.

Automotive:Exhaust systems, catalytic converter vaj tsev, thiab manifold Cheebtsam.

Kev tsim hluav taws xob:Superheater raj thiab boiler Cheebtsam.

Kev ua zaub mov:Cov cuab yeej siv siab -kub kom tsis muaj menyuam.

 

Dab tsi yog qhov txiaj ntsig tseem ceeb ntawm kev siv 321 (1.4541) tshaj 304 (1.4301) rau welded thiab siab -kev siv kub?
Lub ntsiab kom zoo dua yog nws tsis kam mus rau rhiab heev. Thaum tus qauv 304 yog welded los yog raug kub nyob rau hauv 450-850℃ntau yam, lub tshav kub- cuam tshuam cheeb tsam tuaj yeem ntsib chromium carbide nag lossis daus, ua rau chromium depletion ntawm cov ciam teb nplej thiab ua rau cov khoom raug cuam tshuam rau intergranular corrosion. Lub titanium nyob rau hauv 321 cov ntaub ntawv ruaj khov titanium carbides es tsis txhob, tawm hauv chromium nyob rau hauv cov khoom tov kom muaj corrosion kuj. Qhov no ua rau 321 superior rau welded sib dhos uas tsis tuaj yeem tom qab vuam annealed, nrog rau cov khoom siv uas yuav ua haujlwm hauv qhov kub thiab txias.

 

Qhov txawv ntawm 321 (1.4541) thiab 321H (1.4878) yog dab tsi?
321H yog qhov siab -carbon variant ntawm 321, nrog rau cov pa roj carbon monoxide tswj ntawm 0.04-0.10% (vs. Tsawg dua lossis sib npaug li 0.08% rau tus qauv 321). Cov ntsiab lus carbon siab dua no muab kev txhim kho kev nkag siab thiab kev ntxhov siab rupture tsis kam ntawm qhov kub siab tshaj 500℃. 321H yog tshwj xeeb tsim rau siab - qhov kub thiab txias cov qauv siv hauv cov hlab ntsha siab xws li ASME, qhov uas tau lees paub cov ntsiab lus carbon tsawg kawg ua kom paub tseeb ntev - lub sijhawm ua haujlwm. Standard 321 yog haum rau kev siv dav dav -lub hom phiaj daim ntawv thov uas qhov kub-kub lub zog tsis tshua muaj qhov tseem ceeb, thaum 321H yog qhov nyiam rau qhov ntsuas kub siab uas xav tau qhov siab tshaj plaws nkag siab.

 

Dab tsi yog qhov kev txiav txim siab vuam rau 321?
321 muaj qhov zoo tshaj plaws weldability siv txhua txoj hauv kev xws li TIG, MIG, SMAW, thiab SAW. Cov ntsiab lus tseem ceeb suav nrog:

Muab cov hlau sib xyaw ua ke (ER321 rau TIG / MIG) tau pom zoo kom muaj kev tiv thaiv corrosion

Tsis muaj kev tshaj tawm -weld cua sov yuav tsum tau kho vim titanium stabilization

Pom zoo cua sov input: 0.5-2.0 kJ / mm

Interpass kub yuav tsum khaws cia qis dua 150 degree

Tiv thaiv roj (argon lossis argon nrog 2-5% nitrogen) tiv thaiv lub pas dej ua ke

Tshaj tawm -welding tu thiab pickling / passivation yog pom zoo rau qhov zoo tshaj plaws corrosion kuj

 

Nrhiav kev ntseeg siab ntawm 1.4541 / 321 Stainless Hlau?
GNEE Steel muab cov khoom siv siab- zoo 321 (1.4541) stainless hlau hauv phaj, ntawv, yeeb nkab, raj, bar, thiab cov ntaub ntawv haum, zoo tagnrho rau siab - kub thiab corrosion- resistant welded daim ntaub ntawv. Peb muab cov ntaub ntawv pov thawj tag nrho (EN 10204 3.1) thiab cov kev pabcuam ua tiav nrog rau kev txiav, khoov, sib sau, thiab vuam. Yog tias koj muaj kev xav tau, thov koj xav tiv tauj peb.