Kev tswj ntawm stainless hlau intergranular corrosion, 304 stainless hlau, 304 stainless hlau xeb thiab corrosion nyob rau hauv stainless hlau intergranular corrosion nyob rau hauv ib co 10%, nws yuav ua rau cov adhesion ntawm nplej tau poob, nyob rau hauv lub xub ntiag ntawm kev nyuaj siab, heev yooj yim rau tawg, txawm crumple , thiab muab zais, tsis pom los ntawm nws cov duab. Nws kuj yog induced los ntawm lwm yam tseem ceeb ua rau corrosion. Intergranular corrosion ntawm austenitic stainless hlau tshwm sim los ntawm kev txom nyem feem ntau yog vim grain ciam teb Cr, Cr thiab c yooj yim daim ntawv tshuaj sib txuas, cov ntsiab lus Cr.
1, tshuaj muaj pes tsawg leeg thiab cov qauv
(1) C cov ntsiab lus
C cov ntsiab lus ntawm steel nyhuv ntawm intergranular corrosion ntawm austenitic stainless hlau yog qhov tseem ceeb tshaj plaws. Ntawm ib sab, nruj me ntsis tswj c thiab khaws cov ntsiab lus carbon hauv lub hauv paus hlau thiab vuam pas nrig ntawm 0.08%, ntawm lub hauv paus hlau thiab cov khoom siv vuam ntxiv stabilizer cov ntsiab lus ntawm Ti, Nb, muaj zog affinity nrog c, carbon ua ntej Cr khi, ua kom ruaj khov. compound.
(2) dual theem qauv
Dual theem qauv yuav ua rau kom muaj peev xwm ntawm kev tiv thaiv intergranular corrosion. Ntawm ib sab tes, koom nrog ferrite tsim cov ntsiab lus, xws li chromium, Silicon, txhuas, molybdenum, vuam tsim ntawm ob theem qauv, ntawm tus neeg xaiv tsim muaj ferrite ntau vuam cov ntaub ntawv.
2, vuam technology
(1) qhov kub ntawm 450 ~ 850 ℃ qhov kub ntau, tshwj xeeb tshaj yog nyob rau ntawm 650 ° c yog yooj yim tshaj generated intergranular corrosion txaus ntshai kub cheeb tsam (tseem hu ua kub cheeb tsam-sensitive). Stainless hlau welding, welds tuaj yeem raug coj mus rau hauv laminate, los yog ncaj qha rau hauv qab dej txias ntawm lub vuam, kom txias sai, txo lub sij hawm hauv qhov kub thiab txias, yog cov kev ntsuas zoo rau kev txhim kho corrosion ntawm cov pob qij txha.
(2) nce ntawm vuam kab zog, yuav ceev corrosion ntawm austenitic stainless hlau. Thaum lub sij hawm vuam txheej txheem, uas tsis tshua muaj tam sim no, siab vuam ceev, luv-arc, ntau dhau welding txoj kev, thiab txo cov cua sov. Tsawg tshav kub input, los ntawm txoj kev sensitizing kub sai txaus kom tsis txhob intergranular corrosion ntawm tshav kub cuam tshuam cheeb tsam.
Post lub sij hawm: Mar-12-2018