316Ti vs 316L Austenitic Stainless Steels: Stabilized vs Tsawg-Carbon Corrosion Resistance

 

Dab tsi yog lawv cov ntsiab lus tseem ceeb thiab qhov sib txawv ntawm kev ua haujlwm tseem ceeb?

316Ti khaws 316 lub hauv paus chemistry (16-18% Cr, 10-14% Ni, 2-3% Mo) thiab ntxiv 0.4-0.7% titanium, uas khi cov pa roj carbon monoxide los tsim cov carbides ruaj khov. Qhov no tiv thaiv chromium depletion ntawm grain ciam teb thaum lub sij hawm high - tshav kub raug, khaws cia corrosion kuj nyob rau hauv kub puag ncig.316L txwv carbon rau ≤0.03%, tshem tawm carbide nag lossis daus thaum vuam yam tsis muaj stabilizers. Nws tuav 316's chloride tsis kam, ua rau nws zoo tagnrho rau welded sib dhos nyob rau hauv marine los yog tshuaj chaw.Ob qib muaj ib tug Pitting Resistance Equivalent Number (PREN) ntawm ~ 31, outperforming 304 nyob rau hauv chloride -muaj xov xwm.

Yuav ua li cas lawv stabilization / weldability zoo tau txais txiaj ntsig tshwj xeeb rau kev siv?

316Ti's titanium carbides nyob ruaj khov ntawm 600-800 ° C, yog li nws yog qhov kev xaiv saum toj kawg nkaus rau cov khoom siv hluav taws xob sib hloov, cov khoom siv rau hauv cub tawg, thiab cov catalytic reactor internals hauv cov tshuaj ua cov nroj tsuag.316L qhov qis- carbon tsim txhais tau hais tias nws yuav tsum tsis muaj kev tshaj tawm -weld mandatory kev kho cua sov kom tsis txhob muaj kev kho cua sov loj. seawater pipelines, desalination cog tso tsheb hlau luam, thiab cov khoom siv tshuaj ua haujlwm.Nyob rau hauv cyclic siab -kev pabcuam kub (xws li chav tshuab), 316Ti resists creep deformation zoo dua 316L.

Nyob rau hauv cov xwm txheej twg yog ib qib irreplaceable dua lwm tus?

Xaiv 316Ti rau cov khoom uas raug kub hnyiab tas mus li (≥600 ° C) qhov twg weld kev ncaj ncees thiab ntev - lub sij hawm corrosion kuj tseem ceeb heev -txheej txheem 316L yuav raug kev txom nyem los ntawm grain ciam softening ntawm no.Opt rau 316L rau tej welded sib dhos nyob rau hauv marine, ntug hiav txwv dej, los yog 8} cov nqi tshuaj muaj txiaj ntsig ntau dua low-temperature corrosive settings.

Tus nqi thiab kev tsim khoom lag luam yog dab tsi- tawm ntawm ob qib?

316Ti raug nqi 5–10% ntau dua 316L vim titanium alloying thiab nruj ntau lawm tswj, yog li nws tsuas yog tus nqi - siv tau rau siab - qhov kub thiab txias.316L muaj cov kev xav tau yooj yim dua: nws tau sib xws nrog cov qauv 316L muab tub lim hlau thiab zam rau - cov cua kub nruab nrab{9} (piv txwv li, TIG) los tiv thaiv titanium carbide coarsening, uas tuaj yeem txo qhov toughness.

Cov kev txwv tseem ceeb thiab cov txheej txheem xaiv yog dab tsi?

Cov qib tsis sib xws super austenitic qib (piv txwv li, 254SMO) nyob rau hauv huab cua chloride ib puag ncig- hloov kho dua tshiab yog tias ntsib kub, concentrated brines.Prioritize 316Ti rau siab -kub welded qhov chaw; xaiv 316L rau qis-kub, welded corrosive sib dhos los ua kom zoo dua tus nqi thiab kev ua haujlwm.