EN 10297 X2CrNiMo18-14-3 yog dab tsi?
X2CrNiMo18-14-3 yog qis-carbon, molybdenum-cov kabmob austenitic stainless hlau seamless raj qib tus qauv raws li EN 10297 tsev neeg rau cov tshuab thiab engineering raj. Nws cov ntsiab lus ntau dua chromium thiab npib tsib xee tso nws siab tshaj tus qauv 18-8 molybdenum qib, muab kev tiv thaiv zoo rau pitting, crevice nres thiab chloride-induced stress corrosion cracking.
Tus lej hlau yog 1.4435 thiab qhov ze tshaj UNS lub npe yog S31603, qis- carbon molybdenum austenitic qib. Kev sib xyaw ua ke ntawm cov pa roj carbon tsawg thiab sib npaug ntawm cov chromium, npib tsib xee thiab molybdenum ua rau qib tshwj xeeb ruaj khov hauv kev tawm tsam hnyav thiab nyob rau qhov kub siab, uas yog vim li cas nws yog ib qho kev xaiv rau kev tu cev, dej hiav txwv thiab cov txheej txheem tshuaj.
Tshuaj muaj pes tsawg leeg
| Element | Cov ntsiab lus % | Muaj nuj nqi |
|---|---|---|
| Cov pa roj carbon | 0.030 max | Tsawg carbon tsis txhob hnov qab txog welds |
| Silicon | max 1.00 Nws | Deoxidation thaum melting |
| Manganese | max 2.00 Nws | Austenite stability, sulfur tswj |
| Phosphorus | 0.045 max | Residual element, capped |
| Sulfur | 0.015 max rau kev txhim kho qib | Residual element, capped |
| Chromium | 17.00 – 19.00 dr hab | Passive zaj duab xis tsim |
| Nickel | 12.50 – 15.00 dr hab | Austenite stability thiab toughness |
| Molybdenum | 2.50-3.00 Nws | Pitting thiab crevice corrosion kuj |
| Nitrogen | 0.10 max | Kev pab txhawb zog |
Cov nickel ntau dua ntawm 18-14-3 variant distinguishes nws los ntawm ntau paub 17-12-2 muaj pes tsawg leeg. Cov npib tsib xee ntxiv txhim kho theem kev ruaj ntseg thiab txo qis kev pheej hmoo ntawm deformation-induced martensite thaum lub sij hawm txias txias los yog machining, uas tseem ceeb rau nyias-wall raj uas yog khoov los yog flared nyob rau hauv kev pab cuam.
Mechanical Properties nyob rau hauv Annealed Condition
| Khoom | Tus nqi |
|---|---|
| Tensile zog Rm | 500 txog 700 MPa |
| 0.2% pov thawj kev nyuaj siab Rp0.2 | 200 MPa yam tsawg kawg nkaus |
| Elongation A | 40% yam tsawg kawg nkaus |
| Hardness | 215 HB max |
| Modulus ntawm elasticity | 200 GPa ntawm chav tsev kub |
Cov txiaj ntsig no siv rau cov raj hauv cov tshuaj annealed thiab pickled mob, uas yog lub xeev tus me nyuam. Kev kos duab txias ua rau cov pov thawj kev ntxhov siab tab sis txo qis elongation, yog li cov raj uas yuav nthuav dav lossis khoov yog txiav txim rau hauv qhov muag muag muag thiab tsim ua ntej yuav txo qis ntxiv.
Corrosion Cwj Pwm thiab Sib piv nrog X2CrNiMo17-12-2
Piv nrog rau cov qauv molybdenum austenitic qib, 18-14-3 muaj pes tsawg leeg muaj qhov sib npaug pitting ntau dua vim tias ob qho tib si chromium thiab molybdenum yog nyob rau sab sauv ntawm lawv qhov ntau. Hauv kev xyaum, qhov no txhais tau tias muaj kev ua siab ntev dua rau cov tshuaj chlorides ua ntej pitting pib, kev ua haujlwm zoo dua hauv oxidising acids xws li nitric acid, thiab txhim kho kev tiv thaiv rau intergranular nres tom qab vuam vim tias cov pa roj carbon ntau yog khaws cia ntawm 0.030% siab tshaj.
Qhov ntxiv molybdenum thiab npib tsib xee kuj txo cov kev nyiam ntawm sigma theem tsim nyob rau hauv 450 mus rau 850 degrees Celsius ntau piv nrog cov qib siab dua -alloy super- austenitic qib, tab sis lub sij hawm raug nyob rau hauv lub band yuav tsum tseem yuav tsum tau zam kom khaws toughness thiab corrosion kuj.
Tej kev siv
Thaum tshav kub kub exchanger thiab condenser tubing nyob rau hauv desalination thiab lub zog tsim
Cov txheej txheem tshuaj piping, reactors thiab cov khoom cia rau cov kua qaub
Pharmaceutical thiab zaub mov ua cov kab uas yuav tsum tau ua kom huv si, corrosion-resistant bore
Offshore thiab subsea instrumentation tubing thiab hydraulic tswj kab
Pulp thiab ntawv bleaching circuits qhov twg chlorides thiab oxidising agents ua ke
Cov khoom siv kho mob thiab phais cov khoom siv uas yuav tsum nyob twj ywm biocompatible thiab huv
Fabrication, Vuam thiab Kev Tswj Xyuas Zoo
Cov qib tau yooj yim welded los ntawm tungsten inert gas, hlau inert roj thiab cov txheej txheem plasma siv qhov sib piv qis -carbon molybdenum muab tub lim. Tsis muaj kev tshaj tawm -weld cua sov yuav tsum tau kho rau cov ntu nyias, tab sis qhov chaw vuam thiab kub cuam tshuam yuav tsum tau ntxuav ntawm oxide thiab hlau paug kom cov yeeb yaj kiab tsis tuaj yeem hloov kho. Interpass kub yuav tsum tau khaws cia qis kom txwv carbide thiab sigma theem nag lossis daus.
Machining tus cwj pwm zoo ib yam li tus qauv molybdenum austenitic qib: ntse carbide tooling, zoo rake geometry thiab dav dav coolant txaus muab lub zoo tshaj plaws cuab tam lub neej vim hais tias cov khoom ua hauj lwm hardens sai. qeeb, hnyav txiav yog nyiam dua lub teeb rov ua dua uas rub lub npoo.
Kev tswj xyuas zoo rau kev xa tawm ib txwm muaj xws li tshuaj ntsuam xyuas ib qho cam khwb cia, kuaj tensile ib batch, flattening los yog dabtsi yog khoov kuaj ntawm lub vuam, hydrostatic kuaj ntawm txhua lub raj rau siab daim ntaub ntawv, thiab eddy tam sim no los yog ultrasonic kuaj ntawm lub raj lub cev. Qhov saum npoo tiav thiab qhov ntev ntev raug txheeb xyuas raws li qhov kev txiav txim, thiab cov ntaub ntawv pov thawj raws li EN 10204 nrog rau qib kev thov.
FAQ
Q: Puas yog X2CrNiMo18-14-3 tib yam li 316L?
Nws yog qhov ze tshaj plaws nyob sab Europe sib npaug. Cov hlau tooj 1.4435 thiab UNS S31603 piav qhia txog qhov qis -carbon molybdenum austenitic stainless hlau, tab sis 18-14-3 version tuav npib tsib xee ntawm qib siab dua li cov ntsiab lus 17-12-2.
Q: Qhov kev pabcuam siab tshaj plaws yog dab tsi?
Kev pabcuam txuas ntxiv yog ib txwm txwv rau li 400 degrees Celsius rau lub luag haujlwm siab. Kev mus ncig luv luv tuaj yeem ua tau, tab sis qhov kub ntawm 450 txog 850 degrees Celsius yuav tsum tau zam kom tsis txhob muaj kev sib tw sigma theem embrittlement.
Q: Yam khoom siv hlau twg yuav tsum siv rau vuam?
Qhov sib piv qis -carbon molybdenum austenitic muab tub lim yog siv rau feem ntau cov pob qij txha. Rau qhov sib txawv ntawm cov pob qij txha rau cov hlau, qhov siab dua - alloy nickel- bearing austenitic muab tub lim txhim kho kev ua siab ntev.
Q: Vim li cas cov ntsiab lus nickel siab dua hauv tus qauv 316L?
Cov nickel siab dua ruaj khov rau cov qauv austenitic, txhim kho qhov tawv thiab txo qhov kev pheej hmoo ntawm martensite tsim thaum ua haujlwm txias, uas yog qhov tseem ceeb rau nyias - phab ntsa raj uas khoov lossis nthuav dav.
Q: Puas yog lub raj puas xav tau kev tshaj tawm -weld cua sov kho?
Tsis yog. Cov tshuaj annealing tom qab vuam yog qhov tsis tsim nyog rau cov ntu nyias thiab nruab nrab vim tias cov ntsiab lus carbon tsawg txaus los tiv thaiv kev puas tsuaj. Cov ntu tuab hauv cov kev pabcuam corrosive yog qee zaum cov tshuaj annealed rau siab tshaj plaws corrosion kuj.
Q: Lub raj tau kuaj ua ntej xa zaub mov li cas?
Kev ntsuas tus qauv suav nrog kev tshuaj xyuas tshuaj lom neeg ib ntus, lub zog tensile ntawm ib pawg, kev tshuaj xyuas qhov ntev, thiab hydrostatic lossis tsis yog -kev ntsuas kev puas tsuaj ntawm lub raj lub cev nyob ntawm qhov kawg siv.
