1. Stainless hlau thiab stainless acid-resistant steel yog dab tsi?
A: Cov ntsiab lus ntawm cov ntsiab lus tseem ceeb "chromium" hauv cov khoom siv hlau (nickel, molybdenum thiab lwm yam yuav tsum tau ntxiv)
Nws tuaj yeem ua rau cov hlau nyob hauv lub xeev passivated thiab muaj cov yam ntxwv ntawm stainless hlau. Acid-resistant steel yog hais txog cov hlau uas tiv taus corrosion nyob rau hauv muaj zog corrosive media xws li acid, alkali, thiab ntsev.
2. Dab tsi yog austenitic stainless hlau? Cov qhab nia uas nquag siv yog dab tsi?
A: Austenitic stainless hlau yog siv dav thiab muaj ntau yam. zoo li:
<1>{{0}} series: 0Cr19Ni9 (304) 0Cr18Ni8 (308)
〈2〉18-12 series: 00Cr18Ni12Mo2Ti (316L)
<3>{0}} series: 0Cr25Ni13 (309)
<4>{0}} series: 0Cr25Ni20 thiab lwm yam.
3. Vim li cas nws nyuaj rau vuam stainless hlau?
Teb: Cov teeb meem thev naus laus zis tseem ceeb yog:<1>Cov khoom siv stainless hlau muaj zog thermal rhiab heev, thiab lub sij hawm nyob rau hauv qhov kub ntawm 450--850 degree yog me ntsis ntev, thiab corrosion kuj ntawm weld thiab tshav kub-kho cheeb tsam yog heev txo.<2>Thermal tawg yog nquag tshwm sim.<3>Kev tiv thaiv tsis zoo thiab kub kub oxidation loj heev.<4>Lub linear expansion coefficient yog loj, uas ua rau loj vuam deformation.
4. Vim li cas thiaj li yuav tsum ntsuas kev siv tshuab zoo rau kev vuam austenitic stainless hlau?
A: Cov txheej txheem kev ntsuas dav dav yog:<1>Peb yuav tsum nruj me ntsis xaiv cov khoom siv vuam raws li cov tshuaj muaj pes tsawg leeg ntawm lub hauv paus hlau.<2>Me me tam sim no., vuam ceev; cov kab me me zog, txo cov cua sov nkag.<3>Thin-inch welding hlau, electrode, tsis muaj viav vias, ntau txheej multi-pass vuam.<4>Kev quab yuam cua txias ntawm qhov vuam thiab qhov cua sov cuam tshuam rau thaj tsam kom txo tau lub sijhawm nyob ntawm 450-850 degree .<5>Argon roj tiv thaiv nyob rau sab nraum qab ntawm TIG weld.<6>Cov welds nyob rau hauv kev sib cuag nrog corrosive nruab nrab yog welded kawg.<7>Passivation kev kho ntawm welds thiab tshav kub cuam tshuam cheeb tsam.
5. Vim li cas thiaj yuav tsum tau siv 25-13 series ntawm vuam hlau thiab electrodes rau vuam ntawm austenitic stainless hlau, carbon hlau thiab cov hlau tsis tshua muaj hlau (dissimilar steel vuam)?
Teb: Thaum welding austenitic stainless hlau, carbon steel thiab low-alloy steel txuas nrog dissimilar steel welded pob qij txha, 25-13 series ntawm vuam hlau (309, 309L) thiab electrodes (Ao 312, Ao 307, thiab lwm yam) yuav tsum tau siv. rau lub deposited hlau ntawm lub weld. Yog tias lwm cov khoom siv hlau tsis huv siv tau siv, cov qauv martensitic yuav raug tsim los ntawm fusion kab ntawm cov hlau thiab cov hlau tsis tshua muaj hlau, uas yuav ua rau cov kab mob khaub thuas.
6. Vim li cas cov roj shielding ntawm 98 feem pua Ar ntxiv rau 2 feem pua O2 siv rau cov khoom siv stainless hlau vuam hlau?
Teb: Thaum lub sij hawm MIG welding ntawm cov khoom stainless hlau xaim, yog cov roj ntshiab argon siv los tiv thaiv, qhov nro ntawm lub pas dej molten yuav loj, thiab cov vuam seam yuav tsis zoo, thiab nws yuav zoo li " hunchback" weld. Ntxiv 1-2 feem pua ntawm cov pa oxygen kom txo qhov nro ntawm lub pas dej molten, thiab cov vuam seam yog tiaj thiab zoo nkauj.
7. Vim li cas qhov saum npoo ntawm cov khoom hlau stainless hlau MIG weld dub?
Teb: MIG vuam ceev ntawm cov khoom hlau stainless hlau yog ceev ({0}}cm / min), lub shielding gas nozzle tau khiav mus rau pem hauv ntej molten pas dej ua ke, lub weld tseem nyob rau hauv ib tug liab-kub kub kub xeev, oxidized los ntawm huab cua, qhov saum npoo yog oxidized, thiab weld puas lawm. dub. Pickling thiab passivation tuaj yeem tshem tawm cov tawv nqaij dub thiab kho cov xim qub ntawm cov hlau tsis huv.
8. Vim li cas cov hlau tsis muaj steel hlau xav tau lub zog hluav taws xob kom ua tiav lub dav hlau hloov pauv thiab tsis muaj kev sib tsoo?
Teb: Thaum MIG welding khoom stainless hlau xaim, φ1.2 vuam hlau, thaum tam sim no kuv loj dua los yog sib npaug rau 260-280A, tuaj yeem paub dav hlau hloov; tsawg dua tus nqi no, lub droplet yog luv luv-circuit hloov, lub spatter yog loj, thiab feem ntau siv tsis tau. Tsuas yog thaum MIG fais fab mov nrog mem tes siv thiab cov mem tes tam sim no ntau dua 300A, lub mem tes hloov pauv hauv qab vuam tam sim no ntawm 80-260A tuaj yeem paub tsis muaj qhov sib tsoo.
9. Vim li cas lub flux-cored stainless hlau xaim tiv thaiv los ntawm CO2 roj? Tsis muaj lub zog hluav taws xob?
Teb: Tam sim no, feem ntau siv flux-cored stainless hlau vuam hlau (xws li 308, 309, thiab lwm yam), cov mis flux nyob rau hauv vuam hlau yog tsim raws li cov tshuaj metallurgical cov tshuaj tiv thaiv vuam nyob rau hauv kev tiv thaiv ntawm CO2 roj, yog li nws tsis tuaj yeem siv rau MAG lossis MIG vuam; Pulsed arc vuam zog qhov chaw.