Cuaj qhov teeb meem loj hauv Stainless Hlau Vuam

1. Dab tsi yog stainless hlau thiab acid resistant stainless hlau?

Teb: Cov ntsiab lus ntawm lub ntsiab tseem ceeb "chromium" nyob rau hauv cov ntaub ntawv hlau (nrog rau qhov sib ntxiv ntawm lwm yam xws li npib tsib xee thiab molybdenum) tuaj yeem ua rau cov hlau tsis muaj zog thiab muaj cov yam ntxwv tsis zoo. 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?

Teb: Austenitic stainless hlau yog cov khoom siv dav tshaj plaws thiab muaj ntau yam loj tshaj plaws. Piv txwv li:

18-8 series: 0Cr19Ni9 (304) 0Cr18Ni8 (308)
18-12 series: 00Cr18Ni12Mo2Ti (316L)
25-13 series: 0Cr25Ni13 (309)
25-20 series: 0Cr25Ni20, thiab lwm yam

3. Vim li cas thiaj muaj qee yam kev nyuaj hauv kev vuam stainless hlau?

Teb: Cov txheej txheem tseem ceeb nyuaj yog:
1) Cov khoom siv hlau tsis muaj zog muaj zog thermal rhiab heev, nrog lub sijhawm nyob ntev me ntsis hauv qhov kub ntawm 450-850 ℃, ua rau muaj qhov txo qis hauv corrosion kuj ntawm welds thiab tshav kub cuam tshuam cheeb tsam.
2) Nws yooj yim rau thermal tawg.
3) Kev tiv thaiv tsis zoo thiab kub kub oxidation hnyav.
4) Lub coefficient ntawm linear expansion yog loj, uas ua rau lub vuam tseem ceeb deformation.

4. Vim li cas cov txheej txheem ua tau zoo tsim nyog rau kev vuam austenitic stainless hlau? Lus Teb: Cov txheej txheem dav dav suav nrog:
1) nruj me ntsis xaiv cov khoom siv vuam raws li cov tshuaj muaj pes tsawg leeg ntawm cov khoom siv hauv paus.
2) Me me tam sim no, vuam ceev; Cov kab me me hluav taws xob txo cov cua sov nkag.
3) Nyias txoj kab uas hla vuam hlau thiab electrode, tsis viav vias, ntau txheej thiab ntau dhau vuam.
4) Kev quab yuam txias ntawm welds thiab tshav kub cuam tshuam cov cheeb tsam kom txo tau lub sij hawm nyob ntawm 450-850 ℃.
5) TIG vuam seam rov qab argon tiv thaiv.
6) Lub weld seam nyob rau hauv kev sib cuag nrog corrosive nruab nrab yog thaum kawg welded.
7) Passivation kev kho mob ntawm welds thiab tshav kub cuam tshuam cheeb tsam.

5. Vim li cas thiaj li yuav tsum tau siv 25-13 series vuam hlau thiab electrode rau vuam austenitic stainless hlau, carbon hlau, thiab cov hlau tsis tshua muaj hlau (dissimilar steel vuam)?

Teb: Rau vuam sib txawv steel pob qij txha txuas austenitic stainless hlau nrog cov hlau thiab cov hlau tsis tshua muaj hlau, cov hlau tso ntawm cov vuam yuav tsum siv 25-13 series vuam hlau (309, 309L) thiab vuam rods (Ao312, Ao307, thiab lwm yam.) . Yog tias siv lwm cov khoom siv hlau tsis muaj steel hlau, cov qauv martensitic yuav raug tsim los ntawm cov kab fusion 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 tiv thaiv ntawm 98% Ar + 2% O2 siv rau cov khoom siv stainless hlau vuam hlau?

Teb: Thaum siv cov khoom siv hlau stainless hlau MIG vuam, yog siv cov roj ntshiab argon tiv thaiv, qhov nro ntawm lub pas dej molten yog siab, lub vuam tsim tsis zoo, thiab cov duab vuam yog "hunchback". Ntxiv 1-2% oxygen los txo qhov nro ntawm lub pas dej molten, uas ua rau muaj kev sib haum xeeb thiab zoo nkauj zoo nkauj.

7. Vim li cas qhov saum npoo ntawm cov khoom stainless hlau vuam hlau MIG weld tig dub?

Teb: Cov hlau tsis muaj steel hlau MIG vuam muaj qhov ceev vuam ceev (30-60cm / min), thiab cov pa roj tiv thaiv tau khiav mus rau pem hauv ntej molten pas dej ua ke. Lub vuam tseem nyob rau hauv lub kub kub kub lub xeev, oxidized los ntawm huab cua, thiab nto generates oxides, ua rau lub weld tig dub. Txoj kev pickling 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 hlau vuam hlau yuav tsum muaj lub zog hluav taws xob kom ua tiav dav hlau hloov pauv thiab txhuam tsis pub vuam?

Teb: Thaum siv cov khoom siv hlau stainless hlau rau MIG vuam, nrog ib txoj kab uas hla ntawm 1.2 hlau, kev hloov dav hlau tuaj yeem ua tiav thaum tam sim no kuv yog ≥ 260-280A; Droplets hauv qab no tus nqi yog suav hais tias yog luv luv-circuit hloov, nrog rau splashing tseem ceeb thiab feem ntau siv tsis tau. Tsuas yog los ntawm kev siv lub tshuab hluav taws xob MIG nrog lub mem tes tam sim no ntau dua 300A tuaj yeem hloov pauv hloov pauv mem tes tau ua tiav hauv cov vuam tam sim no ntawm 80-260A yam tsis muaj qhov sib tsoo.

9. Vim li cas CO2 roj shielding siv rau flux cored stainless hlau vuam hlau? Koj tsis xav tau lub hwj huam mov nrog pulses?

Teb: Tam sim no, feem ntau siv flux cored stainless hlau vuam hlau (xws li 308, 309, thiab lwm yam) muaj cov qauv flux tsim los ntawm kev siv vuam tshuaj metallurgical cov tshuaj tiv thaiv tsim los ntawm CO2 roj tiv thaiv, yog li lawv tsis tuaj yeem siv rau MAG lossis MIG vuam. ; Pulse arc vuam qhov chaw fais fab siv tsis tau.