1.4404 stainless hlau vuam cov zog

Vuam cov teeb meem ntawm 1.4404 stainless hlau tsim:

1.44 {0 4 4 stainless hlau (raws li enisi-tsawg ecietenitic stainless hlau (C Ua tsaug rau nws cov khoom muaj tshwj xeeb, nws yog cov khoom siv uas xaiv rau kev thov vuam cov ntawv thov, tshwj xeeb hauv kev ua lag luam siv tshuaj, khoom noj, thiab marine engineering kev lag luam.

1. Qhov tseem ceeb vuam zoo ntawm 1.4404 stainless hlau

✔ Ib txwm tiv taus rau intergranular corrosion

Cov ntsiab lus roj carbon-tsawg cov ntsiab lus muaj txiaj ntsig zoo txhawb cov nag lossis daus ntawm cov chromium carbides (cr aromium carbides (cr alc₆) hauv tshav kub-cuam tshuam rau qhov kub-cuam tshuam (hz). Raws li qhov tshwm sim, 1.4404 stainless hlau muaj peev xwm dhau ntawm ASTM A262 kev xyaum ua kom muaj kev tiv thaiv tshav kub tsis xav tau kev ua pa ntxiv hauv 316 stainless hlau (piv txwv li, en 1.440).

✔ Tau siab ntau weld kev sib xyaw

Thaum welded nrog ER316L cov tub lim hlau (C tsawg dua lossis sib npaug. {1}} 4%, MO 2.0-2.5%), MO 2.0-2.5%), MO 2.0-2.5%), MO 2.0-2.5%), MO 2.0-2.5%), MO 2.0-2.5%), MO 2.0-2.5%) Lub zog tensile ntawm Weld ntau tshaj 520 MPa, nrog tus nqi elongation saum toj 35%, ua kom muaj cov khoom siv neeg kho mob sib piv nrog cov ntaub ntawv niam txiv.

✔ Cov tsis tshua muaj kev phom sij

Ua tsaug rau nws cov qauv Austenitic thiab nruj cov kab mob uas tsis muaj txiaj ntsig los yog sib npaug rau cov neeg (1) {{}}}}}}}.

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2. Cov txheej txheem tseem ceeb thiab tswj kev tswj

Cov Khoom Siv Khoom Siv Ua Si

Vuam txoj kev	Pom zoo muab tub lim hlau	Qhov Zoo
Tig \/ MIG VUAM	ER316L (H03CR19NI2MO2)	Zoo tshaj plaws corrosion tsis kam; Haum rau nyias daim ntawv vuam (tsawg dua los yog sib npaug rau 3 hli)
Los ntawm txhais tes smaw	E316L -16 (A022 electrode)	High mo cov ntsiab lus rau cov pitting zoo dua; Qhov zoo tagnrho rau tuab phaj vuam (ntau dua los yog sib npaug rau 5 hli)

Qhov tseem ceeb ntsuas hluav taws xob

Cov tswv yim tshav kub:

Tig Vuam: Max tam sim no tsawg dua lossis sib npaug rau 12 {2}} A rau 1.0 hli daim hlau

MIG VUAM: Voltage ntawm 20-25v

Khaws cov lus tawm kom sov dua lossis sib npaug15 KJ \/ CMTxhawm rau tiv thaiv cov nplej coarsening

Sib txuam Kub:

Tswj kom tsawg dua lossis sib npaug150 QibThaum lub sij hawm ntau tshaj vuam (tus ntsuas tus ntsuas tus pas ntsuas kub)

Tiv Thaiv Roj:

Kev sivNtshiab Argon (99.99%), Flowle tus nqi 15-20 l \/ min kom tsis txhob weld oxidation thiab khaws cov corrosion tsis kam

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3. Raug Vuam Cov Ntawv Thov

Kev Siv Tshuaj Siv Khoom Siv Hluav Taws Xob

Qhov zoo tagnrho rau kev txhoj puab ib puag ncig xws li PTA Pipelines thiab cov tshuaj reactors. Tom qab-Weld qauv ntsib ASME BPVV siab rau cov qauv kev kho tsis muaj kev kho kom sov thiab cov nqi kho.

Cov Khoom Siv Khoom Noj Khoom Haus

Nyob rau hauv tig vuam ntawm mis nyuj kom tsis kom tsis muaj menyuam, siv ER316L Carter kom tau ntau dua lossis sib npaug nrog FDA 21 CFR 174.5 kev nyiam FDAnd.

Marine Engineering qauv

Nyob rau hauv seaterwater desalination tshuab, 1.4404 wels tiv thaiv chloride motural> 20, {} ppm. Weld pitting tiv taus tus lej (pren) ntau dua lossis sib npaug nrog 26, txuas ntxiv lub neej los ntawm 1.5 × piv rau cov qauv 316 welds.

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4. Vuam kev ceev faj

Tsis txhob muab tub lim \/ luj hlau tsis sib haum:
Tsis txhob siv 316 (1.440) Vuam pas nrig rau weld 1.4404 stainless hlau, ua cov ntaub ntawv roj carless mismatch tuaj yeem ua rau weld seam corrosion.

Ncej-Weld Deg Kho:
Perform pickling and passivation using 20% ​​nitric acid + 5% hydrofluoric acid to remove oxides and restore the protective passive layer-enhancing corrosion resistance by up to 30%.

Tsis yog-ua kev sim siab:
Cov khoom siv tseem ceeb yuav tsum tau mus kuaj PT (kev kuaj mob siab rau sab hauv thiab siv ntau dua lossis muaj sib npaug φd ill Weld kev ncaj ncees.