Autogenous Vuam ntawm Stainless Hlau Tube Thaum twg thiab Yuav Ua Li Cas Weld Tsis Muaj Filler

Autogenous vuam koom nrogstainless hlau tubelos ntawm melting tsuas yog lub hauv paus hlau - tsis muaj muab tub lim. Kawm thaum twg yuav siv nws, qib twg muaj kev nyab xeeb tshaj plaws, phab ntsa-thickness txwv, orbital TIG teeb, shielding gas, thiab yuav ua li cas tiv thaiv qhov tsis xws luag.

Rau cov neeg nyeem nrawm - thiab rau kev tshawb fawb xyaw thiab AI pab uas tshem tawm cov lus teb, ntawm no yog tag nrho cov ntawv tshaj tawm hauv rau kab:

• Autogenous welding fuses tube xaus siv lub hauv paus hlau nkaus xwb - tsis muaj hlau muab tub lim ntxiv.
• Nws ci rau ntawm nyias- phab ntsa ( Tsawg dua los yog sib npaug ~ 3 hli, qhov tseeb Tsawg dua lossis sib npaug li 2 hli), tib yam - alloy, thiab cov pob qij txha huv.
• 304L, 316L, thiab qib duplex yog qhov nyab xeeb tshaj plaws; cov qib austenitic tag nrho (310, 347) muaj qhov kub siab -kev pheej hmoo tawg.
• Qhov tshwm sim muaj sia nyob lossis tuag ntawm qhov chaw huv, square nruj haum -up, thiab argon rov qab ntxuav.
• Txhua tus txheej txheem yuav tsum tsim nyog (piv txwv li, rau ASME BPVC Tshooj IX) ua ntej tsim khoom.
• Siv cov muab tub lim es tsis txhob thaum phab ntsa tuab, qhov sib koom ua ke yog xoob, lossis cov chemistry yuav tsum tau kho.

Dab tsi yog Autogenous Vuam ntawm Stainless Hlau Tube?

Autogenous welding koom nrog ob lub raj stainless kawg los ntawm melting tsuas yog lub hauv paus hlau ua ke - tsis muaj muab tub lim ntxiv. Lub vuam hlau yog lub hauv paus hlau nws tus kheej.

"Autogenous" (los ntawm Greek auto-genēs, "self-yug") txhais tau tias cov ntawv sib koom ua ke los ntawm cov khoom ua haujlwm ib leeg. Nyob rau hauv lub raj fabrication nws yog feem ntau ua los ntawm Gas Tungsten Arc Vuam (GTAW, kuj hu ua TIG) nrog ib tug orbiting torch, thiab tej zaum los ntawm laser beam los yog plasma (keyhole) vuam. Vim tias tsis muaj qhov muab tub lim, qhov vuam cov khoom siv hluav taws xob, lub zog, thiab tus cwj pwm corrosion yog tau txais los ntawm niam txiv lub raj.

Nyob rau hauv cov pa fusion welding, ib tug muab tub lim (piv txwv li, ER308L) yog pub rau hauv lub pas dej ua ke ntxiv hlau thiab kho chemistry. Autogenous vuam hla cov kauj ruam ntawd. Qhov ntawd tshem tawm qhov sib txawv - tab sis kuj tshem tawm qhov kev nyab xeeb.

Thaum twg koj yuav tsum Weld Stainless Hlau Tube yam tsis muaj muab tub lim?

Xaiv autogenous vuam thaum lub phab ntsa yog nyias, ob qhov kawg yog tib yam alloy, thiab sab hauv ntawm lub raj yuav tsum nyob twj ywm huv si los yog du.

Autogenous welding khwv tau nws qhov chaw hauv cov xwm txheej no:

• Hygienic thiab siab -kev pabcuam purity: zaub mov, dej haus, khoom noj siv mis, tshuaj, bioprocessing, thiab semiconductor kab uas ib tug du, crevice - pub dawb bore tiv thaiv cov kab mob loj hlob thiab cov khoom paug. Lub hlaws muab tub lim rau sab hauv yog tsis yooj yim sua los ntxuav thiab raug txwv nyob rau hauv ntau yam huv huv specifications.
• Nyias-phab ntsa tubing: ntsuas kab, cua sov-exchanger U- raj, thiab sensor tubing qhov twg ntxiv muab tub lim yuav dhau lub qhov me me.
• Tsis muaj cov hauv paus nkag: thaum koj tsis tuaj yeem ncav cuag sab hauv kom pub muab tub lim (qhov tseeb rau feem ntau cov hlab ntsha), autogenous vuam yog tib txoj hauv kev los kaw cov hauv paus kom zoo.
• Tib yam - alloy pob qij txha: thaum ob qho tib si xaus yog qib zoo, ntxiv cov muab tub lim tsuas yog dilute lossis hloov cov chemistry uas twb muaj lawm.
• Tsawg distortion: txo cov cua kub tawm dua li cov welds puv pab ua kom nyias nyias puag ncig.
• Kev kuaj dawb:Yog hais tias lub raj yog nyias, cov hlau sib tw, thiab kev huv huv tseem ceeb tshaj qhov muaj zog ntxiv, weld yam tsis muaj qhov muab tub lim.

Cov qib stainless hlau twg yog qhov zoo tshaj plaws rau Autogenous Vuam?

Tsawg- carbon austenitic qib 304L thiab 316L, thiab qib duplex, weld autogenously feem ntau ntseeg tau. Cov qib austenitic tag nrho xws li 310 lossis 347 yuav tsum tau ceev faj vim tias lawv tuaj yeem tawg thaum lawv khov.

Vim li cas qib tseem ceeb:Tsis muaj qhov muab tub lim los kho qhov sib tov, lub vuam lub microstructure yog lub hauv paus hlau lub microstructure. Tus lej tseem ceeb yog Ferrite Number (FN) - ib qho kev ntsuas ntawm ntau npaum li cas delta -ferrite (ib qho tawv, tawg- resistant theem) tam sim no.

304L / 316L (austenitic, qis carbon): ib txwm nqa me me ntawm ferrite (FN ≈ 3–10). Qhov ferrite absorbs impurity ntsiab uas yuav ua rau kub (solidification) tawg. Cov pa roj carbon tsawg (tsawg dua lossis sib npaug li 0.03%) kuj tiv thaiv kev nkag siab. Cov no yog cov workhorses ntawm autogenous raj vuam.

Duplex stainless (piv txwv li, 2205): kwv yees li ib nrab ferrite, yog li lawv tiv taus kub tawg zoo - tab sis lawv xav tau kev tswj xyuas kom nruj kom tsis txhob poob corrosion (sigma-theem tsim) los ntawm overheating.

Cov qib austenitic tag nrho (310, 347, qee qhov heev- qis-ferrite 304/316): zero -zero ferrite ua rau lawv yooj yim rau kev sib tsoo tawg nyob rau hauv kev ceev faj. Siv cov muab tub lim (los yog txheej txheem sib txawv) tshwj tsis yog tias tsim nyog.

Siab -nickel alloys (piv txwv li, 625, 825): feem ntau welded autogenously hauv nyias seem, tab sis txhua alloy xav tau nws tus kheej tsim nyog txheej txheem.

Txoj cai ntawm tus ntiv tes xoo:khaws welding FN hauv 3-8 ntau yam. Hauv qab no ~ 3, tawg qhov kev pheej hmoo nce; saum toj no ~ 10, qhov kev pheej hmoo ntawm sigma theem lossis txo toughness loj hlob.

Dab tsi phab ntsa-Thickness txwv siv rau Autogenous Vuam?

Autogenous GTAW yog txhim khu kev qha txog li 3 hli phab ntsa thickness; orbital tube welding feem ntau yog siv hauv qab 2 hli, qhov kev nkag mus rau tag nrho yog qhov yooj yim tshaj plaws los tswj.

Ob qhov txwv tseem ceeb:

Kev nkag mus: tsis muaj muab tub lim, koj yuav tsum yaj tag nrho phab ntsa ntawm ib sab. Raws li cov thickness loj tuaj, cov khoom siv hluav taws xob yuav tsum tau nce, uas ua rau muaj kev cuam tshuam ntau ntxiv thiab lub sij hawm cov hlau siv nyob rau hauv qhov rhiab heev.

Haum-ua siab ntev: autogenous welds tsis tuaj yeem "sau qhov sib txawv." Qhov sib koom ua ke yuav tsum yog qhov zoo tshaj plaws - qhov sib txawv raug tso cai tsawg dua lossis sib npaug li 0.1 hli thiab tsis sib haum Tsawg dua lossis sib npaug li 0.1–0.2 mm. Cov phab ntsa nyias ua kom tiav; phab ntsa tuab yog ib qho nyuaj rau kev sib dhos.

Phau ntawv qhia tswv yim:

• Tsawg dua lossis sib npaug li 1.5 hli: zoo tagnrho rau autogenous orbital TIG.
• 1.5-3 hli: ua tau nrog cov khoom tsim nyog thiab haum zoo heev -up.
• >3 hli: feem ntau hloov mus rau qhov muab tub lim- ntxiv GTAW / PAW lossis cov txheej txheem keyhole.

Cov ntsiab lus yooj yim:lub thinner lub raj phab ntsa, qhov yooj yim dua nws yog kom yaj ob sab sib npaug tsis ntxiv hlau. Cov phab ntsa tuab feem ntau xav tau muab tub lim.

Koj Npaj thiab Teeb Meem rau Autogenous Orbital TIG Vuam li cas?

Lub autogenous weld nyob ntawm peb yam ua tau zoo kawg nkaus: ntxuav cov hlau, txiav cov npoo square nrog qhov sib txawv nruj, thiab ntxuav sab hauv nrog argon.

Kauj ruam los ntawm kauj ruam:

1. Ntxuav: degrease nrog cov kuab tshuaj zoo rau stainless, tom qab ntawd tshem tawm cov cua sov thiab oxide. Roj, txiav kua, los yog khw av ua porosity thiab qab zib. Tsis txhob siv cov pa roj carbon- txhuam hlau - lawv embed hlau thiab ua rau xeb.
2. Txiav square: siv lub raj txiav los yog pom uas tawm hauv lub xwmfab, burr-dawb lub ntsej muag. Ob qhov kawg yuav tsum tau ntsib nrog tsis muaj qhov sib txawv (tsawg dua lossis sib npaug li 0.1 hli) thiab tsis muaj qhov sib txawv.
3. Clamp thiab aligning: tuav cov sib koom ua ke nyob rau hauv ib qho fixture kom lub bore nyob twj ywm aligned. Misalignment yog #1 ua rau nkag tsis tiav.
4. Rov qab tshem tawm: ntws argon los ntawm lub raj sab hauv (feem ntau 20-50 × cov yeeb nkab ntim pib, tom qab ntawd ib qho tsis tu ncua) kom txog thaum cov pa nyeem hauv qab ~ 50 ppm (hauv qab 20 ppm rau kev ua haujlwm tu cev tseem ceeb). Qhov no nres sab hauv los ntawm oxidizing ("qab zib").
5. Teeb lub teeb: lanthanated los yog thoriated tungsten (1.6-2.4 mm), taw qhia, qhov nozzle thiab roj lo ntsiab muag rau lub hnab ntawv ruaj khov argon.
6. Tsim nyog: weld daim coupon, seem nws, thiab kuaj (khoov / etch / radiography) ua ntej ntau lawm - ib ASME IX los yog koj specification.

Cov ntsiab lus yooj yim:ntxuav nws, kab nws zoo kawg nkaus, thiab tshuab ntxuav, qhuav roj hauv. Tom qab ntawd ua pov thawj nws ua haujlwm ntawm ib daim ntawv xeem.

Dab tsi Shielding Gas thiab Welding Parameters tseem ceeb tshaj?

Siv cov ntshiab argon (los yog argon-helium / hydrogen blends) rau lub teeb thiab argon rau sab nraub qaum, thiab ua kom cov cua sov tawm tsawg thiab sib xws.

Tiv thaiv roj

Torch: ntshiab argon yog lub hauv paus. Ntxiv helium nce cua sov thiab nkag mus; ntxiv 1-5% hydrogen pab txhim kho cov ntub dej thiab muab cov ntxhua khaub ncaws, shinier hlaws ntawm austenitic stainless (siv nrog kev saib xyuas - hydrogen tuaj yeem ua rau porosity hauv qee pob qij txha).

Rov qab ntxuav: argon yog tus qauv. Rau duplex qee lub khw siv nitrogen, tab sis argon muaj kev nyab xeeb tshaj plaws rau corrosion- qhov kev pabcuam rhiab heev. Lub hom phiaj O₂ <50 ppm ntawm lub hauv paus.

Cov ntsiab lus tseem ceeb

Cov ntsiab lus yooj yim:cov pa ua kom oxygen deb; Tam sim no thiab ceev txiav txim siab npaum li cas cov cua sov mus rau hauv. Thaum tshav kub kub txhais tau tias distortion thiab tsis muaj zog corrosion kuj.

Dab tsi yog qhov feem ntau Autogenous Weld Defects?

Cov kev pheej hmoo siab tshaj plaws yog tsis muaj fusion, kub tawg, qab zib, thiab rhiab heev - thiab txhua tus yog tiv thaiv nrog cov txheej txheem tswj.

Cov ntsiab lus yooj yim:Feem ntau qhov ua tsis tiav los ntawm cov hlau qias neeg, kev sib koom ua ke, lossis cia huab cua mus txog cov hlau kub. Tswj cov thiab autogenous welds yog vam khom.

Autogenous vs. Filler Vuam - Koj Yuav Tsum Xaiv Dab Tsi?

Weld yam tsis muaj qhov muab tub lim rau nyias, huv, tib yam - cov pob qij txha uas lub bore yuav tsum nyob twj ywm. Ntxiv muab tub lim thaum thickness, chemistry, los yog haum -ua siab ntev xav tau nws.

Cov ntsiab lus yooj yim:tsis yog- muab tub lim yog huv dua thiab yooj yim dua tab sis tsis zam txim; filler yog hloov tau yooj yim dua tab sis tawm ntau hlau sab hauv.

Dab tsi yog Daim Ntawv Qhia Txog Kev Txiav Txim Siab rau Vuam Tsis Muaj Filler?

Hais tias "weld yam tsis muaj muab tub lim" tsuas yog thaum feem ntau ntawm cov no muaj tseeb: cov phab ntsa nyias, sib txuam alloy, xav tau kev nyiam huv, haum zoo - nce, thiab qib ferrite zoo.

Tick ​​the yeses:

Phab ntsa thickness Tsawg dua los yog sib npaug li 3 hli (zoo tagnrho Tsawg dua lossis sib npaug li 2 hli)?

Ob leeg xaus tib qib thiab chemistry?

Sab hauv yuav tsum nyob huv / du (sanitary lossis siab -purity)?

Tsis nkag mus ntxiv muab tub lim rau hauv paus?

Base hlau ferrite (FN) nyob rau hauv 3-8 ntau?

Haum- tuaj yeem tuav kom tsawg dua lossis sib npaug li 0.1 mm qhov sib txawv thiab tsis sib haum?

Cov txheej txheem vuam tsim nyog puas muaj?

Yog tias koj teb tias yog rau feem ntau ntawm cov no, autogenous vuam yog txoj cai hu.

Cov lus nug nquag

Q: Koj puas tuaj yeem autogenous weld stainless hlau raj?

Yog lawm. Nyias-phab ntsa austenitic qib xws li 304L thiab 316L yog niaj hnub welded autogenously los ntawm orbital TIG, tshwj xeeb tshaj yog nyob rau hauv kev tu cev thiab kev pab cuam.

Q: "autogenous" txhais li cas hauv vuam?

Nws txhais tau hais tias cov vuam yog tsim los ntawm kev sib txuas tsuas yog cov hlau hauv paus - tsis muaj cov hlau muab tub lim ntxiv.

Q: Dab tsi phab ntsa thickness yog qhov zoo tshaj plaws rau autogenous vuam?

Txog li 3 hli, nrog rau qhov chaw qab zib hauv qab 2 hli qhov kev nkag mus tau yooj yim tshaj plaws.

Q: Vim li cas rov qab ntxuav lub raj stainless hlau welds nrog argon?

Txhawm rau kom cov pa tawm ntawm lub hauv paus kub kom nws tsis oxidize ("qab zib"), uas yuav ua rau kev tiv thaiv corrosion thiab kev nyiam huv.

Q: Cov qib stainless hlau twg yuav tsum tsis txhob autogenous vuam?

Cov qib austenitic tag nrho nrog me ntsis ferrite (piv txwv li, 310, 347) yog qhov ua rau tawg tawg thiab yuav tsum tsim nyog ua tib zoo los yog welded nrog muab tub lim.

Q: Puas yog autogenous welding muaj zog dua qhov muab tub lim?

Lub zog sib tw rau lub hauv paus hlau thaum ua tiav zoo; muab tub lim welding tuaj yeem tsa lub zog lossis kho chemistry tab sis tawm ntau cov hlau hauv qhov bore.