Yog, koj tuaj yeem weld stainless hlau rau carbon hlau, tab sis cov txheej txheem yuav tsum tau ua tib zoo saib xyuas cov khoom siv hlau xaiv, tswj cov cua sov, thiab tom qab-weld kho. Thaum koj welding stainless hlau rau carbon steel, koj tau koom nrog ob hlau nrog sib txawv tshuaj lom neeg muaj pes tsawg leeg thiab txhua yam khoom. Txoj kev tshaj plaws yog siv ib qhoaustenitic stainless hlaumuab tub lim hlau xws li ER309L los yog ER312, uas tuaj yeem ua kom haum rau qhov dilution ntawm ob lub hauv paus hlau thiab tswj kom muaj kev tiv thaiv corrosion txaus hauv kev sib koom ua tiav.
Vim li cas Vuam Stainless Hlau rau Carbon Steel txawv
Cov pa roj carbon steel thiab stainless hlau muaj qhov sib txawv thermal nthuav dav, cov ntsiab lus chromium, thiab kev coj tus cwj pwm metallurgical. Thaum koj welding stainless hlau rau carbon steel, cov txheej txheem vuam yuav tsum suav rau:
- Dilution: Lub pas dej molten weld sib tov ob lub hauv paus hlau. Yog tsis muaj txoj cai muab tub lim, koj pheej hmoo ua nyuaj, brittle martensite.
- Thermal expansion mismatch: Stainless hlau nthuav dav thiab cog lus ntau dua li cov pa roj carbon steel, ua rau muaj kev cuam tshuam thiab kev ntxhov siab.
- Corrosion kuj: Lub tshav kub- cuam tshuam cheeb tsam (HAZ) ntawm sab tsis muaj zog tuaj yeem poob nws qhov kev tiv thaiv corrosion yog tias tsis tswj xyuas kom zoo.
| Qhov xwm txheej | Carbon Steel Sab | Stainless Hlau Sab |
|---|---|---|
| Coefficient ntawm thermal expansion | ~ 11.7 × 10⁻⁶ / degree | ~ 17.3 × 10⁻⁶ / degree |
| Chromium cov ntsiab lus | 0% | 10.5–30% |
| Nickel cov ntsiab lus | 0% | 0–22% |
| Tej daim ntawv thov | Kev tsim qauv, kav dej | Corrosive ib puag ncig |
Qhov zoo tshaj plaws Filler Hlau rau Vuam Stainless Hlau rau Carbon Steel
Kev xaiv ntawm cov hlau muab tub lim yog qhov kev txiav txim siab tseem ceeb tshaj plaws thaum koj txuas stainless hlau rau carbon hlau. Qhov kev xaiv tsis ncaj ncees ua rau tawg, lub zog tsis zoo, lossis ua tsis tiav corrosion.
| Filler Hlau | Zoo tshaj rau | Cov khoom tseem ceeb |
|---|---|---|
| ER309L (GMAW/GTAW) or E309L-16 (SMAW) | Feem ntau xaiv rau koom nrog austenitic stainless hlau rau carbon hlau | High chromium thiab npib tsib xee cov ntsiab lus tswj kev dilution zoo |
| ER 309 LSI | Zoo ib yam li 309L nrog kev ua kom ntub dej zoo dua | Txhim kho cov dej fluidity rau GMAW |
| SIB 312 | Dissimilar hlau nrog siab dilution txaus ntshai | Cov ntsiab lus ferrite siab dua tiv thaiv kev tawg |
| ERNiCr-3 (Inconel 82) | High -kub los yog corrosive kev pab cuam | Nickel{0}}raws li, zoo heev toughness |
Pom zoo: ER309L / E309L-16yog tus qauv kev lag luam rau vuam austenitic stainless hlau (304, 316) rau carbon hlau. Nws cov ntsiab lus alloy siab (23% Cr, 13% Ni) kom ntseeg tau tias cov nyiaj tso nyiaj tseem nyob austenitic txawm tias tom qab diluting nrog carbon hlau.
Kauj ruam -los ntawm- Kauj Ruam: Yuav Ua Li Cas Weld Stainless Hlau rau Carbon Steel
- Ntxuav ob lub hauv paus hlau kom huv si: Tshem tawm cov roj, roj, xeb, thiab zeb nplai los ntawm ob qho tib si carbon hlau thiab stainless hlau nto. Kev sib kis tuaj yeem ua rau cov pa roj carbon monoxide thiab porosity.
- Xaiv austenitic stainless hlau muab tub lim (ER309L): Siv ER309L rau feem ntau daim ntawv thov koom nrog austenitic stainless hlau qib (304, 316, 321) rau carbon hlau. Qhov muab tub lim no tsim cov khoom siv vuam uas tseem tawv thiab tawg -resistant.
- Siv cov khoom siv hluav taws xob tsawg: Stainless hlau muaj qis thermal conductivity tshaj carbon steel. Siv 15-20% cua sov tsawg dua li koj xav tau rau carbon hlau ib leeg. Khaws qhov kub nruab nrab ntawm 150℃(300℃F).
- Khaws ib qho luv luv arc ntev: Lub luv luv arc txo qis chromium poob thiab oxidation hauv pas dej ua ke. Qhov no khaws cia corrosion kuj nyob rau hauv lub tiav kev sib koom tes.
- Weld nrog me ntsis offset rau ntawm stainless sab: Direct lub arc ntau mus rau stainless hlau kom paub meej fusion thiab dilution tswj.
- Tswj distortion nrog tack welds thiab sequencing: Vim tias stainless hlau nthuav dav thiab sib cog lus ntau dua cov hlau, siv cov tack welds txaus thiab sib npaug sib npaug (rov qab los yog hla vuam).
- Tom qab -welding kev kho mob: Sib tsoo cov weld smooth. Rau cov ntawv thov uas xav tau qhov siab tshaj plaws corrosion kuj, xav txog pickling thiab passivation los kho cov txheej txheem tiv thaiv chromium oxide ntawm stainless hlau nto.
Puas yog Vuam Stainless Hlau rau Carbon Steel Compromise Corrosion Resistance?
Yog lawm, qhov sib koom ua ke yuav muaj kev tiv thaiv corrosion tsawg dua li cov hlau tsis muaj steel ib leeg.Thaum koj welding stainless hlau rau carbon steel, qhov kev txhawj xeeb tseem ceeb yog qhov kub siab - cuam tshuam cheeb tsam ntawm austenitic stainless hlau tuaj yeem ntsibkev xav- chromium carbide tsim ntawm cov ciam teb nplej uas depletes chromium thiab txo cov corrosion kuj.
Yuav Ua Li Cas Tsawg Corrosion Resistance Loss
- Siv cov qib qis- carbon stainless hlau qib (304L, 316L) ntawm sab stainless
- Khaws cov cua kub tawm kom tsawg thiab sib cuam tshuam qhov kub thiab txias tswj
- Xav txog kev tshaj tawm -weld pickling thiab passivation
- Rau ib puag ncig corrosive hnyav, siv nickel -raws li muab tub lim (ERNiCr-3)
Cov ntsiab lus tseem ceeb thaum koom nrog Carbon Steel rau Stainless Hlau
Siv tau cov txheej txheem vuam
Cov txheej txheem vuam koj xaiv cuam tshuam rau kev sib koom ua haujlwm zoo thiab tsim khoom:
| Vuam txheej txheem | Qhov zoo | Kev txiav txim siab |
|---|---|---|
| SMAW (Stick) | Ntau yam, ua haujlwm hauv thaj chaw | qeeb, ntxuav ntau dua |
| GMAW (MIG) | High productivity, zoo rau ntau lawm | Yuav tsum muaj cov roj tiv thaiv zoo (98% Ar / 2% O₂) |
| GTAW (TIG) | Qhov zoo tshaj plaws, kev tswj xyuas meej | Tsawg dua, yuav tsum muaj kev txawj ntse dua |
| FCAW (Flux-Cored) | Zoo rau cov ntu tuab | Flux tuaj yeem nyuaj dua los ntxuav los ntawm stainless hlau |
Kev Pabcuam Ib puag ncig tseem ceeb
- Sab hauv / qhuav ib puag ncig: Txheem ER309L yog txaus rau feem ntau cov qauv siv
- Sab nraum zoov / ntub: Siv 309L nrog kev sib khi kom zoo los tiv thaiv galvanic corrosion ntawm cov kab sib txuas
- Submerged / tshuaj raug: Hloov kho rau ERNiCr-3 muab tub lim thiab xav txog kev tiv thaiv corrosion ntawm sab carbon steel
Cov lus nug nquag
Koj puas tuaj yeem welding stainless hlau rau carbon hlau tsis muaj hlau?
Tsis yog. Autogenous welding (tsis muaj qhov muab tub lim) ntawm cov hlau tsis muaj steel rau carbon steel ua rau lub pas dej ua kom muaj zog heev uas ua rau nkig martensite. Ib txwm siv cov hlau uas tsim nyog xws li ER309L.
Yuav ua li cas yog tias koj siv carbon steel muab tub lim rau stainless?
Lub weld yuav nyuaj, nkig, thiab nquag tawg. Carbon steel muab tub lim tsis muaj chromium thiab nickel xav tau los tswj cov qauv austenitic tom qab dilution. Qhov tshwm sim weld tuaj yeem ua tsis tiav hauv thermal lossis mechanical stress.
Koj puas tuaj yeem txuas 304 stainless rau carbon steel?
Yog. 304 (austenitic stainless hlau) yog ib qho ntawm cov qib feem ntau koom nrog cov hlau. Siv ER309L muab tub lim, tswj cov khoom cua sov, thiab ua raws li cov kauj ruam saum toj no. Lub weld yuav muaj zog thiab ductile rau feem ntau daim ntaub ntawv.
Puas yog vuam carbon steel rau stainless hlau yuav tsum tau preheat?
Generally no. Preheat is not required for austenitic stainless steel. In fact, preheat can increase the risk of sensitization. If the carbon steel side is thick (>25mm), qhov qis preheat (100-150 degree) yuav pab tau, tab sis cia nws txias maj mam.
Koj puas tuaj yeem Weld tsis tu ncua steel rau stainless hlau?
Yog lawm,Cov hlau tsis tu ncua tuaj yeem welded rau stainless hlau.
Xaus
Weld stainless hlau rau carbon steel yogtswv yim thiab dav uathaum cov txheej txheem raug ua raws. Siv ibaustenitic stainless hlau muab tub lim(ER309L / E309L-16) los daws cov dilution, tswj cov khoom siv hluav taws xob los tiv thaiv corrosion, thiab xaiv cov txheej txheem vuam zoo rau koj daim ntawv thov. Kev sib koom ua ke yuav tsis sib haum rau cov hlau tsis muaj zog corrosion, tab sis rau feem ntau cov qauv thiab kev pabcuam kev pabcuam, nws muab lub suab, kev sib txuas ruaj khov.
