Cov kev ceev faj rau welding ntawm stainless hlau clad steel

Stainless hlau clad steel phaj yog tsim ntawm ob hom sib txawv ntawm cov hlau daim hlau, suav nrog cladding (steel hlau) thiab puag txheej (carbon hlau, tsis tshua muaj lub zog steel). Txij li muaj ob lub hauv paus cov ntaub ntawv ntawm pearlite steel thiab austenitic steel thaum vuam stainless clad steel, lub vuam ntawm clad steel phaj belongs rau lub vuam ntawm cov hlau tsis sib xws. Yog li no, cov txheej txheem sib xyaw yuav tsum tau ua thaum lub sijhawm vuam tsis yog tsuas yog ua tau raws li lub zog ntawm qhov vuam txheej ntawm lub hauv paus txheej, tab sis kuj xyuas kom qhov kev txhim kho corrosion ntawm txheej. Yog tias txoj haujlwm tsis raug, nws yuav muaj qhov tsis zoo. Cov kev qhia txog kev ceev faj thaum lub sijhawm vuam muaj raws li nram no:

Xim Hlau Stainless Sheet

1, tib yam vuam siv tsis tau siv los txuas weld stainless Cheebtsam steel Cheebtsam. Rau kev sib xyaw ua ke ntawm cov hlau tsis huv, nws yog qhov tsim nyog kom ua tau raws li lub zog ntawm qhov vuam txheej ntawm lub vuam txheej ntawm lub hauv paus txheej thiab los xyuas kom meej qhov corrosion tsis kam ntawm cov xim lo. Yog li no, cov khoom siv ntawm cov hlau stainless clad nws muaj nws qhov tshwj xeeb. Lub hauv paus txheej thiab lub hauv paus txheej yuav tsum tau welded nrog carbon hlau thiab tsawg alloy hlau electrodes sib nug xov mus rau lub hauv paus txheej khoom, xws li E4303, E4315, E5003, E5015, thiab lwm yam; rau txheej txheej, txheej txheem carbon yuav tsum zam. Vim tias cov pa roj carbon ntau ntxiv ntawm lub weld yuav txo tau qhov kub tsis kam ua haujlwm ntawm cov hlau tsis xeb hlau sib xyaw. Yog li no, cov hlau txuas ntawm cov khoom sib dhos thiab cov khoom tsim coj yuav tsum xaiv cov electrode sib thooj rau cov khoom siv coj los ua ke, xws li A132 / A137, thiab lwm yam.; vuam ntawm txoj kev hloov txheej ntawm qhov kev sib txuas ntawm lub hauv paus txheej thiab cov cladding yuav tsum txo cov nyhuv dilution ntawm carbon hlau ntawm cov hlau tsis xeb hlau sib xyaw ua ke thiab ntxiv rau vuam txheej txheem hlawv kev poob ntawm cov alloy sib xyaw. Cr25Ni13 los yog Cr23Ni12Mo2 hom electrodes nrog cov chromium thiab cov ntsiab lus siab me tuaj yeem siv, xws li A302 / A307.

2. Rau qhov txuas ntawm stainless clad steel phaj, ntug tsis ncaj yuav tsum tsis pub tshaj tus nqi tso cai (1 hli). Stainless clad steel daim hlau feem ntau yog tsim ntawm txheej txheej thiab cladding txheej nrog tuab ntawm tsuas yog 1.5 mus rau 6.0 hli. Xav txog tias ntxiv rau qhov txaus siab rau cov khoom siv kho tshuab ntawm lub Cheebtsam, cov khoom sib xyaw stainless steel kuj tseem xav tau kom muaj kev txhim kho corrosion ntawm cov xim nyob rau hauv kev sib cuag nrog qhov nruab nrab corrosive. Yog li no, thaum sib sau lub weldment, nws yog qhov yuav tsum tau ua kom tiav cov txheej cladding raws li lub hauv paus, thiab lub ntug qhov txheej txheej yuav tsum tsis pub tshaj 1 hli. Qhov no yog qhov tshwj xeeb tshaj yog thaum muab cov hlau stainless steel txuas nrog cov thicknesses sib txawv. Yog tias cov misalignment nruab nrab ntawm cov khaubncaws sab nraud povtseg txheej ntau dhau, qhov weld ntawm lub hauv paus ntawm txheej txheej yuav yaj qee ntawm cov hlau tsis huv, uas ua rau cov khoom siv hlau ntawm cov hlau txuas ntawm lub hauv paus ntawm txheej txheej, ua rau lub weld los ua nyuaj thiab nkig, thiab tib lub sijhawm, cov xeb tsis xeb hlau ntawm pob tw ua ke yog thinned. Thickness yuav txo qhov kev pab cuam lub neej, cuam tshuam rau qhov chaw tsis zoo ntawm txheej cladding, thiab nws yog qhov nyuaj los xyuas kom meej corrosion ntawm cov qauv welded.

3, nws yog kiag li txwv tsis pub txuas weld txoj kev hloov txheej lossis vuam txuas stainless hlau nrog cov khoom siv vuam ntawm vuam puag txheej: tib lub sijhawm, tiv thaiv cov khoom siv vuam txuas tsis zoo rau ntawm qhov vuam seam ntawm vuam hloov txheej thiab puag txheej.

4. Thaum lub hauv paus txheej vuam cov khoom siv yog siv los txuas lub txheej ntawm sab cladding, ib qho tshuaj dawb ua xaum yuav tsum muaj nyob rau hauv 150mm ntawm ob sab ntawm qhov zawj los tiv thaiv nws los tiv thaiv lub hauv paus txheej nugget cov khoom siv los txhawm rau txhawm rau sab hauv steel hlau. thaum lub sij hawm ua vuam. Lub oxide zaj duab xis nyob rau saum npoo cuam tshuam qhov kev txhim kho corrosion ntawm cov hlau tsis xeb hlau. Spatter cov qhov me me uas tau txais yuav tsum ua kom huv.

5. Lub hauv paus caws ntawm lub hauv paus txheej adopts electrode arc vuam. Txhawm rau kom txo qhov sib xyaw ntawm cov ntsiab lus sib xyaw hauv cov xwm txheej kom ntseeg tau tias nkag mus, qhov sib piv fusion yuav tsum muaj tsawg kawg nkaus. Lub sijhawm no, ib lub vuam me tam sim no thiab vuam nrawm nrawm dua tuaj yeem siv. Cia viav vias rau ib sab. Lub vuam ntawm cov cladding yuav tsum xaiv cov khoom siv vuam vuam me me, kom lub sijhawm nyob hauv qhov chaw txaus ntshai (450 ~ 850 ℃) thaj chaw yog luv li sai tau. Tom qab welding, dej txias tuaj yeem siv rau qhov txias txias.

6, yog hais tias tus txiv neej cov hlau xaim pom tias muaj cov teeb meem tsis zoo ua ntej vuam, vuam tsis tso cai. Lub delamination yuav tsum tau muab tshem tawm ua ntej, kho kho hlau (piv txwv li, overlay vuam), thiab welding tom qab kho.

7. Cov cuab yeej tshwj xeeb yuav tsum tau siv los ntxuav lub hauv paus txheej thiab ob sab ntawm cladding. Lub hauv paus txheej yuav tsum siv cov hlau txhuam cov xov hlau txhuam, thiab cov cladding yuav tsum siv cov khoom siv hlau txhuam cov hlau hlau.


Lub sij hawm tshaj tawm: Lub Ib Hlis-06-2021