1. Txhawm rau txhawm rau tiv thaiv qhov xeb ntawm qhov muag vim muaj cua sov, lub vuam tam sim no yuav tsum tsis txhob loj dhau, 20% tsawg dua carbon hlau electrode, arc yuav tsum tsis txhob ntev dhau, qhov interlayer txias kom nrawm, thiab vuam vuam hlaws dai zoo dua.
2. Lub hardenability ntawm stainless hlau yeeb fittings tom qab vuam yog tus loj, uas yooj yim tawg. Yog hais tias vuam nrog cov kav hlau tsis xeb hlau fittings yog saws, preheating saum toj no 300 ℃ thiab qeeb cua txias ntawm 700 ℃ tom qab welding yuav tsum tau nqa tawm. Yog tias lub weldment tsis tuaj yeem raug rau tom qab tsim kho cua sov, yuav tsum siv cov yeeb nkab hlau tsis xeb.
3. Rau cov yeeb nkab steel hlau fittings, cov nqi tsim nyog ntawm cov tsis sib haum Ti, Nb, Mo, thiab lwm yam ntxiv rau txhim kho kev txhim kho corrosion thiab weldability. Lub weldability zoo dua li cov yeeb nkab steel hlau fittings. Thaum siv cov qub chromium stainless hlau electrode, nws yuav tsum tau preheated siab tshaj 200 ℃ thiab ntsuas kub ntawm 800 ℃ tom qab xaim. Yog tias cov hlau txuas tsis tuaj yeem kho kub, chromium-nickel stainless hlau electrode yuav tsum siv.
4. Vuam pas nrig rau steel hlau yeeb nkab fittings muaj qhov ua tau zoo ntawm kev txhim kho corrosion thiab oxidation tsis kam, thiab dav siv hauv tshuaj lom neeg, chiv, roj av, thiab kho tshuab kev lag luam.
5. Cov txheej ntawm cov yeeb nkab steel hlau fittings muaj titanium calcium hom thiab tsawg hom hydrogen. Titanium-calcium hom tuaj yeem siv rau AC thiab DC, tab sis qhov tob tob nkag tau yog ntiav thaum AC vuam, thiab nws yooj yim rau liab, yog li DC lub zog hluav taws xob feem ntau siv.
6. Stainless hlau cov yeeb nkab fittings muaj qee yam corrosion tsis kam (oxidizing acid, organic acid, cavitation), kub ua hauj thiab hnav tsis kam. Nws feem ntau yog siv los ua cov khoom siv rau cov khoom siv thiab khoom vaj khoom tsev xws li chaw nres tsheb fais fab, tshuaj lom neeg, thiab roj av. Lub weldability ntawm stainless hlau yeeb fittings yog qhov tsis zoo, yog li koj yuav tsum them sai sai rau cov txheej txheem vuam thiab xaiv cov vuam electrodes ua ntej kev kho cua sov.
7. Lub tshuab hluav taws xob yuav tsum tau ua kom qhuav thaum lub sijhawm ua haujlwm. Hom calcium-titanium yuav tsum tau ziab ntawm 150 ° C rau 1 teev, thiab hom qis-hydrogen yuav tsum tau ziab ntawm 200-250 ° C rau 1 teev (tsis txhob qhuav dua, tsis li ntawd lub txheej yuav yooj yim tawg thiab tev). Cov txheej lo nrog rau cov roj thiab lwm cov av, kom thiaj li tsis nce cov ntsiab lus carbon ntau dua ntawm qhov txuas thiab cuam tshuam rau qhov zoo ntawm qhov txuas.
8. Thaum cov yeeb nkab steel hlau txuas, welb carbides yog qhov uas nrawm dua tom qab rov ua cua sov, uas txo cov kev txhim kho corrosion thiab cov tshuab ua haujlwm.
