Lub hardenability ntawm stainless hlau yeeb fittings tom qab welding yog tus loj, thiab tawg yooj yim tshwm sim. 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.
Txhawm rau txhawm rau txhim kho qhov kev txhim kho corrosion thiab weldability ntawm stainless hlau yeeb fittings, cov nqi tsim nyog ntawm cov tsis haum xws li Ti, Nb, Mo, thiab lwm yam ntxiv. 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.
Cov yeeb nkab steel hlau muaj qhov tsis txaus xeb thiab oxidation tsis kam, thiab dav siv hauv tshuaj lom neeg, chiv, roj av, thiab tshuab kev tsim kho.
Muaj cov titanium calcium hom thiab qis hom hydrogen rau cov yeeb nkab steel hlau. 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.
Stainless hlau yeeb 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.
Cov electrode yuav tsum tau ceev kom qhuav thaum lub sijhawm ua haujlwm. Cov titanium calcium hom yuav tsum tau ziab ntawm 150 ° C rau 1 teev, thiab hom hydrogen tsawg yuav tsum tau ziab ntawm 200-250 ° C rau 1 teev (tsis txhob qhuav tas li, tsis li ntawd lub txheej yuav yooj yim tawg thiab tev). Ua zoo saib ntawm txheej ntawm electrode. Cov roj nplaum thiab lwm cov av, yog li kom tsis txhob ua rau cov pa roj carbon ntau ntxiv ntawm qhov txuas thiab cuam tshuam rau qhov zoo ntawm qhov txuas.
