Yog lawm,7018 vuam pas nrig feem ntau xav tau cia thiab ziab hauv qhov cubnyob rau hauv feem ntau cov tswv yim. Qhov no yog khi ncaj qha rau lawv cov qauv tsim ua "tsawg} hydrogen electrode"} hydrogen electrode "}}}}}}}}}}}}} heev rhiab rau ya raws. Hauv qab no yog vim li cas ncu yog qhov tsim nyog, yuav siv lawv li cas, thiab tsis muaj kev zam tsawg.
Vim li cas 7018 Rods nyob ntawm qhov cub cia
Qhov 7018 tau cais raws li qhov qis - hydrogen electrode (tus "18" hauv nws lub npe qhia tau cov cuab yeej no). Nws cov txheej, uas ua rau muaj zog, tawg {{}}} tiv taus welds, yogHYGROSCOPIC{{0-} Lub ntsiab lus nws nqus dej noo los ntawm huab cua. Cov dej noo no ua rau muaj teeb meem tseem ceeb:
Hydrogen -} inducle cracking (hic): Thaum noo noo nyob rau hauv txheej yog rhuab thaum lub sij hawm vuam, nws tso tawm hydrogen. Cov hydrogen no tuaj yeem raug daig hauv Weld thaum nws txias, tsim cov kab nrib hoom me me uas tsis muaj zog ntawm cov sib koom ua ke. This risk is highest in thick materials, high-carbon steels, or multi-pass welds.
Cov tsis zoo weld zoo: Youenture cuam tshuam Arc ruaj khov, ua rau muaj kev sib luag, thiab tsim kom muaj ntxeem tau los yog pluce weld hlaws dai. Tus pas nrig muaj peev xwm ua cov vends du, muaj zog (ntsuas rau 70,000 psi tensile lub zog) yog nyom.
Thaum qhov cub siv yog yuav tsum tau ua
Qhov cub qhib tsis yog nyob rau hauv feem ntau cov xwm txheej, tshwj xeeb tshaj yog rau kev txhim khu kev qha lossis ntawv pov thawj:
Tom qab qhib lub pob: Hoobkas {-} rods 7018 pas nrig yog qhuav, tab sis ib zaug qhib, lawv pib nqus ya raws. Txawm tias nyob rau hauv nruab nrab av noo (saum 40%), lawv yuav tsum tau muab tso rau hauv kev tuav lub qhov cub tsis pub dhau 1-2 teev kom tiv thaiv kev puas tsuaj.
Nyob rau hauv ib puag ncig huab cua: Kev cob qhia, Chaw Nres Tsheb, lossis Sab Nraud Chaw Nrog Cov Av Av Ntau Tshaj 50% Ua kom nrawm nrawm nqus nqus av nqus. Ncu tsis yog - sib tham ntawm no.
Rau cov ntawv thov tseem ceeb: Cov qauv vuam (txuas hniav, cov tuam tsev), cov nkoj siab, lossis siv cov khoom siv ua tsis tau zoo li Aws D1.1 qhia meej meej yuam qhov no.
Yuav ua li cas siv ncu rau 7018 rods
Ncu Pab ob lub luag haujlwm tseem ceeb: kom qhuav plamp rods thiab ua kom qhuav rods tiv thaiv. Ua raws li cov lus qhia no:
Kom qhuav (rau cov pas dej qhuav):
Yog tias cov pas nrig tau tshaj tawm tsis muaj kev tiv thaiv lossis khaws cia hauv cov huab cua noo, lawv xav tau re -}}}} qhuav kom tshem tawm ya raws.
Kub: 500-600℃f (260-315 degree)
Lub sijhawm: 1-2 teev (sib txawv los ntawm cov pas nrig loj; diamerers loj dua yuav tsum tau ntev dua).
Tuav (rau cia):
Tom qab ziab, cov pas nrig tau khaws cia hauv kev tuav lub qhov cub kom tiv thaiv reagsorbing ya raws kom txog thaum siv.
Kub: 250-300 Degree F (120-150 Qib)
Siv: khaws cov pas nrig ntawm no kom txog thaum npaj txhij mus weld. Tsis txhob tso lawv tawm hauv qhov qhib rau ntau tshaj 10-15 feeb.
Portable ncu rau ntawm -}} chaw haujlwm:
Txog kev ua haujlwm deb ntawm kev cob qhia, siv cov kab txaij portable "(teeb tsa rau 250-300℃f) kom muaj rods qhuav thaum lub sij hawm vuam. Qhov no yog qhov tseem ceeb rau sab nraum zoov lossis av cov chaw ua haujlwm.
Puas muaj kev zam?
Nyob rau hauv qee kis tsis tshua muaj, koj yuav zam dhau Ovens - Tab sis cov no muaj kev pheej hmoo thiab tsis pom zoo rau cov Welds tseem ceeb:
Ultra -} qhov chaw qhuav: Hauv cov suab puam lossis qhov chaw nrog cov av noo qis dua 30%, cov pas nrig tsis tuaj yeem muaj qhov ntev dua. Txawm tias tom qab ntawd, ib zaug qhib, lawv yuav tsum siv li ntawm 30 feeb rau 1 teev (thiab tsuas yog rau qhov tsis {}} tseem ceeb ua haujlwm).
Noog noo - ionistant variants: Qee cov tuam ntxhab muab "noo noo - ruaj khov" 7018 pas nrig nrog cov pleev xim uas tiv thaiv kev nqus. Cov sijhawm yuav khoom ntxiv (piv txwv li, 4-6 teev nyob rau hauv kev kub noo) tab sis tseem xav tau ncu rau kev cia khoom tshaj ntawd.
Yuav muaj dab tsi tshwm sim yog tias koj hla qhov cub?
Skipping cub cia rau 7018 cov pas nrig feem ntau ua rau:
Nrws cia welds: Hydrogen daig hauv Weld ua rau tawg, uas tuaj yeem ua tsis muaj kev ntxhov siab.
Ua tsis tau kev tshuaj xyuas: Hauv cov phiaj xwm tau lees paub (piv txwv li, aws lossis ASME Cov Qauv), Welds ua nrog cov pas dej qhuav yuav tsis lees txais.
Khib thiab ua haujlwm: Tsis zoo Arc ruaj khov thiab welds tsis muaj zog txhais tau tias rov ua haujlwm, siv sijhawm thiab cov khoom siv thiab cov khoom siv.
Hauv qab kab
Yog, 7018 pas nrig xav tau ib qho cubrau feem ntau vuam cov haujlwm. Lawv qhov qis - hydrogen txheej cov kev ua kom zoo rau kev zam cov kab nrib pleb thiab kom ntseeg tau tias muaj zog, txhim khu kev qha welds. Tsuas yog nyob rau hauv huab, tsawg {{{{}} av noo tej yam kev mob (thiab rau qhov tsis {}}}}}} thiab txawm tias nws muaj kev pheej hmoo. Nco ntsoov ua raws li cov khoom lag luam tsim qauv lossis cov lej lag luam (zoo li AWS) rau qhov cub siv.
