Yuav Siv Cast Iron Vuam Rods li cas?

Cam khwb cia hlau vuam electrodes, vim lawv cov ntsiab lus carbon siab, tsis sib xws microstructure, tsis tshua muaj zog, thiab tsis tshua muaj plasticity, yog cov ntaub ntawv uas tsis zoo weldability, ua rau lawv muaj feem xyuam rau tawg thaum vuam. Qhov txias txias sai heev tom qab vuam tau yooj yim ua rau cov hlau cam khwb cia dawb, ua rau muaj teeb meem hauv machining. Txhawm rau ua tiav cov txiaj ntsig zoo hauv kev vuam thiab kho cov cam khwb cia hlau, nws yog ib qho tseem ceeb uas yuav tsum ua raws li "30% cov khoom siv, 70% txheej txheem," txhais tau hais tias tsis yog tsuas yog xaiv cov vuam electrodes tseem ceeb, tab sis kuj tseem siv cov txheej txheem vuam tsim nyog yog qhov tseem ceeb.

Cov txheej txheem vuam hauv qab no raug pom zoo rau kev siv thaum vuam thiab kho cam khwb cia hlau:
 

• Workpiece tu: Ua tib zoo tshem cov roj, xeb, noo noo, thiab lwm yam impurities ntawm qhov vuam; rau cam khwb cia hlau qhov chaw siv nyob rau hauv siab - kub los yog chav ib puag ncig rau lub sij hawm ntev, kuj tshem tawm cov pa roj carbon monoxide - depleted txheej thiab oxide txheej.
• Beveling thiab cracking lub qhov: Npaj U-zoo li tus lossis V-puab bevels raws li cov duab tsis xws luag, thiab xyaum tawg ntes qhov ntawm ob qhov kawg ntawm qhov tawg kom tiv thaiv kev tawg.
• Preheating: Rau tuab los yog loj workpieces los yog daim ntaub ntawv uas yuav tsum tau siab, preheat rau 300-600℃(qhov tshwj xeeb kub nyob ntawm qhov luaj li cas ntawm lub workpiece) kom txo vuam kev nyuaj siab.

• Kev ziab: Ua ntej siv, vuam electrodes yuav tsum tau ci ntawm kwv yees li 150℃rau 1-2 teev kom tshem tawm cov dej noo ntawm txheej.
• Kev xaiv: Feem ntau siv cam khwb cia hlau vuam electrodes muaj xws li Z308 (nickel ntshiab) thiab Z508 (nickel{2}}tooj liab), xaiv raws li qhov muaj pes tsawg leeg ntawm lub hauv paus hlau thiab lub zog xav tau; rau qhov tsis yog-load-cov kabmob, qhov qis dua - nqi 506 vuam electrode kuj tseem siv tau.

• Tam sim no thiab Polarity: Siv DC zoo (DC +) lossis AC / DC dual- lub hom phiaj; Tam sim no yuav tsum tsis tshua muaj, piv txwv li, 90-100A rau φ3.2mm electrodes thiab 130-160A rau φ4mm electrodes.
• Arc thiab Electrode Movement: Ua kom luv luv arc thiab nqaim weld hlaws; Txhua lub hlaws hlaws yuav tsum tsis pub tshaj 50 hli ntev, thiab cov electrode oscillation amplitude yuav tsum tsis pub tshaj 1.5 npaug ntawm txoj kab uas hla electrode.
• Segmented Vuam: Ntev welds yuav tsum siv hla vuam, rov qab - thiab - vuam, los yog symmetrical vuam kom tsis txhob muaj cua sov.

• Rauj: Tam sim ntawd tom qab txhua qhov dhau mus, maj mam coj mus rhaub lub vuam nrog rauj me me kom txog thaum cov vuam ripples ploj mus tso tawm kev ntxhov siab.
• Interpass Temperature: Tos kom lub vuam kub poob qis dua 60℃ua ntej vuam qhov txuas ntxiv.
• Txiav-tawm: Sau lub qhov cub kom tiv thaiv kev tawg ntawm qhov txiav -tawm taw tes.

• Cua sov thiab txias txias: Tom qab vuam, ua kom sov qhov chaw nyob ib ncig ntawm lub vuam nyob rau hauv 200mm mus rau 300-350℃thiab tuav rau 30 feeb. Tom qab ntawd npog nrog asbestos hmoov thiab txias maj mam.
• Machining: Yog xav tau machining, nws raug nquahu kom anneal lossis txhaj tshuaj peening nto tom qab vuam los txhim kho machinability.

• Hnav lub npog ntsej muag thiab hnab looj tes tiv thaiv kom tsis txhob muaj qhov kub hnyiab thiab cov hlau tawg.
• Xyuas kom qhov cua zoo thiab tsis txhob nqus cov pa welding.