1 Khoom Description
Titanium muaj tshuaj lom neeg ua haujlwm siab thiab muaj kev sib raug zoo nrog oxygen, nitrogen thiab hydrogen hauv huab cua. Tshaj 600 degree, titanium pib nqus oxygen thiab yaj rau hauv titanium. Hydrogen absorption pib tshaj 300 degree thiab nitrogen nqus pib siab tshaj 700 degree. Oxygen thiab nitrogen yuav ua rau kom lub zog thiab hardness ntawm titanium thiab txo nws cov plasticity. Nitrogen muaj kev cuam tshuam ntau dua li cov pa oxygen. Hydrogen yuav txo qis qhov cuam tshuam ntawm cov hlau weld, tab sis cov yas yuav txo qis, ua rau hydrogen embrittlement.
2 Kev tu thiab kev tiv thaiv ntawm titanium cladding ntawm GR2 Titanium Clad Steel Phaj rau kev lag luam
Rau titanium clad welds, qhov chaw ntawm oxygen, hydrogen thiab nitrogen yuav tsum nruj me ntsis tswj. Oxygen, hydrogen thiab nitrogen tsis yog los ntawm huab cua xwb, tab sis kuj los ntawm lwm yam impurities uas yuav yaj mus rau hauv lub pas dej molten. Ntxiv nrog rau kev ua kom lub zog ntawm titanium weld zuj zus thiab txo qhov corrosion kuj ntawm cov vuam, cov impurity ntsiab kuj yog lub hauv paus ua rau cov roj qhov hauv qhov vuam. Yog li ntawd, nyob rau hauv cov txheej txheem ntawm kev ua haujlwm vuam, qhov vuam ib puag ncig, kev ntxuav ntawm qhov zawj thiab kev tiv thaiv ntawm vuam yog qhov tseem ceeb tshwj xeeb.
3Vuam ib puag ncig
Cov fume muaj ntau yam teeb meem impurities, uas tau yooj yim hloov mus rau hauv lub pas dej ua ke thiab weld los ntawm ib puag ncig, tsim vuam tsis xws luag. Tshwj xeeb tshaj yog thaum muaj cov pa phem hlau hauv qhov chaw ua haujlwm, cov khoom siv kho tshuab thiab corrosion kuj ntawm cov welded sib koom yuav raug txo, thiab vuam tawg yuav tshwm sim nyob rau hauv loj heev. Yog li ntawd, thaum vuam txheej titanium, xyuas kom cov huab cua hauv cheeb tsam no huv si, tsis muaj plua plav thiab tsis muaj pa luam yeeb. Tsis tas li ntawd, cov dej noo nyob rau hauv cov huab cua muaj kev cuam tshuam zoo rau kev vuam, uas kuj yog ib qho ntawm cov laj thawj tsim cov pores. Qhov siab dua qhov txheeb ze ntawm huab cua, nws yooj yim dua los tsim cov pores. Thaum cov av noo tshaj 90 feem pua, nws yog ib qho yooj yim los tsim cov pores nyob rau hauv weld. Raws li kev paub dhau los, yog tias huab cua txheeb ze tswj tau qis dua 70 feem pua, qhov vuam porosity tshwm sim los ntawm cov av noo tuaj yeem tswj tau zoo. Cov cua ceev thaum lub sij hawm vuam yuav tsum ua raws li cov hauv qab no: cua ceev thaum lub sij hawm electrode arc vuam yuav tsum tsis txhob ntau tshaj 8ms, thiab qhov ceev ntawm argon tungsten arc vuam yuav tsum tsis txhob ntau tshaj 2m / s. Lub ambient kub yuav tsum tsis txhob qis dua - 5 degree, thiab lub phaj ntsuas kub yuav tsum tsis txhob qis dua 5 degree. Kev tiv thaiv yuav tsum tau ua thaum vuam nyob rau hauv nag thiab daus.
4 Ntxuav ua ntej vuam
Titanium cladding thiab vuam hlau yog ib qho yooj yim uas yuav kis tau, xws li lubricant residue, oxide zaj duab xis, roj stain, xim txheej thiab cov ntiv tes siv los tsim GR2 Titanium Clad Steel Phaj rau Kev Lag Luam. Yog tias cov pa phem no tsis raug tshem tawm ua ntej welding, cov impurities tsis zoo yuav raug yaj hauv cov hlau vim yog thermal ua haujlwm ntawm cov arc thaum vuam, uas yuav muaj kev cuam tshuam tsis zoo rau cov vuam zoo. Yog li ntawd, pre-welding tu yog ib feem tseem ceeb ntawm kev vam meej vuam ntawm titanium txheej. Ua ntej welding, vuam hlau yuav tsum huv thiab qhuav. Ua ntej siv, oxidized ib feem ntawm qhov kawg ntawm cov vuam hlau yuav tsum raug txiav tawm, thiab cov oxide thiab roj ntawm qhov chaw yuav tsum tau muab tshem tawm nrog daim ntawv abrasive thiab acetone.
5 Titanium txheej tiv thaiv
Txhawm rau tiv thaiv cov titanium txheej los ntawm kev ua qias tuaj thaum lub sijhawm vuam, 1 hli stainless hlau phaj yog siv los tiv thaiv thaj tsam 25 hli ntawm ob sab ntawm titanium vuam, thiab tag nrho titanium txheej yog tiv thaiv thaum lub hauv paus txheej vuam.
6 Ua khub
(1) Thaum lub sij hawm sib dhos, cov titanium txheej yuav tsum tau muab coj los ua tus qauv, thiab qhov kev sib tw yuav tsum tsis txhob ntau dua 1 hli. Lub misalignment yuav tsum tau nruj me ntsis tswj kom tsis txhob muaj qhov vuam zoo ntawm titanium txheej los ntawm kev cuam tshuam vim yog misalignment ntau dhau.
(2) Tack welds tsuas yog tso cai rau ntawm lub hauv paus hlau thiab yuav tsum tau nqa tawm ntawm lub hauv paus. Cov khoom siv vuam siv rau kev sib dhos thiab qhov chaw yuav tsum yog tib yam li cov khoom siv rau kev siv vuam.
(3) Yog tias qhov tsis zoo los ntawm kev tawg ntawm tack vuam seam tshaj tus qauv, nws yuav tsum raug kho ua ntej vuam.
7 Lub hauv paus welding
(1) Cov txheej txheem vuam txheej txheem tsis tuaj yeem siv rau kev vuam ntawm carbon steel puag. Thaum lub sij hawm rov qab vuam, me me-inch vuam pas nrig yuav tsum tau siv, thiab tawg arc vuam yuav tsum tau saws. Ib leeg-sided welding thiab ob-sided txheej txheem yuav tsum tau saws. Lub zog ntawm lub nraub qaum vuam yuav tsum yog 0.5 ~ 1mm kom tsis txhob kho lub nraub qaum weld. Cov welding loj yuav tsum tau siv rau kev txhaws thiab capping vuam, thiab cov cua kub nkag yuav tsum tsis txhob loj dhau thaum vuam. Kev siv hluav taws xob ntau dhau yuav ua rau cov titanium txheej yuav oxidized vim qhov kub thiab txias, los yog ua rau muaj teeb meem xws li qhov txo qis ntawm lub zog sib txuas ntawm cov phaj sib txuas thiab kev sib txuas sib txuas.
(2) Lub interlayer kub yuav tsum tau tswj hauv qab 150 degree.
(3) Thaum vuam thiab polishing, kev saib xyuas yuav tsum tau them rau kev tiv thaiv ntawm titanium txheej kom tsis txhob muaj kev sib kis ntawm titanium txheej los ntawm arc vuam spatter thiab polishing spatter.
(4) Tom qab vuam ntawm cov pa roj carbon steel puag, lub vuam siv lub nraub qaum yuav tsum yog hauv av du.
(5) Lub tack weld yuav tsum tau welded nyob rau hauv cov pa roj carbon steel puag, thiab misalignment yuav tsum tsawg tshaj li 1 hli.
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