Koj puas tuaj yeem weld stainless hlau tubing?
Stainless hlau tubing yog dav siv nyob rau hauv ntau yam lag luam rau nws zoo heev corrosion kuj thiab txhua yam khoom. Vuam stainless hlau tubing plays lub luag haujlwm tseem ceeb hauv kev tsim thiab koom nrog cov khoom sib txawv rau cov qauv thiab kev ua haujlwm. Hauv tsab xov xwm no, peb yuav delve rau hauv qhov tshwj xeeb ntawm vuam stainless hlau tubing, nrog rau cov txheej txheem, kev sib tw, thiab kev coj ua zoo tshaj plaws.
Taw qhia rau Stainless Hlau Tubing
Ua ntej peb dhia mus rau hauv cov txheej txheem vuam, cia peb nkag siab dab tsi stainless hlau tubing yog thiab nws cov khoom. Stainless hlau yog ib qho hlau alloy uas tsim los ntawm hlau, nrog rau chromium, npib tsib xee, thiab lwm yam khoom. Qhov sib ntxiv ntawm chromium muab stainless hlau nws cov khoom tiv thaiv corrosion los ntawm kev tsim ib txheej nyias, passive oxide rau saum npoo, tiv thaiv oxidation thiab corrosion ntxiv.
Stainless hlau tubing muaj nyob rau hauv ntau qib, nrog rau cov feem ntau yog 304 thiab 316. Qib 304 stainless hlau yog dav siv rau cov hom phiaj siv, thaum qib 316 stainless hlau yog nyiam rau nws enhanced corrosion kuj, ua rau nws haum rau ntau. xav tau ib puag ncig.
Cov txheej txheem vuam
Vuam stainless hlau tubing koom nrog ob lossis ntau qhov ntawm cov tubing ua ke los ntawm kev tsim kom muaj kev ruaj khov thiab ruaj khov. Feem ntau siv vuam txheej txheem rau stainless hlau tubing yog TIG (Tungsten Inert Gas) vuam thiab MIG (Hlau Inert Gas) vuam.
TIG vuam yog ib qho kev xaiv nrov rau stainless hlau vim nws qhov tseeb thiab ntau yam. Cov txheej txheem no yog siv cov tungsten electrode uas tsis yog siv los tsim cov arc thiab shielding gas, feem ntau argon, los tiv thaiv thaj tsam weld los ntawm atmospheric paug. TIG welding muab kev tswj xyuas zoo tshaj plaws ntawm cov khoom siv hluav taws xob thiab tso cai rau kev tsim cov hlaws zoo nkauj.
MIG welding, ntawm qhov tod tes, yog qhov ua tau zoo thiab ceev vuam txheej txheem tsim nyog rau cov haujlwm loj. Nws siv cov khoom siv hluav taws xob siv hluav taws xob uas melts los ua cov vuam, nrog rau cov roj tiv thaiv, feem ntau yog sib xyaw ntawm argon thiab carbon dioxide. MIG welding muaj qhov tso nyiaj ntau dua thiab kawm tau yooj yim dua piv rau TIG vuam.
Kev sib tw hauv Vuam Stainless Hlau Tubing
Vuam stainless hlau tubing nthuav qhia qee qhov teeb meem uas yuav tsum tau daws kom ntseeg tau tias muaj kev vam meej thiab zoo welds. Qee qhov kev sib tw uas muaj xws li:
1. Kub tawg: Stainless hlau muaj cov thermal conductivity qis dua piv rau lwm cov hlau, ua rau nws yooj yim rau kub tawg thaum vuam. Kub tawg tshwm sim vim qhov txias txias thiab solidification ntawm molten weld hlau, ua rau nws tawg. Kev tswj xyuas kom zoo ntawm cov cua sov nkag thiab preheating tuaj yeem pab txo qhov tshwm sim ntawm kub tawg.
2. Intergranular corrosion kuj: Vuam stainless hlau tuaj yeem ua rau rhiab heev, qhov chaw uas muaj cua sov ua rau muaj kev cuam tshuam rau intergranular corrosion. Qhov no tshwm sim vim nag lossis daus ntawm chromium carbides raws cov ciam teb nplej, depleting cov khoom siv corrosion kuj. Tom qab-weld kev kho cua sov los yog kev siv cov hlau tsis tshua muaj carbon cov ntsiab lus tuaj yeem pab tiv thaiv intergranular corrosion.
3. Distortion: Stainless hlau muaj cov coefficient siab ntawm thermal expansion, uas txhais tau hais tias nws nthuav thiab cog lus ntau dua li lwm cov ntaub ntawv thaum vuam. Qhov no tuaj yeem ua rau distortion lossis warping ntawm cov khoom siv welded. Kev txhim kho kom zoo, clamping, thiab tswj cov txheej txheem txias txias yog qhov tseem ceeb kom txo qis kev cuam tshuam.
4. Thaum tshav kub kub-cuam tshuam cheeb tsam (HAZ) discoloration: Thaum lub sij hawm welding, thaj tsam kub-tshuaj ntawm stainless hlau tubing tuaj yeem tsim kev puas tsuaj, xws li kub mus rau xiav ntxoov ntxoo. Qhov kev hloov pauv no feem ntau yog qhov teeb meem zoo nkauj tab sis kuj tuaj yeem qhia txog kev hloov pauv ntawm cov khoom siv khoom siv. Pickling nrog cov kua qaub tsim nyog los yog cov tshuab polishing tuaj yeem tshem tawm cov xim.
Cov kev coj ua zoo tshaj plaws rau Vuam Stainless Hlau Tubing
Yuav kom ua tiav cov welds zoo hauv stainless hlau tubing, qee qhov kev coj ua zoo tshaj plaws yuav tsum tau ua raws. Cov kev coj ua no suav nrog:
1. Kev npaj kom raug: Xyuas kom meej tias cov tubing qhov chaw huv si, tsis muaj kab mob, thiab ua kom haum ua ke ua ntej vuam. Txhua cov roj seem, av, lossis oxides tuaj yeem ua rau cov vuam tsis zoo thiab muaj peev xwm ua tsis tau.
2. Xaiv txoj cai muab tub lim hlau: Xaiv cov hlau muab tub lim haum yog qhov tseem ceeb rau kev vuam stainless hlau tubing. Kev sib txuam lossis me ntsis zuag qhia tag nrho cov hlau muab tub lim nrog cov qib hlau hauv qab pab tswj kev tiv thaiv corrosion thiab txhua yam khoom.
3. Tswj cua sov input: Kev tswj cov cua kub tawm thaum lub sij hawm vuam yog qhov tseem ceeb los tiv thaiv cov teeb meem xws li kub tawg thiab distortion. Ua kom nrawm nrawm mus los, siv qhov tsim nyog tam sim no thiab qhov hluav taws xob, thiab xav txog kev kho cua sov ua ntej lossis tom qab vuam raws li qhov tsim nyog.
4. Shielding gas xaiv: Qhov kev xaiv ntawm kev tiv thaiv roj cuam tshuam qhov zoo thiab cov khoom ntawm cov vuam. Argon yog feem ntau siv shielding roj rau stainless hlau vuam, muab kev tiv thaiv zoo heev tiv thaiv atmospheric paug.
5. Rov qab purging: Nyob rau hauv cov xwm txheej uas qhov backside ntawm cov vuam siv tau, rov qab purging nrog cov roj inert tuaj yeem tiv thaiv oxidation thiab txhim kho weld zoo. Qhov no yog qhov tseem ceeb tshwj xeeb rau cov ntawv thov uas qhov kev tiv thaiv corrosion yog qhov tseem ceeb.
6. Tom qab vuam tu thiab passivation: Tom qab vuam, nws yog ib qho tseem ceeb uas yuav tsum tau ntxuav lub welded stainless hlau tubing kom tshem tawm tej yam kab mob, xws li kub tint, spatter, los yog lwm yam residues. Passivation, tshuaj kho mob, tuaj yeem ua tau los txhim kho cov khoom siv corrosion.
Xaus
Hauv kev xaus, welding stainless hlau tubing yog txheej txheem tshwj xeeb uas yuav tsum tau ua tib zoo saib xyuas kom meej kom ua tiav cov khoom zoo thiab ruaj khov. Kev nkag siab txog cov teeb meem tshwj xeeb, xws li kub tawg, kev sib tsoo ntawm intergranular, distortion, thiab discoloration, yog qhov tseem ceeb rau kev ua tiav vuam. Los ntawm kev ua raws li cov kev coj ua zoo tshaj plaws, suav nrog kev npaj kom raug, xaiv cov hlau muab tub lim, tswj cov khoom siv hluav taws xob, thiab kev siv roj thaiv kev tsim nyog, ib tus tuaj yeem ua kom muaj kev ncaj ncees thiab ua kom zoo tshaj plaws ntawm stainless hlau tubing hauv ntau daim ntawv thov.
