304/304L stainless seamless steel yeeb nkab yog ib qho ntawm cov khoom siv tseem ceeb hauv kev tsim cov yeeb nkab stainless hlau fittings.304/304L stainless hlau yog ib hom chromium-nickel alloy stainless hlau nrog zoo corrosion kuj thiab kub tsis kam, uas yog heev haum rau tsim cov yeeb nkab fittings.
304 stainless hlau muaj qhov zoo oxidation tsis kam thiab corrosion kuj, thiab tuaj yeem tswj tau qhov ruaj khov thiab lub zog ntawm nws cov qauv hauv ntau qhov chaw tshuaj lom neeg.Tsis tas li ntawd, nws kuj muaj kev ua tau zoo thiab kev ua haujlwm zoo, uas yooj yim rau kev ua haujlwm txias thiab kub, thiab tuaj yeem ua tau raws li kev tsim khoom ntawm cov yeeb nkab sib txawv.
Stainless hlau yeeb nkab fittings, tshwj xeeb tshaj yog seamless yeeb nkab fittings, muaj cov kev xav tau siab rau cov ntaub ntawv thiab yuav tsum muaj kev sib khi zoo thiab ua haujlwm siab.304 stainless seamless steel yeeb nkab feem ntau yog siv los tsim ntau yam yeeb nkab fittings vim nws lub zog siab, corrosion kuj thiab du sab hauv, xws li lub luj tshib, tees, flanges, loj thiab me taub hau, thiab lwm yam.
Hauv luv luv,304 stainless hlau seamless yeeb nkabplays lub luag haujlwm tseem ceeb hauv kev tsim cov yeeb nkab stainless hlau fittings, lawv muab kev ua tau zoo thiab txhim khu kev qha zoo, thiab muab qhov tseem ceeb lav rau kev ua haujlwm nyab xeeb thiab kav ntev ntawm cov yeeb nkab fittings.
Yog li ntawd, ua ntej tawm hauv lub Hoobkas nyob rau hauv cov txheej txheem ntawm cov khoom siv raw, nws yuav tsum tau rov qab kuaj dua thiab yuav tsum ua kom tau raws li cov qauv kev cai rau kev tsim cov yeeb nkab fittings.Nov yog qee qhov kev kuaj xyuas kev ua haujlwm ntawm 304/304Lstainless seamless steel yeeb nkab.
01.Corrosion kuaj
304 stainless seamless steel yeeb nkab yuav tsum raug kuaj corrosion raws li cov qauv kev cai lossis cov txheej txheem corrosion tau pom zoo los ntawm ob tog.
Intergranular corrosion test: Lub hom phiaj ntawm qhov kev ntsuam xyuas no yog txhawm rau txheeb xyuas seb cov khoom puas muaj qhov cuam tshuam rau intergranular corrosion.Intergranular corrosion yog ib hom kev txhim kho hauv cheeb tsam uas tsim cov kab nrib pleb ntawm cov ciam teb ntawm cov khoom, thaum kawg ua rau cov khoom tsis ua haujlwm.
Kev ntsuam xyuas corrosion:Lub hom phiaj ntawm qhov kev xeem no yog txhawm rau kuaj qhov corrosion kuj ntawm cov ntaub ntawv nyob rau hauv kev ntxhov siab thiab corrosion ib puag ncig.Kev ntxhov siab corrosion yog ib qho kev txaus ntshai heev ntawm corrosion uas ua rau cov kab nrib pleb tsim nyob rau hauv cov cheeb tsam ntawm cov khoom uas muaj kev ntxhov siab, ua rau cov khoom tawg.
Pitting Test:Lub hom phiaj ntawm qhov kev ntsuam xyuas no yog sim lub peev xwm ntawm cov khoom siv los tiv thaiv pitting hauv ib puag ncig uas muaj chloride ions.Pitting corrosion yog ib qho chaw hauv cheeb tsam ntawm corrosion uas tsim cov qhov me me ntawm cov khoom siv thiab maj mam nthuav mus rau cov kab nrib pleb.
Uniform corrosion test:Lub hom phiaj ntawm qhov kev xeem no yog txhawm rau ntsuas qhov kev tiv thaiv corrosion tag nrho ntawm cov ntaub ntawv hauv ib puag ncig corrosive.Uniform corrosion yog hais txog kev tsim cov oxide txheej los yog cov khoom siv corrosion ntawm cov khoom siv.
Thaum ua cov kev ntsuam xyuas corrosion, nws yog ib qho tsim nyog yuav tau xaiv cov kev ntsuas tsim nyog, xws li corrosion nruab nrab, kub, siab, lub sij hawm raug, thiab lwm yam. , metallographic tsom xam thiab lwm txoj hauv kev ntawm tus qauv.
02.Kev tshuaj xyuas cov txheej txheem kev ua haujlwm
Flattening test: kuaj pom lub peev xwm deformation ntawm lub raj hauv kev ncaj nraim.
Tensile testing: Ntsuas lub zog tensile thiab elongation ntawm cov khoom.
Impact test: Ntsuas qhov toughness thiab cuam tshuam tsis kam ntawm cov khoom.
Flaring test: kuaj qhov tsis kam ntawm lub raj rau deformation thaum lub sijhawm nthuav dav.
Hardness test: Ntsuas tus nqi hardness ntawm cov khoom.
Metallographic xeem: soj ntsuam microstructure thiab theem hloov ntawm cov khoom.
Bending test: Ntsuas qhov deformation thiab tsis ua haujlwm ntawm lub raj thaum khoov.
Kev kuaj tsis muaj kev puas tsuaj: suav nrog eddy tam sim no kuaj, X-ray kuaj thiab kuaj ultrasonic kom paub qhov tsis xws luag thiab tsis xws luag hauv lub raj.
03.Chemical tsom xam
Kev tshuaj xyuas tshuaj ntawm cov khoom siv tshuaj lom neeg muaj pes tsawg leeg ntawm 304 stainless seamless steel yeeb nkab tuaj yeem ua tiav los ntawm kev tshuaj xyuas spectral, tshuaj ntsuam xyuas, lub zog spectrum tsom xam thiab lwm txoj hauv kev.
Ntawm lawv, hom thiab cov ntsiab lus ntawm cov khoom hauv cov khoom tuaj yeem txiav txim siab los ntawm kev ntsuas qhov spectrum ntawm cov khoom.Nws kuj tseem tuaj yeem txiav txim siab hom thiab cov ntsiab lus ntawm cov ntsiab lus los ntawm chemically dissolving cov khoom, redox, thiab lwm yam, thiab tom qab ntawd los ntawm titration lossis ntsuas ntsuas.Lub zog spectroscopy yog ib txoj hauv kev sai thiab yooj yim los txiav txim seb hom thiab cov ntsiab lus ntawm cov khoom siv los ntawm kev zoo siab nrog lub teeb hluav taws xob thiab tom qab ntawd kuaj pom cov X-rays lossis cov yam ntxwv hluav taws xob.
Rau 304 stainless seamless steel yeeb nkab, nws cov khoom siv tshuaj muaj pes tsawg leeg yuav tsum ua tau raws li tus qauv yuav tsum tau ua, xws li Suav tus qauv GB / T 14976-2012 "stainless seamless steel yeeb nkab rau cov dej thauj mus los", uas qhia txog ntau yam tshuaj muaj pes tsawg leeg ntawm 304 stainless seamless steel yeeb nkab. , xws li carbon, silicon, manganese, phosphorus, sulfur, chromium, npib tsib xee, molybdenum, nitrogen thiab lwm yam ntsiab lus ntau yam.Thaum ua cov tshuaj ntsuam xyuas, cov qauv lossis cov lej no yuav tsum tau siv los ua lub hauv paus los xyuas kom meej tias cov tshuaj muaj pes tsawg leeg ntawm cov khoom ua tau raws li qhov yuav tsum tau ua.
Hlau (Fe): Margin
Carbon (C): ≤ 0.08% (304L carbon ntsiab lus ≤ 0.03%)
Silicon (Si): ≤ 1.00%
Manganese (Mn): ≤ 2.00%
Phosphorus (P): ≤ 0.045%
Sulfur (S): ≤ 0.030%
Chromium (Cr): 18.00% - 20.00%
Nickel (Ni): 8.00% - 10.50%
Cov txiaj ntsig no yog nyob rau hauv ntau qhov yuav tsum tau ua los ntawm cov qauv dav dav, thiab cov tshuaj lom neeg tshwj xeeb tuaj yeem raug kho raws li cov qauv sib txawv (xws li ASTM, GB, thiab lwm yam) nrog rau cov chaw tsim khoom tshwj xeeb cov khoom yuav tsum tau ua.
04.Barometric thiab hydrostatic xeem
Kev ntsuas dej siab thiab ntsuas huab cua ntawm 304stainless seamless steel yeeb nkabyog siv los ntsuam xyuas lub siab tsis kam thiab huab cua nruj ntawm cov yeeb nkab.
Kev kuaj Hydrostatic:
Npaj cov qauv: Xaiv cov qauv tsim nyog los xyuas kom meej tias qhov ntev thiab txoj kab uas hla ntawm cov qauv ua tau raws li qhov yuav tsum tau ua.
Txuas cov qauv: Txuas cov qauv mus rau lub tshuab kuaj hydrostatic kom ntseeg tau tias qhov kev sib txuas tau zoo kaw.
Pib qhov kev xeem: Txhaj dej ntawm qhov ntsuas siab rau hauv cov qauv thiab tuav nws rau lub sijhawm teev tseg.Raws li ib txwm muaj, qhov ntsuas siab yog 2.45Mpa, thiab lub sijhawm tuav tsis tuaj yeem tsawg dua tsib vib nas this.
Tshawb xyuas cov dej xau: Saib xyuas cov khoom xau lossis lwm yam kev txawv txav thaum lub sijhawm kuaj.
Sau cov txiaj ntsig: Sau qhov siab thiab cov txiaj ntsig ntawm qhov kev xeem, thiab tshuaj xyuas cov txiaj ntsig.
Barometric Test:
Npaj cov qauv: Xaiv cov qauv tsim nyog los xyuas kom meej tias qhov ntev thiab txoj kab uas hla ntawm cov qauv ua tau raws li qhov yuav tsum tau ua.
Txuas cov qauv: Txuas cov qauv mus rau lub tshuab ntsuas cua kom paub meej tias qhov sib txuas tau zoo kaw.
Pib qhov kev ntsuam xyuas: Txhaj cua ntawm lub siab tshwj xeeb rau hauv cov qauv thiab tuav nws rau lub sijhawm teev tseg.Feem ntau, qhov ntsuas siab yog 0.5Mpa, thiab lub sijhawm tuav tuaj yeem hloov kho raws li xav tau.
Tshawb xyuas cov dej xau: Saib xyuas cov khoom xau lossis lwm yam kev txawv txav thaum lub sijhawm kuaj.
Sau cov txiaj ntsig: Sau qhov siab thiab cov txiaj ntsig ntawm qhov kev xeem, thiab tshuaj xyuas cov txiaj ntsig.
Nws yuav tsum tau muab sau tseg tias qhov kev xeem yuav tsum tau ua nyob rau hauv ib tug haum ib puag ncig thiab tej yam kev mob, xws li kub, av noo thiab lwm yam tsis yuav tsum tau raws li qhov yuav tsum tau ntawm kev xeem.Nyob rau tib lub sijhawm, nws yuav tsum tau ua tib zoo saib xyuas kev nyab xeeb thaum ua qhov kev xeem kom tsis txhob muaj qhov xwm txheej tsis tau xav txog thaum kuaj.
Post lub sij hawm: Lub Xya hli ntuj-26-2023