Austenitic stainless hlau Hoobkas kev daws teeb meem yuav tsum xa ntau tshaj li cov khoom ua raws-lawv yuav tsum lav qhov kev tiv thaiv corrosion uas muaj sia nyob hauv ntiaj teb kev pabcuam: muaj cov tshuaj chloride siab nyob rau hauv ntug dej hiav txwv hydraulics, thermal cycling nyob rau hauv lub twj tso kua mis vaj tse, los yog abrasive slurry hu nyob rau hauv engineering tsheb winch systems. Ntawm QINGDAO QIANGSENYUAN TECHNOLOGY CO., LTD., peb tau ua ntau tshaj 12,000 austenitic stainless hlau qhov chaw rau lub siab li qub thiab piston twj tso kua mis lub tog raj kheej nyob txij li xyoo 2019 - thiab txhua qhov kev soj ntsuam tsis ua haujlwm tau qhia peb ib yam: kev tiv thaiv corrosion tsis yog ci rau hauv qib. Nws yog forged nyob rau hauv cov txheej txheem tswj.
Corrosion Resistance pib ua ntej machining-tsis tom qab
Ntau tus neeg yuav khoom xav tias ASTM A351 CF8M lossis UNS S31603 cia li sib npaug "corrosion-proof." Lawv yuam kev. Peb tau pom zoo tib yam castings tsis nyob rau hauv ib puag ncig seawater zoo tib yam-ib qho dhau 2,000-teev kev ntsuas ntsev-txhaj tshuaj; lwm pitted hauv 72 teev. Hauv paus ua rau? Tsis chemistry sib txawv - tab sis tsis sib haum xeeb solidification thaum xuab zeb casting. Hauv zos microsegregation tsim chromium-depleted zones raws interdendritic ciam teb. Kev kho tsis tau rov kuaj dua. Nws tau rov tsim kho lub rooj vag, ntxiv cov phiaj xwm txias, thiab tuav cov kua hlau kub hauv ± 5 ° C thaum lub sij hawm nchuav. Qhov ntawd yog li cas peb tuav tus lej ferrite ntawm 5-8 FN hauv txhua CF8M casting-tsim los ntawm kev sojntsuam sib nqus * ua ntej * kev kho cua sov, tsis yog tom qab.
Peb tsis outsource metallurgy. Peb cov ntaub ntawv raw cov ntaub ntawv taug qab txhua qhov cua sov rau cov ntawv xeem ntsuas (MTRs) qhia qhov tseeb Cr, Mo, Ni, thiab N cov ntsiab lus - tsis yog "ua tau raws li spec." Rau cov ntawv thov tseem ceeb xws li AMS 5387 cobalt alloy twj tso kua mis qhov chaw ua haujlwm nrog rau cov tsev nyob austenitic, peb txheeb xyuas cov kev sib raug zoo galvanic los ntawm kev ntsuas qhov qhib-circuit hauv cov kev pabcuam electrolytes simulated. Yog hais tias qhov sib txawv muaj peev xwm tshaj 50 mV, peb kho qhov chaw passivation tsis-txawm tias lub hauv paus alloy yog "yog."
Qhov twg Feem ntau Austenitic Stainless Steel Factory thov tawg
Qee tus neeg muag khoom tout "ISO-certified" cov chaw thaum siv cov khoom siv tes ua haujlwm rau kev tshuaj xyuas zaum kawg ntawm 0.005 mm kam rau siab ncej cov ntawv xov xwm. Peb tsis ua. Txhua qhov austenitic stainless hlau tawm hauv peb lub chaw Qingdao tau txais peb qhov kev kuaj xyuas uas tsis tuaj yeem sib tham:
- Kev txheeb xyuas qhov tseeb ntawm qhov chaw: Dawb-lub teeb interferometry ntawm lub ntsej muag sealing, tsis yog tsuas yog roughness (Ra) qhov tseem ceeb -vim ib tug du nto nrog subsurface tearing caw crevice corrosion.
- Passive txheej validation: Electrochemical impedance spectroscopy (EIS), tsis yog nitric acid dip tests - yog li peb ntsuas oxide thickness thiab qhov tsis xws luag, tsis yog xim hloov xwb.
- Residual stress mapping: X-ray diffraction ntawm 5 qhov chaw tseem ceeb rau ib feem, tshwj xeeb tshaj yog nyob ze cov fillets thiab threads-vim tensile stress saum 200 MPa accelerates SCC hauv chloride ib puag ncig
Ib qho European hydraulic OEM tsis lees paub peb thawj cov khoom xa tuaj ntawm S31603 twj tso kua mis-tsis yog qhov yuam kev loj, tab sis rau qhov seem ntawm kev ntxhov siab nyob ze ntawm lub qhov. Peb tau teb nrog daim ntawv qhia kev ntxhov siab tag nrho, tom qab ntawd rov tsim kho lub clamping fixture thiab ntxiv kev ntxhov siab-relief vibration aging ua ntej zaum kawg machining. Kev xa khoom poob ob lub lis piam. Corrosion lub neej txuas ntxiv los ntawm 18 txog 47 lub hlis hauv kev sim teb. Qhov ntawd yog kev sib pauv-tawm yam tsis muaj ntaub ntawv qhia.
Real-World Performance Demands Real-World Finishing
Machining marks tseem ceeb. Ib qho 0.8 µm Ra tiav tuaj yeem ua tau raws li kev kos duab specs-tab sis yog tias cov qhab nia khiav mus rau qhov sib npaug mus rau kev taw qhia hauv lub cev valve, lawv dhau los ua qhov chaw pib corrosion. Peb taw qhia cov cuab yeej cuab tam kom phim cov kev pabcuam thauj khoom: circumferential rau rotating shafts, axial rau cov tsev nyob zoo li qub, thiab sib xyaw radii ntawm kev hloov pauv. Rau T800 cobalt-based Cheebtsam welded rau hauv cov rooj sib txoos austenitic, peb siv electropolishing * tom qab * vuam - tsis ua ntej - kom tshem tawm cov tshav kub-tshuaj lom oxides yam tsis muaj undercutting lub weld ntiv taw.
Peb qhov kev thov kho dua tshiab tshaj plaws? Passivation nrog citric acid + sodium nitrate es tsis txhob siv cov tshuaj nitric acid. Vim li cas? Vim hais tias citric acid tshem tawm cov hlau dawb yam tsis muaj kev sib cais chromium-tseem ceeb thaum machining duplex-austenitic hybrid qhov chaw. Peb tau lees paub cov txiaj ntsig nrog kev kuaj tooj liab sulfate * thiab * ferroxyl qhov taw qhia kev daws teeb meem, tshuaj xyuas ob qho tib si ntawm qhov huv thiab tsis sib xws ntawm zaj duab xis. Cov neeg siv khoom tshaj tawm 3.2 × tsawg dua qhov kev ua tsis tiav hauv kev teeb tsa ntawm ntug hiav txwv tom qab hloov pauv.
Xaiv lub Hoobkas Austenitic Stainless Hlau txhais tau tias xaiv tus txheej txheem kev koom tes
Yog tias koj daim ntawv thov cuam tshuam nrog kev kub siab, qhov kub siab, lossis kev sib txuas ntawm cov khoom sib xyaw, cov khoom siv tsuas yog qib ib. Kauj ruam ob yog xyuas seb tus neeg muag khoom tswj kev sib cais, kev ntxhov siab, thiab lub xeev ntawm cov khoom siv li cas. Kauj Ruam 3 yog lees paub tias lawv QA tsis nres ntawm qhov kev sib haum xeeb - nws ntsuas tus cwj pwm electrochemical, microstructural homogeneity, thiab kev ua haujlwm ntev.
QINGDAO QIANGSENYUAN TECHNOLOGY CO., LTD. ua haujlwm raws li kev txuas ntxiv ntawm koj pab pawg engineering - tsis yog tus neeg muag khoom. Peb koom tes tshuaj xyuas GD&T callouts rau manufacturability cuam tshuam rau corrosion kuj. Peb chij tej zaum galvanic ob peb ua ntej casting pib. Peb khaws tag nrho cov ntaub ntawv traceability mus rau ladle tooj thiab kub-kho lub voj voog log. Thiab thaum corrosion tshwm sim hauv kev pabcuam, peb tsis xa ib qho kev hloov pauv-peb xa cov ntaub ntawv qhia txog keeb kwm nrog metallurgical hla ntu thiab cov txheej txheem kho.
Txhim khu kev tiv thaiv corrosion tsis tau lees paub los ntawm qib kev xaiv. Nws khwv tau nyob rau hauv lub foundry, proven nyob rau hauv lub lab, thiab validated nyob rau hauv lub teb. Qhov ntawd yog tus qauv txhua lub Hoobkas austenitic stainless hlau yuav tsum tau ntsib - tab sis ob peb ua tau.
