1. Dab tsi yog cov tshuaj lom neeg muaj pes tsawg leeg ntawm titanium bar itm b348 gr9, thiab nws yuav cuam tshuam li cas rau lub bar cov khoom?
Titanium Bar Astm B348 Gr9 yog + titanium alloy, txhais tau tias yog titanium (al), nrog cov pa roj ntsha (0.08% hydrogen, 0.015% hydrogen, 0.05% nitrogen).
Txhuas stetilizes the -}}} kub ua kom muaj zog thiab corrosion zog, txhim kho ductility, txhim kho - ua haujlwm. Qhov no dual {{5 5}}} theem sib xyaw ua ke yog li ntawm 620] nrog lub zog ntshiab ntawm 620 xyoo (14% min elongation) rau kev sib sau. Cov qib tsis loj dua cov qib txuas ntxiv txhawb kev txhim kho corrosion-}}}}}}}} Tus tseem ceeb ntawm dej hiav txwv lossis tshuaj lom neeg ua haujlwm.
2. Qhov kev lag luam twg thiab cov ntawv thov ua ntu ntu Titanium Bar Astm B348 Gr9, thiab dab tsi ua rau nws haum rau nws?
Gr9 yog dav siv hauv peb qhov kev lag luam tseem ceeb vim nws cov khoom sib npaug:
Aerospace: nws tau siv rau tsis - cov qauv sib xyaw ua ke zoo li cov hlab lag luam, roj kab, thiab lub cav ntoo. Nws lub teeb yuag (tuab li 4.5 g / cmÃ, 50% sib dua dua li hlau) txo lub zog tiv taus siab thiab kev co. Tsis zoo li siab - muaj zog alloys (piv txwv li, Gr5), Gr9 tus qauv zoo dua yooj yim los ua cov raj sib txawv.
Tubrog nkoj & Daveore: Gr9 yog qhov zoo tagnrho rau seasater- Cov kav dej hauv av (dej hiav txwv rau cov kav dej, thiab cov tshuaj tiv thaiv kab mob taub hau). Nws corrosion resistance pa roj carbon hlau thiab txawm tias qee qhov stainless hlau hauv chloride ib puag ncig, tiv thaiv pitting thiab crevice corrosion uas ua rau muaj kev ua tsis tiav.
Tshuaj lom neeg: Nws tau siv rau kev ua kom sov pa roj, valve stems, thiab Twj txheej txheem. Nws tiv thaiv cov tshuaj corrosive (sulfuric acid, chlorine) thiab muaj qhov kub ntxhov (txog 31-} alloy titanium yuav raug overengineered. Nws ductility tseem tso cai rau fabrication ntawm kev cai fittings rau cov cuab yeej siv tsis xwm yeem.
3. Yuav ua li cas yog titanium bar itm b348 gr9 tsim, thiab dab tsi ua kom ua kom nws zoo?
Cov txheej txheem tsim khoom yog txiav rau khaws gr9 lub dual -} pay txheej qauv:
MELTING: Titanium Daim Hmab, Txhuas, thiab Vanadium tau Melted hauv lub tshuab hluav taws xob ARCOY faib tawm (piv txwv li, hydrogen, uas ua rau emgrittlement). Cov kab mob uas tiv thaiv atmosphricer, qhov tseem ceeb rau kev tswj cov alloy yog corrosion tsis kam.
Kub - ing} Ua haujlwm kub -}}}}}}}}}}}}}}}}}}}}} Ua kom tawg kom khaws cov + theem. Nws yog qhov txuas ntxiv kub los txo txoj kab uas hla, nrog kev sib tw nruab nrab ntawm 700-750℃los daws kev ntxhov siab thiab tswj kev ntxhov siab.
Txias -} Ua haujlwm & Xov Xwm Ua Ntej: Txias} {1} {1} 0.25 mm rau me ntsis diameters). Ib kauj ruam kawg nkaus (650 {5,}} 700 degree, ua kom zoo dua rau + microstructure thiab ntsuas hluav taws xob thiab ductility. Nto kho xws li pickling (hydrofluoric-nitric acid daws) tshem tawm oxide nplai thiab kom muaj tsawg dua (ra tsawg dua lossis sib npaug rau 1.6 μm).
4. Dab tsi cov kev ntsuas zoo yog xav tau rau titanium bar ovm b348 gr9 kom tau raws li ASTM cov qauv?
ASTM B348 yuam kom nruj nruam los xyuas kom meej Gr9 tuav raws:
Chemical Composition Testing: Optical Emission Spectroscopy (OES) verifies Al and V content within the specified range, while X-Ray Fluorescence (XRF) checks for trace impurities. Qhov no txwv tsis pub tawm ntawm- spec aleces uas tuaj yeem ua tsis tau kev pabcuam.
Mechanical Property Testing: Tensile tests measure strength and elongation (per ASTM E8), with samples cut from the bar's cross-section to ensure uniformity. Kev kuaj Hardness (Rockwell B Nplai, 80-90 HRB) lees paub lub zog sab nraud yam tsis muaj lub zog ua kom tsis txhob ua li lub bar.
Tsis - Kev sim (NDT): Ultrasonic kev sim (U, ib astm AGIST (tawg, suav) nrog 0.5 mm rhiab. Eddy kev sim tam sim no (ect, per uttm e243) tshuaj xyuas qhov chaw rau cov khawb lossis cov pits uas yuav tsum tau ua rau aerospacacac / marine apps.
Deg thiab Nto tshev Nto: Micrometers ntsuas txoj kab uas hla ntawm ntau lub ntsiab lus los xyuas kom meej raws li Astm kev pab cuam). Tus profatometer lees paub txog kev ua kom muaj qhov tseeb ntawm qhov chaw, thiab kev soj ntsuam pom tsis lees txais cov kab nrog dents lossis tsis sib xws.
5. Yuav Titanium Bar Astm B348 Gr9 yuav welded lossis txias - Tsim, thiab dab tsi ceevfaj?
Yog lawm, Gr9 yog weldable thiab txias - tsim muaj, tab sis kev ceev faj tshwj xeeb siv:
Vuam: Nws yog feem ntau welded ntawm roj tungsten arc vuam (gtaw / tig) nrog oxygen ua kom zoo tshaj 500 degree, ua rau emgrittlement). Muab tub rog muab tub rog (piv txwv li, {{- 9) ntais ntawv gr9 cov lus muaj zog thiab corrosion tsis kam. Tom qab Weld Annealing (650-700 degree) relieves residual kev ntxhov siab, tseem ceeb rau qhov chaw uas siv hauv cyclic chaw thau khoom (piv txwv li, aerospace hlab).
Txias - Txoj kev sib sau: Gr9 tus ductility tso cai, thiab kos duab, tab sis kos duab, tab sis ua haujlwm ntau dhau los. Nruab nrab annealing (700 degree) yog xav tau tom qab kev sib tw hnyav los rov ua haujlwm. Cov cuab yeej yuav tsum yog huv thiab lubricated nrog titanium {{{}}} Tshaj roj kom tsis txhob muaj qhov tsis xws luag tuaj yeem dhau los ua kev pib corrosion.
