Kev tshaj tawm chromium pretreatment technology los tiv thaiv aluminium thiab zinc

Jul 20, 2020

Tso lus

US Naval Aviation Center tsim cov thev naus laus zis uas siv trivalent chromium pretreatment (TCP) thev naus laus zis thiab kev siv tshuab kho tom qab kom zoo tiv thaiv txhuas thiab zinc cov khoom tsis muaj teeb meem ib puag ncig. Cov tshuab no tau coj mus rau tom khw los ntawm German tuam txhab SarTec International. Txhawm rau txhawm rau txhim kho qhov kev txhim kho corrosion thiab xim pleev xim rau ntawm cov txhuas alloys, nrog rau kev ua tau zoo ntawm anodized aluminium thiab pleev xim txheej, kev kho saum npoo yog tsim nyog. TCP yog tsuas yog tsis yog-hexavalent chromium txheej, uas ua tau raws li qhov yuav tsum tau ua ntawm kev siv tub rog tshwj xeeb rau txhuas cov tshuaj tiv thaiv thiab kev kho tom qab. Nws kuj tseem tuaj yeem txhim kho qhov ua kom zoo, ua nws cov khoom zoo rau cov khoom siv hluav taws xob thiab kev sib txuas lus.

Nano zaj duab xis deposition thev naus laus zis ua cuab yeej sib txawv zaj duab xis

Qhov txheej txheem ntawm nano-film txheej txheem no tau muaj ntawv sau los ntawm Tegal, Asmeskas. Siv cov txheej txheem no, cov nyom, cov noob tooj liab, thiab qib siab K-dielectrics tuaj yeem ua rau microprocessors thiab cov khoom siv nco. Cov kab ke thiab txoj kev tau ua yav dhau los tsis muaj peev xwm ua rau nano-pu zaj duab xis deposition (MLD). Piv nrog piv rau atomic txheej deposition, NLD tuaj yeem tau txais qhov tseeb siab tshaj qhov kev loj hlob: piv nrog cov tshuaj vapor tso cia, NLD muaj qhov muaj zog ntau lawm. ND tuaj yeem xaiv ntau yam ua ntej, thiab tuaj yeem siv los tsim cov khoom siv ntau, cov txheej txheem zaj duab xis, nws cov peev txheej tswj tau muaj zog heev. Cov txheej txheem tseem suav nrog lub tshuab nqus ntshav plasma deposition tshuab rau kev loj hlob ntawm ntau yam ntawm nyias cov ntaub ntawv zaj duab xis, xws li titanium nitride, tooj liab thiab qee cov ntaub ntawv insulating zaj duab xis. Cov mem tes thev naus laus zis tseem tsim rau kev rwb thaiv tsev cais tawm rau K-tiv thaiv tus yam ntxwv.

Lub plasma qhov chaw hauv qhov system hauv NLD yog tus kauv uas siv hluav taws xob. Lub system suav nrog ntau chav kev sib tw ua haujlwm rau ntau cov txheej txheem xws li kev kho ua ntej tu, MLD thiab densification.

Titanium-txhim kho howitzer chim ua los ntawm kev sib hloov

M77 lub teeb 15m howitzer (LW155) yog rab phom siv los hloov kho cov hlau qub uas muaj zog dua M98155mm howitzer, uas tau siv nyob rau hauv Asmeskas Tub Rog Tub Rog thiab Tub Rog. Lub cev ntim ntawm L155 menyuam txaj tuaj yeem pab txhawb nqa lub pob tawb thiab qhov system los tiv thaiv. Nws yog cov khoom siv siv los ntawm National Center rau Txhim Kho Hlau Zauv Siv Tshuab (NCEMT) siv T6A4V los txhim kho kev ua haujlwm. NCEMT tab tom sim los txiav txim siab txog kev ua cov txheej txheem rau lub thoob kom txo cov nqi thiab tsim cov khoom pov tseg tsawg tshaj li cov txheej txheem tam sim no.

NCEMT txiav txim siab los siv txheej txheem tshiab hu ua spinning. Cov Khoom Siv Hluav Taws Xob Ua Haujlwm (DMW) tau tsim cov txheej txheem kiv kiv los tsim cov kav hlau no. Raws li qhov tshwm sim, DMW tau tsim qhov loj tshaj plaws ntawm T-6A-4V lub tog raj kheej uas tsis tau pom dua ib zaug, muaj txoj kab uas hla 142.

cm, ntev 183cm.

Kev sib tsoo yog lub txias tsim txheej txheem uas tuaj yeem tsim cov hollow thooj voos kheej kheej nrog qhov ntev. Vim tias nws muaj qhov raug, qhov txheej txheem no tau dav siv hauv aerospace thiab tub rog cylindrical Cheebtsam. Thaum lub sijhawm tig mus rau ib txheej txheem, tuab-phab ntsa T5A4V alloy lub tog raj kheej yog tig ib ncig ntawm txoj kab hluav taws xob ejector pas nrig los ntawm kev sib hloov ntawm cov menyuam siab kom txog thaum nws mus txog qhov loj me. Txij li yuav luag 10% ntawm cov ntaub ntawv nyoos yog khaws cia, cov txheej txheem spinning zoo heev txo cov pov tseg tau tsim los ntawm cov khoom siv uas muaj nqi ntau. Raws li cov kev ua tiav zoo, kev cia siab tias cov txheej txheem tuaj yeem siv hauv lwm cov cuab yeej siv phom