T73 Ƙayyadaddun Tsufa na Artificial don Faranti, Fitar da Ƙarfafawa

Daga cikin kayan aluminium don motocin sararin samaniya a kasar Sin, 7A09 alloy yana daya daga cikin manyan abubuwan da aka fi so don manyan sassan tsarin da aka damu. Samfuran da aka kammala da su sun haɗa da faranti, tubes, sanduna, bayanan martaba, bututu masu kauri, ƙirƙiras, da sauransu. Abubuwan sinadaran sun fi dacewa fiye da na 7A04 alloy, don haka yana da cikakkiyar aiki kuma ya zama ɗaya daga cikin manyan kayan zane. Abubuwan sinadaransa (mass%): 0.5Si, 0.5Fe, (1.2-2.0) Cu, 0.15 Mn, (2.0-3.0) Mg, (0.16-0.30) Cr, (5.1-6.1) Zn, 0.10Ti, sauran najasa daban-daban 0.05, jimlar 0.10, sauran kuma Al.

7A09 gami yana da kyawawan kaddarorin ƙirƙira a cikin jahohin jiyya da warwarewa. Bayan tsufa na wucin gadi, abubuwan da aka samo asali sun kasance ƙananan, kuma raunin da ya faru yana da gamsarwa a cikin jihar T6; ko da yake ƙarfin da ke ƙarƙashin T73 overaging jihar yana da ƙasa fiye da wannan a cikin jihar T6, Yana da kyakkyawar juriya ga lalata lalata kuma yana da tsayin daka. T76 abu yana da babban juriya ga spalling da lalata. T74 yana da babban ƙarfi da juriya ga lalata lalatawar damuwa a lokaci guda.

Ƙarfin ƙarfi na Rm na 7A09 alloy ya fi na 2A12 da 2A14 aluminum gami, kuma juriyar lalatawar damuwa ta fi nasu girma. Sabili da haka, yin amfani da shi don kera sassan jirgin sama ba kawai yana da tasirin rage nauyi ba, har ma yana da aminci mafi girma. Don haka, ƙarfin gajiyarsa bai ƙaru daidai ba. Sabili da haka, ya zama dole a yi la'akari da wannan batu sosai yayin zayyana abubuwan da aka fi dacewa da nauyin gajiya. Lokacin da zafin jiki ya tashi, ƙarfin 7A09 alloy yana raguwa da sauri, don haka zafin aikinsa kada ya wuce 125 ° C.

Ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙaddamarwa na 7A09 alloy: 290 ℃ - - 320 ℃, 2h - - 4h, sanyaya iska; cikakken bayani dalla-dalla: (390 ℃ — — 430 ℃) / (0.5h — — 1.5h), tare da ≤30 ℃ / h The sanyaya kudi kasa ko daidai da 200 ℃, sa'an nan iska-sanyaya daga cikin tanderu.

The bayani magani zafin jiki na wannan gami ne 460 ℃ — 475 ℃, amma magani zafin jiki na aluminum-sanya takardar ya zama m fiye da ƙananan iyaka, ba fiye da sau 2, don haka kamar yadda ya hana gami abubuwa daga shiga cikin aluminum- clad Layer kuma rage juriya na lalata kayan. Matsakaicin sanyaya shine zafin jiki, ruwan dumi ko wani matsakaicin dacewa, canja wuri bai kamata ya wuce 15s ba. The aiki zafin jiki na T6 farantin ne (135 ℃ ± 5 ℃) / (8h-16h), da kuma sauran kayan, shi ne (140 ℃ ± 5 ℃) / 16h. Dubi tebur don ƙayyadaddun ƙayyadaddun tsufa na wucin gadi na faranti na T73, kayan da aka cire da kayan ƙirƙira.

Kayan aikin narke na 7A09 alloy daidai yake da na sauran kayan aikin aluminum da aka yi. The narkewa zafin jiki ne 710 ℃-750 ℃, da kuma simintin zafin jiki ne 710 ℃-735 ℃. Girman ingot ya fi karami kuma an zaɓi ƙananan zafin jiki. The narkewa zafin jiki na gami ne 477 ℃. —-638°C.

7A09 alloy shine muhimmin tsarin aluminum gami don damuwa. An yi amfani da shi sosai wajen kera mayaka, masu kai hare-hare masu matsakaicin zango, jiragen sufuri da masu horarwa. Ana amfani da shi don kera saukowar hanci kaya sassa, fikafikan gaba na gaba, katako, da docking fuselage. Frame goyon bayan makamai da ginshiƙai, partitions, hakarkarinsa, babban katako gidajen abinci, lebur wutsiya babba da ƙananan bango bangarori, na'ura mai aiki da karfin ruwa tsarin sassa, na'ura mai aiki da karfin ruwa tank piston sanduna, ciki da kuma waje cylinders da sauran key sassa.

Karya tauri (Kc, N/mm2,) na 7A09-T73 gami ya fi na kayan T6, kuma girman girmansa ya yi ƙasa da na kayan T6. Ƙarfin gajiyarsa kuma ya fi na kayan T6, kuma yanayin zafinsa shima ya fi na kayan T6. Ƙayyadadden ƙarfin zafi na 7A09-T6 alloy a 50 ° C shine 888J/(kg. ° C), kuma yanayin zafin dakin shine 18.5MS / m. Ban da aikin fasa lalatawar danniya, juriyar juriya ta gabaɗaya ta 7A09 alloy daidai take da na 2A12 gami. 7A09 alloy yana kula da lalata lalatawar danniya a cikin hanyar ST, kuma madaidaicin lalatawar damuwa a cikin LT da L kwatance ya fi 300N / mm2, don haka juriya na lalata damuwa a cikin waɗannan kwatance guda biyu ya isa ya dace da buƙatun amfani. Idan buƙatun ya fi girma, ana iya amfani da kayan T73. Ƙarfin jujjuyawar Rm na kayan a cikin wannan jihar yana kusan 10% ƙasa da na kayan T6, amma ƙimar ƙima ta lalata damuwa a cikin LT ɗin ya fi girma fiye da na 300N/mm2.

Don ɓangarorin da ke buƙatar duka ƙarfi da aikin lalata lalata, yakamata a yi amfani da kayan jihar T74. Matsakaicin lalatawar damuwa na 7A09-T74 alloy Die forgings shine 210N/mm2. Matakan hana lalata na 7A09 gami sun haɗa da anodic oxidation, sinadarai anti-lalata magani da fenti shafi.

Tsarin 7A09 gami ya ƙunshi α-Al m bayani da na biyu lokaci barbashi. Nau'i na biyu yana da nau'i uku: nau'in farko shine mahadi na tsaka-tsakin da aka kafa a lokacin ƙaddamarwar gami, kamar Al7FeCR, Al3Fe, da Mg2Si. Girman yana da girman gaske. Ana niƙa shi zuwa dunƙule kuma a rarraba shi cikin gungu. Girman shine 0.5μm-10μm. Ba shi da narkewa a cikin m bayani lokacin da zafi da kuma rage taurin kayan. Nau'i na biyu shi ne chromium-dauke da barbashi kamar Al2CrMg2, wanda aka ingots da suke homogenized kuma Yana precipitated daga m bayani a lokacin dumama tsari kafin aiki, kuma girmansa ne 0.05μm-0.5μm, wanda yana da gagarumin cikas ga recrystallization tsari da hatsi girma na kayan; Nau'i na uku shine lokacin ƙarfafa tsufa, wanda shine ingantaccen magani. Haɗa cikin ingantaccen bayani da tsufa daga ingantaccen bayani sune mahimman abubuwan da ke shafar kaddarorin kayan. The ƙarfafa barbashi na T6 jihar kayan ne yafi GP zone ≤4nm, babban ƙarfafa barbashi na T74 abu ne mika mulki lokaci η'na 5nm-6nm, da ƙarfafa lokaci na T73 abu ne mika mulki lokaci η'na 8nm-12nm da kuma 20nm-80nm Η lokaci barbashi.

Tsarin kayan 7A09-O daidai yake da na 2A12-O alloy, kuma yana da kyakkyawan tsari a 180 ° C-370 ° C; Tsarin sabon kayan da aka kashe kusan iri ɗaya ne da na alloy 2A12. An kashe farantin a dakin da zafin jiki don 4h Har yanzu akwai kyakkyawan tsari a ciki, da lokacin daskarewa don kiyaye tsari: 24h a 0 ℃, 3d a -7 ℃, 7d a -18 ℃.

The ƙirƙira zafin jiki na 7A09 alloy ne 320°C-440°C, da bude ƙirƙira zafin jiki ya zama ≤400°C. Yin tsayi da yawa zai haifar da ɓarna mai zafi, musamman lokacin ƙirƙira kyauta. 7A09 alloy ba sauki weld, ko da juriya waldi ba shi da kyau kamar 2A12 gami. Za'a iya kashe kayan ƙirƙira a cikin ruwan zafi ≤80 ℃. Alloy na 7A09 bayan quenching da ingantaccen magani yana da injina mai kyau.

Shiga wannan labarin ： Mafi Fiyayyen Tsarin Jirgin Sama Aluminum Alloy 7A09

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