7A04 alloy shine jerin Al-Zn-Mg-Cu mai zafi mai iya jurewa jirgin sama mai ƙarfi mai ƙarfi aluminum gami, wanda za'a iya magance zafi da ƙarfafawa. An jera abubuwan da ke tattare da shi a cikin GB/T3190-2008, kuma ya dace da gwanon B95 na Tarayyar Soviet da Rasha da AlZnMgCu1 na Jamus. .5.3.4365 alloy daidai yake, domin a shekara ta 1944 masana'anta ta 95 na Tarayyar Soviet ta yi nasarar yin gwajin wannan alluran da ba a kammala ba, don haka ake kira B95 gami. A shekara ta 1957, China Northeast Light Alloy Co., Ltd. (sa'an nan Harbin Aluminum Processing Plant) ya samar da wannan gami da taimakon kwararrun Tarayyar Soviet. Alloy faranti da extruded kayan.

Babban fasalin 7A04 alloy shine cewa ƙarfin yawan amfanin sa Rpo.2 yana kusa da ƙarfin ƙarfin ƙarfi Rm, filastik ɗin sa yana da ƙasa, kuma yana da damuwa ga ƙaddamar da damuwa, musamman ma lokacin da aka jujjuya nauyin rawar jiki da maimaitawa a tsaye. Don ƙira, masana'anta da haɗuwa da sassa, ƙaddamar da damuwa da ƙarin abubuwan damuwa ya kamata a kauce masa kamar yadda zai yiwu. 7A04 alloy ba zafi resistant kuma zai yi laushi sosai idan zafin aiki ya fi 125 ℃. Matsakaicin lalata juriya mai kauri na 7A04 alloy workpieces a cikin gajeriyar hanya madaidaiciya (ST) yayi ƙasa.

Abubuwan sinadaran na 7A04 alloy (mass%): 0.50Si, 0.50Fe, (1.4-2.0) Cu, (0.20-0.6) Mn, (1.8-2.8) Mg, (0.1-0.25) Cr, (5.0 --7.0) Zn, 0.10Ti, sauran ƙazanta suna daidaiku 0.05, jimlar 0.10, sauran kuma Al. Ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun 7A04 alloy Semi-remitted da matsakaicin samfurin faranti, tube, bayanan martaba, sanduna da bututu (290-320) ℃ / (2-4) h, sanyaya iska; ƙayyadaddun bayanai don cikakken annealing (390-430) ℃ / (0.5-1.5) h, sanyaya tanderu zuwa ≤ 200 ℃ a rage yawan zafin jiki na ≤ 30 ℃ / h, sanyaya iska daga cikin tanderun, ko annealing a (320-380). ℃ na (1-2) h. Domin inganta ingantacciyar tanderun ƙarfe, masana'antar ta kan kwashe a 400 ° C-420 ° C na tsawon awanni 2, ta kwantar da shi zuwa <150 ° C a yanayin sanyaya na 30 ° C / h, sannan a sanyaya iska. tanderun.

The bayani magani zafin jiki na wannan gami ne 465 ℃-475 ℃, quenched a cikin ruwa a dakin da zazzabi, da kuma canja wurin lokaci ne ya fi guntu fiye da 25s. Tsirrai masu sarrafa aluminium galibi suna ɗaukar jiyya mai niyya sosai da ƙayyadaddun jiyya na tsufa bisa ga samfura daban-daban da samfuran ƙayyadaddun bayanai daban-daban.

Kayan aikin smelting da simintin gyare-gyare da man fetur na 7A04 alloy sun kasance daidai da na sauran kayan aikin aluminum. Duk da haka, saboda yawan zafin jiki na narkewa da kuma babban bambance-bambance a cikin yawa na manyan abubuwan da aka haɗa, rarrabuwa yana yiwuwa ya faru a lokacin narkewa, kuma ingot yana da sauƙi ga tsagewa, sako-sako, da mafita. Yana da sauƙi don samun iska, kuma za a samar da ƙarin abubuwan da aka haɗa a cikin ingot. Don rage waɗannan lahani, ban da tsananin sarrafa abubuwan haɗin gwal, dole ne a ba da hankali ga sarrafa tsarin narkewa da simintin gyare-gyare.

Zazzabi na zagaye na ingot na simintin gyare-gyare shine 720 ℃ - 745 ℃, iska ingot zafin jiki shine 725 ℃ - 740 ℃; slab simintin zafin jiki ne 685 ℃ — 745 ℃; Ya kamata a shimfiɗa ingots masu girma da yawa, guraben ingots da slabs kafin yin simintin .

7A04 gami da aka fi amfani da shi don kera ɓangarorin tsarin jirgin sama: katako, kirtani, manyan kantuna, fatun, haƙarƙari, haɗin gwiwa, saukowa. kaya sassa, da dai sauransu The Semi-ƙare kayayyakin da za a iya kawota su ne: faranti, tube, profiles, tube, sanduna, bututu, bango panels, free ƙirƙira kuma mutu ƙirƙiras, da dai sauransu.

Alloy yana da babban darajar hankali da ƙarancin ƙarfin gajiyar axial. Aikace-aikacen dole ne ya zaɓi tsarin ƙirar ƙira sosai, zaɓi siffar tare da mafi ƙanƙantar damuwa, da sauye-sauye na ɓangaren ɓangaren da duk sassan jujjuyawar ya kamata su kasance masu santsi don guje wa canje-canje kwatsam da raguwar eccentricity, duk fillet radii ya kamata. ku ≥2mm. Kauce wa karce, abrasions da hakora masu tsanani lokacin sarrafa sassa.

Don manyan samfuran da aka gama da su, musamman manyan ƙirƙira ƙirƙira da bayanan martaba, yakamata a bincika aikin jujjuyawar, kuma yakamata a gudanar da gwaje-gwaje daban-daban waɗanda ba su lalata ba don tabbatar da cewa lahanin suna cikin kewayon da aka yarda. Juriya na lalata 7A04 gami a cikin jihar T4 bai cancanta ba, don haka ana buƙatar tsufa na wucin gadi. Juriya na lalata na takardan allo na aluminum-clad 7A04 mai ɗanɗano ta wucin gadi daidai yake da na takardar alloy mai aluminium 2A12. Juriya na lalata samfuran da aka fitar da ƙananan sassa na giciye daidai yake da na duralumin aluminum mara kyau. Maganin tsufa mai daraja na 7A04 gami yana da ingantaccen juriyar lalatawar damuwa. Anodizing da surface zanen magani iya yadda ya kamata kare extruded abu. Lalata

7A04-T6 alloy sheet yana da tabbatacce na roba modulus na 66GN/mm2 a 20°C, wani extruded abu na 71GN/mm2, da kuma wani jirgin iri karaya tauri Kc na 50.64MN/(m3/2). Tsarin Semi-ci gaba da simintin 7A04 alloy ingot ya haɗa da α-Al m bayani, lokaci T (AlCuMgZn) da S (Al2CuMg), da ƙaramin adadin Mg2Si, AlFeMnSi da Al6 (FeMn). Tsarin bayan maganin maganin shine α S Bayan tsufa a 100 ℃-140 ℃, tsarin ya zama α S MgZn2 T lokaci.

7A04 alloy na iya lalacewa ta sanyi ko zafi. Matsakaicin nakasawa mai zafi na ingot bai kai ko daidai da 60% ba, kuma matsakaicin adadin nakasar kayan nakasa zai iya kaiwa 80%. Za a iya kera na'urorin da ke da sifofi masu rikitarwa, kuma zafin ƙirƙira shine 380 ° C-430 ° C. Lokacin yin thermal gyara a sassa ko Semi-ƙare kayayyakin, da mold zafin jiki ne 130 ℃ ± 15 ℃, da kuma yawan zafin jiki na part kanta ne 130 ℃ ± 10 ℃ ko 150 ℃ ± 10 ℃. Lokacin riƙewa a 130 ℃ ± 10 ℃ shine 10h-12h. Lokacin riƙewa don dumama a 150 ℃ ± 10 ℃ shine 7h.

Yanayin wadata na bangon bangon da aka cire shi ne T6, ana iya gyara shi a cikin wannan jihar, kuma dole ne a yi zafi a cikin sabon yanayin da aka kashe. Matsakaicin tsufa-mataki ɗaya shine 140 ℃ / 16h; biyu-mataki tsufa a 120 ℃ / 3h 160 ℃ / 3h iya samun mai kyau m yi. 7A04 alloy yana da kyakkyawan aikin walda da machinability.

Shiga wannan labarin ： Farashin 7A04 - Ƙarfin Ƙarfin Kusa da Ƙarfin Ƙarfin Ƙarfin Ƙarfi

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