Iyo Yakasarudzika Mamiriro Endege Aluminium Alloy 7A09 | PTJ Blog

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Iyo Inofarirwa Mamiriro Endege Aluminium Alloy 7A09

2021-10-16

T73 Artificial Kuchembera Tsanangudzo yePlates, Extrusions uye Forgings

Pakati pezvigadzirwa zvearuminiyamu zvemotokari dzemuchadenga muChina, 7A09 alloy ndiyo imwe yearoyi akasarudzika epamusoro-simba alloys kune makuru akasimbiswa zvimiro zvikamu. Zvigadzirwa zvehafu-zvakapera zviripo zvinosanganisira mahwendefa, mitsetse, mabara, maprofile, makobvu-akavezwa machubhu, forgings, etc. Mushonga wemakemikari unonzwisisika kupfuura we7A04 alloy, saka ine yepamusoro-soro yekushanda uye inova imwe yezvinhu zvakakosha zvemugadziri. Mushonga waro wemakemikari (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, mamwe matsvina ari ega 0.05, anokwana 0.10, uye mamwe ari Al.

7A09 alloy ine yakanaka yekugadzira zvivakwa mune annealed uye mhinduro kurapwa nyika. Mushure mekuchembera kwekugadzira, maitiro ekugadzira ari pasi, uye kuomarara kwekuputsika kunogutsa muT6 state; kunyangwe simba riri pasi peiyo T73 yekuwedzeredza mamiriro yakadzikira pane iyo iri muT6 state, Iyo ine yakanaka kupikisa kushushikana nekupwanya kwecorrosion uye ine yakanyanya kuoma. T76 zvinhu zvine yakakwirira kuramba spalling uye ngura. T74 ine simba rakakura uye kuramba kushushikana ngura kutsemuka panguva imwe chete.

Iyo tensile simba Rm ye7A09 alloy yakakwirira kupfuura iyo ye2A12 uye 2A14 aruminiyamu alloys, uye kushushikana kwayo kwekuora kwekupwanya kuramba kwakakwirawo kupfuura yavo. Naizvozvo, kushandiswa kwayo kugadzira zvikamu zvendege kwete kungoita hukuru hwekudzikisa huremu, asiwo kune kuchengetedzwa kwepamusoro. Nokudaro, simba rayo rekuneta harina kuwedzerwa maererano. Naizvozvo, zvinodikanwa kunyatso funga nezvenyaya iyi paunenge uchigadzira zvikamu izvo zvinonyanya kuisirwa kuneta. Kana kutonhora kuchikwira, simba re 7A09 alloy rinoderera nekukurumidza, saka tembiricha yayo yekushanda haifanire kudarika 125 ° C.

Kusakwana kweannealing ye7A09 alloy: 290℃——320℃, 2h——4h, kutonhora kwemhepo; kukwana kwe annealing specification: (390℃——430℃)/(0.5h——1.5h), ne ≤30℃/h Mwero wekutonhora uri pasi kana kuenzana ne200 ℃, wozotonhodzwa nemhepo kubva muchoto.

Iyo tembiricha yekugadzirisa tembiricha yeiyi alloy ndeye 460 ℃-475 ℃, asi tembiricha yekurapwa yealuminium-yakapfeka pepa inofanira kunge yakaderera pane yakaderera muganho, kwete kanopfuura ka2, kuitira kudzivirira iyo alloy element kuti isapinda mualuminium- clad layer uye kuderedza corrosion resistance yezvinyorwa. Iyo yekutonhodza svikiro ndiyo Tembiricha yeMukamuri, mvura inodziya kana imwe svikiro yakakodzera, kutamisa hakufanirwe kudarika 15s. Iyo tembiricha yekugadzirisa yeT6 ndiro ndeye (135℃±5℃)/(8h—16h), uye kune zvimwe zvinhu, iri (140℃±5℃)/16h. Ona tafura yezvakatemerwa zvekuchembera zveT73 mahwendefa, extruded zvinhu uye forgings.

Iyo Inofarirwa Mamiriro Endege Aluminium Alloy 7A09

Midziyo yekunyungudutsa ye7A09 alloy yakafanana neyemamwe akagadzirwa aruminiyamu alloys. Tembiricha yekunyunguduka ndeye 710 ℃-750 ℃, uye tembiricha yekukanda i710 ℃-735 ℃. Saizi yeingot idiki uye tembiricha yekukanda yakaderera inosarudzwa. Iyo tembiricha yekunyungudika yealloy ndeye 477 ℃. ——638°C.

7A09 alloy yakakosha kuumbwa kwealuminium alloy yekushushikana. Yakashandiswa zvakanyanya mukugadzira varwi, mabhomba epakati-kati, ndege dzekutakura uye varairidzi. Inoshandiswa kugadzira mhino kumhara giya zvikamu, mapapiro epamberi matanda, matanda, uye fuselage docking. Frame inotsigira maoko nembiru, partitions, mbabvu, main danda majoini, flat muswe kumusoro uye yakadzika madziro mapaneru, hydraulic system zvikamu, hydraulic mafuta tank piston rods, mukati nekunze masilinda uye zvimwe zvakakosha zvikamu.

Kutyoka kwekuomarara (Kc, N/mm2,) ye7A09-T73 alloy yakakwirira kudarika yeT6 material, uye mwero wayo wekukura wakaderera pane weT6. Simba rayo rekuneta zvakare riri nani pane iro reT6 zvinhu, uye kupisa kwayo kunowedzera zvakare kupfuura iyo yeT6 zvinhu. Iyo chaiyo yekupisa inokwana 7A09-T6 alloy pa50 ° C ndeye 888J / (kg. ° C), uye tembiricha yekamuri conductivity ndeye 18.5MS/m. Kunze kwekunetsekana kwekuora kwekupwanya kuita, iyo general corrosion resistance ye7A09 alloy yakaenzana neiyo 2A12 alloy. 7A09 alloy inonzwa kune stress corrosion cracking mu ST direction, uye stress corrosion pachikumbaridzo muLT ne L directions yakakura kudarika 300N/mm2, saka stress corrosion cracking resistance mumativi maviri aya inokwana kuzadzisa zvinodiwa zvekushandisa. Kana izvo zvinodiwa zvakakwirira, T73 zvinhu zvinogona kushandiswa. The tensile simba Rm yezvinhu zviri mudunhu iri rinenge 10% yakaderera pane iyo yeT6 zvinhu, asi kushushikana kwecorrosion kupaza chikumbaridzo kukosha muLT direction yakakura kupfuura iyo ye300N/mm2.

Kune zvikamu zvinoda zvese simba uye kushushikana corrosion kupaza kuita, T74 state zvinhu zvinofanirwa kushandiswa. Iyo stress corrosion cracking pachikumbaridzo che 7A09-T74 alloy die forgings ndeye 210N/mm2. Iyo anti-corrosion matanho e7A09 alloy anosanganisira anodic oxidation, makemikari anti-corrosion kurapwa uye pendi coating.

Chimiro che7A09 alloy chine α-Al yakasimba mhinduro uye yechipiri chikamu zvidimbu. Chikamu chechipiri chine mhando nhatu: yekutanga mhando ndeye intermetallic makomisheni akaumbwa panguva yekusimbisa alloy, seAl7FeCR, Al3Fe, uye Mg2Si. Saizi yakakura. Inopwanyika kuita mapundu uye inogoverwa mumasumbu. Saizi ndeye 0.5μm-10μm. Iyo haina kunyungudika mune yakasimba mhinduro kana ichipisa uye inoderedza kuoma kwezvinhu. Yechipiri mhando ndeye chromium-ine zvimedu zvakaita seAl2CrMg2, ari ingots ari homogenized uye Inonaya kubva kune yakasimba mhinduro panguva yekudziya isati yagadziriswa, uye saizi yayo i0.05μm-0.5μm, ine chipingamupinyi chikuru kune iyo recrystallization process uye kukura kwezviyo zvezvinhu; mhando yechitatu ndiyo kuchembera kusimbisa nhanho, inova yakasimba mhinduro kurapwa. Kubatanidza mune yakasimba mhinduro uye kuchembera kubva kune yakasimba mhinduro zvinhu zvakakosha zvinokanganisa zvinhu zvenyama. Izvo zvimedu zvekusimbisa zveT6 zvinhu zvehurumende zvinonyanya GP zone ≤4nm, iyo huru yekusimbisa zvimedu zveT74 zvinhu chikamu cheshanduko η'of 5nm-6nm, chikamu chekusimbisa cheT73 chinhu chikamu cheshanduko η'of 8nm-12nm uye 20nm-80nm Η chikamu zvidimbu.

Kuumbwa kwe7A09-O zvinhu zvakaenzana neiyo 2A12-O alloy, uye ine maitiro akanaka pa180 ° C-370 ° C; kuumbwa kwezvinhu zvitsva zvakadzimwa zvakada kufanana neiyo 2A12 alloy. Iyo ndiro inodzimwa pakupisa kwekamuri ye4h Pachine chimiro chakanaka mukati, uye nguva yechando kuchengetedza chimiro: 24h pa 0 ℃, 3d pa -7 ℃, 7d pa -18 ℃.

Iyo tembiricha yekugadzira ye7A09 alloy i320°C-440°C, uye tembiricha yekuvhura yekuvhura inofanirwa kunge iri ≤400°C. Kunyanya kukwira kunokonzeresa kupisa brittleness, kunyanya panguva yemahara forging. 7A09 alloy haisi nyore kupinza, kunyangwe kuramba welding haina kunaka se2A12 alloy. Forgings inogona kudzimwa mumvura inopisa ≤80 ℃. Iyo 7A09 alloy mushure mekudzima uye kurapwa kunoshanda kune yakanaka machinability.

Batanidza kuchinyorwa ichi: Iyo Inofarirwa Mamiriro Endege Aluminium Alloy 7A09

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