Nkọwapụta ịka nká nke T73 maka efere, mpụ na ihe nrụnye

N'ime ihe ndị aluminom maka ụgbọ ala ikuku na China, 7A09 alloy bụ otu n'ime ihe ndị na-eme ka ike dị elu na-amasị maka akụkụ nhazi isi ike. Ngwaahịa emechara ọkara dị na-agụnye efere, ibe, ogwe, profaịlụ, tubes nwere mgbidi, na-arụ ọrụs. Ngwakọta kemịkalụ ya (oke%): 7Si, 04Fe, (0.5-0.5) Cu, 1.2 Mn, (2.0-0.15) Mg, (2.0-3.0) Cr, (0.16-0.30) Zn, 5.1Ti, adịghị ọcha ndị ọzọ bụ 6.1 n'otu n'otu, ngụkọta 0.10, ndị ọzọ bụ Al.

7A09 alloy nwere ezigbo nhazi ihe na steeti annealed na ngwọta ọgwụgwọ. Mgbe ịka nká na-emepụta ihe, ihe ndị na-emepụta na-adị ala, na mgbagwoju anya siri ike na-eju afọ na steeti T6; ọ bụ ezie na ike n'okpuru T73 overaging steeti dị ala karịa nke ahụ na steeti T6, Ọ nwere ezigbo nguzogide nrụgide corrosion cracking ma nwee nnukwu ike. Ihe T76 nwere nnukwu nguzogide spalling na corrosion. T74 nwere nnukwu ike na iguzogide nrụgide corrosion cracking n'otu oge.

Ike ike Rm nke 7A09 alloy dị elu karịa nke 2A12 na 2A14 aluminum alloys, na nrụgide corrosion cracking nguzogide dịkwa elu karịa nke ha. Ya mere, iji ya na-emepụta akụkụ ụgbọ elu ọ bụghị nanị na-enwe mmetụta mbelata dị arọ karị, kamakwa ọ nwere nchekwa dị elu. Ya mere, ike ọgwụgwụ ya amụbabeghị ya. Ya mere, ọ dị mkpa iji nlezianya tụlee okwu a mgbe emebe components na-tumadi doro ike ọgwụgwụ ibu. Mgbe okpomọkụ na-ebili, ike 7A09 alloy na-ebelata ngwa ngwa, ya mere okpomọkụ ọrụ ya ekwesịghị ịfe 125 ° C.

Ezughị ezu annealing nkọwapụta nke 7A09 alloy: 290℃——320℃, 2h——4h, ikuku jụrụ; nkọwa nkọwa zuru ezu: (390 ℃ - - 430 ℃) / (0.5h - - 1.5h), na ≤30 ℃ / h The jụrụ ọnụego bụ ihe na-erughị ma ọ bụ hà 200 ℃, na mgbe ahụ ikuku jụrụ si ọkụ.

The ngwọta ọgwụgwọ okpomọkụ nke a alloy bụ 460 ℃-475 ℃, ma ọgwụgwọ okpomọkụ nke aluminum-clad mpempe akwụkwọ kwesịrị ịbụ ala karịa ala ịgba, ọ bụghị ihe karịrị 2 ugboro, ka igbochi alloy ọcha penetrating na aluminum- oyi akwa ma belata nguzogide corrosion nke ihe. Igwe nju oyi bụ okpomọkụ ụlọ, mmiri ọkụ ma ọ bụ ihe ndị ọzọ kwesịrị ekwesị, nnyefe ekwesịghị ịbụ ihe karịrị 15s. The nhazi okpomọkụ nke T6 efere bụ (135 ℃ ± 5 ℃) / (8h-16h), na ndị ọzọ ihe, ọ bụ (140 ℃ ± 5 ℃) / 16h. Hụ tebụl maka nkọwa ịka nká nke efere T73, ihe ndị a kpụrụ akpụ na adụji.

Ngwá ọrụ mgbaze nke 7A09 alloy bụ otu ihe ahụ nke alloys aluminum ndị ọzọ arụrụ. The agbaze okpomọkụ bụ 710 ℃-750 ℃, na nkedo okpomọkụ bụ 710 ℃-735 ℃. Ogo ingot pere mpe ma ahọpụtara okpomọkụ nkedo dị ala. The agbaze okpomọkụ nke alloy bụ 477 ℃. —-638°C.

7A09 alloy bụ ihe dị mkpa bughi aluminum alloy maka nrụgide. A na-eji ya eme ihe n'ọtụtụ ebe n'ichepụta ndị agha, ndị na-atụ bọmbụ na-agba ọsọ, ụgbọ elu na-ebufe na ndị na-enye ọzụzụ. A na-eji ya arụpụta ọdịda imi gia akụkụ, nku n'ihu ibé, ibé, na fuselage docking. Frame na-akwado ogwe aka na ogidi, nkebi, ọgịrịga, nkwonkwo isi ọkụ, ogwe mgbidi dị elu na nke dị ala, akụkụ usoro hydraulic, mmanụ piston mmanụ hydraulic, n'ime na mpụta cylinders na akụkụ ndị ọzọ dị mkpa.

Mgbaji siri ike (Kc, N / mm2,) nke 7A09-T73 alloy dị elu karịa nke ihe T6, na mmụba ya na-eto eto dị ala karịa nke ihe T6. Ike ike ọgwụgwụ ya dịkwa mma karịa nke ihe T6, na njikwa okpomọkụ ya dịkwa elu karịa nke ihe T6. The kpọmkwem okpomọkụ ike nke 7A09-T6 alloy na 50°C bụ 888J/(kg.°C), na ime ụlọ okpomọkụ conductivity bụ 18.5MS/m. Ewezuga arụmọrụ nrụrụ corrosion nke nrụgide, nguzogide corrosion n'ozuzu nke 7A09 alloy bụ nke alloy 2A12. 7A09 alloy na-enwe mmetụta maka nrụgide corrosion na-agbawa na ntụziaka ST, na njedebe corrosion nrụgide na ntụziaka LT na L dị ukwuu karịa 300N / mm2, ya mere nrụgide corrosion na-agbawa n'akụkụ abụọ a zuru ezu iji mezuo ihe achọrọ iji mee ihe. Ọ bụrụ na ihe achọrọ dị elu, enwere ike iji ihe T73 mee ihe. Ike nkwụsịtụ Rm nke ihe dị na steeti a bụ ihe dịka 10% dị ala karịa nke ihe T6, mana uru nrụgide corrosion cracking threshold value na LT direction dị nnọọ ukwuu karịa nke 300N/mm2.

Maka akụkụ ndị chọrọ ma ike na nrụgide corrosion cracking, ekwesịrị iji ihe steeti T74 mee ihe. Ọnụ ụzọ mgbawa corrosion corrosion nke 7A09-T74 alloy die forgings bụ 210N/mm2. Usoro mgbochi corrosion nke 7A09 alloy gụnyere anodic oxidation, ọgwụ mgbochi corrosion ọgwụ na mkpuchi agba.

Ọdịdị nke 7A09 alloy mejupụtara α-Al ngwọta siri ike na akụkụ nke abụọ. Usoro nke abụọ nwere ụdị atọ: ụdị nke mbụ bụ ogige intermetallic nke e kpụrụ n'oge ihe siri ike alloy, dị ka Al7FeCR, Al3Fe, na Mg2Si. Ogo ha buru ibu. A na-egwepịa ya n'ọkpụkpụ ma kesaa ya na ụyọkọ. Ogo ya bụ 0.5μm-10μm. Ọ bụ ihe na-adịghị ike na ngwọta siri ike mgbe ọ na-ekpo ọkụ ma na-ebelata ihe siri ike nke ihe. Ụdị nke abụọ bụ ihe ndị nwere chromium dị ka Al2CrMg2, nke bụ ingots nke na-emekọ ọnụ na Ọ na-esi na ngwọta siri ike n'oge usoro kpo oku tupu nhazi ya, na nha ya bụ 0.05μm-0.5μm, nke nwere nnukwu ihe mgbochi na ihe mgbochi ahụ. recrystalization usoro na ọka ibu nke ihe onwunwe; Ụdị nke atọ bụ usoro ike ịka nká, nke bụ ọgwụgwọ ngwọta siri ike. Ịtinye n'ime ngwọta siri ike na ịka nká site na ngwọta siri ike bụ ihe ndị dị mkpa na-emetụta ihe onwunwe. The ike ahụ nke T6 ala ihe bụ tumadi na GP mpaghara ≤4nm, isi ike ahụ nke T74 ihe bụ mgbanwe frasi η'nke 5nm-6nm, na-agba ume agba nke T73 ihe bụ mgbanwe na-adọ η'nke 8nm-12nm na 20nm-80nm Η akụkụ akụkụ.

The formability nke 7A09-O ihe bụ nhata na nke 2A12-O alloy, na ọ nwere ezi formability na 180 ° C-370 ° C; Ọdịdị nke ihe ọhụrụ emenyụ emenyụ dị ka nke 2A12 alloy. A na-emenyụ efere ahụ n'ime ụlọ okpomọkụ maka 4h A ka nwere ọdịdị dị mma n'ime, yana oge oyi iji nọgide na-enwe nhazi: 24h na 0 ℃, 3d na -7 ℃, 7d na -18 ℃.

The forging okpomọkụ nke 7A09 alloy bụ 320C-440C, na oghere forging okpomọkụ kwesịrị ≤400C. Oke dị elu ga-eme ka mgbaka ọkụ na-ekpo ọkụ, ọkachasị n'oge ịgha n'efu. 7A09 alloy adịghị mfe ịgbado ọkụ, ọbụna iguzogide ịgbado ọkụ adịghị mma dị ka 2A12 alloy. Enwere ike imenyụ ihe mkpuchi na mmiri ọkụ ≤80 ℃. Alloy 7A09 mgbe emenyụchara yana ọgwụgwọ dị irè nwere ezigbo igwe.

Njikọ na akụkọ a ： Ọdịdị ahọrọ nke ụgbọ elu Aluminom Alloy 7A09

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