ʻO 7A04 alloy he Al-Zn-Mg-Cu series heat-treatable aerospace super-hard aluminum alloy, hiki ke hoʻohana ʻia a hoʻoikaika ʻia. Ua helu ʻia kona haku mele ma GB/T3190-2008, a ua kūpono ia me ka hui B95 o ka Soviet Union a me Rusia a me ka AlZnMgCu1 o Kelemānia. Ua like ka .5.3.4365 alloy, no ka mea, i ka makahiki 1944 ua ho'āʻo maikaʻi ka hale hana 95 o ka Soviet Union i kēia huahana semi-finished alloy, no laila ka inoa ʻo B95 alloy. Ma 1957, China Northeast Light Alloy Co., Ltd. (a laila Harbin Aluminum Processing Plant) i hana i kēia huila me ke kōkua o nā poʻe loea Soviet. Nā papa huila a me nā mea i hoʻokuʻu ʻia.

ʻO ka hiʻohiʻona nui o ka huila 7A04 ʻo ia ka ikaika o ka hāʻawi ʻana iā Rpo.2 kokoke i ka ikaika tensile Rm, ua haʻahaʻa kona plasticity, a ua maʻalahi ia i ke koʻikoʻi koʻikoʻi, ʻoi aku hoʻi i ka wā i hoʻokau ʻia i nā haʻalulu haʻalulu a me nā ukana static. No ka hoʻolālā ʻana, ka hana ʻana a me ka hui ʻana o nā ʻāpana, pono e pale ʻia ke koʻikoʻi koʻikoʻi a me nā kumu koʻikoʻi hou e like me ka hiki. ʻAʻole pale wela ka 7A04 alloy a e palupalu loa inā ʻoi aku ka mahana o ka hana ma mua o 125 ℃. He haʻahaʻa ke koʻikoʻi o ka ʻāʻī ʻana o nā mea hana hao 7A04 ma ke ala pōkole pōkole (ST).

ʻO ka hui kemika o 7A04 alloy (nuipa%): 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, he 0.05 pakahi na haumia e ae, he 0.10 ka huina, a o ke koena Al. Nā kikoʻī no ka hoʻopili piha ʻole ʻana o 7A04 alloy semi-finished and intermediate product plates, strips, profiles, bars and pipes (290—320) ℃/(2—4)h, ea hoʻoluʻu; kikoʻī no ka annealing piha (390—430) ℃ / (0.5-1.5) h, ka hoʻoluʻu ʻana o ka umu i ≤ 200 ℃ ma kahi pae hoʻohaʻahaʻa wela o ≤ 30 ℃/h, ka hoʻoheheʻe ʻana o ka ea i waho o ka umu, a i ʻole ka annealing ma (320-380). ) ℃ no (1-2) hola. I mea e hoʻomaikaʻi ai i ka pono o ka umu metala, hoʻohui pinepine ka hale hana ma 400 ° C-420 ° C no 2 mau hola, hoʻoluʻu iā ia i lalo o 150 ° C ma kahi mahana hoʻomaha o 30 ° C / h, a laila hoʻomaha ka ea. ka umu ahi.

ʻO ka mahana hoʻonā hoʻonā o kēia alloy he 465 ℃—475 ℃, kinai ʻia i ka wai ma ka lumi wela, a ʻoi aku ka pōkole o ka manawa hoʻololi ma mua o 25s. Hoʻohana pinepine nā mea kanu hana alumini i ka mālama ʻana i ka hopena i manaʻo nui ʻia a me nā kikoʻī lapaʻau kahiko e like me nā huahana like ʻole a me nā huahana o nā kikoʻī like ʻole.

ʻO nā mea hoʻoheheʻe a me ka hoʻolei ʻana a me ka wahie o 7A04 alloy ua like ia me nā mea alumini ʻē aʻe. Eia nō naʻe, ma muli o ka nui o ka hoʻoheheʻe ʻana o ka mahana a me nā ʻokoʻa nui o ka nui o nā mea hoʻohuihui nui, hiki ke hoʻokaʻawale ʻia i ka wā o ka hoʻoheheʻe ʻana, a hiki i ka ingot ke maʻa i nā māwae, looseness, a me ka hopena. He mea maʻalahi ka loaʻa ʻana o ka ea, a ʻoi aku ka nui o nā inclusions oxidized e hana ʻia i loko o ka ingot. I mea e hōʻemi ai i kēia mau hemahema, ma waho aʻe o ka hoʻomalu pono ʻana i ka haku mele ʻana, pono e uku ʻia i ka mana o ka hoʻoheheʻe ʻana a me ka hoʻolei ʻana.

He 720 ℃—745 ℃ ka wela o ka hoʻoheheʻe ʻana o ka ea, he 725 ℃—740 ℃; ʻO ka mahana hoʻolei papa he 685 ℃—745 ℃; ʻO nā ingots nui aʻe, nā ingots hollow a me nā papa e waiho ʻia ma mua o ka hoʻolei ʻana , Pono e hoʻonā ʻia ka ʻāpana ʻīpuka ma hope o ka hoʻolei ʻana.

Hoʻohana nui ʻia ka alloy 7A04 i ka hana ʻana i nā ʻāpana i hoʻopaʻa ʻia i nā mokulele: nā kaola, nā stringers, nā bulkheads, nā ʻili, nā iwi ʻaoʻao, nā hono, ka pae ʻana. kapa nā'āpana, a me nā mea'ē aʻe. ʻO nā huahana semi-finished i hiki ke hoʻolakoʻia: nā papa, nā paʻi, nā profiles, nā paʻi, nā pahu, nā paipu, nā pā pā, manuahi forging a make forgings, etc.

He kiʻekiʻe ka notch sensitivity a me ka ikaika haʻahaʻa axial tensile fatigue. Pono e koho pono ka palapala noi i ke ʻano o ka hoʻolālā hoʻolālā, koho i ke ʻano me ka haʻahaʻa haʻahaʻa haʻahaʻa haʻahaʻa, a ʻo ka hoʻololi ʻana o ka ʻāpana ʻāpana a me nā ʻāpana hoʻololi a pau e maʻalahi e pale aku No nā hoʻololi koke a me ka hōʻemi ʻana o ka eccentricity, pono nā radii fillet āpau. e ≥2mm. E pale i nā ʻōpala, nā abrasions a me nā niho koʻikoʻi i ka wā e hana ai i nā ʻāpana.

No nā huahana semi-hoʻopau nui, ʻoi aku ka nui o nā forgings paʻakikī a me nā profiles, pono e nānā pono ʻia ka hana transverse, a pono e hoʻokō ʻia nā ʻano hoʻāʻo pono ʻole e pono ai e hōʻoia i nā hemahema i loko o ka pae i ʻae ʻia. ʻAʻole kūpono ka pale ʻana o ka corrosion o 7A04 alloy i ka mokuʻāina T4, no laila pono ke ʻelemakule. ʻO ke kūpaʻa ʻino ʻana o ka pāpaʻi alumini 7A04 i hoʻopaʻa ʻia i hana ʻia e like me kēlā me ka ʻāpana alumini 2A12. ʻO ka pale ʻana o ka corrosion o nā huahana extruded a me nā ʻāpana ʻāpana liʻiliʻi e like me ka duralumin alumini unclad. ʻO ka hoʻomaʻamaʻa ʻana i ka wā kahiko o 7A04 alloy he kūpaʻa kūpaʻa koʻikoʻi koʻikoʻi. Hiki i ke anodizing a me ka hana pena pena ke pale pono i ka mea extruded. ʻAhuehue.

7A04-T6 laula hao he modulus elastic maikaʻi o 66GN/mm2 ma 20°C, he mea extruded o 71GN/mm2, a me ka mokulele strain fracture toughness Kc o 50.64MN/(m3/2). ʻO ke ʻano o ka semi-continuous casting 7A04 alloy ingot e loaʻa i ka α-Al solid solution, T (AlCuMgZn) phase a me S (Al2CuMg), a me kahi liʻiliʻi o Mg2Si, AlFeMnSi a me Al6 (FeMn). ʻO ka hale ma hope o ka hoʻoponopono ʻana ʻo α S Ma hope o ka ʻelemakule ma 100 ℃-140 ℃, lilo ka hale i ka α S MgZn2 T phase.

7A04 hiki ke hoʻololi ʻia e ke anu a me ka wela. ʻO ka liʻiliʻi o ka deformation wela wela o ka ingot ma lalo o 60%, a hiki i ka 80% ka nui o ka deformation rate o ka mea deformed. Hiki ke hana ʻia nā forgings me nā ʻano paʻakikī, a ʻo ka mahana forging he 380°C-430°C. Ke hana nei i ka hoʻoponopono wela ma nā ʻāpana a i ʻole nā ​​huahana semi-finished, ʻo ka mahana o ka mold he 130 ℃ ± 15 ℃, a ʻo ka mahana o ka ʻāpana ponoʻī he 130 ℃ ± 10 ℃ a i ʻole 150 ℃ ± 10 ℃. ʻO ka manawa paʻa ma 130 ℃ ± 10 ℃ he 10h—12h. ʻO ka manawa paʻa no ka hoʻomehana ʻana ma 150 ℃ ± 10 ℃ ʻo 7h.

ʻO ke kūlana hoʻolako o ka pā pā extruded ʻo T6, hiki ke hoʻoponopono ʻia i kēia mokuʻāina, a pono e hoʻomehana ʻia i ka mokuʻāina hou. ʻO ka hoʻohālikelike o ka wā kahiko hoʻokahi he 140 ℃ / 16h; hiki ke loaʻa i ka hana hoʻokō maikaʻi ʻelua-pae ma 120 ℃ / 3h 160 ℃ / 3h. 7A04 alloy he maikai wahi wiliwili hana a me ka machinability.

loulou i kēia ʻatikala: 7A04 Aloe - Hoʻoulu i ka ikaika kokoke i ka ikaika tensile

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