7 series aluminium alloy yi-Al-Zn-Mg-Cu, Ingxubevange isetshenziswe embonini yokukhiqiza izindiza kusukela ngasekupheleni kwawo-1940. I7075 aluminium ingxubevangeinesakhiwo esiqinile kanye nokumelana nokugqwala okuqinile, okungcono kakhulu kwezindiza kanye namapuleti aseMarine.Ukumelana nokugqwala okujwayelekile, izakhiwo ezinhle zemishini kanye nokusabela kwe-anode.

Izinhlamvu ezinhle zenza ukusebenza kangcono kokumba okujulile nokumelana nokuguga okuthuthukisiwe. Amandla angcono kakhulu e-aluminium alloy yingxubevange engu-7075, kodwa ayikwazi ukushiselwa, futhi ukumelana nokugqwala kwayo kubi kakhulu, izingxenye eziningi zokukhiqiza ze-CNC zisebenzisa ingxubevange engu-7075. I-Zinc iyingxenye eyinhloko yengxubevange kulolu chungechunge, kanye nengxubevange encane ye-magnesium ingenza izinto zelashwe ngokushisa, zifinyelele izici zamandla eziphakeme kakhulu.

Lolu chungechunge lwezinto zokwakha luvame ukungezwa enanini elincane lethusi, i-chromium namanye ama-alloys, futhi phakathi kwawo inombolo engu-7075 aluminium alloy ikakhulukazi izinga eliphezulu, amandla aphezulu, afanele uhlaka lwendiza kanye nezinsiza zamandla aphezulu.Izici zayo ziyi, ipulasitiki enhle ngemuva kokwelashwa kwesixazululo esiqinile, umphumela wokuqinisa ukwelashwa muhle kakhulu, unamandla aphezulu angaphansi kuka-150 ℃, futhi unamandla okushisa aphansi kakhulu; ukuthambekela kokuqhekeka kwe-corrosion; i-aluminiyamu eboshwe noma enye imithi yokuzivikela. Ukuguga kabili kungathuthukisa ukumelana ne-alloy stress corrosion cracking. I-plasticity esimweni esifakiwe futhi esisanda kucinywa iphansi kancane kunesimo esifanayo se-2A12. ngcono kancane kune-7A04, ukukhathala okumile kwepuleti. I-Gtch iyazwela, ukugqwala kwengcindezi kungcono kuno-7A04. ukuminyana ngu-2.85 g/cm3.

I-7075 aluminium alloy inezakhiwo ezinhle kakhulu zemishini, ukusebenza okuqondile kulezi zici ezilandelayo:

1. Amandla aphezulu: Amandla aqinile we-7075 aluminium alloy angafinyelela ngaphezu kwe-560MPa, okuyingxenye yamandla aphezulu we-aluminium alloy, okuyizikhathi ezingu-2-3 kwamanye ama-alloys e-aluminium ngaphansi kwezimo ezifanayo.

2. Ukuqina okuhle: Izinga lokushwabana kwesigaba kanye nezinga lokwelulwa kwe-7075 ingxubevange ye-aluminium liphezulu uma kuqhathaniswa, futhi imodi yokuphuka iwukuqina kokuqina, okulungele kangcono ukucubungula nokwenza.

3. Ukusebenza kahle kokukhathala: I-7075 Aluminium alloy isengakwazi ukulondoloza izakhiwo zayo ezinhle zemishini ngaphansi kokucindezeleka okukhulu nomthwalo ophindaphindayo ophindaphindayo, ngaphandle kwe-oxidation, i-crack nezinye izenzakalo.

4. iphumelela kakhulu ekugcineni ukushisa:7075 Aluminium ingxubevangeisengakwazi ukugcina izakhiwo zayo ezinhle zemishini endaweni yokushisa ephezulu, okuwuhlobo lwe-aluminium alloy ukumelana nokushisa okuphezulu.

5. Ukumelana nokugqwala okuhle: I-7075 Aluminium alloy inokumelana nokugqwala okuhle futhi ingasetshenziswa ekwenzeni izingxenye ezinezidingo eziphakeme zokumelana nokugqwala.

Isimo:

1.O-state: (isimo esifakiwe)

Indlela yokuqalisa: Shisisa ingxubevange engu-7075 aluminium izinga lokushisa elifanele, imvamisa ku-350-400 degrees Celsius, gcina isikhathi esithile bese upholisa kancane izinga lokushisa elilingana negumbi, inhloso: ukuqeda ukucindezeleka kwangaphakathi nokwenza ngcono ipulasitiki nokuqina impahla.Amandla amakhulu okudonsa angu-7075 (7075-0 tempering) angeke adlule ku-280 MPa (40,000 psi) kanye namandla amakhulu okukhiqiza angu-140 MPa (21,000 psi). Ukwelulwa kwezinto (ukwelula ngaphambi kokwehluleka kokugcina) kungu-9-10%.

2.T6 (ukwelashwa kokuguga):

Indlela yokusebenzisa: isixazululo sokuqala esiqinile sokwelapha ukushisa kwengxubevange kuya ku-475-490 degrees Celsius kanye nokupholisa ngokushesha bese ukwelashwa kokuguga, ngokuvamile ku-120-150 degrees Celsius ukwahlukanisa amahora amaningana, inhloso: ukuthuthukisa amandla nobulukhuni bezinto ezibonakalayo. .Amandla okugcina aqinile we-T6 tempering 7075 yi-510,540 MPa (74,00078,000 psi) namandla okukhiqiza okungenani angu-430,480 MPa (63,00069,000 psi). Inezinga lokunweba lokuhluleka elingu-5-11%.

3.T651 (ukwelula + ukuguga ukuqina):

Indlela yokusebenzisa: ngesisekelo sokuqina kokuguga kwe-T6, ingxenye ethile yokwelula ukuze kuqedwe ukucindezeleka okusalayo, inhloso: ukugcina amandla aphezulu nobulukhuni ngenkathi kuthuthukiswa ipulasitiki nokuqina.Amandla okugcina we-tensile we-T651 tempering 7075 angama-570 MPa (83,000) psi) namandla okukhiqiza angama-500 MPa (73,000 psi). Inezinga lokwelula lokuhluleka lika-3 - 9%. Lezi zimfanelo zingashintshwa kuye ngohlobo lwento esetshenzisiwe. Amapuleti aminyene angase abonise amandla aphansi nobude kunezinombolo ezibalwe ngenhla.

Ukusetshenziswa okuyinhloko kwe-7075 aluminium alloy:

I-1.Inkundla ye-Aerospace: I-7075 aluminium alloy isetshenziswa kabanzi emkhakheni we-aerospace ngenxa yamandla ayo aphezulu nezici ezingasindi. Kuvame ukusetshenziselwa ukwakhiwa kwezakhiwo zezindiza, amaphiko, ama-bulkheads nezinye izingxenye ezibalulekile, kanye nezinye izakhiwo ezidinga amandla aphezulu kanye nokumelana nokugqwala.

2. Imboni yezimoto: I-7075 aluminium alloy nayo idlala indima ebalulekile ekwakhiweni kwezimoto. Ivame ukusetshenziswa ohlelweni lokubhuleka kanye nezingxenye ze-chassis zezimoto ezisebenza kahle nezimoto zomjaho, ukuze kuthuthukiswe ukusebenza kwezimoto nokunciphisa isisindo.

3. Imishini yokuvivinya umzimba: Ngenxa yamandla ayo aphezulu kanye nezici ezingasindi, ingxubevange ye-aluminium engu-7075 ivame ukusetshenziselwa ukwenza izinto zezemidlalo, njengezinduku zokuhamba, amakilabhu egalofu, njll.

4. Ukwakhiwa komshini: Emkhakheni wokukhiqiza imishini, i-7075 aluminium alloy nayo isetshenziswa kabanzi ekwenzeni izingxenye eziqondile, isikhunta nokunye. Ngaphezu kwalokho, i-7075 aluminium alloy nayo isetshenziswa kabanzi ekuvutheleni isikhunta sepulasitiki (ibhodlela), isikhunta seplastiki se-ultrasonic, isikhunta sezicathulo, isikhunta sepulasitiki sephepha, isikhunta esakha igwebu, isikhunta se-wax, imodeli, ukulungiswa, imishini yemishini, ukucubungula isikhunta kanye neminye imikhakha. Iphinde isetshenziselwe ukwenza amafreyimu ebhayisikili e-aluminium alloy aphezulu.

Kumele kuqashelwe ukuthi nakuba i-7075 aluminium ingxubevangekunezinzuzo eziningi, kusadingeka ukuthi unake ukusebenza kwayo okungalungile kwe-welding kanye nokuthambekela kokuqhekeka kokugqwala kwengcindezi, ngakho-ke ukugqoka kwe-aluminium noma okunye ukwelashwa kokuvikela kungadingeka ekusetshenzisweni.

Ngokuvamile, ingxubevange ye-7075 aluminium inesikhundla esibalulekile emikhakheni eminingi yezimboni ngenxa yokusebenza kwayo okuhle kakhulu nokusebenza okubanzi.