Txhuas thiab aluminium puas-kub kev kho ntawm txhuas thiab aluminium alloys (3)

Lub sij hawm ntxiv dag zog

Tom qab kev daws teeb meem thiab kev ua kom tawv ncauj, ua tawv tawv tiav ntawm chav sov (ntuj laus laus) lossis dej nag los kho (kev laus ua kom zoo nkauj). Hauv qee qhov alloys, dej nag txaus tshwm sim nyob rau hauv ob peb hnub ntawm chav tsev kub kom tsim cov khoom lag luam ruaj khov nrog cov khoom ntiag tug txaus rau ntau daim ntawv thov. Cov alloys no qee zaus raug rau kev kho tshav kub kom ua rau ntxiv dag zog thiab tawv ntawm forged thiab nrum alloys. Lwm cov alloys uas muaj kev tiv thaiv qeeb los nag ntawm chav sov yog ib txwm dej nag yuav tsum tau kho ua ntej siv. Hauv qee cov alloys, tshwj xeeb tshaj yog cov ntawm 2xxx series, qhov txias txias ua haujlwm ntawm cov khoom tshiab tshiab quenched zoo heev ua rau nws cov lus teb rau cov kev kho tom qab nag lossis daus. Mills siv qhov tshwm sim no los ua cov khoom siv zog dua los ntawm kev thov tus nqi yob (phaj thiab ntawv) lossis ncab (extrusion, bar thiab phaj). Txawm li cas los xij, yog tias muaj cov yam ntxwv siab dua yog siv rau hauv kev tsim, rov kho yuav tsum tau zam.

Lub sijhawm rau ntuj laus laus kuj yuav yog li 5 hnub rau 2xxx series alloys mus txog 30 hnub rau lwm cov alloys. 6xxx thiab 7xxx series alloys tau zoo heev txo kev ruaj ntseg ntawm chav tsev kub, thiab tau qhia kev hloov pauv ntawm cov neeg kho tshuab khoom xyoo dhau los. Rau qee qhov alloys, los ntawm kev tso hauv tub yees ntawm -18 ° C lossis qis dua, kev laus laus yuav raug kev tsim txom lossis qeeb rau ob peb hnub. Ua ntej kev laus hloov cov yam ntxwv ntawm cov khoom, nws yog ib txwm ua kom tiav kev ua, ncaj thiab embossing. Kev coj ua tso cai tso cai rau tub yees alloy 2014-T4 rivets kom muaj tus cwj pwm tsav tsheb zoo.

Artificial aging lossis nag lossis daus kho yog qhov ua kom ntev li ntawm qhov kub tsawg. Qhov kub nws li ntawm 115-200 ° C thiab lub sijhawm nws li 5-48 teev. Raws li kev daws teeb meem, kev tswj qhov kub thiab txias thiab qhov sib txawv ntawm qhov kub thiab txias yog qhov tseem ceeb rau cov txheej txheem no, thiab qhov kub yuav tsum nquag tsis pub dhau ± 7 ° C.

Kev ua tib zoo saib xyuas yuav tsum tau muab rau lub sijhawm ntawm nag lossis daus kho-hloov pauv qhov ntsuas kub. Lub sijhawm ntev thiab qhov kub siab dua yuav ua rau cov khoom loj lossis cov av poob. Lub hom phiaj yog xaiv lub voj voog uas ua rau qhov zoo tshaj plaws nag lossis daus loj thiab cov qauv xa tawm. Hmoov tsis zoo, kev voj voog yuav tsum tau ua kom siab tshaj ib qho cuab yeej (xws li lub zog tensile) feem ntau sib txawv los ntawm cov uas yuav tsum ua kom lwm cov khoom muaj zog, xws li tawm los muaj zog thiab tiv taus corrosion. Yog li no, cov voj voog siv sawv cev sawv cev ntawm kev sib koom ua ke uas muab kev sib xyaw ua ke zoo tshaj plaws.