Aluminium alloys: Properties thiab Metalworking

Aluminium - npaum li cas yuav tsum tau raws li lub hlau nyob rau hauv kev tsim kho, raws li tau zoo raws li nyob rau hauv lwm yam spheres ntawm tib neeg kev ua si. Txawm li cas los, nyob rau hauv nws cov ntshiab daim ntawv nws yog siv heev tsis tshua muaj. Qhov tseem nquag siv txhuas alloys.

Tag nrho alloys yuav tau muab faib mus rau hauv casting thiab wrought. Tus thawj zoo yog manufactured los ntawm melting thiab alloys rau manufacturing lub thib ob hom ntaub ntawv siab. Casting txhuas alloys feem ntau hais txhuas compound nrog silicon. Tej co yog check, muaj siab xeb kuj, zoo txiav. Raws li rau wrought alloys, ntawm lawv nto moo yog duralumin, nyob rau hauv uas cov qauv yog txhuas, magnesium thiab tooj liab. Qhov no hlau hlau yog manufactured, profile, ntawv, daim kab xev. Txheej txheem hlau yuav tsum tau nthuav tawm los ntawm kev txhais tau tias.

Thaj chaw ntawm txhuas alloys yuav tau muab faib mus rau hauv lub cev, neeg kho tshuab thiab tshuaj. Nrog hais txog lub zog, lub alloys muaj ze li ntawm tib yam ceev li lub txhuas nws tus kheej. Lawv muaj siab zog, uas yuav lwv nrog titanium thiab hlau. Tiam sis ntawm no yuav tsum tau muab sau tseg hais tias lub melting kub ntawm lub alloy yog me me (nws yog hais txog 200 degrees). Nws yog noteworthy tias cov txhuas alloys muaj zoo thermal conductivity, remarkably kev hluav taws xob tam sim no zoo welded thiab resistant mus xeb, txawm hais tias ntshiab txhuas, cov zog muaj ntau.

Raws li hais tus txhua yam khoom, lawv ua siab nrog ua degree ntawm doping. Nthuav txhuas alloys yog siv rau cov kev siv ntawm cov lug ntawm tsawg thiab nruab nrab loading. Nws yuav tsum tau muab sau tseg tias thaj chaw ntawm lub alloys yog lom zem ntau hloov tom qab cua sov mus rau ib tug tej yam kub, uas txiav txim thiab siv.

Raws li cov hlau ua ntej yuav siv qhov yuav tsum tau rau cov txheej txheem, thiab los tsim kev designs alloying ntsiab yuav tsum tau welded, koj yuav tsum xyuam xim rau lub fact tias cov vuam ntawm txhuas alloys muaj tej yam nta. Cov txheej txheem no muaj ib co teeb meem:

- nyuaj alloys yog welded vim hais tias cov oxide zaj duab xis uas zoo nkaus li nyob rau hauv cov nplaim hlau (nws feem ntau lom lub leeg, thiab qhov no tes nrog rau tej alloying hlau npoo);

- lub oxide zaj duab xis thiab cov hlau nws tus kheej muaj ntau melting ntsiab lus, qhov txawv yuav ua tau ntau yam pauv loj;

- vim casting txhuas extension yog siab txaus, tom qab lub Vuam hlau muaj tiag deformed;

- alloys muaj lub siab turnover, li ntawd, lub Vuam currents zaum yuav tshwm sim nyob rau hauv cov hlau.

Rau vuam alloys mas siv carbon los yog hlau electrodes. Cov txheej txheem yog ua nrog ib tug tsis tu ncua tam sim no ntawm opposite polarity. Ua ntej yuav pib ua hauj lwm rau hauv lub chaw ua hauj lwm daim yuav tsum tau kho nrog acetone los yog benzine thiab huv si steel txhuam. Yuav kom zoo zoo vuam tau dhau los, nws yog tsim nyog los ua cua sov rau welded qhov chaw mus rau ib tug predetermined kub (200 degrees). Yuav kom tau ib tug zoo leeg tom qab vuam yuav tsum tau txias maj mam.