Dab tsi yog Kev faib tawm thiab qhov zoo ntawm Cast Aluminium Alloys

Dab tsi yog qhov kev faib tawm thiab qhov zoo ntawm cam khwb cia aluminium alloys
Cam khwb cia txhuas alloy yog ib qho txhuas alloy uas tuaj yeem ncaj qha tau qhov chaw los ntawm cov txheej txheem hlau casting. Cov ntsiab lus ntawm cov ntsiab lus ntawm hom aluminium alloy casting no feem ntau siab dua li ntawm cov sib xyaw forged aluminium alloy.
1, Kev faib tawm ntawm cam khwb cia aluminium alloys.
Muaj plaub hom cam khwb cia txhuas alloys raws li lub ntsiab alloying ntsiab.
1. Aluminium silicon alloy, tseem hu ua "silicon aluminium" lossis "silicon aluminium". Nws muaj zoo casting thiab hnav tsis kam, tsis tshua muaj coefficient ntawm thermal expansion, thiab yog qhov loj tshaj plaws ntawm cam khwb cia txhuas alloys, nrog rau cov ntsiab lus ntawm silicon loj tshaj plaws ntawm 4% ~ 13 feem pua. Qee zaum 0.2 feem pua ​​​​rau 0.6 feem pua ​​magnesium silicon aluminium alloy yog ntxiv thiab dav siv hauv cov khoom siv xws li plhaub, lub tog raj kheej, lub thawv, thav ntawv, thiab lwm yam. Qee zaum ntxiv qhov tsim nyog ntawm tooj liab thiab magnesium tuaj yeem txhim kho cov khoom siv dag zog thiab kev ua haujlwm kub ntawm cov hlau. Cov hlau no tau siv dav hauv kev tsim cov pistons thiab lwm qhov chaw.
2. Aluminium tooj liab alloy, nrog rau cov alloy uas muaj 4.5 feem pua ​​​​rau 5.3 feem pua ​​tooj liab, muaj qhov zoo tshaj plaws ntxiv zog. Kev sib ntxiv ntawm manganese thiab titanium tuaj yeem txhim kho lub zog thiab castability ntawm chav tsev thiab kub. Feem ntau yog siv rau kev tsim cov xuab zeb castings nrog loj zoo li qub thiab dynamic loads thiab cov duab yooj yim.
3. Al Mg alloy, cam khwb cia aluminium alloy nrog qhov ceev tshaj plaws (2.55g / cm3) thiab lub zog siab tshaj plaws (kwv yees li 355mpa), muaj 12 feem pua ​​​​ntawm magnesium thiab muaj cov txiaj ntsig zoo tshaj plaws. Cov hlau no muaj qhov zoo corrosion kuj nyob rau hauv cov huab cua thiab dej hiav txwv, thiab muaj kev zoo txhua yam thiab machining zog ntawm chav tsev kub. Nws tuaj yeem siv rau qhov chaw xws li lub hauv paus radar, lub cav dav hlau casings, propellers, tsaws iav, thiab tseem tuaj yeem siv los ua cov ntaub ntawv zoo nkauj.
4. Aluminium zinc alloy, feem ntau ntxiv nrog silicon thiab magnesium los txhim kho nws cov kev ua tau zoo, feem ntau hu ua "zinc silicon aluminium". Nyob rau hauv cov xwm txheej casting, cov hlau muaj cov nyhuv quenching, hu ua "self quenching". Nws tuaj yeem siv yam tsis muaj kev kho cua sov, thiab tom qab kev hloov kho thiab kev kho cua sov, lub casting muaj lub zog siab. Kev ruaj khov ntawm qhov loj tom qab kev ruaj khov, feem ntau yog siv los ua cov qauv, cov qauv, thiab cov khoom txhawb nqa.
2, Qhov zoo ntawm casting aluminium alloys.
1. Cov khoom lag luam zoo: siab qhov tseeb ntawm castings, feem ntau sib npaug rau 6-7 lossis txawm 4 daim; Kev ua tiav zoo, feem ntau sib npaug rau 5-8 qib; Feem ntau, lub zog yog 25-30 feem pua ​​​​siab dua cov xuab zeb casting, tab sis qhov elongation yog txo los ntawm 7 0 feem pua. ruaj khov loj thiab zoo interchangeability; Piv txwv li, qhov tsawg kawg nkaus phab ntsa thickness ntawm zinc alloy tuag-casting txhuas qhov chaw tuaj yeem ncav cuag 0.3mm; Aluminium alloy castings tuaj yeem ncav cuag 0.5mm; Qhov tsawg kawg nkaus casting aperture yog 0.7 millimeters; Qhov kev ncua deb tsawg kawg yog 0.75 millimeters.
2. Kev ua haujlwm siab ntau lawm: Lub tshuab ua haujlwm siab. Piv txwv li, domestic kab rov tav cua txias tuag-casting tshuab tuaj yeem cam khwb cia txhuas 600-700 zaug ntawm qhov nruab nrab hauv 8 teev, thaum me me kub chamber tuag-casting tshuab tuaj yeem nrum txhuas 3000-7000 zaug ntawm qhov nruab nrab hauv 8 teev. Tuag cam khwb cia txhuas pwm muaj lub neej ua haujlwm ntev. Ib khub ntawm txhuas tuag-casting pwm thiab tuag-casting txhuas saib alloys tuaj yeem siv ntau pua txhiab lossis ntau lab lub sijhawm. Mechanization thiab automation yog qhov yooj yim kom ua tiav.
3. Cov txiaj ntsig kev lag luam zoo ntawm casting aluminium alloys: vim qhov loj me thiab du nto ntawm nias aluminium qhov chaw. Feem ntau, nws tsis yog siv rau kev ua tab sis siv ncaj qha, los yog cov khoom ntim me me, uas tsis tsuas yog txhim kho kev siv cov hlau, tab sis kuj txo cov khoom siv ntau thiab cov sij hawm ua haujlwm; Pheej yig castings