Kev piav qhia ntawm AlTiC rau txhuas alloy billet
Specification | Tshuaj Cheebtsam ntawm Al-Ti-C (%) | |||||||
Cov Ti | C | Fe | Si | V | Lwm yam | Lwm yam tag nrho | Sib npaug | |
AlTi3C0.15 | 2.6-3.4 | 0.08-0.22 | ≦0.20 | ≦0.20 | ≦0.05 | ≦0.03 | ≦0.10 | Txhuas |
AlTi5C0.18 | 4.5-5.5 | 0.13-0.23 | ≦0.20 | ≦0.20 | ≦0.05 | ≦0.03 | ≦0.10 | Txhuas |
AlTi5C0.2 | 4.5-5.5 | 0.15-0.25 | ≦0.20 | ≦0.20 | ≦0.05 | ≦0.03 | ≦0.10 | Txhuas |
AlTi5C0.2Pt | 4.5-5.5 | 0.15-0.25 | ≦0.20 | ≦0.20 | ≦0.05 | ≦0.03 | ≦0.10 | Txhuas |
AlTi5C0.2La | 4.5-5.5 | 0.15-0.25 | ≦0.20 | ≦0.20 | ≦0.05 | ≦0.03 | ≦0.10 | Txhuas |
Cuam tshuam ntawm undercooling ntawm lub laj kab ua kom zoo ntawm aluminium grain refiners
Qhov ntsuas kub siab sib npaug crystallization kub lossis thestical crystallization kub ntawm txhuas yog 660 ℃. Txawm li cas los xij, nyob rau hauv cov txheej txheem crystallization tiag tiag, qhov tseeb crystallization kub yog ib txwm qis dua qhov thestical crystallization kub. Qhov tshwm sim no hu ua undercooling phenomenon, thiab qhov kub sib txawv ntawm lawv yog hu ua undercooling degree. Lub undercooling degree yog ze ze rau qhov ntsuas txias. Qhov ceev ceev ntawm qhov ntsuas txias yog, qis qis qhov tseeb crystallization kub yuav yog thiab ntau dua qhov undercooling degree yuav. Ntawm qhov tsis sib xws, qeeb qeeb ntawm qhov tso txias txias yog, qhov tsawg dua qhov ua piv txwv undercooling yuav, thiab qhov tseeb qhov kub nyhiab qhov kub yuav nyob ze rau qhov thestical crystallization temperature.
Hauv kev hais, undercooling yog qhov sib txawv ntawm qhov theoretical thiab cov theem hloov pauv kub ntawm cov kua txhuas.
Thaum lub sijhawm crystallization thiab solidification ntawm txhuas kua, muaj ob hom undercooling.
Ib daim ntawv yog rau feem ntau cuam tshuam rau txhuas casting nto, hu ua thermal undercooling, uas yog qhov feem cuam ntawm sab nraud kub ntawm cov kua txhuas ntiav, kom nws tuaj yeem nrawm me me thiab teeb tsa equiaxed muaju. Al-Ti-B (aluminium titanium boron) cov roj lim dej tshwj xeeb tshaj yog tsim rau qhov no thermal undercooling, thiab tuaj yeem ua kom muaj txiaj ntsig zoo tshaj plaws hauv qhov chaw no. Tab sis yog tias cov thermal undercooling ntau dhau heev lawm, txheej txheej ntawm coarse acicular grain qauv feem ntau yog tsim rau ntawm qhov chaw sab hauv ntawm cov npoo zoo heev txheej nyob rau tib lub sijhawm.
Lwm daim ntawv yog feem ntau cuam tshuam rau txhuas txhuas sab hauv, hu ua kev cai lij choj undercooling. Feem ntau thaum lub sijhawm ua cov txheej txheem solidification ntawm aluminium alloy, txawm hais tias qhov tseeb kev faib tawm kub yog qee yam, kev faib tawm hauv cov kua theem hloov, uas hloov qhov theoretical solidification kub ntawm cov theem ua kua. Lub sijhawm no, cov undercooling yog txiav txim los ntawm ob yam, kev hloov pauv ntawm kev muaj pes tsawg leeg thiab kev faib tawm qhov kub thiab txias, uas ua rau cov txheej txheem undercooling. Al-Ti-C (aluminium Titanium Carbon) cov khoom siv txhim kho tshwj xeeb nyiam cov kev cai tswjhwm no, thiab tuaj yeem ua kom muaj txiaj ntsig zoo tshaj plaws hauv qhov chaw no.
Vim tias Al-Ti-C thiab Al-Ti-B feem ntau ua rau muaj qhov sib txawv undercooling ib puag ncig, cov hmoov txhuv nplej txhuas ua tiav los ntawm Al-Ti-C zoo li muaj qhov sib luag ntawm qhov loj me uas faib tawm sab hauv mus rau sab nraud hauv qhov ua kev casting. Thaum lub sijhawm, cov hmoov txhuv nplej txhuas ua kom zoo los ntawm Al-Ti-B zoo li muaj cov khoom sib txawv me me rau saum npoo thiab sab nraud ntawm lub cev casting, thiab tob hauv lub cev ntawm cov casting lub cev, qhov loj dua cov noob nplej.
Hauv txoj kev xaus, nws txawv nyob rau hauv qhov tseeb ua kom zoo dua ntawm Al-Ti-C thiab Al-Ti-B vim qhov sib txawv nyiam ua undercooling ib puag ncig. Sib raug, cov khoom siv kho tshuab thiab plasticity toughness ntawm txhuas castings kho los ntawm Al-Ti-C yuav zoo dua thiab ruaj khov.
Cov Duab Khoom
Cim npe nrov: AlTiC rau txhuas alloy billet, chaw muag khoom, tuam ntxhab, hauv Tshuag, qauv dawb, ua nyob rau hauv Suav teb
