Silicon sol peev casting tau tshwm sim los ua kev tsim khoom lag luam tseem ceeb rau kev tsim cov khoom nyias nyias -cov khoom siv hlau nrog cov duab geometry. Cov txheej txheem kev tshawb fawb qib siab no ua ke nrog kev ua tiav ntawm cov peev txheej niaj hnub nrog kev txhim kho lub plhaub lub zog thiab thermal stability, ua rau nws tshwj xeeb tshaj yog haum rau aerospace, kev kho mob, thiab kev siv hluav taws xob qhov twg nyias ntu (0.3-1.5mm) thiab nruj kam rau ua (± 0.1mm) yog qhov tseem ceeb.
Txheej txheem Optimization Strategies
1. Shell System Engineering
Niaj hnub nimno silicon sol binder systems siv nano-sized silica hais los tsim ceramic pwm nrog tshwj xeeb ntsuab lub zog thiab raug rho tawm permeability. Optimal slurry formulations rau nyias phab ntsa yuav tsum:
● 22-28% silica sol cov ntsiab lus los ntawm qhov hnyav
● Zircon hmoov / alumina blend refractories (200-325 mesh)
● Tswj viscosity ntawm 25-35 vib nas this (Ford Cup #4)
Cov txheej txheem dipping txheej txheem siv cov txheej txheej ntxhib thiab zoo zoo nkauj, nrog rau thawj ob lub tsho loj siv 80-120 mesh zircon xuab zeb rau qhov ruaj khov.
2. Wax Pattern Design
Nyias-cov khoom siv phab ntsa xav tau cov qauv siv quav ciab tshwj xeeb nrog:
● 0.3-0.6% linear shrinkage them nyiaj
● High flowability (Melt Index >30g / 10 mins)
● Txhim kho rigidity los tiv thaiv lub plhaub -lub tsev distortion
3D luam wax qauv tam sim no ua tiav<0.05mm positional accuracy for prototypes and low-volume production.
3. Tswj Solidification
Computational fluid dynamics (CFD) simulations optimize:
● Pouring kub (150-200℃saum cov kua dej)
● Gradient txias tus nqi (5-15℃/ sec)
● Strategic chill phaj tso
Cov kev ntsuas no tiv thaiv cov mistuns hauv cov ntu nyias thaum txo cov kua muag kub. Nqus -pab pouring txo cov pa nkag rau hauv txoj kab nqaim.
Kev ua haujlwm tau zoo
Cov ntaub ntawv tshawb fawb tsis ntev los no qhia tau tias:
● 40% txo qis hauv lub plhaub tawg piv rau cov khoom sib xyaw ua ke
● Nto roughness (Ra) txhim kho los ntawm 3.2μm mus rau 1.6μm
● 99.2% dimensional conformity ntawm 0.5mm airfoil seem
HIP kev kho mob ntxiv ua kom nyias- phab ntsa ntom ntom, nrog rau qib porosity<0.1% achievable.
Cov ntawv thov kev lag luam
● Turbine hniav: 0.3mm cua txias raws hauv IN718
● Kev kho mob implants: 0.5mm lattice structures hauv CoCr
● Electronics tsev: 1.2mm phab ntsa hauv AlSi10Mg
Optimized silicon sol peev casting muab lub peev xwm tsis sib haum xeeb rau nyias -walled precision Cheebtsam. Kev nce qib txuas ntxiv hauv kev tsim qauv, nano- cov ntaub ntawv slurries, thiab kev sib koom ua ke ntawm kev tsim khoom yog thawb cov ciam teb ntawm cov phab ntsa thicknesses uas ua tau zoo thaum tswj kev ua haujlwm zoo.
