Puas yuav zirconia nozzle tawg sai li sai tau thaum lub ncuav pib?
May 11, 2026
Muab hais tias cov txheej txheem kev khiav hauj lwm yog ua raws thiab lub nozzle raug ntsia kom raug, azirconia nozzleyuav tsis tawg tam sim ntawd thaum pib pouring. Cov khoom siv zirconia tau txais kev kho mob tshwj xeeb (xws li ib nrab yttrium stabilization) thiab muaj cov thermal poob siab heev. Txawm li cas los xij, kev pheej hmoo ntawm kev tawg yuav nce ntxiv yog tias muaj cov khoom siv tsis raug, kev teeb tsa tsis raug, lossis cov txheej txheem tsis raug.
Qhov Tiag Ua Rau Zirconia Nozzle Fracture
1. Preheating tsis txaus (Qhov feem ntau tshwm sim)
Although zirconia nozzles are resistant to thermal shock, there is still a risk when they are exposed to high-temperature molten metal (>700 degree) ncaj qha los ntawm chav tsev kub (25 degree), vim qhov kub sib txawv tshaj 600 degree. Nws raug nquahu kom preheat lub nozzle rau 300-500℃ua ntej siv.
2. Internal Microcracks los yog Sintering Defects
Tsawg-cov nozzles zoo yuav tsim porosity, txheej tawg, lossis microcracks thaum tsim khoom; Cov teeb meem no tuaj yeem ua raws li cov ntsiab lus kev ntxhov siab.
3. Kev teeb tsa ntau dhau kev nyuaj siab
Yog hais tias muaj kev sib cuag tsis nruj los yog muaj kev cuam tshuam ntawm lub nozzle thiab lub mounting fixture, lub pre- compressive kev nyuaj siab tshwm sim los ntawm ntau nruj torque, ua ke nrog thermal expansion stress, yuav yooj yim ua rau nkig puas.
4. Cov khoom thaiv txawv teb chaws
Yog tias cov khoom seem lossis cov khoom txawv teb chaws muaj nyob rau hauv cov neeg khiav dej num thaum pib nchuav, qhov cuam tshuam tam sim ntawd tuaj yeem tsim kev kub ntxhov hauv cheeb tsam.
5. Kev caij tsheb kauj vab kub hnyav
Qee cov txheej txheem xav tau ntau lub voj voog sib law liag. Yog tias qhov txias tshwm sim sai heev (xws li, vim yog kev sib cuag nrog cov xuab zeb ntub dej los yog dej), cov thermal qaug zog thaum kawg yuav ua rau tawg.
Kev siv Scenario
| Kev siv Scenario | Kev tshwm sim | Ua rau Analysis |
|---|---|---|
| Lub tuam txhab A: Aluminium alloy tuag casting, nozzle preheated rau 450 degree, qeeb pib pouring | Tsis tawg tom qab 1500 siv sib law liag | Tsim nyog preheating thiab tswj cov cua sov / cua txias |
| Tuam txhab B: Tsis muaj preheating, ncaj qha pouring ntawm siab -kub tooj liab kua | Cracking tshwm sim ntawm 3rd thib ob | Thermal shock kub sib txawv mus txog 1100 degree |
| Lub tuam txhab C: Preheated rau 300 degree, tab sis lub nozzle muaj qhov pom tsis pom kev tawg vim poob rau hauv av | Cracking tshwm sim 5 vib nas this tom qab pouring pib | Kev ntxhov siab concentration tshwm sim los ntawm kev puas tsuaj rau lub tshuab |
Yuav Ua Li Cas Tiv Thaiv Zirconia Nozzles los ntawm Cracking
Ua raws li cov txheej txheem preheating
Siv lub qhov cub los yog lub teeb kom sov lub nozzle sib npaug rau 1/3 mus rau 1/2 ntawm qhov kub thiab txias (piv txwv li, preheat rau 350℃thaum pouring molten aluminium ntawm 700 degree), thiab tuav qhov kub ntawm 10-15 feeb.
Tshawb xyuas Surface thiab Internal Quality
Visually soj ntsuam rau chipped npoo los yog tawg ua ntej siv; ua dye penetrant test yog tias tsim nyog. Tsis txhob siv cov nozzles uas tsis paub keeb kwm los yog cov uas khaws cia rau ntau tshaj ob xyoos.
Kev txhim kho kom zoo thiab nruab nrab
Siv cov shims hloov tau yooj yim (xws li graphite ntawv) los siv lub siab sib npaug, tsis txhob muaj kev ntxhov siab ntawm ib qho taw tes. Khaws torque nyob rau hauv ± 10% ntawm tus nqi pom zoo.
Tswj Initial Pouring Flow Rate
Pib nrog tus nqi qis qis kom sau lub nozzle. Ua kom tus nqi ntws tsuas yog tom qab lub nozzle tau mus txog qhov kub tsis sib xws thoob plaws kom tsis txhob muaj kev kub ntxhov tam sim ntawd - ntws cuam tshuam.
Tsis txhob ya raws thiab roj paug
Lub nozzle nto thiab sab hauv yuav tsum qhuav thiab huv si. Tshuab- tawm lub nozzle nrog cua kub ib zaug ntxiv ua ntej nchuav.
Kev Hloov Kho thiab Sau Cov Ntaub Ntawv -Kev khaws cia
Khaws ib daim ntawv teev kev pab cuam lub neej. Lub neej kev pab cuam ntawm zirconia nozzle yog 500-2,000 pours; hloov proactively ua ntej mus txog rau sab sauv txwv.
Nrog rau niaj hnub, siab - cov txheej txheem tsim khoom zoo,zirconia nozzlestau dhau los ua ib qho kev txhim khu kev qha rau cov tsoos hlau nozzles thiab txheem ceramic nozzles. Tsuav koj ua raws li cov hauv paus ntsiab lus rau preheating, installation, kev khiav hauj lwm, thiab txij nkawm, koj tuaj yeem siv lawv nrog kev ntseeg siab.
Thib peb -kev tshuaj xyuas tog muaj
