Executive Summary & Material Selection Framework
Tsawg-siab tuag casting (LPDC) ntawm aluminium alloys xav tau riser hlab (stalk tubes) muaj peev xwm tiv taus kev immersion tsis tu ncua hauv cov hlau molten (680℃txog 750 degree), thermal shock thaum lub sij hawm cyclic pressurization, thiab tshuaj yaig. Ib txwm cam khwb cia hlau los yog hlau-raws li alloy tubes raug kev txom nyem los ntawm oxidation ceev, hlau dissolution rau hauv lub txhuas yaj, thiab nquag tu.
Peb Gas Pressure Sintered (GPS) thiab Kub Isostatically Pressed (HIP) Silicon Nitride (Si3N4) riser raj muab cov kev daws teeb meem, muab cov khoom siv siab tshaj -kub txhua yam, xoom qhib porosity, thiab tsis yog -wetting yam ntxwv tiv thaiv tsis yog -ferrous melts.
Technical Specifications & Dimensional Tolerances
Standard Performance metrics thiab manufacturing baselines. Kev cai geometries, T-flanges, thiab kev sib khi lub xub pwg nyom yog qhov tseeb-machined rau ib tus neeg siv khoom casting tshuab interfaces (xws li Sintokogio, Kurtz, Rimrock).
|
Lub cev & Mechanical Property |
Si3N4 Riser Tube Baseline |
Test Method / Standard |
|
Kev ceev ceev |
>= 3.20 g/cm3 |
Txoj Kev Archimedes (ASTM C373) |
|
Qhib Porosity |
< 0.1% (Gas-tight) |
Vacuum Impregnation Method |
|
Flexural zog (20 degree) |
800 - 950 MPa |
4-Point Bending Test (ASTM C1161) |
|
Flexural zog (800 degree) |
>= 700 MPa |
High -Tub kub khoov Test |
|
Fracture Toughness (KIC) |
6.5 - 7.2 MPa * m^(1/2) |
Indentation / SEPB Method |
|
Thermal conductivity (20 degree) |
22 - 28 W/m * K |
Laser Flash Method (ASTM E1461) |
|
Coefficient ntawm Thermal Expansion |
3.2 x 10 ^ (-6) / K (20-1000 degree) |
Dilatometry |
Outer Diameter (OD) Ntau:50mm txog 200mm (Kev kam rau siab: +- 0.3 hli).
Ntev Ntau:Txog li 1500 hli (Straightness kam rau ua<= 1.0 mm per 1000 mm).
Flange Configurations:Standard T-flanges, conical zaum, thiab kev cai hlau dab tshos los ua ke.
Daim ntawv thov qhov zoo nyob rau hauv qis -Pressure Casting
Kev tshem tawm Iron Contamination:Tsis zoo li ferrous raj, Si3N4 tsis leach hlau mus rau hauv txhuas yaj, kom ntseeg tau siab casting purity rau structural automotive thiab aerospace Cheebtsam.
Tsis yog-Tus cwj pwm ntub dej:The dense, stable surface resists slag adhesion and aluminum wetting, eliminating the need for daily scraping and significantly reducing furnace downtime.
Thermal Shock Resistance:Qhov qis thermal expansion coefficient (3.2 x 10 ^ (-6) / K) ua ke nrog cov pob txha tawg siab tiv thaiv kev tawg thaum lub sij hawm immersion ceev rau hauv molten aluminium.
Extended Service Life:Outlasts tsoos ceramic thiab hlau raj los ntawm 5x txog 10x, txo tus nqi -ib - txhaj tshuaj ntsuas rau siab - ntim cov khoom tsim.
Manufacturing Workflow & Quality Assurance
Powder Formulation & GPS Sintering:Sub-micron beta-Si3N4 hmoov yog tov nrog precision tsawg-lub ntiaj teb oxide sintering pab, zoo li tus txias isostatic pressing (CIP), thiab sintered nyob rau hauv pressurized nitrogen mus txog 10 MPa los suppress decomposition.
Precision Pob Zeb Diamond Machining:Lub ntsej muag sealing tseem ceeb, sab nraud, thiab sab hauv bores yog hauv av siv cov cuab yeej pob zeb diamond los xyuas kom cov roj- nruj zaum tiv thaiv lub tshuab kaw cov dab tshos.
Rigorous Inspection Protocols:
- Density & Microstructure Check: Qhov ntom ntom ntawm Archimedes 'txoj cai; microstructure scanned rau uniform grain faib.
- Kev ntsuas siab: Huab cua-hauv qab- dej los yog helium los kuaj xyuas kom lav xoom micro- tawg los yog roj to.
- Traceability: Txhua lub raj riser yog laser -engraved nrog tus lej cim tshwj xeeb khi rau nws Daim Ntawv Qhia Txog Cov Khoom Siv (MTR).
Cov lus nug nquag nug (FAQ) rau Foundry Buyers
Q: Vim li cas thiaj xaiv Silicon Nitride tshaj Aluminium Titanate (Al2TiO5) rau qis - siab aluminium riser raj?
A: Thaum txhuas titanate muaj cov thermal poob siab zoo, Silicon Nitride muab cov khoom siv zog zoo heev (850 MPa vs. ~ 30 MPa), muaj zog tawg ntau dua, thiab muaj kev cuam tshuam zoo dua tiv thaiv kev tsim txom thaum lub sij hawm tuav thiab ntxuav.
Q: Koj yuav ua li cas tiv thaiv huab cua los yog kev poob siab ntawm flange kev twb kev txuas?
A: Peb precision- txhuam cov flange rooj zaum kom haum rau koj qhov tshwj xeeb LPDC tshuab interface kam rau ua. Tsis tas li ntawd, peb pom zoo kom siv cov khoom siv hluav taws xob ua raws li cov khoom siv hluav taws xob ceramic thiab txheeb xyuas qhov sib txawv thaum lub sijhawm teeb tsa kom muaj roj- nruj seal.
Q: Dab tsi yog qhov kev ua haujlwm zoo tshaj plaws ntawm Silicon Nitride riser raj nyob rau hauv ib qho txhuas casting kab?
A: Nyob rau hauv ib txwm ua haujlwm (tuav lub cub tawg kub ntawm 680℃thiab 730℃nrog preheating kom zoo ua ntej immersion), peb Si3N4 riser hlab feem ntau xa cov kev pab cuam lub neej ntau tshaj 6 mus rau 12 lub hlis, nyob ntawm seb cov alloy huv si thiab lub voj voog zaus.
Q: Puas yog cov riser raj yuav tsum tau preheating ua ntej yuav dipped rau hauv molten txhuas?
A: Yog. Txhawm rau tiv thaiv kev poob siab tsis ua hauj lwm los ntawm qhov kub thiab txias gradients, cov hlab riser yuav tsum tau preheated maj mam mus rau 400℃- 600℃siv cov khoom siv hluav taws xob los yog lub tshuab hluav taws xob tswj tau ua ntej muab tso rau hauv cov hlau molten da dej.
Q: Cov ntaub ntawv dab tsi yog muab rau txhua qhov khoom xa tuaj?
A: Every shipment includes a comprehensive Certificate of Analysis (CoA) and Material Test Report (MTR) confirming bulk density, room-temperature flexural strength, open porosity, and dimensional inspection records.
Q: Koj puas tuaj yeem tsim kev cai riser raj geometries raws li kev tsim lub tshuab tsim?
A: Yog. Peb niaj hnub tsim cov kev cai ntev, txawv phab ntsa thicknesses, thiab tshwj xeeb flange tsim raws li koj CAD kos duab los yog lub cev qauv specifications.
Access Engineering Documentation & Lead Capture
Txhawm rau rub tawm Daim Ntawv Qhia Txog Cov Khoom Siv Ua tiav (MTR) qauv, CAD STEP cov ntaub ntawv rau cov txheej txheem tshuab interfaces, lossis thov kev sib tham txog kev tsim vaj tsev rau koj qhov chaw tsim khoom LPDC kab, thov xa koj cov lus qhia los ntawm peb qhov chaw muag khoom ruaj ntseg.
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