Vim li cas tundish metering nozzle tawg thaum nruam casting?

Covtundish metering nozzleyog ib tug tub ntxhais refractory rau tswj molten steel txaus thiab casting ceev nyob rau hauv nruam casting. Nws tawg yooj yim ua rau cov hlau xau, kev tsim khoom raug kaw thiab muaj kev nyab xeeb. Changtai sau cov ntsiab lus tseem ceeb thiab cov kev daws teeb meem raws li hauv qab no:

(1) Thermal Shock & Thermal Stress (Pib Tseem Ceeb)

Tsis txaus los yog tsis sib xws preheating ua rau qhov kub thiab txias sib txawv thaum lub txias nozzle tiv tauj siab - kub molten steel, ua rau thermal stress ntau heev. Kev pib casting ntau zaus- nres ua rau rov ua kom txias thiab kub, ua rau thermal qaug zog thiab tawg nthuav dav.

(2) Cov khoom siv & ntau lawm tsis zoo

Inherent microcracks thiab pores tsim thaum nias thiab tua ua tawg qhov chaw. Zirconia theem transformation ua rau ntim hloov pauv, thiab kev sib txuas tsis zoo ntawm zirconia ua haujlwm txheej thiab alumina substrate yooj yim ua rau cov kab nrib pleb.

(3) Kev siv tshuab tsis raug

Ntau dhau clamping quab yuam, misaligned los ua ke thiab lwm yam cuam tshuam ua rau muaj zog txhua yam kev ntxhov siab. Ntev - lub sij hawm kev sib txhuam nrog zawv zawg rooj vag phaj kuj induces pib tawg.

(4) Tshuaj Erosion

Molten steel thiab tundish slag nkag mus rau hauv microcracks ntawm qhov kub thiab txias. Lub ntim expansion ntawm infiltrated tshuaj tsim ib tug wedging nyhuv, accelerating tawg nkag thiab expansion.

1. Optimize refractory mis thiab firing txheej txheem los txhim kho thermal poob siab kuj thiab tshem tawm qhov tsis xws luag.

2. Siv cov txheej txheem ua kom qeeb qeeb kom ntseeg tau tias qhov kub thiab txias tsis sib xws thiab tsis txhob hloov pauv kub.

3. Standardize installation los tswj clamping quab yuam thiab xyuas kom meej concentric los ua ke.

4. Stabilize casting parameters, tswj molten steel superheat thiab txo kev pib nquag- nres ua haujlwm.

5. Ua kom muaj zog ua ntej- siv kev tshuaj xyuas kom tsis txhob muaj cov nozzles.