| 학회 |
한국재료학회 |
| 학술대회 |
2010년 가을 (11/11 ~ 11/12, 무주리조트) |
| 권호 |
16권 2호 |
| 발표분야 |
E. Advanced Materials and processing Technology(첨단재료공정기술) |
| 제목 |
Effects of Relative Humidity on Mechanical Properties of Submerged Entry Nozzle for Continuous Casting |
| 초록 |
In the continuous casting process for steel making, the submerged entry nozzle (SEN) is a pathway of molten steel, which is used to prevent oxidation of steel from exposure to air. The changes in mechanical properties could be occurred depending on the environment condition in the manufacturing process of SEN. This study has been investigated the effects of relative humidity (RH) on microstructure and mechanical properties of SEN for continuous casting. The specimens were prepared by mixing of ZrO2, graphite, and phenolic resin as a binder. The mixed powders were stored at 5, 25, 50, 75, and 95% RH for 48hrs using a constant temperature and humidity chamber. The properties such as green density, sintered density, compressive strength, and porosity were evaluated according to relative humidity. As increased humidity level, green and sintered densities were increased by lower glass transition temperature (Tg) of binder because lower Tg improved the mobility and deformation characteristics of binder molecules during compaction. |
| 저자 |
윤상현1, 김주영1, 이준태2, 이승석3, 정두화3, 이희수1
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| 소속 |
1부산대, 2한국산업기술시험원 재료평가센터, 3포항산업과학(연) |
| 키워드 |
submerged entry nozzle (SEN); relative humidity (RH); green density; glass transition temperature (Tg); compaction
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| E-Mail |
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