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논문 기본 정보

자료유형
학술저널
저자정보
이인규 (원광보건전문대학 치기공과) 김용원 (원광대학교 치과대학 부속병원 치과기공실)
저널정보
대한치과기공학회 대한치과기공학회지 대한치과기공학회지 제19권 제1호
발행연도
1997.1
수록면
5 - 12 (8page)

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초록· 키워드

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To examine the difference of castability of non -precious porcelain metal according to 2 type of investing method, experiments were carried out using the method of both existing investing method and the investment with spaces to the upper & lower parts of the ring. The following conclusion were obtained from the result. 1. Seperataly using the existing investment and with spaces to the upper & lower parts of the ring, 44 samples resulted in success with the former method and 52 with the latter out of 84 samples. 2. Under the existing investing method, 44 samples out of 56 total resulted in success when the temperature of the ring was $870^{\circ}C$, and all samples failed when the temperature was $800^{\circ}C$. 3. Under the investment that gives space to the ring, when casted with the temperature of the ring fixed at $870^{\circ}C$, 40 samples out of 56 and 17 samples with the temperature fixed at $800^{\circ}C$ resulted in success. 4. Under the existing investing method with the temperaure of the ring fixed at $870^{\circ}C$ and heat soaking time given an hour, 26 out of 28 samples resulted in success and 18 resulted the same with half an hour heat soaking time. 5. Using the investment that gives space to the ring, at ring temperature $870^{\circ}C$ with heat soaking time 1 hour, all of total 28 rusulted insuccess however only 12 smaples succeeded with 30 minutes heat soaking time. 6. Under the existing investing method, samples with heat soaking time 1 hour equally given at ring temperature $870^{\circ}C$, 26 samples out of 28 succeed however at $800^{\circ}C$ all samples failed. 7. In the case of ring's upper and lower parts opened ring temperature is $870^{\circ}C$ and $800^{\circ}C$ and the heat soaking time was fixed at 1 hour, all 28 samples resulted in success and at $800^{\circ}C$ 17 succeed.

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