서지주요정보
W-Ni-Fe 중합금에서 진공처리와 소결분위기가 기계적 성질에 미치는 영향 = The effects of vacuum treatment and sintering atmosphere on mechanical properties of W-Ni-Fe heavy alloy
서명 / 저자 W-Ni-Fe 중합금에서 진공처리와 소결분위기가 기계적 성질에 미치는 영향 = The effects of vacuum treatment and sintering atmosphere on mechanical properties of W-Ni-Fe heavy alloy / 이상훈.
저자명 이상훈 ; Lee, Sang-Hoon
발행사항 [서울 : 한국과학기술원, 1981].
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소장정보

등록번호

4001278

소장위치/청구기호

학술문화관(문화관) 보존서고

MMS 8118

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리뷰정보

초록정보

The effects of vacuum treatment and sintering atmosphere on mechanical properties of W-Ni-Fe heavy alloy have been studied. The compacts of 96W-2.8Ni-1.2Fe composition were sintered at 1460℃ for 1h under hydrogen atmosphere. The sintered specimens were annealed at 400-1000℃ for "0" h in vacuum. In case of 600℃, the annealing time was extended to 3h. The elongation of as-sintered specimens was about 7% at fracture with strain rate of 1 mm/min. By vacuum annealing at 700℃ and 800℃, the elongation was increased to about 15%. The highest elongation was obtained by vacuum annealing at 600℃ for 3h, and the mean value was 20%. For some specimens, sintering atmosphere was changed to nitrogen from hydrogen during sintering cycle. When the atmosphere gas was changed at about 1000℃ during cooling from sintering temperature, the elongation was increased to 17%. But the elongation and the tensile strength was decreased when the atmosphere gas was changed at sintering temperature. The tensile strength of the specimens showing low elongation was 800-900 MPa, and increased to 1000 MPa with increasing elongation value. The elongation of assintered specimens was decreased with increasing strain rate from 0.1 mm/min to 10 mm/min, but the tensile strength was increased. It is suggested that the mechanical properties of W-Ni-Fe heavy alloy could be improved by vacuum treatment at 600-800℃ or, more efficiently, by changing atmosphere gas during the cool-down period of sintering. These improvements of mechanical properties are attributed to removing the hydrogen embrittlement effect by diminution of hydrogen content in the specimens.

서지기타정보

서지기타정보
청구기호 {MMS 8118
형태사항 v, 38 p. : 삽도 ; 26 cm
언어 한국어
일반주기 부록 수록
저자명의 영문표기 : Sang-Hoon Lee
지도교수의 한글표기 : 윤덕용
지도교수의 영문표기 : Duk-Y. Yoon
학위논문 학위논문(석사) - 한국과학기술원 : 재료공학과,
서지주기 참고문헌 : p. 30-31
주제 Tungsten alloys.
Sintering.
Metals --Mechanical properties.
Elongation.
중합금. --과학기술용어시소러스
진공 처리. --과학기술용어시소러스
소결. --과학기술용어시소러스
기계적 성질. --과학기술용어시소러스
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