서지주요정보
10\%Cr 내열강의 크??파단강도에미치는 합금원소(W, B)의 영향 = The effects of alloy elements(W, B) on the creep properties of 10\% Cr steel
서명 / 저자 10\%Cr 내열강의 크??파단강도에미치는 합금원소(W, B)의 영향 = The effects of alloy elements(W, B) on the creep properties of 10\% Cr steel / 강재구.
저자명 강재구 ; Kang, Jae-Koo
발행사항 [대전 : 한국과학기술원, 1997].
Online Access 원문보기 원문인쇄

소장정보

등록번호

8007101

소장위치/청구기호

학술문화관(문화관) 보존서고

MAME 97011

휴대폰 전송

도서상태

이용가능

대출가능

반납예정일

초록정보

To improve generation efficiency, it is needed to increase temperature and pressure of steam condition. High temperature creep resistance material is required for this steam generation condition, therefore the extensive researchs have been performed to develop the high strength-heat resistance steel. 9~12% Cr steel is attractive for high strength-heat resistance steel since it has good properties, such as low cost, higher creep strength, high temperature fatigue strength, oxidation resistance and corrosion resistance. In this study, three different 10% Cr-based alloys which contain W and B were developed. The effects of W and B on high temperature creep strength and microstructure were discussed by investigation of room temperature mechanical properties, microstructures and high temperature creep properties. The conclusions of this study are as follows. The K3 alloy (0.14C-10.5Cr-0.5Mo-1.7W-0.2V-0.05Nb-0.076B) showed best creep rupture strength at 650℃ creep rupture test. The creep rupture strength is increased by the addition of Mo and W element (K3, K7) comparing with Mo addition alloy(K1), and the creep rupture strength increased with increasing W content. K3 alloy showed higher creep rupture strength than reference alloy such as TMK1 and E911. K1 alloy has the lower impact energy than K3 alloy after tempered at 700℃ although the lower hardness. That is due to the δ-ferrite phase in K1 alloy results in lower impact energy and creep rupture strength. It is investigated that the K3 alloy has more amount of fine precipitates and the recovery rate of substructure and recrystallization rate is lower than K1 alloy. It is analysed that the above results is attributed to the W and B addition. However, it is possible that the long-term creep ductility in K3 alloy is decreased due to the Fe$_2$W laves phase during creep in K3 alloy. The creep exponents(n) were measured as 8.5, 18.7 and 9.7 in K1, K3 and K7 alloy, respectively.

서지기타정보

서지기타정보
청구기호 {MAME 97011
형태사항 iv, 60 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Jae-Koo Kang
지도교수의 한글표기 : 유진
지도교수의 영문표기 : Jin Yu
학위논문 학위논문(석사) - 한국과학기술원 : 신소재공학과,
서지주기 참고문헌 : p. 56-58
주제 Effects of alloy elements(W, B) on the creep properties
크??파단강도에미치는 합금원소(W, B)의 영향
QR CODE qr code