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RISS 인기검색어
- 검색키워드
- 저자 : 강종렬(J. Y. Kahng) (검색결과 2 건)
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김인규(I. K. Kim),강종렬(J. Y. Kahng),노재수(J. S. Noh),박기범(K. B. Park) 한국소성가공학회 2012 한국소성가공학회 학술대회 논문집 Vol.2012 No.5
The property of zirconium alloy is well known to be influenced by pilgering pass schedule and its tooling; thus the control of its microstructure and mechanical property in the final tube product for nuclear fuel applications is a major concern of tube manufacture. To make final tube, the 3 passes pilgering is applied in general by using TREX(Tube Reduced EXtrusion), 63.5㎜ outer diameter(OD), in KEPCO NF and most of Zr tube manufacturing companies. They are also taking big efforts to reduce pilgering step for the sake of increasing the efficiency of production in the forming stage of tube. The objective of this study is to develop 2 passes of pilgering schedule from the conventional 3 passes of pilgering schedule for manufacturing the dash pot tube conforming to specification, which is newly developing component for the advanced nuclear fuel assembly in KEPCO NF.
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박기범(K. B. Park),김인규(I. K. Kim),장흥순(H. S. Chang),강종렬(J. Y. Kahng),박민영(M. Y. Park) 한국소성가공학회 2012 한국소성가공학회 학술대회 논문집 Vol.2012 No.10
The property of zirconium alloy tube is well known to be influenced by pilgering and its tooling; thus the control of its microstructure and mechanical property in the final tube product for nuclear fuel applications is a major concern of tube manufacture. It is obvious that the cold pilgering process is one of the key processes controlling the quality and the characteristics of the tubes manufactured, i.e. nuclear zirconium alloy tube in KEPCO NF. Cold pilgering is a rolling process for forming metal tubes in which diameter and wall thickness are reduced in a number of forming steps, using ring dies at outside of the tube and a curved mandrel at inside to reduce tube cross sections by up to 90 percent[1]. The OD size of tube is reduced by a pair of dies, and ID size and wall thickness is controlled simultaneously by mandrel During the cold pilgering process, both tools are the critical components for providing qualified tube. The Development of our own pilger die and mandrel has been a significantly important in the zirconium tube manufacturing and a major goal of KEPCO NF. The objective of this study is to evaluate the life time of reground pilger die for increasing life time of virgin pilger die through several times of regrinding. Therefore, the comparison of the slip factor and mechanical properties of pilger die made of AISI 52100 material was made in this study.
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