http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
용접후열처리가 2.25Cr-1Mo 강 밸브 및 배관재 물성에 미치는 영향
김홍덕,이요섭,이재곤,이경수,Kim, Hongdeok,Lee, Yoseob,Lee, Jaegon,Lee, Kyoungsoo 한국압력기기공학회 2015 한국압력기기공학회 논문집 Vol.11 No.1
The effects of post weld heat treatment(PWHT) on the mechanical properties of 2.25Cr-1Mo steels were investigated. As the PWHT temperature or holding time increased, the strength of low alloy steels progressively decreased due to softening process. After the conventional PWHT, the strength was larger than the minimum value of materials specification. The Charpy impact energy was hardly affected by the conventional PWHT. The trend of mechanical properties was analyzed in terms of tempering parameter. Most materials replaced from a power plant met the requirements of materials specification except for one heat. Same heat of materials with low impact energy were attributed to the voids formed during casting process.