듀플렉스강의 레이저 열처리

• 영문명: Laser surface treatment of duplex stainless steel
• 발행기관: 한국레이저가공학회
• 저자명: 김필규(P. K. Kim) 이명화(M. H. Lee) 정성호(S. H. Jeong)
• 간행물 정보: 『한국레이저가공학회 학술대회 논문집』2008년도 추계학술발표대회 논문집, 170~173쪽, 전체 4쪽
• 주제분류: 공학 > 기계공학
• 파일형태: PDF
• 발행일자: 2008.11.30

영문 초록

Duplex stainless steel is a preferred material for a high temperature and pressure pump of a seawater desalination plant due to its high corrosion resistance and hardness. Despite the good hardness of duplex stainless steel, rotating pump components such as ring, bush, or sleeve require regular replacements due to friction wear, requiring surface treatment of those rotating components for obtaining higher surface hardness. In this work, experimental results for CW laser heat treatment and laser peening of duplex stainless steel for an enhancement of surface hardness are reported. In CW laser heat treatment, irradiation with a Nd-YAG laser and quenching with liquid nitrogen was carried out. while in laser peening a pulsed Nd-YAG laser irradiation was conducted in a water chamber. The results revealed that CW laser irradiation could not improve surface hardness of duplex stainless steel, whereas laser peening showed evidences of surface hardness improvement.