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SM490A의 FCAW 용접 자세별 형상에 관한 기계적 특성 연구
임광묵,이성일 한국안전학회 2019 한국안전학회지 Vol.34 No.6
Flux Cored Arc Welding (FCAW), which has been widely used in many industries, was developed in the 1950s to supplement shortcomings of the Shielded Metal Arc Welding (SMAW). FCAW has an advantage in that it can weld regardless of postures and give good quality results in the filed with many different working conditions. In this study, SM490A (rolled steel for welding structural purpose) with different thicknesses (L:25T+R:30T) were welded using FCAW. Then the mechanical properties (tension test, bending test, hardness test, impact test and macro test) were analyzed and the following conclusions were drawn. In the tensile test, it exceeds the KS standard tensile strength range (400~510) in all welding positions, which means there is a problem in the tensile force transmission performance. In the bending test, it was found that most of the specimens did not exhibit surface rupture or other defects during bending test and they exhibit sufficient toughness even after plastic deformation. In the hardness test, all the results were lower than the standard value of 350 Hv of KS B 0893, which means they have good hardness. In the impact test, all results were larger than the KS reference value of 27J. In the macro test, they showed uniform structure state by the shape of the weld, and there was risk of lamination because no internal defects, bubbles, or impurities were found on the surface of the weld.
요추 추간판 탈출증으로 3차례 수술적 처치를 시행한 수술 실패 증후군 환자에 대한 보존적 치료 치험 1례
임광묵,문수정,전규상,신홍균,고연석,Lim, Gwang-Mook,Moon, Su-Jeong,Jun, Kyu-Sang,Shin, Hong-Kyun,Ko, Youn-Seok 척추신경추나의학회 2011 척추신경추나의학회지 Vol.6 No.2
Objectives : This study was performed to report the effect of oriental medical treatment for the failed back surgery syndrome(FBSS) patient after three times surgical operation treatment on herniated nuclues pulposus(HNP) L5-S1. Methods : A 70-year old patient after three times surgical operation treatment was admitted with low back pain and left leg radiation pain. We treated her by oriental medical treatment and measured McGill Pain Questionnaire-Short Form(SF-MPQ), visual analogue scale(VAS) and Oswestry disability index(ODI). Results : After treatment, most symptoms decreased, SF-MPQ changed 36 to 17, VAS score changed 9 to 4, ODI changed 39 to 27. Conclusions : In this study, oriental medical treatment was effective in failed back surgery syndrome patient. But the rigorous studies will be needed to define clearly that oriental medical treatment is effective in failed back surgery syndrome. 본 논문은 3차례의 양방적 수술 치료를 받은 후에도 지속적으로 요통과 함께 하지 방사통을 호소하며 일상생활 수행에 장애가 따르던 70세 여환에 대한 증례로 침구치료, 약물치료, 추나치료, 봉약침치료 등의 한의학적 보존적 치료방법으로 통증의 감소와 함께 일상생활 능력 개선에 유의한 효과를 보였다. 향후 요추 추간판 탈출증 환자의 한방적 보존적 치료에 대한 보다 다양한 연구와 임상적 고찰이 이루어져야 한다고 사료된다.