http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
A Study on the Fatigue Life of ADI
임복규 한국주조공학회 2008 한국주조공학회지 Vol.28 No.1
본연구는 ADI 의기계적성질을개선하고자오스테나이트화과정에서초기변태온도를 900oC (γ 구역) 에서시작하여 800oC 까지(α + γ 구역) 일정한냉각제어에의해오스템퍼링을한다. 여기서 Full ADI 에서생성되는고탄소오스테나이트조직을저탄소오스테나이트로유도하고미세한침상의 Full ADI 조직을연성이높은조대한아공석페라이트조직이생성되도록하여 Semi ADI 를만든다. Full ADI 와 Semi ADI 의기계적성질및피로강도를연구한결과 Full ADI 와 Semi ADI 의정적강도는유사하지만, 피로강도는 Semi ADI 의기지조직의변화에기인하여 Full ADI 보다피로강도가높게나타났다. 이러한현상은 Semi ADI 의조대한페라이트가균열개구저항력이낮아초기에는쉽게개구되지만, 균열개구와동시에균열선단에서큰소성역이발생되어균열성장이지연하는효과로판단된다.
Peudomonas putida H-5에 의한 포름알데히드의 생분해
류병호,임복규 한국생물공학회 1993 KSBB Journal Vol.25 No.1
본 연구는 포름알데히드를 분해하는 균주를 하천의 진흙에서 6종 분리하고 그 중에서 포름알데히드의 분해능이 가장 우수한 균주인 H-5을 분리동정하여 Pseudomonas putida H-5라고 명명 하였다. Pseudomonas putida H-5의 최적 생장조건은 온도 $30^{\circ}C$, pH 7.0이었고, 포름알데히드는 0.02~0.04% 의 농도에서 가장 분해가 잘 되었고, 기질로는 glucose가 가장 우수하였다. Pseudomonas putida H-5에 의하여 포름알데히드는 메탄올과 개미산으로 분해되며 이는 균주의 생육에 아무런 영향을 미치지 않았다. This study was designed to reveal the characteristics of the strains degrading formaldehyde isolated from mud of waste water. A strain H-5 showed the highest ability of formaldehyde biodegradation among isolated strains. According to identification, the strain H-5 was ascribed to be Peudomonas putida H-5. The optimal conditions of Peudomonas putida H-5 were $30^{\circ}C$ and pH 7.0. The highest level of formaldehyde degradation was demonstrated at the concentration of 0.02~0.04% in a glucose containing medium. Formaldehyde biodegradation by Peudomonas putida H-5 indicated that this reaction was converted to the methanol and formic acid. However, methanol and formic acid did not show any effect on the growth of viable cells.
마하피닝 처리에 의한 기계구조용 합금강의 피로균열전파 지연효과
김민건,임복규,박홍기,황중각 강원대학교 산업기술연구소 2006 産業技術硏究 Vol.26 No.A
Mach peening treatment is one of the various kinds of techniques to improve the fatigue properties. The mach peening process gives high-level work hardening and compressive residual stress near the surface layer, improving the fatigue strength. In addition, this treatment reduces slip bands that initiate the fatigue cracks near the surface. During impingement, a plastic indentation surrounded by a plastic zone is formed. Mach peening treatment characteristic is less energy consumption and is an environmental friendly processing methods that is not accompanied by pollution. It is machining process that can prevent fatigue fracture beforehand in structure using already as well as process of production. The test results showed that fatigue crack propagation delay appeared by drilling type 43%, mach peening type 110%.
극저사이클 하중을 받는 구상흑연주철의 초기균열성장에 관한 연구
김민건,임복규,김동열 江原大學校 産業技術硏究所 2002 産業技術硏究 Vol.22 No.A
In this study, extremely low cycle fatigue tests were carried out under push-pull loading conditions using graphite cast iron (GCD). In order to clarify the fatigue fracture mechanism of GCD in an extremely low cycle fatigue regime successive observations of internal fatigue damage were performed. The results obtained are as follows. (1) The process of extremely low cycle fatigue can be classified into three stages which are composed of the generation, growth and coalescence of microvoids inside materials. (2) In an extremely low cycle fatigue regime, microvoids originate from debonding of graphite-matrix interface.
마하피닝 처리에 의한 기계구조용 합금강의 피로균열전파 지연효과
김민건,임복규,박홍기,황중각 강원대학교 산업기술연구소 2006 産業技術硏究 Vol.26 No.B
Mach peening treatment is one of the various kinds of techniques to improve the fatigue properties. The mach peening process gives high-level work hardening and compressive residual stress near the surface layer, improving the fatigue strength. In addition, this treatment reduces slip bands that initiate the fatigue cracks near the surface. During impingement, a plastic indentation surrounded by a plastic zone is formed. Mach peening treatment characteristic is less energy consumption and is an environmental friendly processing methods that is not accompanied by pollution. It is machining process that can prevent fatigue fracture beforehand in structure using already as well as process of production. The test results showed that fatigue crack propagation delay appeared by drilling type 43%, mach peening type 110%.
회전원판반응조에 의한 Peudomonas putida H-5의 포름알데히드의 연속적 분해
류병호,임복규 한국생물공학회 1993 KSBB Journal Vol.25 No.1
Continuous degradation of formaldehyde by using a rotating disc contactor was investigated in this study. Peudomonas putida H-5K was selected as a mutant using N-methyl N'-nitro N-nitrosoguandine (250$\mu\textrm{g}$/$m\ell$), which showed 1.5 times higher ability of formaldehyde degradation than that of the parent strain. Enzyme activity for formaldehyde degradation released form Peudomonas putida H-5K showed the highest level of 6.2mo1/min/mg protein in the 2% glucose mineral medium containing 0.02% formaldehyde. Degradation of formaldehyde from the first stage in rotating disc contactor was 95% and 5% from the 4th stage when the reactor was fed with 0.02% or 0.04% formaldehyde solution at a rate of 20$m\ell$ per hour. Continuous degradation of formaldehyde using rotating disc contactor was above 95%o in the medium containing 0.04% formalchyde, at the medium feed ratc of 20$m\ell$ per hour.