• Proceedings of the KWS Conference
• /
• 1994.05a
• /
• pp.133-135
• /
• 1994

• Proceedings of the Korean Society for Technology of Plasticity Conference
• /
• 1999.06a
• /
• pp.145-156
• /
• 1999

• 월간 기계설비
• /
• s.17
• /
• pp.106-111
• /
• 1991

최근 주택의 건축공법에 적합하고 시공성이 매우 좋은 배관공법으로, 스텐레스강 후렉기블관 공법이 개발되었다. 더욱이 본 공법을 활용하여 기존 주택의 내장재에 영향을 주지 않고 가스배관을 갱신할 수 있는 보호관내 배관 공법이 실용화되었다.

• Proceedings of the Korean Nuclear Society Conference
• /
• 2001.05a
• /
• pp.312.1-312
• /
• 2001

• Proceedings of the KWS Conference
• /
• 1990.04a
• /
• pp.131-134
• /
• 1990

• Proceedings of the KWS Conference
• /
• 1994.10a
• /
• pp.173-176
• /
• 1994

• Proceedings of the Korean Nuclear Society Conference
• /
• 2001.10a
• /
• pp.214.1-214
• /
• 2001

• Proceedings of the Korean Society of Precision Engineering Conference
• /
• 2004.10a
• /
• pp.1369-1375
• /
• 2004

For many years and primarily for economical reasons, Dissimilar Metal Welds have been used as transition joints in a variety of equipment and applications. But Dissimilar Metal Welds have several fabrication and metallurgical drawbacks that can often lead to in-service failures. For example, the most pronounced fabrication faults are hot cracks. Laser welding techniques have been characterised for various materials. In this paper, the laser weldability of STS304 stainless steel and SM45C at dissimilar metal welds using a continuous wave Nd：YAG laser are experimentally investigated. An experimental study was conducted to determine effects of welding parameters, on eliminating or reducing the extent welding zone formation at dissimilar metal welds and to optimize those parameters that have the most influence parameters such as focus length, power, beam speed, shielding gas, and wave length of laser were tested

• Journal of the Korean Society for Precision Engineering
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• v.19 no.1
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• pp.219-226
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• 2002

The mechanical etching technique has recently been developed to a powder blasting technique for various materials, capable of producing micro structures larger than 100$\mu$ m. This paper describes the performance of powder blasting technique in micro-pocketing of stainless steel and the effect of the number of nozzle scanning and the nozzle height on the depth and width of pockets. Experimental results showed that increasing the no. of nozzle scanning and decreasing the nozzle height resulted in the increase of depth and width in pockets. Increase of width results from wear of mask film.

• Journal of the Korean institute of surface engineering
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• v.32 no.2
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• pp.172-181
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• 1999

The effect of the DMAB concentration, temperature, deposition time, and stabilizer concentration on the precipitation reaction of the electroless nickel plating using dimethylamine borane (DMAB) as reducing agent was investigated to by the weight gain and electrochemical method. The deposition rate was dependent with DMAB concentration. The polarization resistance of the precipitation reaction was reduced with DMAB concentration. The precipitation reaction rate of Ni-B deposits was controlled by the oxidation rate of DMAB as the source of electron. The boron content of the deposit was constant at about 5.5wt%, even when DMAB concentration in the solution was increased. The effect of temperature and stabilizer ($Pb(NO_3)_2$) concentration on deposition rate was shown to have co-dependent behaviors.