• 제목/요약/키워드: 스텐레스강

검색결과 15건 처리시간 0.026초

새로운 도시가스 배관공법의 개발과 실용화

  • 내산박일
    • 월간 기계설비
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    • 통권17호
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    • pp.106-111
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    • 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.

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CW Nd:YAG 레이저를 이용한 SM45C와 STS304의 이종금속용접 (Dissimilar Metal Welding of SM45C and STS304 by means of CW Nd:YAG Laser)

  • 신호준;유영태;임기건;안동규
    • 한국정밀공학회:학술대회논문집
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    • 한국정밀공학회 2004년도 추계학술대회 논문집
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    • pp.1369-1375
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    • 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

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Powder Blasting에 의한 미세 포켓의 기계적 에칭 (Mechanical Etching of Micro Pocket by Powder Blasting)

  • 박경호;오영탁;박동삼
    • 한국정밀공학회지
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    • 제19권1호
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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.

DMAB를 사용한 무전해 Ni-B 합금 도금 I. 오스테나이트 스텐레스강 상의 석출반응에 대한 전기화학적 거동 (A Study on Electroless Ni-B Plating with DMAB as Reducing Agent. I. The Electrochemical Behavior of Precipitation Reaction on Austenite Stainless Steel Substrates)

  • 이창래;박해덕;강성군
    • 한국표면공학회지
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    • 제32권2호
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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.

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