DOI QR코드

DOI QR Code

The study on Accelerated Life-Time Reliability Test Methods of Ni-Mn-B ternary alloy Plating(electrodeposit)

Ni-Mn-B 삼원합금도금 가속수명 및 신뢰성 평가에 대한 연구

  • 마승환 (한국건설생활환경시험연구원) ;
  • 노영태 (한국건설생활환경시험연구원) ;
  • 장건익 (충북대학교 신소재공학과)
  • Received : 2015.01.22
  • Accepted : 2015.05.07
  • Published : 2015.05.31

Abstract

Steel companies are applying Ni-B or Ni-Co alloy plating to protect the surface of Continuous casting mold, and they are using saccharin polish which causes crack on plating layer due to sulfur in saccharin. It is considered that the Ni-S compound causes the cracking and additional tensile stresses. The Ni-Mn-B ternary alloy plating was developed for suppression of crack by forming Mn-S compound before Ni-S compound is formed, but there were no domestic or international standard on the Ni-Mn-B alloy plating. Therefore, reliability evaluation standard was established to evaluate the newly developed Ni-Mn-B plating. To develop accelerating life testing method, FMEA(Failure Mode & Effective analysis) was used to analyze the cause of the main failure in plating. The Ni-Mn-B reliability standard included accelerating life test method, and it was categorized by the fundamental performance test, environment test, and accelerated life test, and was designed to guarantee 1 000 hours of B10 life with 80 % reliable level.

강 제조 회사들은 연속주조금형의 표면을 보호하기 위해 Ni-B 또는 Ni-Co 합금 도금을 적용하고 있으며, 도금 층에 균열이 생기게 하는 황을 함유한 사카린 윤활제를 사용하고 있다. 균열 및 인장 응력을 유발하는 것은 Ni-S 화합물로 여겨진다. Ni-Mn-B 삼원합금은 Ni-S 화합물이 형성되기 이전에 Mn-S 화합물을 형성하여 균열을 억제하기 위해서 개발되었으나, Ni-Mn-B 합금 도금에 관한 국내나 해외 기준이 없다. 그리하여 새로이 개발된 Ni-Mn-B 도금을 평가하기 위한 신뢰성 평가기준을 개정하려한다. 가속수명시험을 개발하기 위해 FMEA(고장형태 영향분석)가 사용되어 도금의 주요 파괴 원인을 분석하였다. Ni-Mn-B 신뢰성 기준은 가속수명시험 방법을 포함하였고, 기본 성능 시험과 환경시험, 가속수명시험으로 분류되었으며, 80% 신뢰수준으로 B10수명 1 000시간을 보장하도록 고안되었다.

Keywords

References

  1. Ji-wung Shin, Seung-gi Yang and Woon-suk Hwang, "Influences of Electrodeposition Variables on Mechanical Properties of Ni-Mn Electrodepositions" Corros. Sci. Tech. pp.102, vol 13, No. 3, 2014. DOI: http://dx.doi.org/10.14773/cst.2014.13.3.102
  2. Daejungilung "Melting processing, Pearson education korea" pp.223-229, 2000.
  3. C.L. White, J. H. Schneibel, and R. A. Padgett,, "High Temperature Embrittlement of Ni and Ni-Cr Alloys by Trace Elements" Metall. Trans. A, pp.595-610 14A, 1983. DOI: http://dx.doi.org/10.1007/BF02643776
  4. Seosungeun "MINITAB Reliability Analysis" ireatech, 2002.
  5. LEV M. KLYATIS "Accelerated Reliability And Durability Testing Technology" WILEY, 2012.
  6. Samuel Field "The Principles Of Electro-Deposition A Laboratory Guide To Electro-Plating", KESSINGER PUBLISHING, 2013.
  7. Alex Porter "Accelerated Testing and Validation" Newnes, 2004.
  8. Y.S. Park, T.H. Kim, M.H.Lee, S.C.Kwon "Study on the effect of ultrasonic waves on the characteristics of electroless nickel deposits from an acid bath" Surface & Coatings Technology 153 pp.245-251, 2002. DOI: http://dx.doi.org/10.1016/S0257-8972(01)01683-8
  9. Guangbin Yang "Life Cycle Reliability Engineering" WILEY, 2007. DOI: http://dx.doi.org/10.1002/9780470117880
  10. Luis A. Escobar and William Q. Meeker "A Review of Accelerated Test Models" Institute of Mathematical Statistics in Statistical Science, pp.552-577, Vol. 21, No. 4, 2006. DOI: http://dx.doi.org/10.1214/088342306000000321