Journal of the Korea Convergence Society (한국융합학회논문지)

Korea Convergence Society (한국융합학회)
권호 표지
DOI QR코드

DOI QR Code

Mechanical Properties and cytotoxicity of nitrided 630 Stainless by ion nitriding

플라즈마 이온질화에 따른 STS 630의 기계적 특성과 세포독성에 관한 융합적 연구

  • 황갑운 (송원대학교 자연과학대학)
  • Received : 2019.10.21
  • Accepted : 2019.11.20
  • Published : 2019.11.28
Download PDF
⟨ Previous Next ⟩

Abstract

In this study, we have examined the possibility to improve the material properties and biocompatibility of the 630 stainless steel for the application of medical instruments. The evaluation of mechanical properties and biocompatibility of the 630 stainless steel were studied by aging, nitriding, SEM measurement, Vicker's hardness, tensile strength and MTT cytotoxicity using IGF cells, respectively. The results showed that the tensile strength and Vicker's hardness of 630 stainless steel was increased with aging and ion nitriding time. The cytotoxicities of the 630 stainless decreased compared with the 420 stainless on MTT cytotoxicity using IGF cells. Ion nitriding of 630 stainless led to an enhanced application of medical instruments and biocompatibility performance.

STS 630에 이온질화를 통한 기계적 특성 및 세포독성을 고찰하여 의료기구용으로 활용중인 STS 420 소재의 대체 가능성을 융합적으로 고찰하고자 하였다. STS 630 합금을 $480^{\circ}C$에서 1시간 시효처리 후 온도, 시간, 압력, 질소투입량의 변화를 통하여 이온질화 최적조건을 선정하고, 미세조직, 경도, 인장강도 등 기계적 특성의 변화와 섬유아세포(IGF cell)를 이용한 MTT 세포독성 시험을 수행하였다. STS 630의 경도는 시험결과 $400^{\circ}C$에서 질화시간 3시간 이상일 때 시간에 따라 증가하며, 질소가스 투입량에 비례하여 질화층의 두께와 표면경도가 증가함을 알 수 있었다. STS 630의 인장강도는 시효처리와 이온질화에 의해 34%의 향상이 되었으며, 의료기구로서의 적합성을 확인하기 위하여 섬유아세포(IGF cell)를 이용한 MTT 세포독성 시험의 경우에는 대조군(STS 420)에서만 세포 독성이 관찰되고, STS 630의 경우에는 세포독성이 나타나지 않아 의료기구로서의 적합성은 있는 것으로 판단된다.

Keywords

References

  1. K. Park, D. Kim, K. Kim, S. Cho, K. Takagi & H. Kwon. (2019). Semisolid State Sintering Behavior of Aluminum-Stainless Steel 316L Composite Materials. Powder Metallurgy Materials(Basel). 12(9). E1473. DOI : 10.3390/ma12091473.
  2. L. Y. Huang & M. C. Yang. (2006). Hemocompatibility of layer-by-layer hyaluronic acid/heparin nanostructure coating on stainless steel for cardiovascular stents and its use for drug delivery. J Nanosci Nanotechnol, 6(9-10),3163-70. https://doi.org/10.1166/jnn.2006.430
  3. T. I. Otani, L. A. Whiteside, S. E. White & D. S. McCarthy. (1993). Effects of femoral component material properties on cementless fixation in total hip arthroplasty. A comparison study between carbon composite, titanium alloy, and stainless steel. J Arthroplasty, 8(1), 67-74. https://doi.org/10.1016/S0883-5403(06)80110-5
  4. J. A. Sorensen, M. J. Engelman, T. Daher & A. A. Caputo. (1990). Altered corrosion resistance from casting to stainless steel posts. J Prosthet Dent.3(6), 630-7.
  5. Ministry of Science and ICT. (2016). Study on surface modification of texture changed duplex stainless steel sheet in salt bath nitriding.
  6. H. Y. On, J. H. Kong, M. J. Kim, S. J. Park, C. Y. Kang & J. H. Sung. (2010). Low temperature tensile properties of high temperature gas-nitrided duplex stainless steel. Journal of the Korean society for heat treatment 23(3), 263-268
  7. H. C. Choe, H. J. Lee & Y. W. Jeong. (2005). Corrosion and Oxidation Behaviors of lon-nitrided Tool Steels. J. of the Korean Institute of Surface Engineering, 38(3), 126-135
  8. S. W. Son & W. B. Lee. (2018). Surface Hardening and Wear Properties of AISI 410 Martensitic Stainless Steel by High & Low Temperature Gaseous Nitriding. J. of the Korean Institute of Surface Engineering, 51(4), 249-255 https://doi.org/10.5695/JKISE.2018.51.4.249
  9. Y. Eom, B. J. Lee, K. S. Nam, S. D. Kwon & H. S. Kwon. (2001). Computer Simulation for the Growth of Cr-nitride Formed on Electroplated Cr during Ion-Nitriding. J. of the Korean Institute of Surface Engineering, 34(3), 231-239
  10. G. Park. (2013). Microstructural characteristics and mechanical behavior of post-plasma ion nitrided HVOF sprayed stainless steel coating. Hanyang University.
  11. H. J. Park, S. Y. Lee, S. C. Yang, S. S. Kim & J. G. Han. (1998). Studies on the formation of CrN surface ayer by chromizing and plasma nitriding. J. of the Korean Institute of Surface Engineering, 31(6), 334-344
  12. J. S. Park. (1997). Tribological Characteristics of Plasma Ion Nitriding Surface Treatment. Dept. of Machinery and Electricity Metallurgy Division, Korean Tribilogy Society. 13(1), 589-602
  13. F. Sanchette, E. Damond, M. Buvron, L. Henry, P. Jacquot, N. Randall & P. Alers. (1997). Surface and Coating Technology, 94-95, 261-267
  14. H. J. Park. (2012). Characterization of S-phase layer of austenite stainless steel nitrided by using plasma nitriding. Hanyang University
  15. Crusible Co., Ltd. (1978). Steel Data for Buyers & Metallurgists, Masan : KTSS.