Proceedings of the KWS Conference (대한용접접합학회:학술대회논문집)

The Korean Welding and Joining Society (대한용접접합학회)
권호 표지

A Study on the Impact Toughness and Microstructure change for High Nitrogen TiN Steel Alloy with Welding Heat Input.

용접 입열량에 따른 고질소 TiN 강재의 용접부 충격인성 및 미세조직 변화에 관한 연구

  • 권순두 (현대중공업(주) 기능교육원) ;
  • 이광학 (울산대학교 첨단소재공학부) ;
  • 박동환 (현대중공업(주) 산업기술연구)
  • Published : 2004.11.01
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Abstract

This study was investigated on the impact toughness and microstructure of welded metal and heat affected zone for Hi Nitrogen TiN Steel. With welding procedures, welding heat input applied were 30, 79 and 264 kJ/cm. TiN steel has shown very small prior austenite grain size for all the welding heat input applied, which was considered to result from the effect of TiN particles. In case of single SAW and EGW welding, the dilution rate of base metal into the weld was not high, resulting that there were no significant effects of base metal chemical composition on the mechanical properties of welds. However, TSAW with double Ypreparation carried very high dilution rate so that TiN steel has impaired the toughness of weld metal because N content in the weld was increased through the dilution of base metal.

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