Fe 계 합금의 적층결함에너지를 감소시키는 거승로 알려진 vanadium이 Fe-20Cr-1.7C-1Si합금의 미세조직과 고온 마모저항성에 미치는 영향에 대하여 조사하였다. Fe-20Cr-1.7C-1Si-xV (x=0, 1, 3, 6, 10wt.%)조성에서 오스테나이트 기지상을 유지하면서 첨기될 수 있는 V의 최대 첨가량은 약 3wt.%이었으며 오스테나이트 기지상을 갖는 합금은 상온에서 낮은 적층결함에너지와 γ->α 변형유기 상변태에 의해 페라이트 합금보다 높은 마모저항성을 보인 것으로 생각된다.225˚C에서 α 생성량도 많은 것으로 보다 V은 Fe-20Cr-1.7C-1Si 합금의 온도에 따른 적층결함에너지 증가율를 억제하고 Md온도도 증가시킴으로써 고온 마모저항성을 증가시키는 것으로 생각된다.

In 2004, 300km/h speed of high-speed rail was introduced in Korea. In recent years, policies and technologies are being developed with the goal of increased speed higher than 400km/h. HEMU-430X vehicles have been developed during the test, and technology-related infrastructure is under development. In addition, studies are underway for improving the speed of 500km/h or more. In more than 400km/h, track irregularity due to bearing force of track is increasing rapidly. In this study, applicability for the track structure with steel sleeper, to investigate alternatives that can reduce bearing force of track and maintenance costs.

After test track was constructed in 2009, maintenance works have performed for 14 months to check the stability of dedicated lane. Consequently, we get to know to keep the bleaching of signs and the crack of road surface in mind for effective maintenance of the dedicated lane hereafter. And dedicated lane with natural lawn is expected to decrease the heat island effect of conventional road if constr