Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)

The Korean Society of Automotive Engineers (한국자동차공학회)
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Development of Chassis Parts Using High Toughness Micro-alloyed Steel

고인성 비조질강 샤시부품 개발

  • Lee, Si-Yup (Metallic Materials Research Team, Hyundai-motor Company) ;
  • Kim, Hyuk (Metallic Materials Research Team, Hyundai-motor Company)
  • 이시엽 (현대자동차 금속재료연구팀) ;
  • 김혁 (현대자동차 금속재료연구팀)
  • Received : 2010.06.04
  • Accepted : 2011.11.04
  • Published : 2012.05.01
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Abstract

This paper developed the chassis part as micro-alloyed steel with high toughness. The performance of micro-alloy steels are superior to similar heat treated steels. The strengthening effects of vanadium make micro-alloyed steels particularly suited for high-strength-steel applications. The disadvantages are that ductility and toughness are not as good as quenched and tempered (Q&T) steels. Precipitation hardening increases strength but may contribute to brittleness. Toughness can be improved by reducing carbon content and titanium additions. dispersed titanium nitrides (TiN) formed by titanium additions effectively prevents grain coarsening. Grain refinement increases strength but also improves toughness. For the chassis parts using high toughness micro-alloy steel, it had proven superior to a plain steel forging by static strength test and endurance test.

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References

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