Korean Journal of Metals and Materials (대한금속재료학회지)

The Korean Institute of Metals and Materials (대한금속재료학회)
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Effect of Aluminum and Solute N on the Strain Aging of Extremely Low-Carbon Automotive Steel Strengthened with Cu sulfide

초극저탄소 Cu강화형 자동차용 강판 변형시효에 미치는 Aluminum 및 고용질소의 영향

  • Received : 2008.10.08
  • Published : 2009.02.25
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Abstract

The precipitation behavior of solute carbon and nitrogen strongly affects the mechanical properties of low-carbon automotive panel. In the present study, the effects of aluminum and solute nitrogen on the bake hardenability and strain aging of extremely low-carbon steel with carbon content below 15 ppm has been investigated. The ferrite grain size and distribution of precipitates were varied with the amount of aluminum content of 0.003 to ~ 0.100 wt% in a constant solute carbon and nitrogen. With increasing the aluminum content, the ferrite grain size is increased and strain aging is delayed. The strain aging is also delayed by increasing the annealing temperature, although the ferrite grain size is not much changed.

Keywords

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