Steel plate for hot forming and manufacturing method of hot press formed steel member

Steel plate for hot forming and manufacturing method of hot press formed steel member

  • CN 105,849,296 A
  • Filed: 12/22/2014
  • Published: 08/10/2016
  • Est. Priority Date: 12/25/2013
  • Status: Active Application
First Claim
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1. a hot forming steel plate, it is characterised in thatIn terms of mass ratio,Containing more than C:

  • 0.15% and less than 0.35%,More than Si;

    1.0% and less than 3.0%,More than Mn;

    1.0% and less than 3.0%,Al;

    more than 0% and less than 0.10%,Ti;

    ([N] ×

    48/14) more than % and less than 0.10%, wherein said [N] represent the N amount in steel plate,More than B;

    5ppm and below 50ppm,P;

    more than 0% and less than 0.015%,S;

    more than 0% and less than 0.010% andN;

    more than 0% and less than 0.010%,Remaining part is ferrum and inevitable impurity,Average oxygen concentration from steel plate most surface to the thickness of slab direction 10 μ

    m degree of depth is more than 0.70 mass %.

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