High strength and ductility nanostructured bainitic steel for the crashproof parts of body of a motor car

High strength and ductility nanostructured bainitic steel for the crashproof parts of body of a motor car

  • CN 106,119,704 A
  • Filed: 06/23/2016
  • Published: 11/16/2016
  • Est. Priority Date: 06/23/2016
  • Status: Active Application
First Claim
Patent Images

1. the high strength and ductility nanostructured bainitic steel for the crashproof parts of body of a motor car, it is characterised in that described high-strength mouldChemical composition and the content thereof of long-pending nanostructured bainitic steel is:

  • C be 0.55 ~ 0.65wt%, Si be that 0.30 ~ 1.50wt%, Mn are0.50 ~ 2.00wt%, Ni be 1.50 ~ 2.00wt%, Cr be 0.50 ~ 1.20wt%, Cu be 0.30 ~ 1.00wt%, Mo be 0.10 ~0.50wt%, Nb be 0.00 ~ 0.10wt%, V be 0.00 ~ 0.10wt%, Ti be 0.00 ~ 0.10wt%, P <

    0.015wt%, S <

    0.010wt%, remaining is Fe and inevitable impurity;

    The preparation method of described high strength and ductility nanostructured bainitic steel is;

    will meet the molten iron of above-mentioned chemical composition and content thereofAfter steel-making and refine, carry out molding or continuous casting;

    By strand soaking 3.0 ~ 5.0h under the conditions of 1100 ~ 1250 DEG C, it is rolled into plateMaterial, cools to room temperature with the furnace;

    Again by described sheet material austenitizing 0.5 ~ 4.0h under the conditions of 850 ~ 1100 DEG C, then 250 ~Be incubated 0.3 ~ 6.0h under the conditions of 400 DEG C and salt bath, under the conditions of 200 ~ 300 DEG C and salt bath, be incubated 4 ~ 35h, at 150 ~ 250 DEG C andBeing incubated 30 ~ 80h under the conditions of salt bath, last air cooling is to room temperature.

View all claims
    ×
    ×

    Thank you for your feedback

    ×
    ×