Patent ID: 11945503
Assignee: ARCELORMITTAL
Field: Machine tools (Mechanical engineering)
Classification: CPC B  C | IPC B  C

Claim 10:
11. The method as recited in claim 1, wherein, for at least one of the precoated sheets, the steel of the steel substrate comprises, by weight:
0.24%≤C≤0.38%
0.40%≤Mn≤3%
0.10%≤Si≤0.70%
0.015%≤Al≤0.070%
0%≤Cr≤2%
0.25%≤Ni≤2%
0.015%≤Ti≤0.10%
0%≤Nb≤0.060%
0.0005%≤B≤0.0040%
0.003%≤N≤0.010%
0.0001%≤S≤0.005%
0.0001%≤P≤0.025%
wherein the titanium and nitrogen contents satisfy the following relationship:

Ti/N>3.42.

and the carbon, manganese, chromium and silicon contents satisfy the following relationship:, 2.6
        ⁢
        C
      
      +
      
        Mn
        5.3
      
      +
      
        Cr
        13
      
      +
      
        Si
        15
      
    
    ≥
    
      1.1
      ⁢
      %
    
  
  ,

the steel optionally comprising one or more of the following elements:
0.05%≤Mo≤0.65%
0.001%≤W≤0.30%%
0.0005%≤Ca≤0.005%
a rest being iron and impurities inevitably resulting from manufacturing.