US 12,454,737 B2
Method of forming a hot stamped coated steel product
Pascal Drillet, Rozerieulles (FR); Dominique Spehner, Balan (FR); and Ronald Kefferstein, Saint Mitre les Ramparts (FR)
Assigned to ArcelorMittal, Luxembourg (LU)
Filed by ArcelorMittal, Luxembourg (LU)
Filed on May 22, 2024, as Appl. No. 18/670,943.
Application 17/479,050 is a division of application No. 17/319,306, filed on May 13, 2021, granted, now 11,326,227, issued on May 10, 2022.
Application 13/621,015 is a division of application No. 12/447,777, granted, now 8,307,680, issued on Nov. 13, 2012, previously published as PCT/IB2006/004019, filed on Oct. 30, 2006.
Application 18/670,943 is a continuation of application No. 18/537,158, filed on Dec. 12, 2023, granted, now 12,012,640.
Application 18/537,158 is a continuation of application No. 17/479,050, filed on Sep. 20, 2021, granted, now 11,939,643, issued on Mar. 26, 2024.
Application 17/319,306 is a continuation of application No. 16/413,825, filed on May 16, 2019, granted, now 11,041,226, issued on Jun. 22, 2021.
Application 16/413,825 is a continuation of application No. 15/606,770, filed on May 26, 2017, granted, now 10,550,447, issued on Feb. 4, 2020.
Application 15/606,770 is a continuation of application No. 13/621,015, filed on Sep. 15, 2012, granted, now 9,708,683, issued on Jul. 18, 2017.
Prior Publication US 2024/0309484 A1, Sep. 19, 2024
Int. Cl. B32B 15/01 (2006.01); C21D 9/46 (2006.01); C23C 2/12 (2006.01); C23C 2/26 (2006.01); C23C 2/40 (2006.01)
CPC C21D 9/46 (2013.01) [B32B 15/012 (2013.01); C23C 2/12 (2013.01); C23C 2/26 (2013.01); C23C 2/40 (2013.01); Y10T 428/12389 (2015.01); Y10T 428/12396 (2015.01); Y10T 428/12757 (2015.01)] 28 Claims
OG exemplary drawing
 
1. A hot stamped coated steel product, the hot stamped coated steel product comprising:
a base steel; and
a coating having a thickness of including, proceeding from the base steel outwards:
(a) an interdiffusion layer,
(b) an intermediate layer,
(c) an intermetallic layer, and
(d) a superficial layer,
the base steel having a composition comprising:
0.15%<carbon<0.5%;
0.5%<manganese<3%;
0.1%<silicon<0.5%;
0.01%<chromium<1%;
0%<titanium<0.2%;
aluminum<0.1%;
phosphorus<0.1%;
0 ppm<sulfur<=20 ppm;
0.0005%<boron<0.08%;
nitrogen;
a weight ratio of titanium content with respect to the nitrogen content being in excess of 3.42;
a remainder being iron and impurities inherent in processing.