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US 12,297,517 B2Granted
Steel for hot stamping, hot stamping process and hot stamped component
AssigneeIronovation Materials Technology Co., Ltd.
InventorsHongliang Yi, Dapeng Yang, Xiaochuan Xiong, Guodong Wang
Life of this patent
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Abstract
Steel for hot stamping, a hot stamping process and a hot stamped component, in which the steel for hot stamping contains in weight percentage C: 0.2-0.4%, Si: 0-0.8%, Al: 0-1.0%, B: 0-0.005%, Mn: 0.5-3.0%, Mo: 0-1%, Cr: 0-2%, Ni: 0-5%, V: 0-0.4%, Nb: 0-0.2%, Ti: ≤0.01%, and impurity elements such as P, S, N unavoidable during smelting. The relationship 29*Mo+16*Mn+14*Cr+5.3*Ni≥30% is satisfied when B≤0.0005%, and 0.4-1.0% Al is contained when 0.0005%<B≤0.005%.
Claims7
A hot stamped component, wherein the hot stamped component in weight percentage contains C:
- 0.3-0.4%, Si:
- 0-0.8%, Al:
- 0.6%-0.9%, B:
- 0.0005%<B≤0.005%, Mn:
- 0.5-3.0%, Mo:
- 0-1%, Cr:
- 0-2%, Ni:
- 0-5%, V:
- 0-0.4%, Nb:
- 0-0.2%, Ti:
- <0.01%, N:
- 0.0045%≤N<0.01%, with the balance being Fe and impurity elements unavoidable during smelting,
- wherein the hot stamped component contains no TiN particles with particle size≥1 μm,
- wherein the hot stamped component has a yield strength of 1200-1800 MPa, a tensile strength of 1500-2150 MPa, an elongation of 7-10%, and an impact toughness of ≥45J·cm−2 at −40° C. under confidence of 99.5%, and
- wherein the hot stamped component contains dispersed AlN inclusions.
12 more elements
Dependencies are inferred from the claim text.