STEEL SHEET FOR HOT PRESSING AND METHOD FOR PRODUCING THE SAME, AND HOT-PRESSED MEMBER AND METHOD FOR PRODUCING THE SAME
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United States of America
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Issued Date -
Nov 14, 2024
app pub date -
Sep 9, 2022
filing date -
Sep 9, 2022
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Abstract
A steel sheet for hot pressing, a method for producing the steel sheet, a hot-pressed member, and a method for producing the hot-pressed member are disclosed. The steel sheet for hot pressing contains specific components, wherein ferrite constitutes 30% or more and 90% or less by area, pearlite constitutes 10% or more and 70% or less by area, and a remaining microstructure constitutes 5% or less by area, the ferrite has an average aspect ratio in the range of 2.0 or more and 12.0 or less, and the ferrite has an average minor axis length of 5.0 μm or less, the steel sheet contains 500/μm3 or more and 6000/μm3 or less of Ti—Nb complex precipitates with a grain size of 3 nm or more and 50 nm or less, and the steel sheet has a dislocation density of 1.0×1015/m2 or more.
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