Hot press formed parts having excellent powdering resistance during hot press forming
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
May 8, 2018
Issued Date -
N/A
app pub date -
Aug 29, 2016
filing date -
Dec 24, 2014
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Provided is a hot press-formed (HPF) member with excellent powdering resistance at the time of press forming. The HPF member includes a hot-dip coating layer containing Al on a surface of a base steel sheet. The base steel sheet includes, based on wt %, 0.18-0.25% of C, 0.1-1.0% of Si, 0.9-1.5% of Mn, 0.03% or less of P, 0.01% or less of S, 0.01-0.05% of Al, 0.05-0.5% of Cr, 0.01-0.05% of Ti, 0.001-0.005% of B, 0.009% or less of N, the balance Fe, and the other impurities. The hot-dip coating layer comprises a soft diffusion layer and a hard alloy layer. The alloy layer has a Tau phase in the range of 10-30%, in terms of area percent.
First Claim
Other Claims data not available
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
- 4 Citation Count
- C23C Class
- 32.86 % this patent is cited more than
- 7 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Nov 8, 2025 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Nov 8, 2029 |
