FERRITIC HEAT-RESISTANT STEEL - NIPPON STEEL CORP

Title:

FERRITIC HEAT-RESISTANT STEEL

Document Type and Number:

WIPO Patent Application WO/2020/189789

Kind Code:

A1

Abstract:

This ferritic heat-resistant steel comprises: 0.06-0.11 mass mass% of C; 0.15-0.35 mass% of Si; 0.35-0.65 mass% of Mn; 0-0.02 mass% of P; 0-0.003 mass% of S; 0.005-0.25 mass% of Ni; 0.005-0.25 mass% of Cu; 2.7-3.3 mass% of Co; 8.3-9.7 mass% of Cr; 2.5-3.5 mass% of W; 0.15-0.25 mass% of V; 0.03-0.08 mass% of Nb; 0.002-0.04 mass% of Ta; 0.01-0.06 mass% of Nd; 0.006-0.016 mass% of B; 0.005-0.015 mass% of N; 0-0.02 mass% of Al; and 0-0.02 mass% of O, with the balance being Fe and impurities, wherein the W amount, [%W]ER, analyzed as an electrolytic extraction residue satisfies -10×[%B]+0.26≤ [%W]ER≤10×[%B]+0.54.

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Inventors:

HIRATA HIROYUKI (JP)
YOSHIZAWA MITSURU (JP)
HIGUCHI JUNICHI (JP)
TANAKA KATSUKI (JP)

Application Number:

PCT/JP2020/012528

Publication Date:

September 24, 2020

Filing Date:

March 19, 2020

Export Citation:

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Assignee:

NIPPON STEEL CORP (JP)

International Classes:

C22C38/00; C22C38/54; C21D6/00

Domestic Patent References:

WO2017104815A1

2017-06-22

Foreign References:

JP2016216815A	2016-12-22
JP2002363709A	2002-12-18
JP2002241903A	2002-08-28
JP2019075661A	2019-05-16
JP2019051751A	2019-04-04
JP2019051752A	2019-04-04

Other References: