KR920702434A

KR920702434A - Ferritic series heat resistant stainless steel with excellent low temperature toughness, weldability and heat resistance

Info

Publication number: KR920702434A
Application number: KR1019910701642A
Authority: KR
Inventors: 요시히로 우에마쓰; 나오또 히라마쓰; 사다유기 나까무라
Original assignee: 가히 미끼; 닛싱 세이고오 가부시기가이샤
Priority date: 1990-03-24
Filing date: 1991-03-13
Publication date: 1992-09-04
Also published as: EP0478790A4; JPH03274245A; WO1991014796A1; EP0478790A1; KR0180206B1; DE69110816D1; CA2056362A1; JP2696584B2; EP0478790B1; DE69110816T2; CA2056362C

Abstract

내용 없음No content

Description

Ferritic series heat resistant stainless steel with excellent low temperature toughness, weldability and heat resistance

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제1도는 본 발명을 성취함에 이른 고온 인장시험결과의 예를 나타낸 Mo량과 고온인장강도와의 관계이다, 제2도는 고온산화시험결과의 예를 나타낸 Mn량과 스케일 박리량의 관계도이다, 제3도는 용접 고온 균렬시험결과의 예를 나타낸 Mn/s과 임계변형량과의 관계도이다.1 is a relationship between the amount of Mo and the high temperature tensile strength showing an example of the high temperature tensile test results to achieve the present invention, Figure 2 is a relationship between the amount of Mn and the scale peeling amount showing an example of the high temperature oxidation test results, 3 is a relationship between Mn / s and critical strain showing an example of the welding hot balance test result.

Claims

In weight%, C: 0.03% or less, Si: 0.1-0.8%, Mn: 0.6-2.0%, S; 0.006% or less, Ni: 4% or less, Cr: 17.0-25.0%, Nb: 0.2-0.8% , Mo: 1.0-4.5%, Cu: 0.1-2.5%, N: 0.03% or less, provided that the ratio of Mn% / S% is 200 or more, [Nb] = Nb% -8 (C%) [Nb] contains these elements such that [Nb] is 0.2 or more and Ni% + Cu% is 4 or less, and the remaining part is composed of Fe and unavoidable impurities. Low-temperature ferritic stainless steel with excellent low temperature toughness, weldability and heat resistance.

The ferritic series heat resistant stainless steel according to claim 1, wherein Mo is 2.5% to 4.5%.

In weight%, C: 0.03% or less, Si: 0.1-0.8%, Mn: 0.6-2.0%, S; 0.006% or less, Ni: 4% or less, Cr: 17.0-25.0%, Nb: 0.2-0.8% , Mo: 1.0-4.5%, Cu: 0.1-2.5%, N: 0.03% or less, and A1: 0.5% or less, Ti: 0.6% or less, V: 0.5% or less, Zr: 1.0% or less, W : 1.5% or less, B: 0.01% or less, REM: 0.1% or less One or two types or more are contained, and in the above-mentioned range, the ratio of Mn% / S% is 200 or more, [Nb] = Nb%- According to the formula of 8 (C% + N%), these elements were contained so as to satisfy the relationship of [Nb] of 0.2 or more and Ni% + Cu% of 4 or less, with the remainder being Fe and unavoidable impurities in manufacturing. Low temperature ferritic stainless steel for excellent low temperature toughness, weldability and heat resistance.

4. The ferritic heat resistant stainless steel as claimed in claim 3, wherein Mo is greater than 2.5% to 4.5% in terms of low temperature toughness, weldability, and heat resistance.

The ferritic series for heat resistance excellent in low temperature toughness, weldability and heat resistance according to claim 1, 2, 3, and 4, wherein the stainless steel material is used to form an exhaust gas pipe member between the engine and the exhaust gas purifier. Stainless steel.

※ Note: The disclosure is based on the initial application.