KR940014873A

KR940014873A - Austenitic free-cutting stainless steel with excellent hot workability

Info

Publication number: KR940014873A
Application number: KR1019920024973A
Authority: KR
Inventors: 배철민; 박수동
Original assignee: 박득표; 포항종합제철주식회사; 백덕현; 재단법인산업과학기술연구소
Priority date: 1992-12-22
Filing date: 1992-12-22
Publication date: 1994-07-19
Also published as: KR950004937B1

Abstract

본 발명은 절삭가공에 의해 가공되는 마이크로샤프트등의 소재로 이용되는 오스테나이트계 쾌삭스텐레스강에 관한 것으로서, 통상의 TST303 스텐레스강을 기본으로 하고, Mn/S 비, B의 함량및{0}의 함량을 적절히 제어하므로서, 열간가공성이 우수하고 MnS 계 개재물의 형상을 구형화하여 절삭성을 향상시키고자 하는데, 그 목적이 있다.The present invention relates to an austenitic free-cutting stainless steel used for materials such as microshafts processed by cutting, and is based on conventional TST303 stainless steel, and has a Mn / S ratio, a content of B and a content of {0}. By controlling the content appropriately, it is intended to improve the machinability by making the shape of the MnS-based inclusions excellent in hot workability and spherical.

본 발명은, 중량%로 C:0.15%이하, Si:1.0%이하, Cr:17.0~19.0%, Ni:8.0~9.0%, Mo:0.6%이하, Mn:1.5~2.0%, S:0.15%이상, B:0.001~0.005%, {0}:0.007~0.013%, Mn/S비:6.0이상, 잔부 Fe 및 기타불가피한 불순물로 조성되는 열간가공성이 우수한 오스테나이트계 쾌삭 스텐레스강을 그 요지로 한다.In the present invention, C: 0.15% or less, Si: 1.0% or less, Cr: 17.0 to 19.0%, Ni: 8.0 to 9.0%, Mo: 0.6% or less, Mn: 1.5 to 2.0%, S: 0.15% by weight. Above, B: 0.001 ~ 0.005%, {0}: 0.007 ~ 0.013%, Mn / S ratio: 6.0 or more, the austenitic free-cutting stainless steel excellent in the hot workability which consists of remainder Fe and other unavoidable impurities is made into the summary. .

Description

Austenitic free-cutting stainless steel with excellent hot workability

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

제1도는 Mn/S 비에 따른 열간가공성(단면감소율)의 변화를 나타내는 그래프,1 is a graph showing the change in hot workability (section reduction rate) according to Mn / S ratio,

제2도는 B첨가에 따른 열간가공성(단면감소율)의 변화를 나타내는 그래프,2 is a graph showing the change in hot workability (section reduction rate) according to the addition of B;

제3도는 〔0〕량의 변화에 따른 개재물형상변화를 나타내는 그래프.3 is a graph showing a change in inclusion shape according to a change in the amount [0].

Claims

By weight% C: 0.15% or less, Si: 1.0% or less, Cr: 17.0-19.0%, Ni: 8.0-9.0%, Mo: 0.6% or less, Mn: 1.5-2.0%, S: 0.15% or more, B: Austenitic free-cutting stainless steel with excellent hot workability, characterized by being 0.001% to 0.005%, {0}: 0.007% to 0.013%, Mn / S ratio: 6.0 or more, balance Fe and other unavoidable impurities.

※ Note: This is to be disclosed based on the first application.