KR950018537A

KR950018537A - Manufacturing method of high tensile steel wire with excellent ductility

Info

Publication number: KR950018537A
Application number: KR1019930029963A
Authority: KR
Inventors: 최종교; 이준범; 최점용
Original assignee: 조말수; 포항종합제철 주식회사; 백덕현; 재단법인산업과학기술연구소
Priority date: 1993-12-27
Filing date: 1993-12-27
Publication date: 1995-07-22

Abstract

본 발명은 자동차 타이어, 산업용 각종벨트류, 고무호스등의 보강재로 사용되는 극세고강도강선을 제조하는 방법에 관한 것으로써, 파텐팅 열처리 사용하는 냉각매체의 종류에 관계없이 선의 변태온도를 일정범위내에서 엄격히 제어함으로써, 선의 인장강도가 350kg/㎟이상이 되는 연성이 우수한 초고장력 강선을 제조하고자 하는데, 그 목적이 있다.The present invention relates to a method for manufacturing ultra-high strength steel wires used as reinforcement materials for automobile tires, industrial belts, rubber hoses, etc., and the transformation temperature of the wires within a certain range irrespective of the type of cooling medium used for parting heat treatment. By strict control, it is intended to produce an ultra-high tensile steel wire having excellent ductility such that the tensile strength of the wire is 350 kg / mm 2 or more.

본 발명은 고장력 강선을 제조하는 방법에 있어서, 중량%로, 탄소(C) ; 0.90-1.20%, 실리콘(Si) : 0.1-1.0%, 망간(Mn) : 0.1-0.5%, 크롬(Cr) : 0.5%이하, 알미늄(Al) : 0.002% 이하, 인(P) : 0.015%이하, 황(S) : 0.010%이하, 질소(N) : 50ppm 이하, 잔부 Fe 및 기타 불가피한 불순물로 이루어진 과공석 탄소강선을 펄라이트 변태분율의 90% 이상이 580-610℃의 온도영역에서 일어나도록 파텐팅한 후, 단면감소율 96% 이상으로 냉간신선 가공하는 연성이 우수한 초고장력강선의 제조방법을 그 요지로 한다.The present invention provides a method for producing a high tensile steel wire, in weight%, carbon (C); 0.90-1.20%, Silicon (Si): 0.1-1.0%, Manganese (Mn): 0.1-0.5%, Chromium (Cr): 0.5% or less, Aluminum (Al): 0.002% or less, Phosphorus (P): 0.015% Below, sulfur (S): 0.010% or less, nitrogen (N): 50 ppm or less, and the vacant carbon steel wire composed of balance Fe and other unavoidable impurities so that at least 90% of the perlite transformation rate occurs in the temperature range of 580-610 ° C. After the parting, the method for producing an ultra-high tensile strength steel having excellent ductility for cold drawing at a cross sectional reduction rate of 96% or more is made.

Description

Manufacturing method of high tensile steel wire with excellent ductility

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

제1도는 5.5mmΦ과 과공석탄소강선재를 이용하여 초고장력 극세강선을 제조하는 공정을 개략적으로 나타내는 공정개략도.1 is a process schematic diagram schematically showing a process for manufacturing ultra high-strength ultrafine steel wire using 5.5 mm Φ and perforated carbon steel wire.

제2도는 590℃의 납조를 이용하여 파텐팅 열처리할때 강종별 시간에 따른 소재의 온도변화를 나타내는 그래프.2 is a graph showing the temperature change of the material according to the steel type time when parting heat treatment using a lead bath of 590 ℃.

Claims

In the method for producing a high tensile steel wire, in weight%, carbon (C); 0.90-1.20%, Silicon (Si): 0.1-1.0%, Manganese (Mn): 0.1-0.5%, Chromium (Cr): 0.5% or less, Aluminum (Al): 0.002% or less, Phosphorus (P): 0.015% Below, sulfur (S): 0.010% or less, nitrogen (N): 50 ppm or less, and the vacant carbon steel wire composed of balance Fe and other unavoidable impurities so that at least 90% of the perlite transformation rate occurs in the temperature range of 580-610 ° C. After parting, cold drawing is performed at 96% or more in cross-sectional reduction rate.

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