KR970043165A - Method for manufacturing raw steel wire rod for drawing - Google Patents

Method for manufacturing raw steel wire rod for drawing Download PDF

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Publication number
KR970043165A
KR970043165A KR1019950051875A KR19950051875A KR970043165A KR 970043165 A KR970043165 A KR 970043165A KR 1019950051875 A KR1019950051875 A KR 1019950051875A KR 19950051875 A KR19950051875 A KR 19950051875A KR 970043165 A KR970043165 A KR 970043165A
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KR
South Korea
Prior art keywords
cooling rate
cooling
wire rod
start temperature
steel wire
Prior art date
Application number
KR1019950051875A
Other languages
Korean (ko)
Other versions
KR100256346B1 (en
Inventor
박경태
박수동
Original Assignee
김종진
포항종합제철 주식회사
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Application filed by 김종진, 포항종합제철 주식회사 filed Critical 김종진
Priority to KR1019950051875A priority Critical patent/KR100256346B1/en
Publication of KR970043165A publication Critical patent/KR970043165A/en
Application granted granted Critical
Publication of KR100256346B1 publication Critical patent/KR100256346B1/en

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D11/00—Process control or regulation for heat treatments
    • C21D11/005—Process control or regulation for heat treatments for cooling
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/008—Heat treatment of ferrous alloys containing Si
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/06—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
    • C21D8/08—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires for concrete reinforcement
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/525—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length for wire, for rods
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/009—Pearlite

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Heat Treatment Of Steel (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)

Abstract

본 발명은 고강도가 요구되어지는 특수교량케이블, 콘크리트 보강용 강선 등에 사용되어지는 Si함유 신선용 과공석강 선재의 제조방법에 관한 것으로서, 고 Si함유 과공석강 선재의 합금성분계를 제어하고 이를 연속제어 냉각법을 적용하여 제조시 선재압연 후 냉각개시 온도로부터 필라이트 변태개시온도까지 냉각속도를 제어하여 냉각시 신선에 안영향을 미치는 초석 세멘타이트 및 마르텐사이트 발생을 억제하므로서, 신선에 적합한 미세 조직을 갖는 Si함유 과공석강 선재를 제조하는 방법을 제공하고자 하는데 그 목적이 있다. 상기한 목적을 달성 하기 위한 본 발명은 과공석 선재의 제조방법에 있어서, 중량비로 C:0.8-1.2%, Si:0.2-2.0%, Mn:0.6-0.9%, S:0.01%이하, P:0.01이하, 잔부 Fe 및 불가피한 불순무로 조성되는 강을 선재로 열간압연한 후 850-950℃의 냉각 개시온도 범위에서부터 펄라이트 변태개시온도까지 하기식(1)의 냉각속도 이상 및 하기식(2)의 냉각속도 이하의 냉각 속도범위로 냉각하는 것을 포함하여 이루어지는 신선용 과공석 선재의 제조방법에 관한 것이다.The present invention relates to a method for manufacturing Si-containing super masonry steel wire used for special bridge cable, concrete reinforcing steel wire, etc., which requires high strength. By controlling the cooling rate from the cooling start temperature to the fillite transformation start temperature after wire rod rolling during manufacture, it is possible to suppress the formation of cementite cementite and martensite, which adversely affects the freshness during cooling, and thus has a microstructure suitable for drawing. It is an object of the present invention to provide a method for producing a containing roughened steel wire. In order to achieve the above object, the present invention provides a method for producing a masonry wire rod, wherein the weight ratio is C: 0.8-1.2%, Si: 0.2-2.0%, Mn: 0.6-0.9%, S: 0.01% or less, and P: 0.01 or less, hot rolled steel composed of balance Fe and inevitable impurity, followed by the cooling rate of the following formula (1) from the cooling start temperature range of 850-950 ° C. to the pearlite transformation start temperature and the following formula (2) The present invention relates to a method for manufacturing a super-vacuum wire rod for wire drawing comprising cooling in a cooling rate range below a cooling rate.

% C = 0.125 log(냉각속도) + 0.95.........(1)% C = 0.125 log (cooling rate) + 0.95 ......... (1)

% Si= -2.188 log(냉각속도) + 2.89.......(2)% Si = -2.188 log (cooling rate) + 2.89 ....... (2)

Description

신선용 과공석 선재의 제조방법Method for manufacturing raw steel wire rod for drawing

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

제1도는 0.2% Si를 함유한 과공석강에 있어서 C함량과 냉각속도에 따른 미세조직 구역도,1 is a microstructure zone diagram according to the C content and cooling rate in a masonry steel containing 0.2% Si,

제2도는 0.83% C를 함유한 과공석강에 있어서 Si함량과 냉각속도에 따른 미세조직 구역도,2 is a microstructure zone diagram according to the Si content and the cooling rate in the super masonry steel containing 0.83% C,

제3도는 0.94% C를 함유한 과공석강에 있어서 Si함량과 냉각속도에 따른 미세조직 구역도.3 is a microstructure section diagram of Si content and cooling rate in super masonry steel containing 0.94% C.

Claims (1)

과공석 선재의 제조방법에 있어서, 중량비로 C:0.8-1.2%, Si:0.2-2.0%, Mn:0.6-0.9%, S:0.01%이하, P:0.01이하, 잔부:Fe 및 불가피한 불순물로 조성되는 강을 선재로 열간압연한 후 850-950℃의 냉각 개시온도 범위에서부터 펄라이트 변태개시온도까지 하기식(1)의 냉각속도 이상 및 하기식(2)의 냉각속도 이하의 냉각 속도범위로 냉각하는 것을 포함하여 이루어지는 신선용 과공석 선재의 제조방법In the method for producing a vaccinated wire rod, C: 0.8-1.2%, Si: 0.2-2.0%, Mn: 0.6-0.9%, S: 0.01% or less, P: 0.01 or less, balance: Fe and inevitable impurities After hot-rolling the steel to be formed by wire rod, it is cooled to the cooling rate range below the cooling rate of formula (1) and below the cooling rate of formula (2) from the cooling start temperature range of 850-950 ℃ to the pearlite transformation start temperature. Manufacturing method of raw masonry wire rod for drawing including % C = 0.125 log(냉각속도) + 0.95.........(1)% C = 0.125 log (cooling rate) + 0.95 ......... (1) % Si = -2.188 log(냉각속도) + 2.89.......(2)% Si = -2.188 log (cooling rate) + 2.89 ....... (2)
KR1019950051875A 1995-12-19 1995-12-19 The manufacturing method for wire drawing hypereutectoid wire rod KR100256346B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019950051875A KR100256346B1 (en) 1995-12-19 1995-12-19 The manufacturing method for wire drawing hypereutectoid wire rod

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019950051875A KR100256346B1 (en) 1995-12-19 1995-12-19 The manufacturing method for wire drawing hypereutectoid wire rod

Publications (2)

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KR970043165A true KR970043165A (en) 1997-07-26
KR100256346B1 KR100256346B1 (en) 2000-05-15

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100347581B1 (en) * 1997-12-27 2002-10-25 주식회사 포스코 Method for preparing wire rod with high stiffness

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100347575B1 (en) * 1997-12-27 2002-10-25 주식회사 포스코 Step cooling method of high carbon wire rod for inhibiting generation of martensite

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2544867B2 (en) * 1992-04-21 1996-10-16 新日本製鐵株式会社 Manufacturing method of hyper-eutectoid steel wire

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100347581B1 (en) * 1997-12-27 2002-10-25 주식회사 포스코 Method for preparing wire rod with high stiffness

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