PL432599A1 - Method of producing a steel bar with a non-circular cross-section and a steel bar with a non-circular cross-section - Google Patents

Method of producing a steel bar with a non-circular cross-section and a steel bar with a non-circular cross-section

Info

Publication number
PL432599A1
PL432599A1 PL432599A PL43259920A PL432599A1 PL 432599 A1 PL432599 A1 PL 432599A1 PL 432599 A PL432599 A PL 432599A PL 43259920 A PL43259920 A PL 43259920A PL 432599 A1 PL432599 A1 PL 432599A1
Authority
PL
Poland
Prior art keywords
circular cross
group
section
steel bar
finishing
Prior art date
Application number
PL432599A
Other languages
Polish (pl)
Other versions
PL239419B1 (en
Inventor
Zbigniew KUTYŁA
Original Assignee
Cmc Poland Spółka Z Ograniczoną Odpowiedzialnością
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Cmc Poland Spółka Z Ograniczoną Odpowiedzialnością filed Critical Cmc Poland Spółka Z Ograniczoną Odpowiedzialnością
Priority to PL432599A priority Critical patent/PL239419B1/en
Priority to EP20853573.2A priority patent/EP4090780A1/en
Priority to PCT/IB2020/062318 priority patent/WO2021144643A1/en
Publication of PL432599A1 publication Critical patent/PL432599A1/en
Publication of PL239419B1 publication Critical patent/PL239419B1/en

Links

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
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/005—Modifying the physical properties by deformation combined with, or followed by, heat treatment of ferrous alloys
    • 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
    • C21D6/005—Heat treatment of ferrous alloys containing Mn
    • 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
    • C21D6/02—Hardening by precipitation
    • 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
    • C22C38/001—Ferrous alloys, e.g. steel alloys containing N
    • 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
    • C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
    • 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
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • 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
    • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
    • 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
    • C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
    • 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
    • C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
    • 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
    • C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
    • 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
    • C21D2211/005—Ferrite
    • 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
    • C21D2211/008—Martensite

Abstract

Ujawniony jest sposób wytwarzania pręta stalowego o nieokrągłym przekroju poprzecznym w procesie walcowania na gorąco, w którym wsad w postaci wlewków uzyskiwanych w procesie odlewania ciągłego nagrzewany jest w piecu grzewczym, a następnie kształtowany w procesie walcowania w klatkach walcowniczych, po czym gotowy wyrób poddawany jest chłodzeniu. Etap nagrzewania wsadu w piecu grzewczym prowadzi się do maksymalnej temperatury z przedziału 1080 — 1180°C. Etap kształtowania w klatkach walcowniczych obejmuje walcowanie wstępne, które prowadzi się w grupie klatek wstępnych, oraz walcowanie wykańczające, które prowadzi się grupie klatek wykańczających, gdzie odstęp czasowy pomiędzy ostatnim  gniotem w grupie wstępnej i pierwszym gniotem w grupie wykańczającej wynosi co najmniej 20 sekund, przy czym sumaryczny gniot względny w grupie wykańczającej ustanawia się w przedziale 60 - 80%. Mikrostruktura stali gotowego pręta wytworzonego tym sposobem zawiera drobnoziarnisty ferryt poligonalny i nieregularny ferryt bainityczny o wielkości ziarna w przedziale 4 - 7 μm, o udziale 75 - 85%, oraz wyspy martenzytyczno - bainityczne o rozmiarach poniżej 10 μm, o udziale 15 - 25%.Disclosed is a method of producing a steel bar with a non-circular cross section in a hot rolling process, in which the charge in the form of ingots obtained in the continuous casting process is heated in a heating furnace and then shaped in the rolling process in rolling stands, after which the finished product is cooled. . The step of heating the charge in the reheating furnace is carried out to a maximum temperature in the range of 1080-1180 ° C. The shaping step in the rolling stands includes roughing, which is performed in the rough group, and finishing, which is performed in the finishing group, where the time interval between the last crush in the rough group and the first crush in the finishing group is at least 20 seconds, with whereby the total relative crush in the finishing group is set in the range of 60 - 80%. The microstructure of the steel of the finished rod produced in this way contains fine-grained polygonal ferrite and irregular bainitic ferrite with a grain size in the range of 4 - 7 μm, with a share of 75 - 85%, and martensitic-bainitic islands with sizes below 10 μm, with a share of 15 - 25%.

PL432599A 2020-01-17 2020-01-17 Method of producing a steel bar with a non-circular cross-section and a steel bar with a non-circular cross-section PL239419B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
PL432599A PL239419B1 (en) 2020-01-17 2020-01-17 Method of producing a steel bar with a non-circular cross-section and a steel bar with a non-circular cross-section
EP20853573.2A EP4090780A1 (en) 2020-01-17 2020-12-22 Method of producing steel bar of non-round cross-section and steel bar of non-round cross section
PCT/IB2020/062318 WO2021144643A1 (en) 2020-01-17 2020-12-22 Method of producing steel bar of non-round cross-section and steel bar of non-round cross section

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PL432599A PL239419B1 (en) 2020-01-17 2020-01-17 Method of producing a steel bar with a non-circular cross-section and a steel bar with a non-circular cross-section

Publications (2)

Publication Number Publication Date
PL432599A1 true PL432599A1 (en) 2021-07-19
PL239419B1 PL239419B1 (en) 2021-11-29

Family

ID=74626032

Family Applications (1)

Application Number Title Priority Date Filing Date
PL432599A PL239419B1 (en) 2020-01-17 2020-01-17 Method of producing a steel bar with a non-circular cross-section and a steel bar with a non-circular cross-section

Country Status (3)

Country Link
EP (1) EP4090780A1 (en)
PL (1) PL239419B1 (en)
WO (1) WO2021144643A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115608780B (en) * 2022-12-19 2023-03-21 太原科技大学 Method for controlling copper-containing stainless steel cracks and stainless steel

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5545270A (en) * 1994-12-06 1996-08-13 Exxon Research And Engineering Company Method of producing high strength dual phase steel plate with superior toughness and weldability
EP0757113B1 (en) * 1995-02-03 2000-04-12 Nippon Steel Corporation High-strength line-pipe steel having low yield ratio and excellent low-temperature toughness
RU2549023C1 (en) * 2013-12-06 2015-04-20 Акционерное общество "Выксунский металлургический завод" Method of production of rolled plates with strength class k65, x80, l555 to manufacture arc welded pipes of main pipelines
CA2944863A1 (en) * 2014-04-23 2015-10-29 Nippon Steel & Sumitomo Metal Corporation Hot-rolled steel sheet for tailored rolled blank, tailored rolled blank, and methods for producing these

Also Published As

Publication number Publication date
PL239419B1 (en) 2021-11-29
EP4090780A1 (en) 2022-11-23
WO2021144643A1 (en) 2021-07-22

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