CN109290370A - A kind of milling method improving think gauge bridge steel Charpy impact performance - Google Patents

A kind of milling method improving think gauge bridge steel Charpy impact performance Download PDF

Info

Publication number
CN109290370A
CN109290370A CN201811173714.7A CN201811173714A CN109290370A CN 109290370 A CN109290370 A CN 109290370A CN 201811173714 A CN201811173714 A CN 201811173714A CN 109290370 A CN109290370 A CN 109290370A
Authority
CN
China
Prior art keywords
temperature
charpy impact
impact performance
think gauge
continue
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
CN201811173714.7A
Other languages
Chinese (zh)
Inventor
段江涛
张坤
韩旭
罗军
丛津功
王若钢
李新玲
于金洲
张紫茵
李黎明
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Angang Steel Co Ltd
Original Assignee
Angang Steel Co Ltd
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 Angang Steel Co Ltd filed Critical Angang Steel Co Ltd
Priority to CN201811173714.7A priority Critical patent/CN109290370A/en
Publication of CN109290370A publication Critical patent/CN109290370A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/38—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling sheets of limited length, e.g. folded sheets, superimposed sheets, pack rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
    • 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
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • C21D8/0226—Hot rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/38—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling sheets of limited length, e.g. folded sheets, superimposed sheets, pack rolling
    • B21B2001/386—Plates
    • 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
    • C21D2211/001—Austenite

Landscapes

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

Abstract

A kind of milling method improving think gauge bridge steel Charpy impact performance carries out three sections of temperature-controlled rollings to steel plate after broadening rolling, to improve austenite recrystallization tissue change, improves steel plate Charpy impact performance.Compared with prior art, the beneficial effects of the present invention are: a kind of milling method for improving think gauge bridge steel Charpy impact performance, to improve the Charpy impact performance number of think gauge high intensity bridge steel plate, meet iron target Charpy impact performance number requirement (>=120J), the control process ability of charp impact value performance indicator is improved, provides properties percent of pass guarantee to produce in enormous quantities.

Description

A kind of milling method improving think gauge bridge steel Charpy impact performance
Technical field
The invention belongs to hot rolled strip technology field more particularly to a kind of improve think gauge bridge steel Charpy impact performance Milling method.
Background technique
Before implementing for new edition GB/T 714-2015 structural steel for bridge national standard, the GB/T 714-2008 of execution The Charpy impact performance requirement of Q500qE steel plate is >=47J in structural steel for bridge national standard, using Conventional cryogenic controlled rolling Method, which carries out production, to be met the requirements, but after the implementation of new edition GB/T 714-2015 structural steel for bridge national standard, the summer It is promoted to >=120J than impact performance requirement, the method for Conventional cryogenic controlled rolling is difficult to meet.
Summary of the invention
The present invention provides a kind of milling methods for improving think gauge bridge steel Charpy impact performance, to improve think gauge height The Charpy impact performance number of intensity bridge steel plate meets iron target Charpy impact performance number requirement (>=120J), improves Charpy The control process ability of impact value performance indicator provides properties percent of pass guarantee to produce in enormous quantities.
In order to achieve the above object, the present invention is implemented with the following technical solutions:
A kind of milling method improving think gauge bridge steel Charpy impact performance carries out three to steel plate after broadening rolling Section temperature-controlled rolling improves steel plate Charpy impact performance, specifically includes following step to improve austenite recrystallization tissue change It is rapid:
1) control of steel billet tapping temperature is between 1200 DEG C -1240 DEG C；
2) de-scaling is carried out after steel billet is come out of the stove, the laggard line broadening rolling of de-scaling carries out after completing broadening rolling to temperature；
3) to temperature to 1000 DEG C -1050 DEG C, continue to roll, when being rolled down to 2.7-3 times of finished product thickness, continue To temperature；
4) to temperature to 920 DEG C -950 DEG C, continue to roll, when being rolled down to 1.8-2 times of finished product thickness, continue to Temperature；
5) to temperature to 800 DEG C -830 DEG C, continue to roll, when being rolled down to finished product thickness, control finishing temperature 750 Between DEG C -780 DEG C.
The think gauge bridge steel is thickness >=40mm Q500qE steel plate.
Compared with prior art, the beneficial effects of the present invention are:
A kind of milling method improving think gauge bridge steel Charpy impact performance, to improve think gauge high intensity bridge steel plate The Charpy impact performance number of plate meets iron target Charpy impact performance number requirement (>=120J), improves charp impact value performance and refers to Target control process ability, product impact property qualification rate are 100%, provide properties percent of pass guarantee to produce in enormous quantities.
Specific embodiment
Below with reference to embodiment, specific embodiments of the present invention will be further explained:
A kind of milling method improving think gauge bridge steel Charpy impact performance carries out three to steel plate after broadening rolling Section temperature-controlled rolling improves steel plate Charpy impact performance, specifically includes following step to improve austenite recrystallization tissue change It is rapid:
1) control of steel billet tapping temperature is between 1200 DEG C -1240 DEG C；
2) de-scaling is carried out after steel billet is come out of the stove, the laggard line broadening rolling of de-scaling carries out after completing broadening rolling to temperature；
3) to temperature to 1000 DEG C -1050 DEG C, continue to roll, when being rolled down to 2.7-3 times of finished product thickness, continue To temperature；
4) to temperature to 920 DEG C -950 DEG C, continue to roll, when being rolled down to 1.8-2 times of finished product thickness, continue to Temperature；
5) to temperature to 800 DEG C -830 DEG C, continue to roll, when being rolled down to finished product thickness, control finishing temperature 750 Between DEG C -780 DEG C.
The think gauge bridge steel is thickness >=40mm Q500qE steel plate.
Embodiment 1:Q500q steel, thickness: 44mm.
1) control of steel billet tapping temperature is between 1200-1230 DEG C；
2) de-scaling is carried out after steel billet is come out of the stove, the laggard line broadening rolling of de-scaling carries out after completing broadening rolling to temperature；
3) to temperature to 1000 DEG C -1030 DEG C, continue to roll, when being rolled down to 119mm-132mm thickness, continue to Temperature；
4) to temperature to 920 DEG C -940 DEG C, continue to roll, when being rolled down to 80mm-88mm thickness, continue to temperature；
5) to temperature to 800 DEG C -820 DEG C, continue to roll, be rolled down to finished product thickness 44mm, control finishing temperature 750 Between DEG C -770 DEG C.
As shown in table 1, the present embodiment product impact value result is between 252~321J.
Table 1:
Embodiment 2:Q500q steel, thickness: 56mm.
1) control of steel billet tapping temperature is between 1210-1240 DEG C；
2) de-scaling is carried out after steel billet is come out of the stove, the laggard line broadening rolling of de-scaling carries out after completing broadening rolling to temperature；
3) 1020-1050 DEG C is arrived to temperature, continues to roll, when being rolled down to 152-168mm thickness, continues to temperature；
4) 930-950 DEG C is arrived to temperature, continues to roll, when being rolled down to 101-112mm thickness, continues to temperature；
5) 810-830 DEG C is arrived to temperature, continues to roll, be rolled down to finished product thickness 56mm, control finishing temperature in 760- Between 780 DEG C.
As shown in table 2, the present embodiment product impact value result is between 223~286J.
Table 2:
Lot number The steel trade mark Thickness mm Impact value 1 Impact value 2 Impact value 3
B473914210 Q500qE 56 252 240 245
B473921210 Q500qE 56 286 223 279
B473754220 Q500qE 56 223 230 229

Claims (2)

1. a kind of milling method for improving think gauge bridge steel Charpy impact performance, which is characterized in that after broadening rolling, to steel Plate carries out three sections of temperature-controlled rollings, to improve austenite recrystallization tissue change, improves steel plate Charpy impact performance, specifically includes Following steps:
1) control of steel billet tapping temperature is between 1200 DEG C -1240 DEG C；
2) de-scaling is carried out after steel billet is come out of the stove, the laggard line broadening rolling of de-scaling carries out after completing broadening rolling to temperature；
3) to temperature to 1000 DEG C -1050 DEG C, continue to roll, when being rolled down to 2.7-3 times of finished product thickness, continue to Temperature；
4) to temperature to 920 DEG C -950 DEG C, continue to roll, when being rolled down to 1.8-2 times of finished product thickness, continue to temperature；
5) to temperature to 800 DEG C -830 DEG C, continue to roll, when being rolled down to finished product thickness, control finishing temperature at 750 DEG C -780 Between DEG C.
2. a kind of milling method for improving think gauge bridge steel Charpy impact performance according to claim 1, feature exist In the think gauge bridge steel is thickness >=40mm Q500qE steel plate.
CN201811173714.7A 2018-10-09 2018-10-09 A kind of milling method improving think gauge bridge steel Charpy impact performance Pending CN109290370A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811173714.7A CN109290370A (en) 2018-10-09 2018-10-09 A kind of milling method improving think gauge bridge steel Charpy impact performance

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811173714.7A CN109290370A (en) 2018-10-09 2018-10-09 A kind of milling method improving think gauge bridge steel Charpy impact performance

Publications (1)

Publication Number Publication Date
CN109290370A true CN109290370A (en) 2019-02-01

Family

ID=65161890

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201811173714.7A Pending CN109290370A (en) 2018-10-09 2018-10-09 A kind of milling method improving think gauge bridge steel Charpy impact performance

Country Status (1)

Country Link
CN (1) CN109290370A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110860558A (en) * 2019-10-28 2020-03-06 南京钢铁股份有限公司 Rolling method of ultra-wide and ultra-thick steel containment nuclear power steel

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001131680A (en) * 1999-11-10 2001-05-15 Sumitomo Metal Ind Ltd High strength and high toughness non-heattreated cold formed parts and method for producing same
CN101845602A (en) * 2009-03-26 2010-09-29 宝山钢铁股份有限公司 High-performance weather-proof building structural steel and manufacturing method thereof
CN102534377A (en) * 2012-02-29 2012-07-04 首钢总公司 X70-degree large deformation resisting pipeline steel plate with excellent tenacity and preparation method for pipeline steel plate
CN102851589A (en) * 2011-06-29 2013-01-02 宝山钢铁股份有限公司 Steel for low temperature structure with low yield ratio and capable of performing ultrahigh heat input and manufacture method thereof
CN107502821A (en) * 2017-08-29 2017-12-22 江阴兴澄特种钢铁有限公司 The economical X 70 pipeline steel plate and its manufacture method used under a kind of special think gauge ultra-low temperature surroundings
CN107904504A (en) * 2017-11-10 2018-04-13 钢铁研究总院 What a kind of normalizing state was delivered goods can Large Heat Input Welding EH36 special heavy plates and preparation method

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001131680A (en) * 1999-11-10 2001-05-15 Sumitomo Metal Ind Ltd High strength and high toughness non-heattreated cold formed parts and method for producing same
CN101845602A (en) * 2009-03-26 2010-09-29 宝山钢铁股份有限公司 High-performance weather-proof building structural steel and manufacturing method thereof
CN102851589A (en) * 2011-06-29 2013-01-02 宝山钢铁股份有限公司 Steel for low temperature structure with low yield ratio and capable of performing ultrahigh heat input and manufacture method thereof
CN102534377A (en) * 2012-02-29 2012-07-04 首钢总公司 X70-degree large deformation resisting pipeline steel plate with excellent tenacity and preparation method for pipeline steel plate
CN107502821A (en) * 2017-08-29 2017-12-22 江阴兴澄特种钢铁有限公司 The economical X 70 pipeline steel plate and its manufacture method used under a kind of special think gauge ultra-low temperature surroundings
CN107904504A (en) * 2017-11-10 2018-04-13 钢铁研究总院 What a kind of normalizing state was delivered goods can Large Heat Input Welding EH36 special heavy plates and preparation method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110860558A (en) * 2019-10-28 2020-03-06 南京钢铁股份有限公司 Rolling method of ultra-wide and ultra-thick steel containment nuclear power steel
CN110860558B (en) * 2019-10-28 2021-06-11 南京钢铁股份有限公司 Rolling method of ultra-wide and ultra-thick steel containment nuclear power steel

Similar Documents

Publication Publication Date Title
CN103506380B (en) A kind of production method reducing high-carbon barrel band practical decarburized depth
CN104141039B (en) A kind of rolling mill practice controlling 42CrMo steel bloom gren rod decarburization
CN104759469B (en) Exempt from the production method of annealing medium carbon cold heading steel hot rolling wire
CN101748257B (en) Method for manufacturing oriented silicon steel
CN103710507B (en) A kind of preparation method of low nickel duplex stainless steel hot-rolled sheet coil
CN103191928B (en) 304 stainless steel strip and production method thereof
CN106862269A (en) It is a kind of to suppress the method that magnesium alloy plate edge splits
CN104525560A (en) Effective control method for pitted surface of plain carbon steel/Nb-containing steel plate of 20-30 mm thickness
CN102266866B (en) Technology for producing hot-rolled pipeline steel of roll mill with single frame furnace
CN106636747B (en) A kind of manufacturing method using heavy and medium plate mill double annealing production technical pure titanium plate
CN104745780A (en) Production method for forging and thermally treating Cr12MoV steel
CN110000221A (en) A method of improving non-orientation silicon steel hot rolling flanging part threadiness upwarping defect
CN104550234A (en) Rolling method of pipeline steel and stainless steel composite plate
CN104998927A (en) Thick standard hot rolling nose plate thermal straightening process
CN104988409A (en) Non-annealed cold forging steel hot-rolled wire rod and production method thereof
CN103215422A (en) Method for plastically producing thin stainless steel cold-rolled plates by utilizing hot-rolled steel bands
CN105772502A (en) Asymmetrical rolling method for producing high-grade non-oriented silicon steel
CN107893155B (en) A method of eliminating phosphorous high-strength IF steel surface chromatic aberration defect
CN109226259A (en) A method of improving hot rolling pipeline steel oxidation iron sheet integrality
CN104328261B (en) Cold forming deformation reinforcement technology during non-tempered steel bolt manufacture process
CN105624382A (en) Hot-rolling method for V-Ti microalloyed steel
CN105369021A (en) On-line quenching and cooling method taking account of shape and performance of thin-specification high-strength steel plate
CN103031489B (en) Production method of Q345B steel plate
CN101745540A (en) Process for improving ultra-thick head and tail of hot rolling strip steel of Steckel mill
CN109023057A (en) A kind of production method improving the impact of X80M grades of pipe line steel center portions

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication

Application publication date: 20190201

RJ01 Rejection of invention patent application after publication