CN109014107A - The control method of big specification high-carbon-chromium bearing steel shrinkage cavity defect - Google Patents

The control method of big specification high-carbon-chromium bearing steel shrinkage cavity defect Download PDF

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Publication number
CN109014107A
CN109014107A CN201810795655.0A CN201810795655A CN109014107A CN 109014107 A CN109014107 A CN 109014107A CN 201810795655 A CN201810795655 A CN 201810795655A CN 109014107 A CN109014107 A CN 109014107A
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CN
China
Prior art keywords
rolling
shrinkage cavity
temperature
heating
core
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
CN201810795655.0A
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Chinese (zh)
Inventor
张玉亭
刘宪民
王京华
杨路学
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CERI YINGKOU EQUIPMENT DEVELOPMENT AND MANUFACTURING Co Ltd
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CERI YINGKOU EQUIPMENT DEVELOPMENT AND MANUFACTURING Co Ltd
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Application filed by CERI YINGKOU EQUIPMENT DEVELOPMENT AND MANUFACTURING Co Ltd filed Critical CERI YINGKOU EQUIPMENT DEVELOPMENT AND MANUFACTURING Co Ltd
Priority to CN201810795655.0A priority Critical patent/CN109014107A/en
Publication of CN109014107A publication Critical patent/CN109014107A/en
Pending legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/16Controlling or regulating processes or operations
    • B22D11/20Controlling or regulating processes or operations for removing cast stock
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B1/00Metal-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
    • B21B1/46Metal-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 metal immediately subsequent to continuous casting
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B37/00Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/74Temperature control, e.g. by cooling or heating the rolls or the product

Abstract

The invention discloses a kind of control methods of big specification high-carbon-chromium bearing steel shrinkage cavity defect comprising continuous casting, heating and the operation of rolling, in the heating process, heating time is pressed 15~25 hours;In the operation of rolling, start rolling temperature is controlled by 1120~1160 DEG C.After this method technique, appropriate heating time is controlled, the residence time of high temperature section can be shortened, blank core is avoided excessive temperature occur.Meanwhile the low melting point of core is relatively more, can occur core melting in the case that internal temperature is got higher in subsequent rolling;Since during the rolling process, blank is squeezed, internal temperature is increased, and core temperature can be higher.Therefore, appropriate low start rolling temperature, can avoid appearance that is core melting, thus avoiding shrinkage cavity.This method is improved techniques, the low power shrinkage cavities such as heating, rolling and is obviously improved, and shrinkage cavity is effectively eliminated.

Description

The control method of big specification high-carbon-chromium bearing steel shrinkage cavity defect
Technical field
The present invention relates to a kind of production method of bearing steel, especially a kind of big specification high-carbon-chromium bearing steel shrinkage cavity defect Control method.
Background technique
High-carbon-chromium bearing steel is generally produced by large-scale continuous casting round billet, continuous cast round billets it is different degrees of there are low power shrinkage cavities.One As in the case of, the following bearing steel low power of Φ 150mm does not have shrinkage cavity, and standard is not allow for shrinkage cavity, can satisfy user requirement; And there is low power shrinkage cavity more in big specification (Φ 150mm or more), cause to be unable to satisfy user demand.Big specification bearing steel according to Moulded steel production, can satisfy requirement, but cost can be increased significantly, weakens the market competitiveness, greatly constrain big rule The exploitation of the high-end bearing steel of lattice.
Big specification high-carbon-chromium bearing steel low power shrinkage cavity, think always be due to caused by continuous cast round billets low power shrinkage cavity, because This all technology is all around low power shrinkage cavity, raising heating time, raising heating temperature and the increase rolling for reducing continuous casting billet Drafts etc. is studied, optimized and is developed;However after having conducted extensive research the work of test, shrinkage cavity is still deposited It is being significantly improved without any.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of big specification high carbon chromium bearings that can be obviously improved low power shrinkage cavity The control method of steel shrinkage cavity defect.
In order to solve the above technical problems, the technical solution used in the present invention is: it includes continuous casting, heating and rolled Journey, in the heating process, heating total time is 15~25 hours;In the operation of rolling, start rolling temperature presses 1120~1160 It DEG C is controlled.
In continuous casting process of the present invention, molten steel overheat is controlled by 20~30 DEG C.
In continuous casting process of the present invention, 450~Φ of Φ, 600 round billet pulling rate is by 0.20~0.40 m/min of control.
The beneficial effects of adopting the technical scheme are that inventor has found long-time high temperature section in the prior art Retention time and higher start rolling temperature technology can be such that core when rolling overheats, and part is melted, and then occurs core in process of setting It shrinks, forms so-called shrinkage cavity.Therefore the present invention improves techniques, the low power shrinkage cavities such as heating, rolling and is obviously improved, effectively Eliminate shrinkage cavity.
After present invention process: (1) controlling appropriate heating time, the residence time of high temperature section can be shortened, avoided There is excessive temperature in blank core.Meanwhile the low melting point of core is relatively more, internal temperature can get higher in subsequent rolling In the case where, occur core melting.(2) since during the rolling process, blank is squeezed, internal temperature is increased, core temperature It can be higher.Therefore, appropriate low start rolling temperature, can avoid appearance that is core melting, thus avoiding shrinkage cavity.(3) solute in steel When element solidifies, due to the difference of respective fusing point, there is the phenomenon that choosing point crystallization.Bearing steel carbon content is high, and segregation tendency is heavier. After the degree of superheat is high, setting time is lengthened, and choosing divides crystallization degree heavier, and liquid phase mushy zone is longer, when subsequent feeding is insufficient, meeting Form shrinkage cavity;Prepared by Low Superheat Pouring can suitably alleviate the phenomenon of feeding deficiency.(4) pulling rate of general other steel of this specification is wanted Control controls relatively low pulling rate in 0.24~0.60m/min, can suitably reduce liquid phase paste section length, reduces feeding Insufficient degree.
Specific embodiment
The present invention will be further described in detail with reference to the specific embodiments.
Embodiment 1-10: the control method of this big specification high-carbon-chromium bearing steel shrinkage cavity defect uses following concrete technologies.
(1) this method includes continuous casting, heating and the operation of rolling.In the continuous casting process, molten steel overheat presses 20~30 DEG C It is controlled, Φ 450~Φ 600mm round billet pulling rate is by 0.20~0.40 m/min of control.In the heating process, heating is total Time is 15~25 hours.In the operation of rolling, start rolling temperature is controlled by 1120~1160 DEG C.The technique of each embodiment Parameter is shown in Table 1.
Table 1: the technological parameter of each embodiment
(2) using the big specification high-carbon-chromium bearing steel of this method production, quality is effectively promoted, and reduce production cost. It is compared using low power, the high power index that this method low power obtained, high power index and former technical matters obtain and is shown in Table 2.
Table 2: this method and the index of original process products obtained therefrom compare
In table 2: (1) former technology 1: optimization the continuous casting degree of superheat, pulling rate technical parameter and are rolled rear round steel low power shrinkage cavity and are not changed slab It is kind.In this technology, the degree of superheat is 18 DEG C~25 DEG C, and pulling rate is 0.20~0.30 m/min.
(2) former technology 2-3: extend heating time, improve start rolling temperature, rolling rear round steel low power shrinkage cavity does not improve.This skill In art, the degree of superheat is 20~30 DEG C, and pulling rate is 0.20~0.30 meter of minute, and heating time is 30~40 hours, and start rolling temperature is 1160~1200 DEG C.
(3) former technology 4~5, increases cogging drafts, improves start rolling temperature, rolling rear round steel low power shrinkage cavity does not improve.This In technology, the degree of superheat is 21~33 DEG C, and pulling rate is 0.20~0.40 m/min, and cogging drafts is 70~90mm, heating time For 25~30 hours/minute, start rolling temperature is 1170~1200 DEG C.
(4) using after this technique, other low powers and high power requirement such as center porosity, General Loosen, segregation, liquation, are shown Micropore etc. all meets the requirements of the customers without apparent variation occur or deteriorating.

Claims (3)

1. a kind of control method of big specification high-carbon-chromium bearing steel shrinkage cavity defect comprising continuous casting, heating and the operation of rolling, it is special Sign is: in the heating process, heating total time is 15~25 hours;In the operation of rolling, start rolling temperature by 1120~ 1160 DEG C are controlled.
2. the control method of big specification high-carbon-chromium bearing steel shrinkage cavity defect according to claim 1, it is characterised in that: described In continuous casting process, molten steel overheat is controlled by 20~30 DEG C.
3. the control method of big specification high-carbon-chromium bearing steel shrinkage cavity defect according to claim 1 or 2, it is characterised in that: In the continuous casting process, 450~Φ of Φ, 600 round billet pulling rate is by 0.20~0.40 m/min of control.
CN201810795655.0A 2018-07-19 2018-07-19 The control method of big specification high-carbon-chromium bearing steel shrinkage cavity defect Pending CN109014107A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810795655.0A CN109014107A (en) 2018-07-19 2018-07-19 The control method of big specification high-carbon-chromium bearing steel shrinkage cavity defect

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810795655.0A CN109014107A (en) 2018-07-19 2018-07-19 The control method of big specification high-carbon-chromium bearing steel shrinkage cavity defect

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CN109014107A true CN109014107A (en) 2018-12-18

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110883104A (en) * 2019-12-11 2020-03-17 马鞍山钢铁股份有限公司 Rolling process for producing steel blank for railway axle by using continuous casting round blank

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101412183A (en) * 2008-11-28 2009-04-22 首钢总公司 Method for producing high-carbon chromium bearing steel by double retarded cooling process
CN101549353A (en) * 2008-03-31 2009-10-07 鞍钢股份有限公司 Method for producing low-alloy and large-size square steel by continuously casting and continuously rolling
CN102352466A (en) * 2011-11-02 2012-02-15 承德建龙特殊钢有限公司 High-carbon chromium bearing steel GCr15 and production method thereof
CN102784800A (en) * 2011-12-07 2012-11-21 鞍钢股份有限公司 Method for controlling center porosity defect of bearing steel
CN104032221A (en) * 2014-03-18 2014-09-10 北京科技大学 Niobium microalloying high-carbon chromium bearing steel and hot rolling production method thereof
CN104212955A (en) * 2014-09-01 2014-12-17 武汉钢铁(集团)公司 Method for reducing carbide liquation level in high-carbon chromium bearing steel
CN104651754A (en) * 2015-02-05 2015-05-27 山东钢铁股份有限公司 Low alloy steel for high-pressure boiler tube and preparation method thereof
CN106048124A (en) * 2016-06-03 2016-10-26 江苏沙钢集团淮钢特钢股份有限公司 Technique for producing train axle steel through molten iron and stepped argon blowing sealing structure for technique
CN106086353A (en) * 2016-08-29 2016-11-09 湖北新冶钢有限公司 Control the milling method that big cross section GCr15 bearing steel net carbide separates out
CN106086678A (en) * 2016-08-02 2016-11-09 东北特钢集团北满特殊钢有限责任公司 High life bearing steel material and processing method thereof
CN107747034A (en) * 2017-10-20 2018-03-02 江阴兴澄特种钢铁有限公司 A kind of railway truck bearing high-carbon-chromium bearing steel and preparation method thereof
CN107904492A (en) * 2017-11-25 2018-04-13 江阴兴澄特种钢铁有限公司 A kind of low silicon high-carbon-chromium bearing steel and its hot rolling production method

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101549353A (en) * 2008-03-31 2009-10-07 鞍钢股份有限公司 Method for producing low-alloy and large-size square steel by continuously casting and continuously rolling
CN101412183A (en) * 2008-11-28 2009-04-22 首钢总公司 Method for producing high-carbon chromium bearing steel by double retarded cooling process
CN102352466A (en) * 2011-11-02 2012-02-15 承德建龙特殊钢有限公司 High-carbon chromium bearing steel GCr15 and production method thereof
CN102784800A (en) * 2011-12-07 2012-11-21 鞍钢股份有限公司 Method for controlling center porosity defect of bearing steel
CN104032221A (en) * 2014-03-18 2014-09-10 北京科技大学 Niobium microalloying high-carbon chromium bearing steel and hot rolling production method thereof
CN104212955A (en) * 2014-09-01 2014-12-17 武汉钢铁(集团)公司 Method for reducing carbide liquation level in high-carbon chromium bearing steel
CN104651754A (en) * 2015-02-05 2015-05-27 山东钢铁股份有限公司 Low alloy steel for high-pressure boiler tube and preparation method thereof
CN106048124A (en) * 2016-06-03 2016-10-26 江苏沙钢集团淮钢特钢股份有限公司 Technique for producing train axle steel through molten iron and stepped argon blowing sealing structure for technique
CN106086678A (en) * 2016-08-02 2016-11-09 东北特钢集团北满特殊钢有限责任公司 High life bearing steel material and processing method thereof
CN106086353A (en) * 2016-08-29 2016-11-09 湖北新冶钢有限公司 Control the milling method that big cross section GCr15 bearing steel net carbide separates out
CN107747034A (en) * 2017-10-20 2018-03-02 江阴兴澄特种钢铁有限公司 A kind of railway truck bearing high-carbon-chromium bearing steel and preparation method thereof
CN107904492A (en) * 2017-11-25 2018-04-13 江阴兴澄特种钢铁有限公司 A kind of low silicon high-carbon-chromium bearing steel and its hot rolling production method

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
李连江: "石钢GCr15轴承钢控制轧制和控制冷却生产实践", 《河北冶金》 *
许加陆等: "高碳铬轴承钢连铸圆坯冷装加热工艺分析", 《现代冶金》 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110883104A (en) * 2019-12-11 2020-03-17 马鞍山钢铁股份有限公司 Rolling process for producing steel blank for railway axle by using continuous casting round blank

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