CN101985685A - Roller tempering heat treatment process - Google Patents

Roller tempering heat treatment process Download PDF

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Publication number
CN101985685A
CN101985685A CN2010105546413A CN201010554641A CN101985685A CN 101985685 A CN101985685 A CN 101985685A CN 2010105546413 A CN2010105546413 A CN 2010105546413A CN 201010554641 A CN201010554641 A CN 201010554641A CN 101985685 A CN101985685 A CN 101985685A
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CN
China
Prior art keywords
tempering
temperature
adopted
roller
roll
Prior art date
Application number
CN2010105546413A
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Chinese (zh)
Inventor
原春光
Original Assignee
大连冶金工具厂有限公司
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.)
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Publication date
Application filed by 大连冶金工具厂有限公司 filed Critical 大连冶金工具厂有限公司
Priority to CN2010105546413A priority Critical patent/CN101985685A/en
Publication of CN101985685A publication Critical patent/CN101985685A/en

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Abstract

The invention discloses a roller tempering heat treatment process. The quenching heating temperature is 910 DEG C, the effective thickness of a workpiece is taken as a reference, the temperature is kept for 2 minutes for every millimeter, water quenching is carried out after time accumulation, and the quenching furnace cooling temperature is 160 to 180 DEG C; triple tempering is adopted, the tempering heating speed is 15-25 DEG C/h, the tempering temperature is 520 to 560 DEG C, and the temperature keeping time is 10 to 30 hours; and air cooling is adopted in the first tempering, the second tempering is carried out when the roller surface temperature is 160 to 180 DEG C, and furnace cooling is adopted in the second tempering; and air cooling is adopted in the third tempering, the effective thickness of the workpiece is taken as a reference, the temperature is kept for 10 minutes for every millimeter, and the time is accumulated. In the heat treatment process of rollers, the yield is high and the performance is stable, wherein deformation and cracking are reduced, the hardness of the roller surface is high and uniform, the radial hardness drop is small, and good properties of a roller core and a roller neck are ensured simultaneously.

Description

A kind of roll tempering heat treatment process

Technical field

The present invention relates to a kind ofly material be carried out the tempered thermal treatment process, a kind of roll tempering heat treatment process.

Background technology

Roll is the strength member on Steel Mill's rolling mill, and the pressure that produces when utilizing a pair of or one group of roll rolling rolls the stone roller steel.It mainly bears the sound load when rolling, wearing and tearing and influence of temperature variation.The material of working roll has 9Cr, 9Cr in the cold roll commonly used 2, 9Crv, 8CrMoV etc., cold roll requires hard surfacing, and hardness is HS45 ~ 105.Forged steel roll can be divided into Forged Steel Rolls For Hot Rolling and forging steel cold roll, and Forged Steel Rolls For Hot Rolling is mainly used in hot rolling cogging and shaped steel shaping roll, and forging steel cold roll is widely used as cold roll.Because cold rolled sheet requires quality higher, especially cold rolled sheet is widely used in industries such as light industry, automobile, building and railway, produce high-quality cold rolled sheet, must there be high-quality cold roll to do assurance, performance to cold roll proposes very high requirement like this: body surface must have height and uniform hardness, to guarantee the dimensional precision and the favorable surface quality of cold-strip or steel plate; The reasonableness of roller processing technology and accuracy are whether roll has certain depth of hardening zone; Assurance with high anti-accident ability.It also is the subject matter difficult point that exists at present.

Summary of the invention

Defective in view of prior art exists the object of the present invention is to provide a kind of roll tempering heat treatment process, makes roll yield rate height in heat treatment process, stable performance.Wherein, comprise less distortion and cracking, roll surface hardness height, uniformity of hardness is good, and the radial stiffness drop is little, guarantees the superperformance of roller core and roll neck simultaneously.

For achieving the above object, the technology used in the present invention solution is that quenching temperature is 910 ℃, with the workpiece net thickness is benchmark, every mm thick insulation 2 minutes is carried out shrend, 160 ℃ ~ 180 ℃ of the cold temperature of quenching furnance after the cumulative time, three tempering are adopted in tempering, the tempering rate of heating is 15 ~ 25 ℃/h, 520 ~ 560 ℃ of tempering temperatures, soaking time 10 ~ 30h; Air cooling is adopted in a tempering, carries out double tempering during 160 ℃ ~ 180 ℃ of roll surface temperatures, and double tempering adopts stove cold.Air cooling is adopted in three tempering, and the time is benchmark with the workpiece net thickness, every mm thick insulation 10 minutes, cumulative time.

After adopting such scheme, compared with prior art have following beneficial effect: quenching technology of the present invention has guaranteed the depth of hardening zone that workpiece is certain, and depth of hardening zone increases, and can reduce the roll number of times of heavily quenching in use, reduces the roll cost greatly.

Embodiment

A kind of roll tempering heat treatment process: quenching temperature is 910 ℃, with the workpiece net thickness is benchmark, and shrend is carried out in every mm thick insulation 2 minutes after the cumulative time, suppose that the workpiece net thickness is 10mm, then under 910 ℃ temperature, be incubated 20 minutes, use shrend, 160 ℃ ~ 180 ℃ of the cold temperature of quenching furnance, three tempering are adopted in tempering, the tempering rate of heating is 15 ~ 25 ℃/h, 520 ~ 560 ℃ of tempering temperatures, soaking time 10 ~ 30h; Air cooling is adopted in a tempering, carries out double tempering during 160 ℃ ~ 180 ℃ of roll surface temperatures, and double tempering adopts stove cold; Air cooling is adopted in three tempering, and the time is benchmark with the workpiece net thickness, every mm thick insulation 10 minutes, and the cumulative time, 100 minutes hold-times, cold roll requires hard surfacing, and hardness is HS45 ~ 105.

Claims (1)

1. roll tempering heat treatment process, it is characterized in that: quenching temperature is 910 ℃, with the workpiece net thickness is benchmark, every mm thick insulation 2 minutes is carried out shrend, 160 ℃ ~ 180 ℃ of the cold temperature of quenching furnance after the cumulative time, three tempering are adopted in tempering, the tempering rate of heating is 15 ~ 25 ℃/h, 520 ~ 560 ℃ of tempering temperatures, soaking time 10 ~ 30h; Air cooling is adopted in a tempering, carries out double tempering during 160 ℃ ~ 180 ℃ of roll surface temperatures, and double tempering adopts stove cold; Air cooling is adopted in three tempering, and the time is benchmark with the workpiece net thickness, every mm thick insulation 10 minutes, cumulative time.
CN2010105546413A 2010-11-23 2010-11-23 Roller tempering heat treatment process CN101985685A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2010105546413A CN101985685A (en) 2010-11-23 2010-11-23 Roller tempering heat treatment process

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2010105546413A CN101985685A (en) 2010-11-23 2010-11-23 Roller tempering heat treatment process

Publications (1)

Publication Number Publication Date
CN101985685A true CN101985685A (en) 2011-03-16

Family

ID=43710085

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2010105546413A CN101985685A (en) 2010-11-23 2010-11-23 Roller tempering heat treatment process

Country Status (1)

Country Link
CN (1) CN101985685A (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1594636A (en) * 2004-07-08 2005-03-16 李春治 Roll ring steel for aluminium casting rolling mill and heat treatment method thereof
CN101186993A (en) * 2007-12-18 2008-05-28 宝钢集团常州轧辊制造公司 Hydrogen embrittlement resistant roller and method for preparing same
CN101240402A (en) * 2008-02-04 2008-08-13 向勇 Cast high-boron high-speed steel for composite ring roller and heat treatment method thereof
CN101623751A (en) * 2009-08-14 2010-01-13 北京工业大学 Method for preparing boracic low-alloy high-speed steel rolls

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1594636A (en) * 2004-07-08 2005-03-16 李春治 Roll ring steel for aluminium casting rolling mill and heat treatment method thereof
CN101186993A (en) * 2007-12-18 2008-05-28 宝钢集团常州轧辊制造公司 Hydrogen embrittlement resistant roller and method for preparing same
CN101240402A (en) * 2008-02-04 2008-08-13 向勇 Cast high-boron high-speed steel for composite ring roller and heat treatment method thereof
CN101623751A (en) * 2009-08-14 2010-01-13 北京工业大学 Method for preparing boracic low-alloy high-speed steel rolls

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Application publication date: 20110316

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