CN104313292A - Differential temperature heat treatment method of D2 steel centrifugal composite roller - Google Patents

Differential temperature heat treatment method of D2 steel centrifugal composite roller Download PDF

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Publication number
CN104313292A
CN104313292A CN201410492972.7A CN201410492972A CN104313292A CN 104313292 A CN104313292 A CN 104313292A CN 201410492972 A CN201410492972 A CN 201410492972A CN 104313292 A CN104313292 A CN 104313292A
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CN
China
Prior art keywords
heat treatment
tempering
roll
differential temperature
temperature
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Application number
CN201410492972.7A
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Chinese (zh)
Inventor
朱健
堵治君
李军
陈先锋
邵黎军
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江苏共昌轧辊股份有限公司
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Priority to CN201410492972.7A priority Critical patent/CN104313292A/en
Publication of CN104313292A publication Critical patent/CN104313292A/en

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Classifications

    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHER TREATMENTS
    • C21D1/00General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/18Hardening; Quenching with or without subsequent tempering
    • C21D1/19Hardening; Quenching with or without subsequent tempering by interrupted quenching
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHER TREATMENTS
    • C21D9/00Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/38Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for roll bodies

Abstract

The invention discloses a differential temperature heat treatment method of a D2 steel centrifugal composite roller. The method comprises the following steps: 1), firstly, hanging a rough-processed roller into a resistance type heat treatment furnace, and preheating to 900-950 DEG C; 2), after preheating, hanging into a Selas furnace, quickly heating up to 1000-1020 DEG C, carrying out high temperature quenching, and carrying out heat preservation with T[preservation]=(2-4 min/mm)*H[outside], wherein the T[preservation] is the heat preservation time (min), and H[outside] is the thickness (mm) of an outer layer of the roller; 3), after finishing the heat preservation, carrying out air-blasting quenching and cooling to 350-400 DEG C; and 4), finally, hanging into the resistance type heat treatment furnace, carrying out tempering heat treatment, after finishing the tempering heat treatment, cooling the roller to the room temperature, and thus completing the differential temperature heat treatment process of the D2 steel centrifugal compound roller. By the differential temperature heat treatment way, completely thorough quenching of the D2 steel outer layer is guaranteed and spheroidal graphite cast iron of a core shaft part is not affected by high temperatures, the use performance of the roller is increased, and energy consumption of heat treatment is reduced.

Description

A kind of differential temperature heat treating method of D2 steel centrifugal compound roll

Technical field

The present invention relates to roll technical field of heat treatment, specifically the differential temperature heat treating method of a kind of outer high-hardenability, mandrel site tissue and performance is unaffected, thermal treatment energy consumption is low D2 steel centrifugal compound roll.

Background technology

At present, major part needs the centrifugal compound roll of modifier treatment all to adopt overall heating and entire body heat penetration technique, this technique is due to long in hot stage soaking time, the spheroidal graphite cast iron (QT400) at centrifugal compound roll mandrel position is difficult to the high temperature action bearing more than 1000 DEG C for a long time, this heat affecting, by its tissue of severe exacerbation and obdurability, can bring safe handling hidden danger; In addition owing to adopting overall heating and entire body heat penetration technique, heat treatment cycle is long, thermal treatment energy consumption is also high, and outer field hardening capacity is also poor simultaneously, causes work roll cooling degraded performance.As Chinese patent discloses a kind of employing three sections of thermal treatment process, nodularization was degenerated and within 10 ~ 20 hours, is carried out austenitizing 850 ~ 900 DEG C of insulations, 700 ~ 800 DEG C of isothermal spheroidizings insulations 12 ~ 24 hours; Normalizing treatment after roughing: 1000 ~ 1150 DEG C are incubated 6 ~ 12 hours, mist is cold to be added and is air-cooledly cooled to 500 ~ 600 DEG C to carry out tempering insulation, soaking time is 12 ~ 24 hours, adopts this kind of normalizing process: one is that high temperature 1000 ~ 1150 DEG C of soaking times are long, and thermal treatment energy consumption is high; Two to be that core bears the high temperature action time long, the tissue of severe exacerbation core material and obdurability.

Summary of the invention

The object of the invention is the defect existed for prior art, provide a kind of outer high-hardenability, mandrel site tissue and the differential temperature heat treating method of performance is unaffected, thermal treatment energy consumption is low D2 steel centrifugal compound roll.

The object of the invention is to solve by the following technical programs:

A differential temperature heat treating method for D2 steel centrifugal compound roll, is characterized in that: the step of this differential temperature heat treating method is as follows:

1), first the roll that roughing is good is hung in resistance-type heat treatment furnace and be preheated to 900 ~ 950 DEG C;

2), hang in Sai Lasi stove after preheating to be rapidly heated to 1000 ~ 1020 DEG C and carry out quench hot, and be incubated T protect=(2 ~ 4min/mm) * H outward, wherein T protectfor soaking time min, H outwardfor the outer layer thickness mm of roll;

3), insulation winches to wind and quenches and machine carries out air blast quenching be cooled to 350 ~ 400 DEG C after terminating;

4), finally hang in resistance-type heat treatment furnace and carry out tempering heat treatment, tempering heat treatment terminates the differential temperature heat treatment process that namely rear roll rolipass design to room temperature completes D2 steel centrifugal compound roll.

Tempering heat treatment in step 4) comprises double tempering thermal treatment, and the tempering temperature of second time tempering heat treatment is higher than the tempering temperature of first time tempering heat treatment.

Tempering heat treatment in step 4) comprises double tempering thermal treatment, and the tempering temperature of tempering heat treatment is 480 ~ 500 DEG C, time length 12 ~ 28h for the first time.

Tempering heat treatment in step 4) comprises double tempering thermal treatment, and the tempering temperature of second time tempering heat treatment is 510 ~ 530 DEG C, time length 12 ~ 28h.

The present invention has the following advantages compared to existing technology:

The present invention according to the outer material of D2 steel centrifugal compound roll be D2 steel, mandrel position material is the characteristic of spheroidal graphite cast iron, first to the good roll of roughing in the preheating of resistance-type heat treatment furnace, then the quench hot carrying out the short period of time in Sai Lasi stove is hung in, air blast quenching cooling is carried out after high-temperature heat treatment, finally hang in resistance-type heat treatment furnace and carry out double tempering thermal treatment, and second time tempering temperature is greater than first time tempering temperature, thus ensure the outer field complete through hardening of D2 steel, mandrel position spheroidal graphite cast iron not by the impact of high temperature; And this differential temperature heat treating method can improve the use properties of roll, significantly can reduce the heat treated energy consumption of roll again, reach optimal heat treatment effect and object.

Embodiment

Below in conjunction with embodiment, the present invention is further illustrated.

A differential temperature heat treating method for D2 steel centrifugal compound roll, the step of this differential temperature heat treating method is as follows: 1), first by the roll that roughing is good hang in resistance-type heat treatment furnace and be preheated to 900 ~ 950 DEG C; 2), hang in Sai Lasi stove after preheating to be rapidly heated to 1000 ~ 1020 DEG C and carry out quench hot, and be incubated T protect=(2 ~ 4min/mm) * H outward, wherein T protectfor soaking time min, H outwardfor the outer layer thickness mm of roll; 3), insulation winches to wind and quenches and machine carries out air blast quenching be cooled to 350 ~ 400 DEG C after terminating; 4), finally hang in resistance-type heat treatment furnace and carry out double tempering thermal treatment, the tempering temperature of tempering heat treatment is 480 ~ 500 DEG C, time length 12 ~ 28h for the first time, the tempering temperature of second time tempering heat treatment is 510 ~ 530 DEG C, time length 12 ~ 28h, and second time tempering heat treatment terminates the differential temperature heat treatment process that namely rear roll rolipass design to room temperature completes D2 steel centrifugal compound roll.

Be further described below by the differential temperature heat treating method of specific embodiment to D2 steel centrifugal compound roll of the present invention.

Embodiment one

When needs are Φ 380, H to a kind of specification outwardwhen the D2 steel centrifugal compound roll of=60mm carries out differential temperature thermal treatment, the differential temperature heat treating method step of this D2 steel centrifugal compound roll is as follows: 1), first by the roll that roughing is good hang in resistance-type heat treatment furnace and be preheated to 900 DEG C; 2), hang in Sai Lasi stove after preheating to be rapidly heated to 1000 DEG C and carry out quench hot, and be incubated 120min; 3), insulation winches to wind and quenches and machine carries out air blast quenching be cooled to 350 ~ 400 DEG C after terminating; 4), finally hang in resistance-type heat treatment furnace and carry out double tempering thermal treatment, the tempering temperature of tempering heat treatment is 480 DEG C and time length 18h for the first time, the tempering temperature of second time tempering heat treatment is 510 DEG C and time length 24h, and second time tempering heat treatment terminates the differential temperature heat treatment process that namely rear roll rolipass design to room temperature completes D2 steel centrifugal compound roll.Adopt this differential temperature heat treating method can obtain outer high-hardenability, mandrel site tissue and D2 steel centrifugal compound roll of good performance, reach best differential temperature thermal effectiveness and object.

Embodiment two

When needs are Φ 400, H to a kind of specification outwardwhen the D2 steel centrifugal compound roll of=60mm carries out differential temperature thermal treatment, the differential temperature heat treating method step of this D2 steel centrifugal compound roll is as follows: 1), first by the roll that roughing is good hang in resistance-type heat treatment furnace and be preheated to 920 DEG C; 2), hang in Sai Lasi stove after preheating to be rapidly heated to 1000 DEG C and carry out quench hot, and be incubated 150min; 3), insulation winches to wind and quenches and machine carries out air blast quenching be cooled to 350 ~ 400 DEG C after terminating; 4), finally hang in resistance-type heat treatment furnace and carry out double tempering thermal treatment, the tempering temperature of tempering heat treatment is 490 DEG C and time length 24h for the first time, the tempering temperature of second time tempering heat treatment is 510 DEG C and time length 22h, and second time tempering heat treatment terminates the differential temperature heat treatment process that namely rear roll rolipass design to room temperature completes D2 steel centrifugal compound roll.Adopt this differential temperature heat treating method can obtain outer high-hardenability, mandrel site tissue and D2 steel centrifugal compound roll of good performance, reach best differential temperature thermal effectiveness and object.

Embodiment three

When needs are Φ 450, H to a kind of specification outwardwhen the D2 steel centrifugal compound roll of=70mm carries out differential temperature thermal treatment, the differential temperature heat treating method step of this D2 steel centrifugal compound roll is as follows: 1), first by the roll that roughing is good hang in resistance-type heat treatment furnace and be preheated to 950 DEG C; 2), hang in Sai Lasi stove after preheating to be rapidly heated to 1010 DEG C and carry out quench hot, and be incubated 210min; 3), insulation winches to wind and quenches and machine carries out air blast quenching be cooled to 350 ~ 400 DEG C after terminating; 4), finally hang in resistance-type heat treatment furnace and carry out double tempering thermal treatment, the tempering temperature of tempering heat treatment is 500 DEG C and time length 26h for the first time, the tempering temperature of second time tempering heat treatment is 520 DEG C and time length 26h, and second time tempering heat treatment terminates the differential temperature heat treatment process that namely rear roll rolipass design to room temperature completes D2 steel centrifugal compound roll.Adopt this differential temperature heat treating method can obtain outer high-hardenability, mandrel site tissue and D2 steel centrifugal compound roll of good performance, reach best differential temperature thermal effectiveness and object.

Embodiment four

When needs are Φ 700, H to a kind of specification outwardwhen the D2 steel centrifugal compound roll of=80mm carries out differential temperature thermal treatment, the differential temperature heat treating method step of this D2 steel centrifugal compound roll is as follows: 1), first by the roll that roughing is good hang in resistance-type heat treatment furnace and be preheated to 930 DEG C; 2), hang in Sai Lasi stove after preheating to be rapidly heated to 1020 DEG C and carry out quench hot, and be incubated 320min; 3), insulation winches to wind and quenches and machine carries out air blast quenching be cooled to 350 ~ 400 DEG C after terminating; 4), finally hang in resistance-type heat treatment furnace and carry out double tempering thermal treatment, the tempering temperature of tempering heat treatment is 490 DEG C and time length 22h for the first time, the tempering temperature of second time tempering heat treatment is 530 DEG C and time length 26h, and second time tempering heat treatment terminates the differential temperature heat treatment process that namely rear roll rolipass design to room temperature completes D2 steel centrifugal compound roll.Adopt this differential temperature heat treating method can obtain outer high-hardenability, mandrel site tissue and D2 steel centrifugal compound roll of good performance, reach best differential temperature thermal effectiveness and object.

As shown in the table to the ectonexine performance of the D2 steel centrifugal compound roll after above-described embodiment one, embodiment two, embodiment three and the thermal treatment of embodiment four differential temperature:

As seen from the above table, by the D2 steel centrifugal compound roll after differential temperature thermal treatment provided by the invention, the outer field complete through hardening of D2 steel can be ensured, mandrel position spheroidal graphite cast iron can be ensured again not by the impact of high temperature.Achieve D2 steel centrifugal compound roll heat treated reliable and stable.

The present invention according to the outer material of D2 steel centrifugal compound roll be D2 steel, mandrel position material is the characteristic of spheroidal graphite cast iron, first to the good roll of roughing in the preheating of resistance-type heat treatment furnace, then the quench hot carrying out the short period of time in Sai Lasi stove is hung in, air blast quenching cooling is carried out after high-temperature heat treatment, finally hang in resistance-type heat treatment furnace and carry out double tempering thermal treatment, and second time tempering temperature is greater than first time tempering temperature, thus ensure the outer field complete through hardening of D2 steel, mandrel position spheroidal graphite cast iron not by the impact of high temperature; And this differential temperature heat treating method can improve the use properties of roll, significantly can reduce the heat treated energy consumption of roll again, reach optimal heat treatment effect and object.

Above embodiment is only and technological thought of the present invention is described, can not limit protection scope of the present invention with this, every technological thought proposed according to the present invention, and any change that technical scheme basis is done, all falls within scope; The technology that the present invention does not relate to all is realized by prior art.

Claims (4)

1. a differential temperature heat treating method for D2 steel centrifugal compound roll, is characterized in that: the step of this differential temperature heat treating method is as follows:
1), first the roll that roughing is good is hung in resistance-type heat treatment furnace and be preheated to 900 ~ 950 DEG C;
2), hang in Sai Lasi stove after preheating to be rapidly heated to 1000 ~ 1020 DEG C and carry out quench hot, and be incubated T protect=(2 ~ 4min/mm) * H outward, wherein T protectfor soaking time min, H outwardfor the outer layer thickness mm of roll;
3), insulation winches to wind and quenches and machine carries out air blast quenching be cooled to 350 ~ 400 DEG C after terminating;
4), finally hang in resistance-type heat treatment furnace and carry out tempering heat treatment, tempering heat treatment terminates the differential temperature heat treatment process that namely rear roll rolipass design to room temperature completes D2 steel centrifugal compound roll.
2. the differential temperature heat treating method of D2 steel centrifugal compound roll according to claim 1, it is characterized in that: the tempering heat treatment in step 4) comprises double tempering thermal treatment, and the tempering temperature of second time tempering heat treatment is higher than the tempering temperature of first time tempering heat treatment.
3. the differential temperature heat treating method of D2 steel centrifugal compound roll according to claim 2, it is characterized in that: the tempering heat treatment in step 4) comprises double tempering thermal treatment, the tempering temperature of tempering heat treatment is 480 ~ 500 DEG C, time length 12 ~ 28h for the first time.
4. the differential temperature heat treating method of D2 steel centrifugal compound roll according to claim 2, it is characterized in that: the tempering heat treatment in step 4) comprises double tempering thermal treatment, the tempering temperature of second time tempering heat treatment is 510 ~ 530 DEG C, time length 12 ~ 28h.
CN201410492972.7A 2014-09-24 2014-09-24 Differential temperature heat treatment method of D2 steel centrifugal composite roller CN104313292A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106755855A (en) * 2016-12-13 2017-05-31 大连圣洁热处理科技发展有限公司 A kind of high strength Cr 12MoV/Cr12 clad steels high temperature quenching technical

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Publication number Priority date Publication date Assignee Title
CN101037760A (en) * 2007-04-03 2007-09-19 西安交通大学 High-carbon high-high-vanadium high-speed steel composite roller and heat treatment method thereof
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
CN101403032A (en) * 2008-11-12 2009-04-08 中国科学院金属研究所 Thermal treatment process for quick cutting steel composite roll
CN102321795A (en) * 2011-10-17 2012-01-18 中钢集团邢台机械轧辊有限公司 Heat treatment method for high ferrochrome roll requiring stepped hardness of roll body
CN102634733A (en) * 2012-04-06 2012-08-15 北京工业大学 Composite roll having uniform roll surface hardness and made of high-speed steel containing boron and method for manufacturing composite roll
CN103436679A (en) * 2013-07-30 2013-12-11 中钢集团邢台机械轧辊有限公司 Differential temperature heat treatment method of minor-diameter high chromium cast-iron roll
CN103667665A (en) * 2013-12-06 2014-03-26 天津重型装备工程研究有限公司 Differential temperature thermal processing method for high-chromium cast steel centrifugation composite working roll

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101037760A (en) * 2007-04-03 2007-09-19 西安交通大学 High-carbon high-high-vanadium high-speed steel composite roller and heat treatment method thereof
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
CN101403032A (en) * 2008-11-12 2009-04-08 中国科学院金属研究所 Thermal treatment process for quick cutting steel composite roll
CN102321795A (en) * 2011-10-17 2012-01-18 中钢集团邢台机械轧辊有限公司 Heat treatment method for high ferrochrome roll requiring stepped hardness of roll body
CN102634733A (en) * 2012-04-06 2012-08-15 北京工业大学 Composite roll having uniform roll surface hardness and made of high-speed steel containing boron and method for manufacturing composite roll
CN103436679A (en) * 2013-07-30 2013-12-11 中钢集团邢台机械轧辊有限公司 Differential temperature heat treatment method of minor-diameter high chromium cast-iron roll
CN103667665A (en) * 2013-12-06 2014-03-26 天津重型装备工程研究有限公司 Differential temperature thermal processing method for high-chromium cast steel centrifugation composite working roll

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106755855A (en) * 2016-12-13 2017-05-31 大连圣洁热处理科技发展有限公司 A kind of high strength Cr 12MoV/Cr12 clad steels high temperature quenching technical

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