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 PDFInfo
- 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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- China
- Prior art keywords
- heat treatment
- tempering
- roll
- differential temperature
- temperature
- Prior art date
Links
- 238000010438 heat treatment Methods 0.000 title claims abstract description 76
- 229910001263 D-2 tool steel Inorganic materials 0.000 title claims abstract description 43
- 239000002131 composite materials Substances 0.000 title abstract 2
- 238000005496 tempering Methods 0.000 claims abstract description 71
- 241001081830 Degeneriaceae Species 0.000 claims abstract description 44
- 150000001875 compounds Chemical class 0.000 claims abstract description 37
- 238000000034 methods Methods 0.000 claims abstract description 12
- 238000010791 quenching Methods 0.000 claims abstract description 12
- 230000000171 quenching Effects 0.000 claims abstract description 12
- 239000010410 layers Substances 0.000 claims abstract description 5
- 238000007669 thermal treatment Methods 0.000 claims description 24
- 239000003570 air Substances 0.000 claims description 9
- 238000009413 insulation Methods 0.000 claims description 8
- 238000002791 soaking Methods 0.000 claims description 6
- 229910001141 Ductile iron Inorganic materials 0.000 abstract description 7
- 238000005265 energy consumption Methods 0.000 abstract description 7
- 238000001816 cooling Methods 0.000 abstract description 5
- 238000004321 preservation Methods 0.000 abstract 5
- 238000005422 blasting Methods 0.000 abstract 1
- 210000001519 tissues Anatomy 0.000 description 8
- 239000000463 materials Substances 0.000 description 4
- 238000005516 engineering processes Methods 0.000 description 3
- 239000011162 core materials Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 239000003595 mist Substances 0.000 description 1
- 239000003607 modifiers Substances 0.000 description 1
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 BY DECARBURISATION, TEMPERING OR OTHER TREATMENTS
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
- C21D1/19—Hardening; Quenching with or without subsequent tempering by interrupted quenching
-
- 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 BY DECARBURISATION, TEMPERING OR OTHER TREATMENTS
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/38—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for roll bodies
Abstract
Description
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)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410492972.7A CN104313292A (en) | 2014-09-24 | 2014-09-24 | Differential temperature heat treatment method of D2 steel centrifugal composite roller |
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| CN201410492972.7A CN104313292A (en) | 2014-09-24 | 2014-09-24 | Differential temperature heat treatment method of D2 steel centrifugal composite roller |
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| CN104313292A true CN104313292A (en) | 2015-01-28 |
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Cited By (1)
| 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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| 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 |
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2014
- 2014-09-24 CN CN201410492972.7A patent/CN104313292A/en not_active Application Discontinuation
Patent Citations (7)
| 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 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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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