CN102051448A - Method for low temperature tempering of die flat steel - Google Patents
Method for low temperature tempering of die flat steel Download PDFInfo
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- CN102051448A CN102051448A CN 201110020023 CN201110020023A CN102051448A CN 102051448 A CN102051448 A CN 102051448A CN 201110020023 CN201110020023 CN 201110020023 CN 201110020023 A CN201110020023 A CN 201110020023A CN 102051448 A CN102051448 A CN 102051448A
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Abstract
The invention relates to a method for low temperature tempering of die flat steel, which comprises the following steps of: I, loading the die flat steel into a bogie hearth annealing furnace; II, supplying power for raising the temperature from the initial temperature of 100DEG C to 300+/-10DEGC at a speed of 100+/-10DEG C per hour; III, keeping the die flat steel at the temperature of 300+/-10DEG C for 3 hours+/-20 minutes; IV, raising the temperature to 450+/-10DEG C at a speed of 100+/-10DEG C per hour; V, keeping the die flat steel at the temperature of 450+/-10DEG C for 4 hours+/-20 minutes; VI, reducing the temperature to 430+/-10DEG C at a speed of 50+/-10DEG C, and cutting off a power supply; VII, keeping the temperature at 430+/-10DEG C for 12 hours+/-20 minutes; and VIII, discharging from the furnace, cooling in the air, taking the die flat steel out of the bogie hearth annealing furnace, and naturally cooling in the air. In the method for low temperature tempering of the die flat steel, the bogie hearth annealing furnace replaces a special low temperature tempering furnace, the tempering efficiency is high, and the production efficiency is improved.
Description
Technical field
The present invention relates to a kind of method of mould band steel low-temperaturetempering.
Background technology
Non-modified pre-hard attitude mould of plastics band steel is as the rolling main products of blooming mill, need to adopt slow cooling, low-temperaturetempering technology after rolling, existing mould band steel low-temperaturetempering method only adopts a low-temperaturetempering stove, and production efficiency is low, can't satisfy the low-temperaturetempering demand of monthly output band steel more than 1000 tons.
Summary of the invention
For the above-mentioned deficiency of the method that overcomes existing mold band steel low-temperaturetempering, the invention provides the method for the high mould band steel low-temperaturetempering of a kind of production efficiency.
Design of the present invention is to increase by 300 ℃ of heat preservation method platforms in the existing trolley type annealing furnace temperature rise period, avoid the unexpected high temperature that can't guarantee that heat-up rate causes, speed during then with 100 ℃/h was raised to 450 ℃ of follow-up continuation of insurance temperature after 3-4 hour, turning back to former process stipulation temperature is incubated for 430 ℃, guarantee the successional while of technology, make material temperature and the abundant soaking of furnace temperature by the temperature raising samming, thereby satisfy the low-temperaturetempering processing requirement.By the data after the low-temperaturetempering test are analyzed, proved, temper number can satisfy pre-hard processing requirement fully.
The method of this mould band steel low-temperaturetempering comprises following sequential steps:
I is with the mould band steel workpiece chassis annealing furnace of packing into;
The II intensification of switching on, setting initial temperature is 100 ℃, per hour 100 ℃ ± 10 ℃ of heat-up rates rise to 300 ℃ ± 10 ℃;
The III insulation
Mould band steel workpiece was 300 ℃ ± 10 ℃ insulations 3 hours ± 20 minutes;
IV heats up once more
The power that strengthens the chassis annealing furnace heats up once more, and per hour 100 ℃ ± 10 ℃ of heat-up rates are raised to 450 ℃ ± 10 ℃;
V is incubated once more
Mould band steel workpiece was 450 ℃ ± 10 ℃ insulations 4 hours ± 20 minutes;
The VI cooling
Cut off the electricity supply, cool to 430 ℃ ± 10 ℃ with per hour 50 ℃ ± 10 ℃ speed;
VII is incubated for the third time
430 ℃ ± 10 ℃ insulations 12 hours ± 20 minutes;
The VIII air cooling of coming out of the stove
Mould band steel workpiece is taken out chassis annealing furnace, naturally cooling in air.Be cooled to normal temperature.
The present invention takes above-mentioned tempering method, mould band steel hardness satisfies processing requirement, and (Brinell hardness can reach HB280-350 after the tempering, Rockwell hardness can reach HRC30-36), tempering efficient height has improved production efficiency, (owing to increased trolley type annealing furnace low-temperaturetempering operational path, the low-temperaturetempering treatment process increases, the processing efficiency of mould band steel low-temperaturetempering improves), replace the special low temperature tempering stove with the chassis annealing furnace simultaneously, enlarged the use range of chassis annealing furnace.
Embodiment
Describe the specific embodiment of the present invention in detail below in conjunction with embodiment, but the specific embodiment of the present invention is not limited to following embodiment.
Embodiment
That present embodiment is handled is three of mould of plastics band steel P20, every block length 500cm, wide 100cm, thick 12cm, 6 tons of every weight.Chassis annealing furnace superintendent 12.5m, wide 3.7m, high 1.8m, power 60KW.
Present embodiment is a following sequential steps:
I is the mould band steel, the workpiece chassis annealing furnace of packing into, 100 ℃ of mould band steel initial temperatures;
The II intensification of switching on, per hour 100 ℃ of heat-up rates rose to 300 ℃ in two hours;
The III insulation
Mould band steel workpiece was 300 ℃ of insulations 3 hours;
IV heats up once more
The power that strengthens the chassis annealing furnace heats up once more to 60KW, per hour 100 ℃ of heat-up rates, and one and half are raised to 450 ℃;
V is incubated once more
Mould band steel workpiece was 450 ℃ of insulations 4 hours;
The VI cooling
Cut off the electricity supply,, cooled to 430 ℃ in 24 minutes with 50 ℃ speed per hour;
VII is incubated for the third time
430 ℃ of insulations 12 hours;
The VIII air cooling of coming out of the stove
Mould band steel workpiece is taken out the chassis annealing furnace, in air, naturally cool to normal temperature.
Claims (1)
1. the method for a mould band steel low-temperaturetempering, it comprises following sequential steps:
I is with the mould band steel workpiece chassis annealing furnace of packing into;
The II intensification of switching on, setting initial temperature is 100 ℃, per hour 100 ℃ ± 10 ℃ of heat-up rates rise to 300 ℃ ± 10 ℃;
The III insulation
Mould band steel workpiece was 300 ℃ ± 10 ℃ insulations 3 hours ± 20 minutes;
IV heats up once more
The power that strengthens the chassis annealing furnace heats up once more, and per hour 100 ℃ ± 10 ℃ of heat-up rates are raised to 450 ℃ ± 10 ℃;
V is incubated once more
Mould band steel workpiece was 450 ℃ ± 10 ℃ insulations 4 hours ± 20 minutes;
The VI cooling
Cut off the electricity supply, cool to 430 ℃ ± 10 ℃ with per hour 50 ℃ ± 10 ℃ speed;
VII is incubated for the third time
430 ℃ ± 10 ℃ insulations 12 hours ± 20 minutes;
The VIII air cooling of coming out of the stove
Mould band steel workpiece is taken out chassis annealing furnace, naturally cooling in air.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110020023A CN102051448B (en) | 2011-01-14 | 2011-01-14 | Method for low temperature tempering of die flat steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110020023A CN102051448B (en) | 2011-01-14 | 2011-01-14 | Method for low temperature tempering of die flat steel |
Publications (2)
| Publication Number | Publication Date |
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| CN102051448A true CN102051448A (en) | 2011-05-11 |
| CN102051448B CN102051448B (en) | 2012-10-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110020023A Active CN102051448B (en) | 2011-01-14 | 2011-01-14 | Method for low temperature tempering of die flat steel |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102489505A (en) * | 2011-12-13 | 2012-06-13 | 山西太钢不锈钢股份有限公司 | Cold-rolled steel strip and production method thereof, and anode plate material for electric dust removing device |
| CN103276173A (en) * | 2013-06-08 | 2013-09-04 | 山西太钢不锈钢股份有限公司 | Process method for rolling plate from 4Cr13 medium plate corrosion resistance mold steel |
| CN103451394A (en) * | 2013-08-11 | 2013-12-18 | 山西太钢不锈钢股份有限公司 | Heat treatment method for 30Cr13 bloomed die slabs |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101230442A (en) * | 2007-01-22 | 2008-07-30 | 宝山钢铁股份有限公司 | Low-alloy untempered steel for plastic mould frame steel and method for manufacturing same |
| CN101736139A (en) * | 2009-11-26 | 2010-06-16 | 上海大学 | Organization control method of large-size pre-hardening type plastic die steel module |
-
2011
- 2011-01-14 CN CN201110020023A patent/CN102051448B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101230442A (en) * | 2007-01-22 | 2008-07-30 | 宝山钢铁股份有限公司 | Low-alloy untempered steel for plastic mould frame steel and method for manufacturing same |
| CN101736139A (en) * | 2009-11-26 | 2010-06-16 | 上海大学 | Organization control method of large-size pre-hardening type plastic die steel module |
Non-Patent Citations (1)
| Title |
|---|
| 《热处理》 20080630 王庆亮 等 有限元模拟技术在塑料模具钢预硬化处理中的应用 第23卷, 第3期 2 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102489505A (en) * | 2011-12-13 | 2012-06-13 | 山西太钢不锈钢股份有限公司 | Cold-rolled steel strip and production method thereof, and anode plate material for electric dust removing device |
| CN102489505B (en) * | 2011-12-13 | 2014-11-26 | 山西太钢不锈钢股份有限公司 | Cold-rolled steel strip and production method thereof, and anode plate material for electric dust removing device |
| CN103276173A (en) * | 2013-06-08 | 2013-09-04 | 山西太钢不锈钢股份有限公司 | Process method for rolling plate from 4Cr13 medium plate corrosion resistance mold steel |
| CN103451394A (en) * | 2013-08-11 | 2013-12-18 | 山西太钢不锈钢股份有限公司 | Heat treatment method for 30Cr13 bloomed die slabs |
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| Publication number | Publication date |
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| CN102051448B (en) | 2012-10-03 |
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