CN102021294B - Thermal processing method of NAK80 steel plates - Google Patents
Thermal processing method of NAK80 steel plates Download PDFInfo
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- CN102021294B CN102021294B CN2010105902511A CN201010590251A CN102021294B CN 102021294 B CN102021294 B CN 102021294B CN 2010105902511 A CN2010105902511 A CN 2010105902511A CN 201010590251 A CN201010590251 A CN 201010590251A CN 102021294 B CN102021294 B CN 102021294B
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- steel plates
- cooling
- nak80
- room temperature
- thermal processing
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Abstract
The invention provides a thermal processing method of NAK80 steel plates. The method is characterized by comprising the following steps: controlling the final rolling temperature for rolling alloy steel plates at 860-880 DEG C; cooling to 500 DEG C by air; cooling to a room temperature in pile; returning into a furnace for heating to 510-530 DEG C; preserving heat for 6-8 hours; carrying out aging treatment; and naturally cooling to the room temperature. The method avoids the deformation of the steel plates and simplifies the process; besides, the method is low in carbon, energy saving, short in production period and high in production efficiency.
Description
Technical field
The invention belongs to sheet material heat treatment technics field in the steel alloy, be specifically related to sheet material heat treating method in a kind of NAK80 steel.
Background technology
At present, be to be employed in naturally cooling after the rolling completion → heat again → quench → timeliness to sheet material heat treating method in the NAK80 steel both at home and abroad.This method shortcoming be operation various, waste energy, do not meet the demand for development of low-carbon economy.
Summary of the invention
The object of the invention provides a kind of waste heat that utilizes after rolling, and steel plate is carried out the method for controlled chilling, can effectively overcome the shortcoming of prior art.
The present invention realizes like this; It is characterized in that finishing temperature with the rolled alloy steel is controlled at 870 ℃ ± 10 ℃, air cooling to 500 ℃ carries out cooling in heap (be about to the steel plate of polylith after rolling and be deposited in cooling together) to room temperature again; Melt down again and be heated to 520 ℃ ± 10 ℃; Be incubated 6 ~ 8 hours, carry out ageing treatment, → naturally cool to room temperature again.
Advantage of the present invention and positively effect are: 1.. can avoid in the prior art causing owing to quenching the steel plate deformed problem that the steel plate structural stress causes; 2.. technological process is simple, the brief production cycle, reduced production cost, by 3000 tons of calculating of YO, can reduce production costs 3,000,000 yuan.
Embodiment:
Producing 3 stove NAK80 steel with the Taiyuan Iron and Steel Co. Electric furnace steel making is example; Its production process is: the degassing of electrosmelting → LF stove refining → VD stove is handled → is molded into 7.2 tons of slab ingots → red and send breaking down → soaking → cogging (the cogging specification is 200mm * 1050mm) → annealing → cutting → correct grinding → heating → rolling → thermal treatment → check → friendship storehouse; Technology is example according to this; When being rolled technology; After finishing temperature is controlled at 870 ℃ ± 10 ℃, control by the inventive method, its result is three example case shown in the table 1.
Table 1
| Heat (batch) number | D1907269 | D1907224 | D10000384 |
| Steel plate thickness (mm) | 20 | 30 | 60 |
| Finishing temperature (℃) | 873 | 878 | 869 |
| Aging temp (℃) | 515 | 520 | 520 |
| Aging time (hour) | 6.5 | 7 | 7 |
| Steel plate hardness (HB) | 400 | 406 | 386 |
Product requirement hardness is that HB380～HB400 all conforms to quality requirements.
Claims (1)
1. sheet material heat treating method in the NAK80 steel is characterized in that the finishing temperature of sheet material in the rolling NAK80 steel is controlled at 870 ℃ ± 10 ℃, behind the air cooling to 500 ℃; Cooling in heap is to room temperature again, melts down then to be heated to 520 ℃ ± 10 ℃, is incubated 6 ~ 8 hours; Carry out ageing treatment, air cooling is to room temperature again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105902511A CN102021294B (en) | 2010-12-16 | 2010-12-16 | Thermal processing method of NAK80 steel plates |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105902511A CN102021294B (en) | 2010-12-16 | 2010-12-16 | Thermal processing method of NAK80 steel plates |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102021294A CN102021294A (en) | 2011-04-20 |
| CN102021294B true CN102021294B (en) | 2012-03-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105902511A Active CN102021294B (en) | 2010-12-16 | 2010-12-16 | Thermal processing method of NAK80 steel plates |
Country Status (1)
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| CN (1) | CN102021294B (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2840304B2 (en) * | 1989-07-26 | 1998-12-24 | マツダ株式会社 | Forging method |
| CN1218061C (en) * | 2002-11-25 | 2005-09-07 | 宝山钢铁股份有限公司 | Calcium processing vanadium-nitrogenium-titanium micro-alloying non-quenched and tempered steel and preparation technology thereof |
| CN100345982C (en) * | 2005-06-30 | 2007-10-31 | 宝山钢铁股份有限公司 | Prehardening treatment method of NAK80 mould steel |
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- 2010-12-16 CN CN2010105902511A patent/CN102021294B/en active Active
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| Publication number | Publication date |
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| CN102021294A (en) | 2011-04-20 |
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