CN102605147A - Method for carrying out normalizing heat treatment by using waste heat from forging of forged piece - Google Patents

Method for carrying out normalizing heat treatment by using waste heat from forging of forged piece Download PDF

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Publication number
CN102605147A
CN102605147A CN2012100886795A CN201210088679A CN102605147A CN 102605147 A CN102605147 A CN 102605147A CN 2012100886795 A CN2012100886795 A CN 2012100886795A CN 201210088679 A CN201210088679 A CN 201210088679A CN 102605147 A CN102605147 A CN 102605147A
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China
Prior art keywords
forging
temperature
forged piece
forged
steel
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Pending
Application number
CN2012100886795A
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Chinese (zh)
Inventor
殷勇锋
钱飞
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JIANGSU LINGFEI FORGING CO Ltd
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JIANGSU LINGFEI FORGING CO Ltd
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Priority to CN2012100886795A priority Critical patent/CN102605147A/en
Publication of CN102605147A publication Critical patent/CN102605147A/en
Pending legal-status Critical Current

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Abstract

The invention relates to a method for carrying out normalizing heat treatment by using the waste heat from the forging of a forged piece, which comprises the following steps: making the final forging temperature of the forged piece be higher than the final forging temperature of the steel of the forged piece by controlling the final deformation and the final forging temperature of the forged piece during forging, cooling the forged piece to 650-700 DEG C in air, feeding into a hot treatment furnace to uniform the temperature so that the inside temperature and the outside temperature of the forge piece are same, heating to the temperature of above AC3 or ACm 60-65 DEG C or higher of the steel, preserving the temperature for austenitizing fully, discharging out of the hot treatment furnace, and cooling to the room temperature at a certain cooling speed. The method is suitable for the forged pieces made of low-carbon steel, medium-carbon structural steel and various low-alloy structural steel and is simple. Due to the adoption of the method, the metallurgical structure and the mechanical properties of the forged piece can be guaranteed, a large amount of energy consumed for heating the forged piece can be saved, and the production efficiency can be improved.

Description

A kind of utilize forging after waste heat carry out the normalizing heat-treating methods
 
Technical field
The present invention relates to a kind of heat treating method, specifically is to utilize waste heat behind the forging to carry out the method for normalizing treatment in a kind of production process of forging.
Background technology
At present, in the production process of forging, forging is processed needs normalizing heat treatment technique after the forging behind the type.Method in common is put into process furnace then and is heated to design temperature for to be cooled to room temperature to forging at present, and insulation is come out of the stove by setting the speed of cooling cooling.By this technology, forging need consume very many energy.Can not adapt to current energy-saving and emission-reduction, the trend of low-carbon (LC) life.
Summary of the invention
Technical problem to be solved by this invention provides a kind of forging normalizing heat treating method of energy-saving and environmental protection.
Of the present invention a kind of utilize forging after waste heat carry out the normalizing heat-treating methods; It is characterized in that may further comprise the steps: through control forging last fiery forging deformation amount and the forged temperature of termination in forging process; Make forging stop the final forging temperature 20-30 ° of C that forged temperature is higher than this steel grade material; In air, be chilled to 650-700 ℃ soon, it is identical to send into heat treatment furnace samming to forging internal and external temperature again, is heated to above 30 ~ 60 ℃ of the Ac3 (or Acm) of this steel grade material then; After insulation reached complete austenitizing, the back of coming out of the stove was cooled to room temperature by certain speed of cooling.
Present method is applicable to soft steel, medium carbon structure iron and the made forging of various structural low.
The invention has the beneficial effects as follows: the forging waste heat that utilizes of the present invention is forged back normalizing heat treating method; Forging metallographic structure and mechanical property had both been guaranteed; Practiced thrift the energy that adds hot forging in a large number and consumed again, and method is simple, has improved production efficiency.
Description of drawings
Fig. 1 is thermal treatment process figure of the present invention.
Embodiment
Below in conjunction with accompanying drawing, describe specific embodiments of the present invention in detail.
Like Fig. 1; A kind ofly utilize waste heat normalizing heat-treating methods behind the forging: through the control forging in forging process last fiery forging deformation amount with stop forged temperature; Make forging stop the final forging temperature 20-30 ° of C that forged temperature is higher than this steel grade material; In air, be chilled to 650-700 ℃ soon, it is identical to send into heat treatment furnace samming to forging internal and external temperature again, is heated to Ac3 (or Acm) above 30 ~ 60 ℃ or the higher temperature of this steel grade material then; After insulation reached complete austenitizing, the back of coming out of the stove was cooled to room temperature by certain speed of cooling.
The above only is a preferred implementation of the present invention, should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention, can also make some improvement, and these improvement also should be regarded as protection scope of the present invention.

Claims (1)

  1. One kind utilize forging after waste heat carry out the normalizing heat-treating methods; It is characterized in that may further comprise the steps: through control forging last fiery forging deformation amount and the forged temperature of termination in forging process; Make forging stop the final forging temperature 20-30 ° of C that forged temperature is higher than this steel grade material; In air, be chilled to 650-700 ℃ soon, it is identical to send into heat treatment furnace samming to forging internal and external temperature again, is heated to Ac3 or Acm above 30 ~ 60 ℃ or the higher temperature of this steel grade material then; After insulation reached complete austenitizing, the back of coming out of the stove was cooled to room temperature by certain speed of cooling.
CN2012100886795A 2012-03-30 2012-03-30 Method for carrying out normalizing heat treatment by using waste heat from forging of forged piece Pending CN102605147A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2012100886795A CN102605147A (en) 2012-03-30 2012-03-30 Method for carrying out normalizing heat treatment by using waste heat from forging of forged piece

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2012100886795A CN102605147A (en) 2012-03-30 2012-03-30 Method for carrying out normalizing heat treatment by using waste heat from forging of forged piece

Publications (1)

Publication Number Publication Date
CN102605147A true CN102605147A (en) 2012-07-25

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103320584A (en) * 2013-06-05 2013-09-25 衡阳市鹏润锻造有限公司 Low-carbon alloy structural steel heat treatment method
CN105886717A (en) * 2016-04-30 2016-08-24 王中忞 Normalizing method for forging waste heat of steel
CN107058684A (en) * 2017-03-20 2017-08-18 天津钢管集团股份有限公司 A kind of Technology for Heating Processing after the rolling for 12Cr1MoVG Steel Tube Specials
CN107619912A (en) * 2016-07-15 2018-01-23 万向钱潮股份有限公司 Residual temperature normalizing process
CN109762975A (en) * 2019-02-14 2019-05-17 浙江来福谐波传动股份有限公司 A kind of heat treatment process more than strength steel forging molding process and positive annealed combination
CN113042667A (en) * 2020-12-25 2021-06-29 江苏大洋精锻有限公司 Warm forging operation process of steel forging
CN114921622A (en) * 2022-05-06 2022-08-19 万向钱潮股份有限公司 Closed forging and residual temperature normalizing process for automobile hub outer ring

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1900328A (en) * 2005-07-19 2007-01-24 辽宁五一八内燃机配件有限公司 Heat treatment process for large microalloyed medium carbon steel engine crankshaft
CN102080147A (en) * 2010-12-04 2011-06-01 江苏飞船股份有限公司 Process for forging cold working die and method for quenching at low temperature by using forging waste heat

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1900328A (en) * 2005-07-19 2007-01-24 辽宁五一八内燃机配件有限公司 Heat treatment process for large microalloyed medium carbon steel engine crankshaft
CN102080147A (en) * 2010-12-04 2011-06-01 江苏飞船股份有限公司 Process for forging cold working die and method for quenching at low temperature by using forging waste heat

Non-Patent Citations (4)

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Title
《材料热处理技术》 20101231 刘红军等 "8620H 齿轮锻件锻造余热正火工艺" 第169-170页 1 第39卷, 第14期 *
《辽宁工学院学报》 19940930 雷天同等 "20CrMnTi齿轮锻后余热正火的工艺试验及应用" 第6-10页 1 第14卷, 第3期 *
刘红军等: ""8620H 齿轮锻件锻造余热正火工艺"", 《材料热处理技术》 *
雷天同等: ""20CrMnTi齿轮锻后余热正火的工艺试验及应用"", 《辽宁工学院学报》 *

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103320584A (en) * 2013-06-05 2013-09-25 衡阳市鹏润锻造有限公司 Low-carbon alloy structural steel heat treatment method
CN103320584B (en) * 2013-06-05 2016-06-08 衡阳市鹏润锻造有限公司 The heat treating method of a kind of low-carbon alloy structural steel
CN105886717A (en) * 2016-04-30 2016-08-24 王中忞 Normalizing method for forging waste heat of steel
CN107619912A (en) * 2016-07-15 2018-01-23 万向钱潮股份有限公司 Residual temperature normalizing process
CN107058684A (en) * 2017-03-20 2017-08-18 天津钢管集团股份有限公司 A kind of Technology for Heating Processing after the rolling for 12Cr1MoVG Steel Tube Specials
CN107058684B (en) * 2017-03-20 2019-01-15 天津钢管集团股份有限公司 It is a kind of for 12Cr1MoVG Steel Tube Special rolling after heat treatment process
CN109762975A (en) * 2019-02-14 2019-05-17 浙江来福谐波传动股份有限公司 A kind of heat treatment process more than strength steel forging molding process and positive annealed combination
CN109762975B (en) * 2019-02-14 2021-05-25 浙江来福谐波传动股份有限公司 Forging forming process and forward annealing combined heat treatment process for super-strength steel
CN113042667A (en) * 2020-12-25 2021-06-29 江苏大洋精锻有限公司 Warm forging operation process of steel forging
CN114921622A (en) * 2022-05-06 2022-08-19 万向钱潮股份有限公司 Closed forging and residual temperature normalizing process for automobile hub outer ring

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Application publication date: 20120725