CN110724806A - Destressing processing technology for reinforcing plate processing - Google Patents
Destressing processing technology for reinforcing plate processing Download PDFInfo
- Publication number
- CN110724806A CN110724806A CN201910987664.4A CN201910987664A CN110724806A CN 110724806 A CN110724806 A CN 110724806A CN 201910987664 A CN201910987664 A CN 201910987664A CN 110724806 A CN110724806 A CN 110724806A
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- Prior art keywords
- reinforcing plate
- temperature
- destressing
- processing
- blank material
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- 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, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous alloys
-
- 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, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
-
- 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, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
-
- 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, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0278—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips involving a particular surface treatment
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Forging (AREA)
Abstract
The invention discloses a destressing processing technology for processing a reinforcing plate, which comprises the following steps: performing rough machining treatment on a blank material, namely forging the blank material, repeatedly upsetting and drawing for at least 2-3 times during forging, cutting the forged blank material, and reserving machining allowance of about 3.5-5mm on each surface of the blank material to obtain a rough machined reinforcing plate; preheating the roughly processed reinforcing plate, namely firstly putting the reinforcing plate into an annealing furnace for preheating, raising the temperature to 200-300 ℃, and keeping the temperature for 20-30min to obtain the preheated reinforcing plate; according to the destressing processing technology for processing the reinforcing plate, the reasonable temperature and time are set in the destressing processing process, so that the reinforcing plate has good stability, the destressing of the reinforcing plate after pretreatment and tempering is reduced, the deformation of the reinforcing plate is reduced, the production quality is improved, and the stability of the quality of the produced product is guaranteed.
Description
Technical Field
The invention belongs to the technical field of reinforcing plate processing, and particularly relates to a destressing processing technology for reinforcing plate processing.
Background
The stress relief treatment is a heat treatment method, which is used for eliminating residual stress generated in the material after procedures of welding, quenching, installation and the like, the material is heated to a certain temperature by a heat treatment furnace or flame and is kept warm for a period of time, so that the residual stress in the material is relaxed, and the heat treatment effect is gradually known by people; the existing reinforcing plate has certain disadvantages in stress relief machining, the instability of the reinforcing plate can be caused when the set temperature is improper, the deformation phenomenon is easy to occur in the later use process, the size is unstable, the quality of accessories of the reinforcing plate cannot be guaranteed, meanwhile, the hardness of the reinforcing plate is reduced due to the improper time in the stress relief process, and inconvenience is brought to use.
Disclosure of Invention
The invention mainly aims to provide a destressing processing technology for processing a reinforcing plate, which can effectively solve the problems in the background technology.
In order to achieve the purpose, the invention adopts the technical scheme that:
a destressing processing technology for processing a reinforcing plate comprises the following steps:
firstly, forging a blank material, repeatedly upsetting and drawing for at least 2-3 times during forging, cutting the forged blank material, and reserving machining allowance of about 3.5-5mm on each surface of the blank material to obtain a roughly machined reinforcing plate;
step two, carrying out preheating treatment on the roughly processed reinforcing plate, namely firstly putting the reinforcing plate into an annealing furnace for preheating, raising the temperature to 200-300 ℃, and keeping the temperature for 20-30min to obtain the preheated reinforcing plate;
step three, carrying out heat treatment on the reinforcing plate subjected to the preheating treatment, putting the reinforcing plate into a heating furnace, setting the temperature to be 500-550 ℃, keeping the temperature for 60-120min, taking out the reinforcing plate after heat preservation, and naturally cooling the reinforcing plate to the normal temperature to obtain the reinforcing plate subjected to the heat treatment;
step four, performing fine processing treatment on the tempered reinforcing plate, performing primary grinding on the reinforcing plate by using 200-mesh dry sand paper according to the size, performing secondary grinding by using 600-mesh dry sand paper after uniform grinding until the luster is exposed, and enabling the roughness of the reinforcing plate to be smaller than Ra0.5 microns to obtain a finished reinforcing plate;
and step five, performing additional tempering treatment on the obtained finish-machined reinforcing plate, putting the finish-machined reinforcing plate into a tempering furnace, setting the temperature to be 250-300 ℃, keeping the temperature for 5-8h, taking out, and then performing air cooling to normal temperature to complete the stress removal process of the reinforcing plate, thereby finally obtaining the stress-removed reinforcing plate.
Preferably, the surface of the reinforcing plate after rough machining in the step one has a smooth finish Ra6.3.
Preferably, the temperature rise rate of the tempering furnace during heating is less than or equal to 80 ℃/h.
Preferably, in the forging process, the forging is carried out lightly when the temperature is more than 500 ℃ or less than 300 ℃; the temperature is 300 ℃ and 500 ℃ and then the mixture is repeatedly pumped.
Preferably, the difference between the maximum and minimum temperatures in the furnace should not exceed 50 ℃ during the holding.
Compared with the prior art, the invention has the following beneficial effects: the destressing method for processing the reinforcing plate is characterized in that the reinforcing plate is subjected to preheating treatment, heat treatment and tempering treatment, grinding stress of the reinforcing plate after processing is eliminated, stability of the reinforcing plate is guaranteed, deformation of the reinforcing plate cannot occur in the subsequent using process, stability of the size is guaranteed, product quality of the reinforcing plate is guaranteed, additional tempering treatment enables hardness of the reinforcing plate to be improved, reasonable temperature and heat preservation time are set, production efficiency of the reinforcing plate is improved on the premise that performance indexes are guaranteed, energy consumption in the technological process is reduced, the process is simple, operation is convenient, and the method has a good using prospect.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
Examples
When in stress relief processing, rough processing is carried out on the blank material, firstly, the blank material is forged and beaten, and in the forging and beating process, the blank material is lightly beaten when the temperature is more than 500 ℃ or less than 300 ℃; repeating forging at the temperature of 300-500 ℃, repeatedly upsetting and drawing for at least 2 times during forging, cutting the forged blank material, reserving machining allowance of about 3.5mm on each surface of the blank material, and obtaining the rough machined reinforcing plate with the surface finish of Ra6.3; then, carrying out preheating treatment on the roughly processed reinforcing plate, firstly, putting the reinforcing plate into an annealing furnace for preheating, raising the temperature to 200 ℃, and keeping the temperature for 20min to obtain a preheated reinforcing plate; secondly, carrying out heat treatment on the reinforcing plate subjected to the preheating treatment, putting the reinforcing plate into a heating furnace, setting the temperature to be 500 ℃, keeping the temperature for 80min, keeping the temperature until the difference between the highest temperature and the lowest temperature in the heating furnace does not exceed 50 ℃, taking out the reinforcing plate after heat preservation, and naturally cooling the reinforcing plate to the normal temperature to obtain the reinforcing plate subjected to heat treatment; performing fine processing treatment on the tempered reinforcing plate, performing primary grinding on the reinforcing plate by using 200-mesh dry sand paper according to the size, uniformly grinding, performing secondary grinding by using 600-mesh dry sand paper until the luster is exposed, and grinding to ensure that the roughness is less than Ra0.5 microns to obtain a finished reinforcing plate; finally, performing additional tempering treatment on the obtained reinforcing plate after finish machining, putting the reinforcing plate after finish machining into a tempering furnace, setting the temperature to be 280 ℃, setting the heating speed of the tempering furnace in heating to be less than or equal to 80 ℃/h, keeping the temperature for 6h, taking out, and then air-cooling to normal temperature to finish the stress removal process of the reinforcing plate;
and (3) detecting the mechanical property and other properties of some samples of the reinforcing plate after heat treatment, wherein the tensile strength of the reinforcing plate is 456Mpa, the yield strength is 710Mpa, the tensile strength is 865Mpa, and the dimensional qualification rate of the reinforcing plate is 97 percent.
Example 2
When in stress relief processing, rough processing is carried out on the blank material, firstly, the blank material is forged and beaten, and in the forging and beating process, the blank material is lightly beaten when the temperature is more than 500 ℃ or less than 300 ℃; repeating forging at the temperature of 300-500 ℃, repeatedly upsetting and drawing for at least 3 times during forging, cutting the forged blank material, reserving machining allowance of about 5mm on each surface of the blank material, and obtaining a rough machined reinforcing plate with the surface finish of Ra6.3; then carrying out preheating treatment on the roughly processed reinforcing plate, firstly putting the reinforcing plate into an annealing furnace for preheating, raising the temperature to 300 ℃, and keeping the temperature for 30min to obtain a preheated reinforcing plate; secondly, carrying out heat treatment on the reinforcing plate subjected to the preheating treatment, putting the reinforcing plate into a heating furnace, setting the temperature to be 550 ℃, keeping the temperature for 100min, keeping the temperature, keeping the difference between the highest temperature and the lowest temperature in the heating furnace to be not more than 50 ℃, taking out the reinforcing plate after heat preservation, and naturally cooling the reinforcing plate to the normal temperature to obtain the reinforcing plate subjected to heat treatment; performing fine processing treatment on the tempered reinforcing plate, performing primary grinding on the reinforcing plate by using 200-mesh dry sand paper according to the size, uniformly grinding, performing secondary grinding by using 600-mesh dry sand paper until the luster is exposed, and grinding to ensure that the roughness is less than Ra0.5 microns to obtain a finished reinforcing plate; finally, performing additional tempering treatment on the obtained reinforcing plate after finish machining, putting the reinforcing plate after finish machining into a tempering furnace, setting the temperature to be 300 ℃, setting the heating speed of the tempering furnace in heating to be less than or equal to 80 ℃/h, keeping the temperature for 8h, taking out, and then air-cooling to normal temperature to finish the stress removal process of the reinforcing plate;
and (3) detecting the mechanical property and other properties of some samples of the reinforcing plate after heat treatment, wherein the tensile strength of the reinforcing plate is 467Mpa, the yield strength is 726Mpa, the tensile strength is 880Mpa, and the dimensional qualification rate of the reinforcing plate is 98%.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (5)
1. The destressing processing technology for processing the reinforcing plate is characterized by comprising the following steps of:
firstly, forging a blank material, repeatedly upsetting and drawing for at least 2-3 times during forging, cutting the forged blank material, and reserving machining allowance of about 3.5-5mm on each surface of the blank material to obtain a roughly machined reinforcing plate;
step two, carrying out preheating treatment on the roughly processed reinforcing plate, namely firstly putting the reinforcing plate into an annealing furnace for preheating, raising the temperature to 200-300 ℃, and keeping the temperature for 20-30min to obtain the preheated reinforcing plate;
step three, carrying out heat treatment on the reinforcing plate subjected to the preheating treatment, putting the reinforcing plate into a heating furnace, setting the temperature to be 500-550 ℃, keeping the temperature for 60-120min, taking out the reinforcing plate after heat preservation, and naturally cooling the reinforcing plate to the normal temperature to obtain the reinforcing plate subjected to the heat treatment;
step four, performing fine processing treatment on the tempered reinforcing plate, performing primary grinding on the reinforcing plate by using 200-mesh dry sand paper according to the size, performing secondary grinding by using 600-mesh dry sand paper after uniform grinding until the luster is exposed, and enabling the roughness of the reinforcing plate to be smaller than Ra0.5 microns to obtain a finished reinforcing plate;
and step five, performing additional tempering treatment on the obtained finish-machined reinforcing plate, putting the finish-machined reinforcing plate into a tempering furnace, setting the temperature to be 250-300 ℃, keeping the temperature for 5-8h, taking out, and then performing air cooling to normal temperature to complete the stress removal process of the reinforcing plate, thereby finally obtaining the stress-removed reinforcing plate.
2. The destressing process of reinforcing plate processing according to claim 1, wherein: the surface of the reinforcing plate after rough machining in the step one has the smooth finish Ra6.3.
3. The destressing process of reinforcing plate processing according to claim 1, wherein: the temperature rising speed of the tempering furnace during heating is less than or equal to 80 ℃/h.
4. The destressing process of reinforcing plate processing according to claim 1, wherein: in the forging process, lightly forging at the temperature of more than 500 ℃ or at the temperature of less than 300 ℃; the temperature is 300 ℃ and 500 ℃ and then the mixture is repeatedly pumped.
5. The destressing process of reinforcing plate processing according to claim 1, wherein: when the temperature is kept, the difference between the highest temperature and the lowest temperature in the heating furnace is not more than 50 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910987664.4A CN110724806A (en) | 2019-10-17 | 2019-10-17 | Destressing processing technology for reinforcing plate processing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910987664.4A CN110724806A (en) | 2019-10-17 | 2019-10-17 | Destressing processing technology for reinforcing plate processing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110724806A true CN110724806A (en) | 2020-01-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910987664.4A Pending CN110724806A (en) | 2019-10-17 | 2019-10-17 | Destressing processing technology for reinforcing plate processing |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102230130A (en) * | 2011-06-29 | 2011-11-02 | 江苏环立板带轧辊有限公司 | Wear-resistant plastic die steel and preparation method thereof |
| JP2015005118A (en) * | 2013-06-20 | 2015-01-08 | 三津子 岡本 | Working platform for office |
| CN104805261A (en) * | 2015-04-02 | 2015-07-29 | 苏州市鑫渭阀门有限公司 | Destressing method of high-precision valve body |
| CN105986074A (en) * | 2015-01-30 | 2016-10-05 | 重庆沁煌机械制造有限公司 | Die steel processing technology |
| CN107866660A (en) * | 2016-09-24 | 2018-04-03 | 重庆向阳仪器有限公司 | A kind of die steel processing technology |
| CN109182699A (en) * | 2018-09-30 | 2019-01-11 | 中山市东特模具钢材制品有限公司 | A kind of processing technology of die steel |
| CN109576452A (en) * | 2019-01-28 | 2019-04-05 | 宁波久生模具科技有限公司 | A kind of novel die manufacturing process |
-
2019
- 2019-10-17 CN CN201910987664.4A patent/CN110724806A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102230130A (en) * | 2011-06-29 | 2011-11-02 | 江苏环立板带轧辊有限公司 | Wear-resistant plastic die steel and preparation method thereof |
| JP2015005118A (en) * | 2013-06-20 | 2015-01-08 | 三津子 岡本 | Working platform for office |
| CN105986074A (en) * | 2015-01-30 | 2016-10-05 | 重庆沁煌机械制造有限公司 | Die steel processing technology |
| CN104805261A (en) * | 2015-04-02 | 2015-07-29 | 苏州市鑫渭阀门有限公司 | Destressing method of high-precision valve body |
| CN107866660A (en) * | 2016-09-24 | 2018-04-03 | 重庆向阳仪器有限公司 | A kind of die steel processing technology |
| CN109182699A (en) * | 2018-09-30 | 2019-01-11 | 中山市东特模具钢材制品有限公司 | A kind of processing technology of die steel |
| CN109576452A (en) * | 2019-01-28 | 2019-04-05 | 宁波久生模具科技有限公司 | A kind of novel die manufacturing process |
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Application publication date: 20200124 |
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