CN111570690A - Manufacturing method for forging and forming crack prevention of duplex stainless steel F53 - Google Patents
Manufacturing method for forging and forming crack prevention of duplex stainless steel F53 Download PDFInfo
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- CN111570690A CN111570690A CN202010371601.9A CN202010371601A CN111570690A CN 111570690 A CN111570690 A CN 111570690A CN 202010371601 A CN202010371601 A CN 202010371601A CN 111570690 A CN111570690 A CN 111570690A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/008—Incremental forging
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J1/00—Preparing metal stock or similar ancillary operations prior, during or post forging, e.g. heating or cooling
- B21J1/06—Heating or cooling methods or arrangements specially adapted for performing forging or pressing operations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K29/00—Arrangements for heating or cooling during processing
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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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/78—Combined heat-treatments not provided for above
-
- 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
- C21D8/005—Modifying the physical properties by deformation combined with, or followed by, heat treatment of ferrous alloys
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Forging (AREA)
Abstract
The invention discloses a manufacturing method of a duplex stainless steel F53 forging forming crack prevention, which comprises the following steps: firstly, putting the steel ingot into a heating furnace, charging the steel ingot and avoiding flame direct injection, heating the steel ingot along with the furnace to less than 60 ℃/h, and preserving the heat for 4 hours when the temperature is between 300 and 350 ℃; secondly, heating the steel ingot with the temperature of 300-350 ℃ to 1020-1050 ℃ at the speed of 100 ℃/h, and preserving the heat for 20 hours; thirdly, raising the temperature of the steel ingot with the temperature of 1020-1050 ℃ to 1200 ℃ at the speed of 70-100 ℃/h, and preserving the temperature for 20 hours; fourthly, the steel ingot obtained in the third step is taken out and put into a forging machine for forging; fifthly, cracks appear on the outer surface in the forging process, and are immediately removed by gas cutting in a hot state; sixthly, placing the blank forged piece with the size into a heating furnace, continuously heating to 1070 ℃, preserving the temperature for 3 hours, and then carrying out solid solution, wherein the water temperature for solid solution is more than 40 ℃. The invention improves the forging efficiency and quality, prevents the surface cracks of the product, reduces the energy consumption and reduces the cost.
Description
Technical Field
The invention relates to a stainless steel production and processing method, in particular to a manufacturing method for forging and forming crack prevention of duplex stainless steel F53.
Background
When the duplex stainless steel F53 is forged, corner cracks and tensile cracks are easy to occur, and the quality is not good enough. If cracks appear on the outer surface during forging, the cracks need to be cleaned after the product is cooled, and then the forging is reheated. In this way, the efficiency is low and the energy consumption is high. And the forging efficiency is lower, and the energy consumption is higher.
Disclosure of Invention
The invention aims to provide a manufacturing method for forging and forming crack prevention of duplex stainless steel F53, which prevents cracking of a product, reduces energy consumption and improves forging efficiency by using the structure.
In order to achieve the purpose, the invention adopts the technical scheme that: a manufacturing method for forging and forming crack prevention of duplex stainless steel F53 comprises the following steps:
firstly, putting the steel ingot into a heating furnace, charging the steel ingot and avoiding flame direct injection, heating the steel ingot along with the furnace to less than 60 ℃/h, and preserving the heat for 4 hours when the temperature is between 300 and 350 ℃;
secondly, after preserving heat for 4 hours, heating the steel ingot with the temperature of 300-350 ℃ to 1020-1050 ℃ at the speed of 100 ℃/h, and preserving heat for 20 hours;
thirdly, raising the temperature of the steel ingot with the temperature of 1020-1050 ℃ to 1200 ℃ at the speed of 70-100 ℃/h, and preserving the temperature for 20 hours;
fourthly, the steel ingot obtained in the third step is taken out and placed on a forging machine, the steel ingot is lightly patted, rounded and chamfered by utilizing a forging head with an arc-shaped bottom, the steel ingot is straightened and upset, the single pressing amount of the forging head of the forging machine is less than 30mm, the time is kept for 2 seconds, the forging direction is controlled to be 1:1.5 gradually deformed, the steel ingot is rounded 1 time after pressing the product for 100 mm-150 mm each time, and the angular crack and the tensile crack are reduced;
fifthly, cracks appear on the outer surface in the forging process, and are immediately removed by gas cutting in a hot state;
sixthly, placing the blank forged piece with the size into a heating furnace, continuously heating to 1070 ℃, preserving the temperature for 3 hours, and then carrying out solid solution, wherein the water temperature for solid solution is more than 40 ℃.
In the technical scheme, in the step IV, in the process that the steel ingot is taken out of the heating furnace and placed on the forging machine, the temperature of the steel ingot is reduced, when the temperature of the steel ingot is reduced to 1150 ℃, forging is started, and the steel ingot is forged by installing a preset frequency; in the last step of forging, the forging temperature of the steel ingot needs to be more than or equal to 950 ℃.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:
1. according to the invention, through repeated heating and heat preservation, the performance of the product can be improved, the cracking of the product can be reduced during forging and pressing, and meanwhile, the product is directly removed by gas cutting after cracking, so that the forging efficiency and quality are effectively improved, and the energy consumption is reduced;
2. the initial forging temperature is 1150 ℃, and the temperature is 950 ℃ when the forging is finished, so that the crack phenomenon can be avoided, and the forging quality of the product is ensured.
Detailed Description
The invention is further described below with reference to the following examples:
the first embodiment is as follows: a manufacturing method for forging and forming crack prevention of duplex stainless steel F53 comprises the following steps:
firstly, putting the steel ingot into a heating furnace, charging the steel ingot and avoiding flame direct injection, heating the steel ingot along with the furnace to less than 60 ℃/h, and preserving the heat for 4 hours when the temperature is between 300 and 350 ℃;
secondly, after preserving heat for 4 hours, heating the steel ingot with the temperature of 300-350 ℃ to 1020-1050 ℃ at the speed of 100 ℃/h, and preserving heat for 20 hours;
thirdly, raising the temperature of the steel ingot with the temperature of 1020-1050 ℃ to 1200 ℃ at the speed of 70-100 ℃/h, and preserving the temperature for 20 hours;
fourthly, the steel ingot obtained in the third step is taken out and placed on a forging machine, the steel ingot is lightly patted, rounded and chamfered by utilizing a forging head with an arc-shaped bottom, the steel ingot is straightened and upset, the single pressing amount of the forging head of the forging machine is less than 30mm, the time is kept for 2 seconds, the forging direction is controlled to be 1:1.5 gradually deformed, the steel ingot is rounded 1 time after pressing the product for 100 mm-150 mm each time, and the angular crack and the tensile crack are reduced;
fifthly, cracks appear on the outer surface in the forging process, and are immediately removed by gas cutting in a hot state;
sixthly, placing the blank forged piece with the size into a heating furnace, continuously heating to 1070 ℃, preserving the temperature for 3 hours, and then carrying out solid solution, wherein the water temperature for solid solution is more than 40 ℃.
In the fourth step, in the process that the steel ingot is taken out of the heating furnace and placed on the forging machine, the temperature of the steel ingot is reduced, when the temperature of the steel ingot is reduced to 1150 ℃, forging is started, and a preset frequency is installed for forging; in the last step of forging, the forging temperature of the steel ingot needs to be more than or equal to 950 ℃.
In this example, the steel ingot was forged at 1150 ℃ and at 950 ℃ to further avoid cracking.
In the embodiment, the steel ingot is heated and insulated for multiple times, and the initial heating speed is low, so that the interior of the steel ingot can be fully heated, the forging performance of the steel ingot is ensured, and the generation of steel ingot cracks in the forging process is reduced.
In the conventional forging mode, if cracks occur on the outer surface in the forging process, the steel ingot needs to be treated after being cooled down, and the forging is reheated after the treatment is completed.
In addition, in the conventional structure, the product needs to be lengthened and chamfered by adopting a flat stirrup head, so that the surface of the product is easy to crack. In this embodiment, the forging and pressing in-process adopts the bottom to forge for curved forging head, has so both increased and has forged than, can effectually prevent surface cracking again, improves the quality of product.
Claims (2)
1. A manufacturing method for forging and forming crack prevention of duplex stainless steel F53 comprises the following steps:
firstly, putting the steel ingot into a heating furnace, charging the steel ingot and avoiding flame direct injection, heating the steel ingot along with the furnace to less than 60 ℃/h, and preserving the heat for 4 hours when the temperature is between 300 and 350 ℃;
secondly, after preserving heat for 4 hours, heating the steel ingot with the temperature of 300-350 ℃ to 1020-1050 ℃ at the speed of 100 ℃/h, and preserving heat for 20 hours;
thirdly, raising the temperature of the steel ingot with the temperature of 1020-1050 ℃ to 1200 ℃ at the speed of 70-100 ℃/h, and preserving the temperature for 20 hours;
fourthly, the steel ingot obtained in the third step is taken out and placed on a forging machine, the steel ingot is lightly patted, rounded and chamfered by utilizing a forging head with an arc-shaped bottom, the steel ingot is straightened and upset, the single pressing amount of the forging head of the forging machine is less than 30mm, the time is kept for 2 seconds, the forging direction is controlled to be 1:1.5 gradually deformed, the steel ingot is rounded 1 time after pressing the product for 100 mm-150 mm each time, and the angular crack and the tensile crack are reduced;
fifthly, cracks appear on the outer surface in the forging process, and are immediately removed by gas cutting in a hot state;
sixthly, placing the blank forged piece with the size into a heating furnace, continuously heating to 1070 ℃, preserving the temperature for 3 hours, and then carrying out solid solution, wherein the water temperature for solid solution is more than 40 ℃.
2. The method for manufacturing the duplex stainless steel F53 forging-forming crack prevention according to claim 1, wherein the method comprises the following steps: in the fourth step, in the process that the steel ingot is taken out of the heating furnace and placed on the forging machine, the temperature of the steel ingot is reduced, when the temperature of the steel ingot is reduced to 1150 ℃, forging is started, and a preset frequency is installed for forging; in the last step of forging, the forging temperature of the steel ingot needs to be more than or equal to 950 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010371601.9A CN111570690A (en) | 2020-05-06 | 2020-05-06 | Manufacturing method for forging and forming crack prevention of duplex stainless steel F53 |
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| CN202010371601.9A CN111570690A (en) | 2020-05-06 | 2020-05-06 | Manufacturing method for forging and forming crack prevention of duplex stainless steel F53 |
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| CN202010371601.9A Pending CN111570690A (en) | 2020-05-06 | 2020-05-06 | Manufacturing method for forging and forming crack prevention of duplex stainless steel F53 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114618971A (en) * | 2020-12-10 | 2022-06-14 | 山西宝龙达锻造股份有限公司 | Forging process of duplex stainless steel F55 |
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| CN104152818A (en) * | 2014-08-12 | 2014-11-19 | 昆明理工大学 | Duplex stainless steel and preparation method thereof |
| CN104294021A (en) * | 2014-10-24 | 2015-01-21 | 无锡市派克重型铸锻有限公司 | Duplex stainless steel forging and molding process |
| CN104493027A (en) * | 2014-10-24 | 2015-04-08 | 无锡市派克重型铸锻有限公司 | Technology for forging duplex stainless steel |
| CN106563751A (en) * | 2016-10-13 | 2017-04-19 | 四川远方高新装备零部件股份有限公司 | Nonmagnetic high-manganese austenitic stainless steel forging technology |
| CN109093040A (en) * | 2018-07-23 | 2018-12-28 | 江阴市澄东锻造有限公司 | A kind of flange forging method of two phase stainless steel F53 |
| CN111014544A (en) * | 2019-12-18 | 2020-04-17 | 张家港市亨通环形锻件制造有限公司 | Forging process of duplex stainless steel 2205 |
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2020
- 2020-05-06 CN CN202010371601.9A patent/CN111570690A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104152818A (en) * | 2014-08-12 | 2014-11-19 | 昆明理工大学 | Duplex stainless steel and preparation method thereof |
| CN104294021A (en) * | 2014-10-24 | 2015-01-21 | 无锡市派克重型铸锻有限公司 | Duplex stainless steel forging and molding process |
| CN104493027A (en) * | 2014-10-24 | 2015-04-08 | 无锡市派克重型铸锻有限公司 | Technology for forging duplex stainless steel |
| CN106563751A (en) * | 2016-10-13 | 2017-04-19 | 四川远方高新装备零部件股份有限公司 | Nonmagnetic high-manganese austenitic stainless steel forging technology |
| CN109093040A (en) * | 2018-07-23 | 2018-12-28 | 江阴市澄东锻造有限公司 | A kind of flange forging method of two phase stainless steel F53 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114618971A (en) * | 2020-12-10 | 2022-06-14 | 山西宝龙达锻造股份有限公司 | Forging process of duplex stainless steel F55 |
| CN114618971B (en) * | 2020-12-10 | 2024-03-12 | 山西宝龙达锻造股份有限公司 | Forging process of duplex stainless steel F55 |
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