CN115679243A - Manufacturing method of carbon steel plate - Google Patents
Manufacturing method of carbon steel plate Download PDFInfo
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- CN115679243A CN115679243A CN202211336098.9A CN202211336098A CN115679243A CN 115679243 A CN115679243 A CN 115679243A CN 202211336098 A CN202211336098 A CN 202211336098A CN 115679243 A CN115679243 A CN 115679243A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The invention relates to the technical field of steel heat treatment, in particular to a manufacturing method of a carbon steel plate.
Description
Technical Field
The invention relates to the technical field of manufacturing methods of carbon steel plates, in particular to a manufacturing method of a carbon steel plate.
Background
In order to ensure the mechanical property, the traditional quenched and tempered steel mainly adopts the chemical components of high-carbon high-alloy so as to ensure the hardenability of the quenched and tempered steel. However, such high-carbon high-alloy components deteriorate the weldability of steel, and the structure is often tempered martensite, tempered sorbite or the like, and has a high yield ratio (ReH/Rm can be 0.93 or more), and a low-temperature ductile-brittle transition temperature of-60 ℃ or more. With the continuous improvement of the market on the welding performance requirement of the medium plate steel plate, the chemical components of the quenched and tempered steel are also changed from high carbon content to low carbon content, because the carbon content is an important element of the welding crack sensitivity coefficient. The low-carbon quenched and tempered steel has a small welding crack sensitivity coefficient, but has the problem of poor hardenability in production.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a method for manufacturing a carbon steel plate.
In order to achieve the purpose, the invention adopts the following technical scheme:
the manufacturing method of the carbon steel plate comprises the following steps:
s1, stamping a steel plate, namely stamping a steel plate raw material into a steel plate blank;
s2, treating the surface of the blank, polishing the surface of the steel plate blank formed by punching, and removing oil stains and impurities on the surface of the steel plate blank;
s3, carburizing, namely heating a carburizing furnace to 880-900 ℃, sending the steel plate blank into the carburizing furnace to be heated after the temperature in the carburizing furnace is uniform, adding a carburizing agent when the steel plate blank is heated to 880-900 ℃, continuously heating to 900-940 ℃, and then adding the carburizing agent again;
s4, performing heat preservation treatment, namely performing heat preservation treatment on the steel plate blank in the process of adding the carburizing agent, wherein the heat preservation temperature is 920-940 ℃, and the heat preservation time is 4-6 hours;
s5, cooling, namely pre-cooling the steel plate blank subjected to heat preservation treatment, cooling to room temperature in a carburizing furnace at the speed of 30-35 ℃/min, and taking out from the carburizing furnace for later use;
s6, quenching treatment, namely reheating the steel plate blank cooled to room temperature to 850-900 ℃, straightening the steel plate blank, then carrying out oil cooling treatment in a quenching furnace, and cooling to 500-600 ℃ at the speed of 30-35 ℃/S to carry out primary quenching treatment;
and S7, quenching again, namely putting the steel plate blank subjected to primary quenching into a water tank for rapid water cooling to below 200 ℃, and then taking out the steel plate blank from the water tank for cooling to room temperature to finish the manufacturing of the carbon steel plate.
Preferably, the carburizing agent is added at a rate of 3 to 6ml/min in the first addition, and at a rate of 6 to 9ml/min in the second addition.
Preferably, the carburizing agent is a liquid carburizing agent formed by mixing kerosene and alcohol, wherein the volume ratio of the kerosene to the alcohol is 3:1.
the manufacturing method of the carbon steel plate provided by the invention has the beneficial effects that: the carbon steel plate prepared by performing sectional carburizing treatment and secondary quenching treatment on the steel plate blank has the advantages of uniform performance, high steel plate precision and better processability.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Example one
The manufacturing method of the carbon steel plate comprises the following steps:
s1, stamping a steel plate, namely stamping a steel plate raw material into a steel plate blank;
s2, treating the surface of the blank, polishing the surface of the steel plate blank formed by punching, and removing oil stains and impurities on the surface of the steel plate blank;
s3, carburizing, namely heating the carburizing furnace to 880 ℃, sending the steel plate blank into the carburizing furnace to be heated after the temperature in the carburizing furnace is uniform, adding a carburizing agent when the steel plate blank is heated to 880 ℃, adding the carburizing agent at the rate of 3ml/min, continuously heating to 900 ℃, adding the carburizing agent again, adding the carburizing agent at the rate of 6ml/min, wherein the carburizing agent is a liquid carburizing agent prepared by mixing liquid comprising kerosene and alcohol, and the volume ratio of the kerosene to the alcohol is 3:1;
s4, performing heat preservation treatment, namely performing heat preservation treatment on the steel plate blank in the process of adding the carburizing agent, wherein the heat preservation temperature is 920 ℃, and the heat preservation time is 4 hours;
s5, cooling, namely pre-cooling the steel plate blank subjected to heat preservation treatment, cooling to room temperature in a carburizing furnace at the speed of 30 ℃/min, and taking out the steel plate blank from the carburizing furnace for later use;
s6, quenching, namely reheating the steel plate blank cooled to room temperature to 850 ℃, straightening the steel plate blank, then performing oil cooling treatment in a quenching furnace, and cooling to 500 ℃ at the speed of 30 ℃/S for primary quenching treatment;
and S7, quenching again, namely putting the steel plate blank subjected to primary quenching into a water tank for rapid water cooling to below 200 ℃, and then taking out the steel plate blank from the water tank for cooling to room temperature to finish the manufacturing of the carbon steel plate.
Example two
The manufacturing method of the carbon steel plate comprises the following steps:
s1, stamping a steel plate, namely stamping a steel plate raw material into a steel plate blank;
s2, treating the surface of the blank, polishing the surface of the steel plate blank formed by punching, and removing oil stains and impurities on the surface of the steel plate blank;
s3, carburizing, namely heating the carburizing furnace to 885 ℃, sending the steel plate blank into the carburizing furnace to be heated after the temperature in the carburizing furnace is uniform, adding a carburizing agent when the steel plate blank is heated to 885 ℃, adding the carburizing agent at a rate of 4ml/min, continuously heating to 910 ℃, adding the carburizing agent again, adding the carburizing agent at a rate of 7ml/min, wherein the carburizing agent is a liquid carburizing agent prepared by mixing liquid comprising kerosene and alcohol, and the kerosene and alcohol are in a volume ratio of 3:1;
s4, performing heat preservation treatment, namely performing heat preservation treatment on the steel plate blank in the process of adding the carburizing agent, wherein the heat preservation temperature is 925 ℃, and the heat preservation time is 4.5 hours;
s5, cooling, namely pre-cooling the steel plate blank subjected to heat preservation treatment, cooling to room temperature in a carburizing furnace at the speed of 31 ℃/min, and taking out the steel plate blank from the carburizing furnace for later use;
s6, quenching, namely reheating the steel plate blank cooled to room temperature to 860 ℃, straightening the steel plate blank, then performing oil cooling treatment in a quenching furnace, and cooling to 530 ℃ at the speed of 31 ℃/S to perform primary quenching treatment;
and S7, quenching again, namely putting the steel plate blank subjected to primary quenching into a water tank for rapid water cooling to below 200 ℃, and then taking out the steel plate blank from the water tank for cooling to room temperature to finish the manufacturing of the carbon steel plate.
EXAMPLE III
The manufacturing method of the carbon steel plate comprises the following steps:
s1, stamping a steel plate, namely stamping a steel plate raw material into a steel plate blank;
s2, treating the surface of the blank, polishing the surface of the steel plate blank formed by punching, and removing oil stains and impurities on the surface of the steel plate blank;
s3, carburizing, namely heating the carburizing furnace to 890 ℃, sending the steel plate blank into the carburizing furnace to be heated after the temperature in the carburizing furnace is uniform, adding a carburizing agent when the steel plate blank is heated to 890 ℃, adding the carburizing agent at a rate of 5ml/min, adding the carburizing agent again after the steel plate blank is continuously heated to 920 ℃, adding the carburizing agent at a rate of 8ml/min, wherein the carburizing agent is a liquid carburizing agent prepared by mixing liquid comprising kerosene and alcohol, and the kerosene and alcohol are in a volume ratio of 3:1;
s4, performing heat preservation treatment, namely performing heat preservation treatment on the steel plate blank in the process of adding the carburizing agent, wherein the heat preservation temperature is 930 ℃, and the heat preservation time is 4-6 hours;
s5, cooling, namely pre-cooling the steel plate blank subjected to heat preservation treatment, cooling to room temperature in a carburizing furnace at a speed of 32 ℃/min, and taking out the steel plate blank from the carburizing furnace for later use;
s6, quenching, namely reheating the steel plate blank cooled to room temperature to 870 ℃, straightening the steel plate blank, then performing oil cooling treatment in a quenching furnace, and cooling to 560 ℃ at the speed of 32 ℃/S for primary quenching treatment;
and S7, quenching again, namely putting the steel plate blank subjected to primary quenching into a water tank for rapid water cooling to below 200 ℃, and then taking out the steel plate blank from the water tank for cooling to room temperature to finish the manufacturing of the carbon steel plate.
Example four
The manufacturing method of the carbon steel plate comprises the following steps:
s1, stamping a steel plate, namely stamping a steel plate raw material into a steel plate blank;
s2, treating the surface of the blank, polishing the surface of the steel plate blank formed by punching, and removing oil stains and impurities on the surface of the steel plate blank;
s3, carburizing, namely heating the carburizing furnace to 900 ℃, sending the steel plate blank into the carburizing furnace to be heated after the temperature in the carburizing furnace is uniform, adding a carburizing agent when the steel plate blank is heated to 900 ℃, adding the carburizing agent at the rate of 6ml/min, continuously heating to 940 ℃, adding the carburizing agent again, adding the carburizing agent at the rate of 9ml/min, wherein the carburizing agent is a liquid carburizing agent prepared by mixing liquid comprising kerosene and alcohol, and the volume ratio of the kerosene to the alcohol is 3:1;
s4, performing heat preservation treatment, namely performing heat preservation treatment on the steel plate blank in the process of adding the carburizing agent, wherein the heat preservation temperature is 940 ℃, and the heat preservation time is 6 hours;
s5, cooling, namely pre-cooling the steel plate blank subjected to heat preservation treatment, cooling to room temperature in a carburizing furnace at the speed of 35 ℃/min, and taking out the steel plate blank from the carburizing furnace for later use;
s6, quenching, namely reheating the steel plate blank cooled to room temperature to 900 ℃, straightening the steel plate blank, then performing oil cooling treatment in a quenching furnace, and cooling to 600 ℃ at the speed of 35 ℃/S to perform primary quenching treatment;
and S7, quenching again, namely putting the steel plate blank subjected to primary quenching into a water tank for rapid water cooling to below 200 ℃, and then taking out the steel plate blank from the water tank for cooling to room temperature to finish the manufacturing of the carbon steel plate.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical solutions of the present invention and the equivalent alternatives or modifications thereof within the technical scope of the present invention.
Claims (3)
1. The manufacturing method of the carbon steel plate is characterized by comprising the following steps:
s1, stamping a steel plate, namely stamping a steel plate raw material into a steel plate blank;
s2, performing surface treatment on the blank, namely polishing the surface of the steel plate blank subjected to stamping forming to remove oil stains and impurities on the surface of the steel plate blank;
s3, carburizing, namely heating a carburizing furnace to 880-900 ℃, sending the steel plate blank into the carburizing furnace to be heated after the temperature in the carburizing furnace is uniform, adding a carburizing agent when the steel plate blank is heated to 880-900 ℃, continuously heating to 900-940 ℃, and then adding the carburizing agent again;
s4, performing heat preservation treatment, namely performing heat preservation treatment on the steel plate blank in the process of adding the carburizing agent, wherein the heat preservation temperature is 920-940 ℃, and the heat preservation time is 4-6 hours;
s5, cooling, namely pre-cooling the steel plate blank subjected to heat preservation treatment, cooling to room temperature in a carburizing furnace at the speed of 30-35 ℃/min, and taking out from the carburizing furnace for later use;
s6, quenching, namely reheating the steel plate blank cooled to room temperature to 850-900 ℃, straightening the steel plate blank, then performing oil cooling treatment in a quenching furnace, and cooling to 500-600 ℃ at the speed of 30-35 ℃/S to perform primary quenching treatment;
and S7, quenching again, namely putting the steel plate blank subjected to primary quenching into a water tank for rapid water cooling to below 200 ℃, and then taking out the steel plate blank from the water tank for cooling to room temperature to finish the manufacturing of the carbon steel plate.
2. The method of claim 1, wherein the carburizing agent is added at a rate of 3 to 6ml/min in the first addition, and the carburizing agent is added at a rate of 6 to 9ml/min in the second addition.
3. The method of claim 2, wherein the carburizing agent is a liquid carburizing agent in which a liquid comprising kerosene and alcohol are mixed, and the volume ratio of the kerosene and the alcohol is 3:1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211336098.9A CN115679243A (en) | 2022-10-28 | 2022-10-28 | Manufacturing method of carbon steel plate |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211336098.9A CN115679243A (en) | 2022-10-28 | 2022-10-28 | Manufacturing method of carbon steel plate |
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| Publication Number | Publication Date |
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| CN115679243A true CN115679243A (en) | 2023-02-03 |
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| CN202211336098.9A Pending CN115679243A (en) | 2022-10-28 | 2022-10-28 | Manufacturing method of carbon steel plate |
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| CN (1) | CN115679243A (en) |
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- 2022-10-28 CN CN202211336098.9A patent/CN115679243A/en active Pending
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