CN112593160A - Low-carbon high-quality carbon structural steel for rigging and preparation method thereof - Google Patents
Low-carbon high-quality carbon structural steel for rigging and preparation method thereof Download PDFInfo
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- CN112593160A CN112593160A CN202011502085.5A CN202011502085A CN112593160A CN 112593160 A CN112593160 A CN 112593160A CN 202011502085 A CN202011502085 A CN 202011502085A CN 112593160 A CN112593160 A CN 112593160A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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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
- C21D8/005—Modifying the physical properties by deformation combined with, or followed by, heat treatment of ferrous alloys
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
Abstract
The invention discloses low-carbon high-quality carbon structural steel for a rigging, which comprises the following chemical components: 0.06-0.10% of C, Si: less than or equal to 0.20 percent, Mn: 0.30-0.34%, P: less than or equal to 0.017 percent, S: less than or equal to 0.022 percent, Al: 0.015-0.025%, and the balance Fe and inevitable residual elements. The invention has novel design, the rigging obtains high surface hardness, high wear resistance and fatigue strength after heat treatment by using the low-carbon high-quality carbon structural steel, and keeps the toughness of the core part, so that a workpiece can bear larger load.
Description
Technical Field
The invention relates to the technical field of metallurgy, in particular to low-carbon high-quality carbon structural steel for rigging and a preparation method thereof.
Background
The low-carbon high-quality carbon structural steel is widely applied to various important rigging connecting pieces due to low strength, good toughness, plasticity and weldability. The rigging connecting piece refers to stressed components between the connecting rigging and the rigging, between the rigging and a hoisted object and between the rigging and hoisting equipment, and mainly comprises a lifting hook, a lifting ring, a shackle, a hanging clamp and the like. The high-strength high-toughness high-strength steel wire rope has the characteristics of high strength, good toughness, compact structure, convenience in operation, reliability in use and the like. The rigging industry in China develops rapidly in recent years, and the rigging product is an important part required by industrial production and important engineering construction projects. The product is widely used in the fields of military industry, nuclear power, wind power, hydropower, shipbuilding, metallurgy, bridges, mines, aerospace, ocean engineering, transportation, ports and docks, mechanical manufacturing and the like.
The high-quality carbon structural steel is mainly characterized in that the C, Si content in the steel is ultra-low; high-quality carbon structural steel is widely used, and the production capacity of the steel is increased with the increasing market demand. Due to the special requirements of chemical components of steel, in the production process, in order to ensure the quality requirement of final molten steel, most enterprises adopt LF refining in the production process, but in the refining process, Si in the steel slag is reduced due to the refining reducing atmosphere, so that the finished product effect is influenced.
Disclosure of Invention
The invention aims to provide low-carbon high-quality carbon structural steel for rigging and a preparation method thereof, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
the low-carbon high-quality carbon structural steel for the rigging comprises the following chemical components: 0.06-0.10% of C, Si: less than or equal to 0.20 percent, Mn: 0.30-0.34%, P: less than or equal to 0.017 percent, S: less than or equal to 0.022 percent, Al: 0.015-0.025%, and the balance Fe and inevitable residual elements.
As a further scheme of the invention: the rigging is made of low-carbon high-quality carbon structural steel and comprises the following chemical components: 0.07-0.09% of C, Si: less than or equal to 0.20 percent, Mn: 0.32-0.33%, P: less than or equal to 0.017 percent, S: less than or equal to 0.022 percent, Al: 0.018-0022%, and the balance Fe and inevitable residual elements.
As a further scheme of the invention: the rigging is made of low-carbon high-quality carbon structural steel and comprises the following chemical components: 0.08% of C, Si: less than or equal to 0.20 percent, Mn: 0.33%, P: less than or equal to 0.017 percent, S: less than or equal to 0.022 percent, Al: 0.020% and the balance Fe and inevitable residual elements.
A preparation method of low-carbon high-quality carbon structural steel for rigging comprises the following steps:
s1, smelting: the raw material of the molten iron is molten iron, the percentage of the molten iron is not less than 45 percent, foam slag is produced in the whole smelting process, uniform decarburization is realized, good oxidation boiling is ensured, and the upward floating of impurities and gas in the steel is promoted; the coordinated tapping of the temperature and the components of the molten steel is ensured, and if the components at the end point are not proper, a cooling agent can be added in the blowing process for adjustment; adding steel core aluminum along with the steel tapping flow in the steel tapping process to perform pre-deoxidation;
s2, refining: refining the molten steel smelted in the step S1, controlling the slag alkalinity to be 4.0-9.0, and enhancing the refining of desulfurization operation;
s3, vacuum treatment: adding 130-150 Kg/furnace of ladle refining slag and 40 Kg/furnace of lime, adding, adjusting, performing vacuum degassing, controlling the vacuum degree to be less than 65Pa, keeping the vacuum degree for 10-18 min, adjusting argon, soft blowing for 10-15 min, and strictly keeping bare molten steel and large amount of argon stirring and cooling during soft argon blowing.
S4, pouring: the continuous casting billet is produced by adopting a 250X1500 end face, the molten steel is continuously cast by adopting an integral tundish, the continuous casting drawing speed is controlled according to 0.6m/min, and the specific water amount is as follows: 0.50L per kg, and were protected from secondary oxidation.
S5, segmentation cutting: adopting a continuous cutting machine to cut the semi-finished product molded by casting into equal length;
s6, secondary heating: placing the cut semi-finished product into a heating furnace for secondary heating, wherein the heating temperature is controlled to be 1000-1200 ℃, and preheating is realized;
s7, rolling: the process is divided into two stages, the first stage rolling temperature is controlled between 1200-1300 ℃, and the second stage rolling temperature is controlled between 820-880 ℃.
S8, cooling: and slowly cooling to room temperature after rolling to obtain the low-carbon high-quality carbon structural steel for the rigging.
As a further scheme of the invention: in the step S1, the tapping temperature is controlled between 1660 ℃ and 1680 ℃.
As a further scheme of the invention: in the step S1, the content of C at the molten steel end point is controlled to be less than 0.03-0.04%, the content of P is controlled to be less than 0.017%, and the content of S is controlled to be less than 0.022%.
As a further scheme of the invention: in step S3, the process temperature control is: the arrival temperature of the molten steel is controlled to be 1610-1625 ℃, and the departure temperature of the molten steel is controlled to be 1580-1595 ℃.
Compared with the prior art, the invention has the beneficial effects that: the invention has novel design, the rigging obtains high surface hardness, high wear resistance and fatigue strength after heat treatment by using the low-carbon high-quality carbon structural steel, and keeps the toughness of the core part, so that a workpiece can bear larger load.
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. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
A preparation method of low-carbon high-quality carbon structural steel for rigging comprises the following steps:
s1, smelting: the raw material entering the furnace is molten iron, the percentage of the molten iron is ensured to be not less than 45%, foam slag is produced in the whole smelting process, uniform decarburization is carried out, good oxidation boiling is ensured, inclusions and gas in steel are promoted to float upwards, and the tapping temperature is controlled to be 1660-1680 ℃; the content of C at the molten steel end point is controlled to be below 0.03-0.04%, the content of P is controlled to be below 0.017%, and the content of S is controlled to be below 0.022%; if the components at the end point are not proper, a cooling agent can be properly added in the blowing-in process for adjustment; adding steel core aluminum along with the steel tapping flow in the steel tapping process to perform pre-deoxidation;
s2, refining: refining the molten steel smelted in the step S1, controlling the slag alkalinity to be 4.0-9.0, and enhancing the refining of desulfurization operation;
s3, vacuum treatment: adding 130-150 Kg/furnace of ladle refining slag and 40 Kg/furnace of lime, adding, adjusting, performing vacuum degassing, controlling the vacuum degree to be less than 65Pa, keeping the vacuum degree for 10-18 min, adjusting argon, soft blowing for 10-15 min, and strictly keeping bare molten steel and large amount of argon stirring and cooling during soft argon blowing.
S4, pouring: the continuous casting billet is produced by adopting a 250X1500 end face, the molten steel is continuously cast by adopting an integral tundish, the continuous casting drawing speed is controlled according to 0.6m/min, and the specific water amount is as follows: 0.50L per kg, and were protected from secondary oxidation.
S5, segmentation cutting: adopting a continuous cutting machine to cut the semi-finished product molded by casting into equal length;
s6, secondary heating: placing the cut semi-finished product into a heating furnace for secondary heating, wherein the heating temperature is controlled to be 1000-1200 ℃, and preheating is realized;
s7, rolling: the process is divided into two stages, the first stage rolling temperature is controlled between 1200-1300 ℃, and the second stage rolling temperature is controlled between 820-880 ℃.
S8, cooling: and slowly cooling to room temperature after rolling to obtain the low-carbon high-quality carbon structural steel for the rigging.
In the embodiment of the present invention, in step S3, the process temperature is controlled as follows: the arrival temperature of the molten steel is controlled to be 1610-1625 ℃, and the departure temperature of the molten steel is controlled to be 1580-1595 ℃.
In the embodiment of the invention, the design is novel, the rigging obtains high surface hardness, high wear resistance and fatigue strength after being subjected to heat treatment by using the low-carbon high-quality carbon structural steel, the toughness of the core part is kept, and a workpiece can bear larger load.
Example one
In the embodiment of the invention, the low-carbon high-quality carbon structural steel for the rigging comprises the following chemical components in percentage by weight: 0.06% of C, Si: less than or equal to 0.20 percent, Mn: 0.34%, P: less than or equal to 0.017 percent, S: less than or equal to 0.022 percent, Al: 0.015% and the balance Fe and unavoidable residual elements.
Example two
In the embodiment of the invention, the low-carbon high-quality carbon structural steel for the rigging comprises the following chemical components in percentage by weight: 0.07% of C, Si: less than or equal to 0.20 percent, Mn: 0.33%, P: less than or equal to 0.017 percent, S: less than or equal to 0.022 percent, Al: 0.018% by weight, and the balance Fe and inevitable residual elements.
EXAMPLE III
In the embodiment of the invention, the low-carbon high-quality carbon structural steel for the rigging comprises the following chemical components in percentage by weight: 0.08% of C, Si: less than or equal to 0.20 percent, Mn: 0.33%, P: less than or equal to 0.017 percent, S: less than or equal to 0.022 percent, Al: 0.020% and the balance Fe and inevitable residual elements.
Example four
In the embodiment of the invention, the low-carbon high-quality carbon structural steel for the rigging comprises the following chemical components in percentage by weight: 0.09% of C, Si: less than or equal to 0.20 percent, Mn: 0.32%, P: less than or equal to 0.017 percent, S: less than or equal to 0.022 percent, Al: 0.022%, and the balance of Fe and inevitable residual elements.
EXAMPLE five
In the embodiment of the invention, the low-carbon high-quality carbon structural steel for the rigging comprises the following chemical components in percentage by weight: 0.10% of C, Si: less than or equal to 0.20 percent, Mn: 0.30%, P: less than or equal to 0.017 percent, S: less than or equal to 0.022 percent, Al: 0.025%, and the balance Fe and inevitable residual elements.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (7)
1. The low-carbon high-quality carbon structural steel for the rigging is characterized by comprising the following chemical components: 0.06-0.10% of C, Si: less than or equal to 0.20 percent, Mn: 0.30-0.34%, P: less than or equal to 0.017 percent, S: less than or equal to 0.022 percent, Al: 0.015-0.025%, and the balance Fe and inevitable residual elements.
2. The low-carbon high-quality carbon structural steel for rigging according to claim 1, wherein the chemical composition of the low-carbon high-quality carbon structural steel for rigging is: 0.07-0.09% of C, Si: less than or equal to 0.20 percent, Mn: 0.32-0.33%, P: less than or equal to 0.017 percent, S: less than or equal to 0.022 percent, Al: 0.018-0022%, and the balance Fe and inevitable residual elements.
3. The low-carbon high-quality carbon structural steel for rigging according to claim 2, wherein the chemical composition of the low-carbon high-quality carbon structural steel for rigging is: 0.08% of C, Si: less than or equal to 0.20 percent, Mn: 0.33%, P: less than or equal to 0.017 percent, S: less than or equal to 0.022 percent, Al: 0.020% and the balance Fe and inevitable residual elements.
4. A method for manufacturing a low carbon high quality carbon structural steel for rigging according to any one of claims 1 to 3, wherein the method for manufacturing the low carbon high quality carbon structural steel for rigging comprises the steps of:
s1, smelting: the raw material of the molten iron is molten iron, the percentage of the molten iron is not less than 45 percent, foam slag is produced in the whole smelting process, uniform decarburization is realized, good oxidation boiling is ensured, and the upward floating of impurities and gas in the steel is promoted; the coordinated tapping of the temperature and the components of the molten steel is ensured, and if the components at the end point are not proper, a cooling agent can be added in the blowing process for adjustment; adding steel core aluminum along with the steel tapping flow in the steel tapping process to perform pre-deoxidation;
s2, refining: refining the molten steel smelted in the step S1, controlling the slag alkalinity to be 4.0-9.0, and enhancing the refining of desulfurization operation;
s3, vacuum treatment: adding 130-150 Kg/furnace of ladle refining slag and 40 Kg/furnace of lime, adding, adjusting, performing vacuum degassing, controlling the vacuum degree to be less than 65Pa, keeping the vacuum degree for 10-18 min, adjusting argon, soft blowing for 10-15 min, and strictly keeping bare molten steel and large amount of argon stirring and cooling during soft argon blowing.
S4, pouring: the continuous casting billet is produced by adopting a 250X1500 end face, the molten steel is continuously cast by adopting an integral tundish, the continuous casting drawing speed is controlled according to 0.6m/min, and the specific water amount is as follows: 0.50L per kg, and were protected from secondary oxidation.
S5, segmentation cutting: adopting a continuous cutting machine to cut the semi-finished product molded by casting into equal length;
s6, secondary heating: placing the cut semi-finished product into a heating furnace for secondary heating, wherein the heating temperature is controlled to be 1000-1200 ℃, and preheating is realized;
s7, rolling: the process is divided into two stages, the first stage rolling temperature is controlled between 1200-1300 ℃, and the second stage rolling temperature is controlled between 820-880 ℃.
S8, cooling: and slowly cooling to room temperature after rolling to obtain the low-carbon high-quality carbon structural steel for the rigging.
5. The method for manufacturing a low-carbon high-quality carbon structural steel for rigging according to claim 4, wherein in the step S1, a tapping temperature is controlled to be 1660-1680 ℃.
6. The method for manufacturing a low-carbon high-quality carbon structural steel for rigging according to claim 4, wherein in the step S1, the C content at the molten steel end point is controlled to be less than 0.03-0.04%, the P content is controlled to be less than 0.017%, and the S content is controlled to be less than 0.022%.
7. The method for preparing a low-carbon high-quality carbon structural steel for rigging according to claim 4, wherein in the step S3, the process temperature is controlled as follows: the arrival temperature of the molten steel is controlled to be 1610-1625 ℃, and the departure temperature of the molten steel is controlled to be 1580-1595 ℃.
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| CN202011502085.5A CN112593160A (en) | 2020-12-17 | 2020-12-17 | Low-carbon high-quality carbon structural steel for rigging and preparation method thereof |
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Citations (5)
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|---|---|---|---|---|
| CN102041444A (en) * | 2010-12-21 | 2011-05-04 | 南阳汉冶特钢有限公司 | Low-carbon low-silicon high-quality carbon structural steel and production method thereof |
| CN102199725A (en) * | 2011-05-13 | 2011-09-28 | 莱芜钢铁集团有限公司 | Bridge structural steel and production method thereof |
| CN102409238A (en) * | 2011-06-28 | 2012-04-11 | 南阳汉冶特钢有限公司 | 42CrMo alloy constructional steel super-thick plate and production method thereof |
| CN106929622A (en) * | 2017-03-27 | 2017-07-07 | 武钢集团昆明钢铁股份有限公司 | A kind of preparation method of high-quality 40Cr structural alloy steel hot rolling wire rods |
| CN109536822A (en) * | 2018-12-25 | 2019-03-29 | 山东钢铁股份有限公司 | A kind of rigging low-carbon carbon constructional quality steel and preparation method thereof |
-
2020
- 2020-12-17 CN CN202011502085.5A patent/CN112593160A/en active Pending
Patent Citations (5)
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| CN102041444A (en) * | 2010-12-21 | 2011-05-04 | 南阳汉冶特钢有限公司 | Low-carbon low-silicon high-quality carbon structural steel and production method thereof |
| CN102199725A (en) * | 2011-05-13 | 2011-09-28 | 莱芜钢铁集团有限公司 | Bridge structural steel and production method thereof |
| CN102409238A (en) * | 2011-06-28 | 2012-04-11 | 南阳汉冶特钢有限公司 | 42CrMo alloy constructional steel super-thick plate and production method thereof |
| CN106929622A (en) * | 2017-03-27 | 2017-07-07 | 武钢集团昆明钢铁股份有限公司 | A kind of preparation method of high-quality 40Cr structural alloy steel hot rolling wire rods |
| CN109536822A (en) * | 2018-12-25 | 2019-03-29 | 山东钢铁股份有限公司 | A kind of rigging low-carbon carbon constructional quality steel and preparation method thereof |
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