Production method of high-strength hot-rolled ribbed steel bar

Abstract

The invention provides a production method of a high-strength hot-rolled ribbed steel bar, and relates to the technical field of steel bar processing. The production method of the high-strength hot-rolled ribbed steel bar comprises the steps of raw material preparation, smelting continuous casting, hot rolling, cooling, ribbed processing, fixed-length cutting, packaging and warehousing, specifically, steel containing alloy elements such as chromium, nickel and manganese is selected, the raw materials are strictly screened and proportioned, steel with different sulfur and phosphorus contents can be selected according to different use environments and requirements, and the high-strength hot-rolled ribbed steel bar is obtained. And the content condition of alloy elements of the steel is known, so that proper steel is selected, and the sulfur and phosphorus contents of the steel are detected. Hot-rolled steel is scattered in the atmosphere to be naturally cooled to a certain degree, then the hot-rolled steel is forcibly cooled in the modes of water spraying, mist spraying and the like, the cooling speed is high and uniform, the uniform structure and performance are obtained by controlling the cooling speed, and the control precision directly influences the quality and performance of steel bar products.

Description

Technical Field

[0001] The invention relates to the technical field of steel bar processing, in particular to a production method of high-strength hot-rolled ribbed steel bars. Background Art

[0002] Hot-rolled ribbed steel bars (called rebar) are mainly used as reinforcement for reinforced concrete structures to improve the strength and deformation resistance of the structure and meet the requirements of structural bearing capacity and normal use. Rebar, as the main construction steel, is widely used in industrial and civil construction, railways, bridges, roads, hydropower, ports and other industry construction projects.

[0003] As the use of steel bars increases significantly year by year, the safety of building structures has attracted widespread attention from the society. The construction industry has higher and higher requirements on the performance of steel bars. The key to ensuring the safety of buildings is to improve the strength and comprehensive performance of steel bars. At present, my country's reinforced concrete structures mainly use 400MPa and 500MPa grade hot-rolled ribbed steel bars. The strength of the steel is relatively low, resulting in a low structural bearing capacity. Therefore, the present invention Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a method for producing high-strength hot-rolled ribbed steel bars, which solves the problem that the bearing capacity of the structure is affected during subsequent use due to insufficient strength of the hot-rolled ribbed steel bars.

[0005] To achieve the above object, the present invention is implemented by the following technical scheme: A production method of high-strength hot-rolled ribbed steel bars, including raw material preparation, smelting and continuous casting, hot rolling, cooling, ribbed processing, cut-to-length cutting, packaging and warehousing, characterized in that it includes the following steps:

[0006] S1, select steel containing alloy elements such as chromium, nickel, manganese, etc., and strictly screen and proportion the raw materials.

[0007] The selection of steel raw materials mainly involves the following steps:

[0008] (1) Determine the use environment and requirements: According to different use environments and requirements, steel with different sulfur and phosphorus contents can be selected to meet different needs;

[0009] (2) Understand the sulfur and phosphorus content of steel: Before purchasing steel, you can ask the supplier about the content of alloy elements so as to choose the appropriate steel;

[0010] (3) Detecting the sulfur and phosphorus content of steel: By detecting the sulfur and phosphorus content of steel, we can understand its quality and select high-quality steel;

[0011] (4) Consider other performance indicators: For example, if used under high temperature conditions, the material of the parts must have certain high temperature strength and oxidation resistance; chemical equipment requires the material to have high corrosion resistance; some instrument parts require the material to have electromagnetic properties, etc.

[0012] (5) Optimize material selection: Comprehensively consider material cost, molding process, material performance, reliability of use, etc., and use optimization methods to select the most suitable materials. If necessary, the selected materials must be tested and put into production before verification or adjustment;

[0013] The proportioning of steel raw materials mainly involves the following steps:

[0014] (1) Low carbon steel: The carbon content is generally between 0.008% and 0.25%. It is mainly used to manufacture structural parts and containers that require good plasticity and welding properties.

[0015] (2) Medium carbon steel: The carbon content is generally between 0.25% and 0.6%. It has good strength and plasticity and can be used to manufacture structural parts and cutting tools that require higher strength.

[0016] (3) High carbon steel: The carbon content is generally between 0.6% and 1.7%. It has high hardness and good wear resistance. It is mainly used to manufacture tools, measuring tools and cutting tools.

[0017] (4) Alloy steel: Add a certain amount of alloy elements, such as chromium, nickel, tungsten, etc., to carbon steel to improve the mechanical properties and corrosion resistance of the steel, such as stainless steel, heat-resistant steel, wear-resistant steel, etc.

[0018] (5) Cast steel: The carbon content is generally between 0.1% and 2.0%, and it is used to manufacture castings that require higher strength and toughness.

[0019] When formulating steel raw materials, the influence of other elements also needs to be considered, such as sulfur, phosphorus, silicon, manganese, etc. The content and ratio of these elements will affect the performance and quality of steel. Therefore, the composition of raw materials and process parameters need to be strictly controlled during the production process to ensure that the performance and quality of the final product meet the requirements.

[0020] S2, the steel raw materials are sent into a heating furnace at a temperature of 1200-1300°C for melting, and then the molten liquid steel is forced to condense through the continuous casting machine, and finally cut to a fixed length according to demand to obtain the ingot.

[0021] S3, when the steel is heated to a temperature of 1200-1300°C, the steel is roughly rolled for 60-100 seconds at a rolling speed of 1-1.5 m / s, then intermediate rolled for 50-120 seconds at a rolling speed of 4-6.5 m / s, and finally fine rolled for 60-130 seconds at a rolling speed of 6.5-15 m / s.

[0022] S4. The cooling of steel after hot rolling adopts a combination of natural cooling and controlled cooling. The hot-rolled steel is scattered in the atmosphere for a certain degree of natural cooling, and then forced to cool the hot-rolled steel by spraying water, mist, etc. The cooling speed is fast and uniform. Uniform structure and performance are obtained by controlling the cooling speed. The control accuracy directly affects the quality and performance of steel products.

[0023] Preferably, the reinforcing steel is processed with ribs after cooling, and a relatively high-quality steel billet is selected for cooling and forming, and the steel billet is cut according to the required specifications, and then straightened by a straightening machine to ensure that the length and diameter of the steel bar meet the design requirements.

[0024] Preferably, the cooling and forming temperature of the steel bar is controlled at 800-1000°C, and the roller spacing of the straightening machine for straightening the steel bar billet needs to be reasonably adjusted according to the steel bar diameter. Generally, the roller center distance is 1mm-2mm larger than the steel bar diameter.

[0025] Preferably, the straightened steel bars are fed into a rolling mill, and through multiple passes of rolling and embossing, the outer shape of the steel bars is changed into a shape with ribs. The steel bars after rolling and embossing are then cold treated, mainly by controlling the cold rolling speed and temperature, so that the mechanical properties of the steel bars are further improved.

[0026] Preferably, the temperature range controlled during the steel bar embossing process is 650-900°C.

[0027] Preferably, the steel bar billet is cut to length after ribbed processing, the original steel bar billet is cut into steel bars of specific length and specification, the steel bar billet is measured to determine the specific length to be cut, and then marks are made on the billet to indicate the cutting position.

[0028] Preferably, the steel bar billet is fixed in a stable position using an appropriate clamp or machine to ensure that the billet does not move during the cutting process, and the steel bar billet is cut using a cutting machine. This usually involves the use of a flame or saw blade to cut the billet.

[0029] Preferably, after the steel bar billet is cut, the flatness and size of the cut are checked to ensure that they meet the requirements. If necessary, the cut can also be flattened. Finally, the cut steel bars are sorted, packaged and transported to the required construction site.

[0030] The present invention provides a method for producing high-strength hot-rolled ribbed steel bars. It has the following beneficial effects:

[0031] 1. The present invention adopts a combination of natural cooling and controlled cooling to cool the steel after hot rolling. The hot-rolled steel is scattered in the atmosphere for a certain degree of natural cooling, and then forced to cool the hot-rolled steel by spraying water, mist, etc. The cooling speed is fast and uniform. Uniform structure and performance are obtained by controlling the cooling speed. The control accuracy directly affects the quality and performance of the steel bar product.

[0032] 2. The present invention cuts the original steel bar billet into steel bars of specific length and specification after ribbed processing, measures the steel bar billet to determine the specific length to be cut, and then marks the billet to indicate the cutting position, thereby ensuring the stability of hot-rolled steel bar cutting production. DETAILED DESCRIPTION

[0033] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] Embodiment 1:

[0035] The embodiment of the present invention provides a production method of high-strength hot-rolled ribbed steel bars, including raw material preparation, smelting and continuous casting, hot rolling, cooling, ribbed processing, cut-to-length cutting, packaging and warehousing, characterized in that it includes the following steps:

[0036] S1, select steel containing alloy elements such as chromium, nickel, manganese, etc., and strictly screen and proportion the raw materials.

[0037] The selection of steel raw materials mainly involves the following steps:

[0038] (1) Determine the use environment and requirements: According to different use environments and requirements, steel with different sulfur and phosphorus contents can be selected to meet different needs;

[0039] (2) Understand the sulfur and phosphorus content of steel: Before purchasing steel, you can ask the supplier about the content of alloy elements so as to choose the appropriate steel;

[0040] (3) Detecting the sulfur and phosphorus content of steel: By detecting the sulfur and phosphorus content of steel, we can understand its quality and select high-quality steel;

[0041] (4) Consider other performance indicators: For example, if used under high temperature conditions, the material of the parts must have certain high temperature strength and oxidation resistance; chemical equipment requires the material to have high corrosion resistance; some instrument parts require the material to have electromagnetic properties, etc.

[0042] (5) Optimize material selection: Comprehensively consider material cost, molding process, material performance, reliability of use, etc., and use optimization methods to select the most suitable materials. If necessary, the selected materials must be tested and put into production before verification or adjustment;

[0043] The proportioning of steel raw materials mainly involves the following steps:

[0044] (1) Low carbon steel: The carbon content is generally between 0.008% and 0.25%. It is mainly used to manufacture structural parts and containers that require good plasticity and welding properties.

[0045] (2) Medium carbon steel: The carbon content is generally between 0.25% and 0.6%. It has good strength and plasticity and can be used to manufacture structural parts and cutting tools that require higher strength.

[0046] (3) High carbon steel: The carbon content is generally between 0.6% and 1.7%. It has high hardness and good wear resistance. It is mainly used to manufacture tools, measuring tools and cutting tools.

[0047] (4) Alloy steel: Add a certain amount of alloy elements, such as chromium, nickel, tungsten, etc., to carbon steel to improve the mechanical properties and corrosion resistance of the steel, such as stainless steel, heat-resistant steel, wear-resistant steel, etc.

[0048] (5) Cast steel: The carbon content is generally between 0.1% and 2.0%, and it is used to manufacture castings that require higher strength and toughness.

[0049] When formulating steel raw materials, the influence of other elements also needs to be considered, such as sulfur, phosphorus, silicon, manganese, etc. The content and ratio of these elements will affect the performance and quality of steel. Therefore, the composition of raw materials and process parameters need to be strictly controlled during the production process to ensure that the performance and quality of the final product meet the requirements.

[0050] S2, the steel raw materials are sent into a heating furnace at a temperature of 1200-1300°C for melting, and then the molten liquid steel is forced to condense through the continuous casting machine, and finally cut to a fixed length according to demand to obtain the ingot.

[0051] S3, when the steel is heated to a temperature of 1200-1300°C, the steel is roughly rolled for 60-100 seconds at a rolling speed of 1-1.5 m / s, then intermediate rolled for 50-120 seconds at a rolling speed of 4-6.5 m / s, and finally fine rolled for 60-130 seconds at a rolling speed of 6.5-15 m / s.

[0052] S4. The cooling of steel after hot rolling adopts a combination of natural cooling and controlled cooling. The hot-rolled steel is scattered in the atmosphere for a certain degree of natural cooling, and then forced to cool the hot-rolled steel by spraying water, mist, etc. The cooling speed is fast and uniform. Uniform structure and performance are obtained by controlling the cooling speed. The control accuracy directly affects the quality and performance of steel products.

[0053] To further explain, the rebar steel is processed with ribs after cooling, and the steel billets with better cooling and forming quality are selected. The steel billets are cut according to the required specifications and then straightened using a straightening machine to ensure that the length and diameter of the rebar meet the design requirements.

[0054] It is further explained that the temperature of the cooling and forming of the steel bar is controlled at 800-1000°C. The roller spacing of the straightening machine for straightening the steel bar billet needs to be reasonably adjusted according to the diameter of the steel bar. Generally, the center distance of the rollers should be 1mm-2mm larger than the diameter of the steel bar.

[0055] To further explain, the straightened steel bars are fed into the rolling mill, and through multiple passes of rolling and embossing, the appearance of the steel bars is changed into a ribbed shape. The steel bars after rolling and embossing are then cold treated, mainly by controlling the cold rolling speed and temperature, so that the mechanical properties of the steel bars are further improved.

[0056] To further explain, the temperature range controlled during the steel bar embossing process is 650-900°C.

[0057] To explain further, the rebar billet is cut to length after rib processing, the original rebar billet is cut into steel bars of specific length and specifications, the rebar billet is measured to determine the specific length to be cut, and then marks are made on the billet to indicate the cutting location.

[0058] Explaining further, the steel billet is fixed in a stable position using a suitable clamp or machine to ensure that the billet does not move during the cutting process, and the steel billet is cut using a cutting machine. This usually involves the use of a flame or a saw blade to cut through the billet.

[0059] Further explanation, after the steel bar billet is cut, the flatness and size of the cut are checked to ensure that they meet the requirements. If necessary, the cut can also be flattened. Finally, the cut steel bars are sorted, packaged and transported to the required construction site.

[0060] Embodiment 2:

[0061] The embodiment of the present invention provides a production method of high-strength hot-rolled ribbed steel bars, including raw material preparation, smelting and continuous casting, hot rolling, cooling, ribbed processing, cut-to-length cutting, packaging and warehousing, characterized in that it includes the following steps:

[0062] S1, select steel containing alloy elements such as chromium, nickel, manganese, etc., and strictly screen and proportion the raw materials.

[0063] The selection of steel raw materials mainly involves the following steps:

[0064] (1) Determine the use environment and requirements: According to different use environments and requirements, steel with different sulfur and phosphorus contents can be selected to meet different needs;

[0065] (2) Understand the sulfur and phosphorus content of steel: Before purchasing steel, you can ask the supplier about the content of alloy elements so as to choose the appropriate steel;

[0066] (3) Detecting the sulfur and phosphorus content of steel: By detecting the sulfur and phosphorus content of steel, we can understand its quality and select high-quality steel;

[0067] (4) Consider other performance indicators: For example, if used under high temperature conditions, the material of the parts must have certain high temperature strength and oxidation resistance; chemical equipment requires the material to have high corrosion resistance; some instrument parts require the material to have electromagnetic properties, etc.

[0068] (5) Optimize material selection: Comprehensively consider material cost, molding process, material performance, reliability of use, etc., and use optimization methods to select the most suitable materials. If necessary, the selected materials must be tested and put into production before verification or adjustment;

[0069] The proportioning of steel raw materials mainly involves the following steps:

[0070] (1) Low carbon steel: The carbon content is generally between 0.008% and 0.25%. It is mainly used to manufacture structural parts and containers that require good plasticity and welding properties.

[0071] (2) Medium carbon steel: The carbon content is generally between 0.25% and 0.6%. It has good strength and plasticity and can be used to manufacture structural parts and cutting tools that require higher strength.

[0072] (3) High carbon steel: The carbon content is generally between 0.6% and 1.7%. It has high hardness and good wear resistance. It is mainly used to manufacture tools, measuring tools and cutting tools.

[0073] (4) Alloy steel: Add a certain amount of alloy elements, such as chromium, nickel, tungsten, etc., to carbon steel to improve the mechanical properties and corrosion resistance of the steel, such as stainless steel, heat-resistant steel, wear-resistant steel, etc.

[0074] (5) Cast steel: The carbon content is generally between 0.1% and 2.0%, and it is used to manufacture castings that require higher strength and toughness.

[0075] When formulating steel raw materials, the influence of other elements also needs to be considered, such as sulfur, phosphorus, silicon, manganese, etc. The content and ratio of these elements will affect the performance and quality of steel. Therefore, the composition of raw materials and process parameters need to be strictly controlled during the production process to ensure that the performance and quality of the final product meet the requirements.

[0076] S2, the steel raw materials are sent into a heating furnace at a temperature of 1350-1500°C for melting, and then the molten liquid steel is forced to condense through the continuous casting machine, and finally cut to a fixed length according to demand to obtain the ingot.

[0077] S3, when the steel is heated to a temperature of 1350-1500°C, rough rolling is performed for 60-100 seconds at a rolling speed of 1-1.5 m / s, intermediate rolling is performed for 55-130 seconds at a rolling speed of 4-6.5 m / s, and finally finish rolling is performed for 70-110 seconds at a rolling speed of 6.5-15 m / s.

[0078] S4. The cooling of steel after hot rolling adopts a combination of natural cooling and controlled cooling. The hot-rolled steel is scattered in the atmosphere for a certain degree of natural cooling, and then forced to cool the hot-rolled steel by spraying water, mist, etc. The cooling speed is fast and uniform. Uniform structure and performance are obtained by controlling the cooling speed. The control accuracy directly affects the quality and performance of steel products.

[0079] To further explain, the rebar steel is processed with ribs after cooling, and the steel billets with better cooling and forming quality are selected. The steel billets are cut according to the required specifications and then straightened using a straightening machine to ensure that the length and diameter of the rebar meet the design requirements.

[0080] It is further explained that the temperature of the cooling and forming of the steel bar is controlled at 800-900°C. The roller spacing set by the straightening machine for straightening the steel bar billet needs to be reasonably adjusted according to the diameter of the steel bar. Generally, the center distance of the rollers should be 1mm-2mm larger than the diameter of the steel bar.

[0081] To further explain, the straightened steel bars are fed into the rolling mill, and through multiple passes of rolling and embossing, the appearance of the steel bars is changed into a ribbed shape. The steel bars after rolling and embossing are then cold treated, mainly by controlling the cold rolling speed and temperature, so that the mechanical properties of the steel bars are further improved.

[0082] To further explain, the temperature range controlled during the steel bar embossing process is 600-800°C.

[0083] To explain further, the rebar billet is cut to length after rib processing, the original rebar billet is cut into steel bars of specific length and specifications, the rebar billet is measured to determine the specific length to be cut, and then marks are made on the billet to indicate the cutting location.

[0084] Explaining further, the steel billet is fixed in a stable position using a suitable clamp or machine to ensure that the billet does not move during the cutting process, and the steel billet is cut using a cutting machine. This usually involves the use of a flame or a saw blade to cut through the billet.

[0085] Further explanation, after the steel bar billet is cut, the flatness and size of the cut are checked to ensure that they meet the requirements. If necessary, the cut can also be flattened. Finally, the cut steel bars are sorted, packaged and transported to the required construction site.

[0086] Embodiment three:

[0087] The embodiment of the present invention provides a production method of high-strength hot-rolled ribbed steel bars, including raw material preparation, smelting and continuous casting, hot rolling, cooling, ribbed processing, cut-to-length cutting, packaging and warehousing, characterized in that it includes the following steps:

[0088] S1, select steel containing alloy elements such as chromium, nickel, manganese, etc., and strictly screen and proportion the raw materials.

[0089] The selection of steel raw materials mainly involves the following steps:

[0090] (1) Determine the use environment and requirements: According to different use environments and requirements, steel with different sulfur and phosphorus contents can be selected to meet different needs;

[0091] (2) Understand the sulfur and phosphorus content of steel: Before purchasing steel, you can ask the supplier about the content of alloy elements so as to choose the appropriate steel;

[0092] (3) Detecting the sulfur and phosphorus content of steel: By detecting the sulfur and phosphorus content of steel, we can understand its quality and select high-quality steel;

[0093] (4) Consider other performance indicators: For example, if used under high temperature conditions, the material of the parts must have certain high temperature strength and oxidation resistance; chemical equipment requires the material to have high corrosion resistance; some instrument parts require the material to have electromagnetic properties, etc.

[0094] (5) Optimize material selection: Comprehensively consider material cost, molding process, material performance, reliability of use, etc., and use optimization methods to select the most suitable materials. If necessary, the selected materials must be tested and put into production before verification or adjustment;

[0095] The proportioning of steel raw materials mainly involves the following steps:

[0096] (1) Low carbon steel: The carbon content is generally between 0.008% and 0.25%. It is mainly used to manufacture structural parts and containers that require good plasticity and welding properties.

[0097] (2) Medium carbon steel: The carbon content is generally between 0.25% and 0.6%. It has good strength and plasticity and can be used to manufacture structural parts and cutting tools that require higher strength.

[0098] (3) High carbon steel: The carbon content is generally between 0.6% and 1.7%. It has high hardness and good wear resistance. It is mainly used to manufacture tools, measuring tools and cutting tools.

[0099] (4) Alloy steel: Add a certain amount of alloy elements, such as chromium, nickel, tungsten, etc., to carbon steel to improve the mechanical properties and corrosion resistance of the steel, such as stainless steel, heat-resistant steel, wear-resistant steel, etc.

[0100] (5) Cast steel: The carbon content is generally between 0.1% and 2.0%, and it is used to manufacture castings that require higher strength and toughness.

[0101] When formulating steel raw materials, the influence of other elements also needs to be considered, such as sulfur, phosphorus, silicon, manganese, etc. The content and ratio of these elements will affect the performance and quality of steel. Therefore, the composition of raw materials and process parameters need to be strictly controlled during the production process to ensure that the performance and quality of the final product meet the requirements.

[0102] S2, the steel raw materials are sent into a heating furnace at a temperature of 1300-1450°C for melting, and then the molten liquid steel is forced to condense through the continuous casting machine, and finally cut to a fixed length according to demand to obtain the ingot.

[0103] S3, when the steel is heated to a temperature of 1300-1450°C, rough rolling is performed for 60-100 seconds at a rolling speed of 1-1.5 m / s, intermediate rolling is performed for 50-120 seconds at a rolling speed of 4-6.5 m / s, and finally finish rolling is performed for 50-100 seconds at a rolling speed of 6.5-15 m / s.

[0104] S4. The cooling of steel after hot rolling adopts a combination of natural cooling and controlled cooling. The hot-rolled steel is scattered in the atmosphere for a certain degree of natural cooling, and then forced to cool the hot-rolled steel by spraying water, mist, etc. The cooling speed is fast and uniform. Uniform structure and performance are obtained by controlling the cooling speed. The control accuracy directly affects the quality and performance of steel products.

[0105] To further explain, the rebar steel is processed with ribs after cooling, and the steel billets with better cooling and forming quality are selected. The steel billets are cut according to the required specifications and then straightened using a straightening machine to ensure that the length and diameter of the rebar meet the design requirements.

[0106] It is further explained that the temperature of the cooling and forming of the steel bar is controlled at 800-1000°C. The roller spacing of the straightening machine for straightening the steel bar billet needs to be reasonably adjusted according to the diameter of the steel bar. Generally, the center distance of the rollers should be 1mm-2mm larger than the diameter of the steel bar.

[0107] To further explain, the straightened steel bars are fed into the rolling mill, and through multiple passes of rolling and embossing, the appearance of the steel bars is changed into a ribbed shape. The steel bars after rolling and embossing are then cold treated, mainly by controlling the cold rolling speed and temperature, so that the mechanical properties of the steel bars are further improved.

[0108] To further explain, the temperature range controlled during the steel bar embossing process is 550-700°C.

[0109] To explain further, the rebar billet is cut to length after rib processing, the original rebar billet is cut into steel bars of specific length and specifications, the rebar billet is measured to determine the specific length to be cut, and then marks are made on the billet to indicate the cutting location.

[0110] Explaining further, the steel billet is fixed in a stable position using a suitable clamp or machine to ensure that the billet does not move during the cutting process, and the steel billet is cut using a cutting machine. This usually involves the use of a flame or a saw blade to cut through the billet.

[0111] Further explanation, after the steel bar billet is cut, the flatness and size of the cut are checked to ensure that they meet the requirements. If necessary, the cut can also be flattened. Finally, the cut steel bars are sorted, packaged and transported to the required construction site.

[0112] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for producing high-strength hot-rolled ribbed steel bars, comprising raw material preparation, smelting and continuous casting, hot rolling, cooling, ribbed processing, cut-to-length cutting, packaging and warehousing, characterized in that: The following steps are involved: S1, select steel containing alloy elements such as chromium, nickel, manganese, etc., and strictly screen and proportion the raw materials. The selection of steel raw materials mainly involves the following steps: (1) Determine the use environment and requirements: According to different use environments and requirements, steel with different sulfur and phosphorus contents can be selected to meet different needs; (2) Understand the sulfur and phosphorus content of steel: Before purchasing steel, you can ask the supplier about the content of alloy elements so as to choose the appropriate steel; (3) Detecting the sulfur and phosphorus content of steel: By detecting the sulfur and phosphorus content of steel, we can understand its quality and select high-quality steel; (4) Consider other performance indicators: For example, if used under high temperature conditions, the material of the parts must have certain high temperature strength and oxidation resistance; chemical equipment requires the material to have high corrosion resistance; some instrument parts require the material to have electromagnetic properties, etc. (5) Optimize material selection: Comprehensively consider material cost, molding process, material performance, reliability of use, etc., and use optimization methods to select the most suitable materials. If necessary, the selected materials must be tested and put into production before verification or adjustment; The proportioning of steel raw materials mainly involves the following steps: (1) Low carbon steel: The carbon content is generally between 0.008% and 0.25%. It is mainly used to manufacture structural parts and containers that require good plasticity and welding properties. (2) Medium carbon steel: The carbon content is generally between 0.25% and 0.6%. It has good strength and plasticity and can be used to manufacture structural parts and cutting tools that require higher strength. (3) High carbon steel: The carbon content is generally between 0.6% and 1.7%. It has high hardness and good wear resistance. It is mainly used to manufacture tools, measuring tools and cutting tools. (4) Alloy steel: Add a certain amount of alloy elements, such as chromium, nickel, tungsten, etc., to carbon steel to improve the mechanical properties and corrosion resistance of the steel, such as stainless steel, heat-resistant steel, wear-resistant steel, etc. (5) Cast steel: The carbon content is generally between 0.1% and 2.0%, and it is used to manufacture castings that require higher strength and toughness. When formulating steel raw materials, the influence of other elements also needs to be considered, such as sulfur, phosphorus, silicon, manganese, etc. The content and ratio of these elements will affect the performance and quality of steel. Therefore, the composition of raw materials and process parameters need to be strictly controlled during the production process to ensure that the performance and quality of the final product meet the requirements. S2, the steel raw materials are sent into a heating furnace at a temperature of 1200-1300°C for melting, and then the molten liquid steel is forced to condense through the continuous casting machine, and finally cut to a fixed length according to demand to obtain the ingot. S3, when the steel is heated to a temperature of 1200-1300°C, the steel is roughly rolled for 60-100 seconds at a rolling speed of 1-1.5 m / s, then intermediate rolled for 50-120 seconds at a rolling speed of 4-6.5 m / s, and finally fine rolled for 60-130 seconds at a rolling speed of 6.5-15 m / s. S4. The cooling of steel after hot rolling adopts a combination of natural cooling and controlled cooling. The hot-rolled steel is scattered in the atmosphere for a certain degree of natural cooling, and then forced to cool the hot-rolled steel by spraying water, mist, etc. The cooling speed is fast and uniform. Uniform structure and performance are obtained by controlling the cooling speed. The control accuracy directly affects the quality and performance of steel products.

2. The method for producing a high-strength hot-rolled ribbed steel bar according to claim 1, characterized in that: The steel bar is processed with ribs after cooling, and a relatively high-quality steel billet is selected for cooling and forming, and the steel billet is cut according to required specifications, and then straightened by a straightening machine to ensure that the length and diameter of the steel bar meet the design requirements.

3. The method for producing a high-strength hot-rolled ribbed steel bar according to claim 2, characterized in that: The cooling and forming temperature of the steel bar is controlled at 800-1000°C. The roller spacing of the straightening machine for straightening the steel bar billet needs to be reasonably adjusted according to the steel bar diameter. Generally, the roller center distance is 1mm-2mm larger than the steel bar diameter.

4. The method for producing a high-strength hot-rolled ribbed steel bar according to claim 1, characterized in that: The straightened steel bars are sent to a rolling mill, and through multiple rolling and embossing, the shape of the steel bars is changed into a ribbed shape. The steel bars after rolling and embossing are then cold treated, mainly by controlling the cold rolling speed and temperature, so that the mechanical properties of the steel bars are further improved.

5. The method for producing a high-strength hot-rolled ribbed steel bar according to claim 4, characterized in that: The temperature range controlled during the steel bar embossing process is 650-900°C.

6. The method for producing a high-strength hot-rolled ribbed steel bar according to claim 1, characterized in that: The steel bar billet is cut to length after ribbed processing, and the original steel bar billet is cut into steel bars of specific length and specification. The steel bar billet is measured to determine the specific length to be cut, and then marks are made on the billet to indicate the cutting position.

7. The method for producing a high-strength hot-rolled ribbed steel bar according to claim 1, characterized in that: The steel bar billet is fixed in a stable position using an appropriate clamp or machine to ensure that the billet does not move during the cutting process, and the steel bar billet is cut using a cutting machine, which usually involves using a flame or a saw blade to cut off the billet.

8. The method for producing a high-strength hot-rolled ribbed steel bar according to claim 1, characterized in that: After the steel bar billet is cut, the flatness and size of the cut are checked to ensure that they meet the requirements. If necessary, the cut can also be flattened. Finally, the cut steel bars are sorted, packaged and transported to the required construction site.