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| Angle steel is a kind of carbon structural steel used in construction and engineering. It has good weldability and mechanical strength, it’s widely used in various building structures and engineering structures. The good wear resistance of high-speed steel rolls not only ensure the quality of rolling steel,but also improve the rolling capacity for customers. | |||||||||
High Speed Steel (HSS) roll rings are specialized components used in the metal rolling industry. High speed steel is a complex alloy steel that typically contains a combination of elements such as tungsten (W), molybdenum (Mo), chromium (Cr), vanadium (V), and carbon (C). These elements are carefully proportioned to achieve a unique set of properties. For example, tungsten and molybdenum contribute to high hardness and red hardness (the ability to maintain hardness at elevated temperatures), chromium enhances corrosion resistance and wear resistance, and vanadium forms hard carbide particles that improve the overall wear performance of the material.
The production of HSS roll rings involves several steps. First, the raw materials are melted in an electric arc furnace or other suitable melting equipment. After melting, the alloy is refined to remove impurities. Then, the molten metal is cast into ingots. These ingots are subsequently hot worked, which may include processes like forging or rolling, to break down the as-cast structure, refine the grain size, and improve the mechanical properties of the material. Heat treatment is a crucial step in the manufacturing process. It includes processes such as annealing to relieve internal stresses, quenching to increase hardness, and tempering to optimize the balance between hardness and toughness. Precision machining is then carried out to shape the roll ring to the required dimensions and surface finish for its intended use in the rolling mill.
High Wear Resistance: HSS roll rings exhibit excellent wear resistance due to the presence of hard carbide particles dispersed in the matrix. This allows them to maintain their shape and performance over a longer period of time, reducing the frequency of roll changes in the rolling mill. For example, when rolling high-strength steels or other hard metals, HSS roll rings can withstand the abrasive forces better compared to traditional roll materials.
Good Red Hardness: As mentioned earlier, the ability of HSS to retain its hardness at elevated temperatures is a significant advantage. In the metal rolling process, the rolls can get very hot due to the friction and deformation of the metal being rolled. HSS roll rings can maintain their cutting and shaping capabilities even under these high-temperature conditions, ensuring consistent product quality.
Enhanced Machinability: Despite their high hardness, HSS roll rings can be machined to precise tolerances. This allows for the production of roll rings with complex geometries that are required for different rolling applications, such as shaping of profiles or achieving specific surface finishes on the rolled products.
Improved Product Quality: The consistent performance of HSS roll rings helps in producing rolled products with better dimensional accuracy, surface finish, and mechanical properties. The reduced wear and deformation of the rolls during the rolling process result in fewer defects in the final product.
Bar and Wire Rolling: HSS roll rings are widely used in the production of bars and wires. They are capable of rolling a variety of materials, including carbon steels, alloy steels, and stainless steels. In this application, the roll rings are responsible for reducing the diameter of the metal stock while maintaining the required shape and surface quality of the final product.
Section Rolling: For the production of structural sections such as angles, channels, and beams, HSS roll rings play a crucial role. They can accurately shape the metal to the desired cross-sectional profile, ensuring that the sections meet the required dimensional and quality standards.
Specialty Metal Rolling: In the rolling of specialty metals such as titanium alloys, nickel-based alloys, and other high-performance materials, HSS roll rings are often preferred due to their ability to handle the unique properties of these materials. The high wear resistance and red hardness of HSS make it suitable for rolling these often hard and heat-sensitive metals.
With the continuous development of the metal rolling industry, there is a growing demand for even more advanced HSS roll rings. Research and development efforts are focused on further improving the properties of HSS, such as increasing its wear resistance, reducing its cost, and enhancing its environmental friendliness. New alloy compositions and manufacturing processes are being explored to meet these challenges. Additionally, the integration of advanced monitoring and control systems with HSS roll rings is expected to optimize their performance and lifespan, leading to more efficient and cost-effective metal rolling operations in the future.
◆◇ Specification
| Type | Normal | Enchanced | High Strength |
| Roll Specification | Ø280 - Ø850 mm | ||
| Density | 7.6 g/cm³ | 7.8 g/cm³ | 8 g/cm³ |
| Casting | Centrifugal Casting | ||
| Heat Treatment | HBW Patented | ||
| Hardness | General: 82-89HSD Different range based on stands | ||
| Hardness Drop | ≤3HSD | ||
| Rolling Temperature | 780℃-1100℃ | ||
| Pass Life | 4-5 times than CI Rolls | 1.3 tims than HSS Normal | 1.5 tims than HSS Normal |
| Dressing | 1.0-1.5mm | ||
| Use Periods | 8-10 Cycles | ||
| Application | Good Thermal Stability | ||
| High Hardness and High Abrasion performance,long working life | |||
| No scratch and burrs | |||
| Accept customize and lettering | |||
◆◇ Chemical Analysis
Material | HBW Patented Chemical Composition (%) | |||||||||||
C | Si | Mn | Cr | Ni | Mo | V | W | P & S | Nb | Co | Others | |
HSS (Alloy composition changes based on different grades) | 1.5 ~ 2.10 | 0.3 ~ 1.0 | 0.30 ~ 0.70 | 3.00 ~ 6.00 | 0.50 ~ 1.50 | 3.0 ~ 7.0 | 2.0 ~ 8.0 | 1.0 ~ 8.0 | ≤0.03 | Depends on HSS Grade | ||
◆◇ Physical Properties
| Properties | Barrel | Core | |
| Tensile Strength | ≥700MPa | ≥450MPa | |
| Compressive Strength | ≥2500MPa | -- | |
High Speed Steel (HSS) roll rings are specialized components used in the metal rolling industry. High speed steel is a complex alloy steel that typically contains a combination of elements such as tungsten (W), molybdenum (Mo), chromium (Cr), vanadium (V), and carbon (C). These elements are carefully proportioned to achieve a unique set of properties. For example, tungsten and molybdenum contribute to high hardness and red hardness (the ability to maintain hardness at elevated temperatures), chromium enhances corrosion resistance and wear resistance, and vanadium forms hard carbide particles that improve the overall wear performance of the material.
The production of HSS roll rings involves several steps. First, the raw materials are melted in an electric arc furnace or other suitable melting equipment. After melting, the alloy is refined to remove impurities. Then, the molten metal is cast into ingots. These ingots are subsequently hot worked, which may include processes like forging or rolling, to break down the as-cast structure, refine the grain size, and improve the mechanical properties of the material. Heat treatment is a crucial step in the manufacturing process. It includes processes such as annealing to relieve internal stresses, quenching to increase hardness, and tempering to optimize the balance between hardness and toughness. Precision machining is then carried out to shape the roll ring to the required dimensions and surface finish for its intended use in the rolling mill.
High Wear Resistance: HSS roll rings exhibit excellent wear resistance due to the presence of hard carbide particles dispersed in the matrix. This allows them to maintain their shape and performance over a longer period of time, reducing the frequency of roll changes in the rolling mill. For example, when rolling high-strength steels or other hard metals, HSS roll rings can withstand the abrasive forces better compared to traditional roll materials.
Good Red Hardness: As mentioned earlier, the ability of HSS to retain its hardness at elevated temperatures is a significant advantage. In the metal rolling process, the rolls can get very hot due to the friction and deformation of the metal being rolled. HSS roll rings can maintain their cutting and shaping capabilities even under these high-temperature conditions, ensuring consistent product quality.
Enhanced Machinability: Despite their high hardness, HSS roll rings can be machined to precise tolerances. This allows for the production of roll rings with complex geometries that are required for different rolling applications, such as shaping of profiles or achieving specific surface finishes on the rolled products.
Improved Product Quality: The consistent performance of HSS roll rings helps in producing rolled products with better dimensional accuracy, surface finish, and mechanical properties. The reduced wear and deformation of the rolls during the rolling process result in fewer defects in the final product.
Bar and Wire Rolling: HSS roll rings are widely used in the production of bars and wires. They are capable of rolling a variety of materials, including carbon steels, alloy steels, and stainless steels. In this application, the roll rings are responsible for reducing the diameter of the metal stock while maintaining the required shape and surface quality of the final product.
Section Rolling: For the production of structural sections such as angles, channels, and beams, HSS roll rings play a crucial role. They can accurately shape the metal to the desired cross-sectional profile, ensuring that the sections meet the required dimensional and quality standards.
Specialty Metal Rolling: In the rolling of specialty metals such as titanium alloys, nickel-based alloys, and other high-performance materials, HSS roll rings are often preferred due to their ability to handle the unique properties of these materials. The high wear resistance and red hardness of HSS make it suitable for rolling these often hard and heat-sensitive metals.
With the continuous development of the metal rolling industry, there is a growing demand for even more advanced HSS roll rings. Research and development efforts are focused on further improving the properties of HSS, such as increasing its wear resistance, reducing its cost, and enhancing its environmental friendliness. New alloy compositions and manufacturing processes are being explored to meet these challenges. Additionally, the integration of advanced monitoring and control systems with HSS roll rings is expected to optimize their performance and lifespan, leading to more efficient and cost-effective metal rolling operations in the future.
◆◇ Specification
| Type | Normal | Enchanced | High Strength |
| Roll Specification | Ø280 - Ø850 mm | ||
| Density | 7.6 g/cm³ | 7.8 g/cm³ | 8 g/cm³ |
| Casting | Centrifugal Casting | ||
| Heat Treatment | HBW Patented | ||
| Hardness | General: 82-89HSD Different range based on stands | ||
| Hardness Drop | ≤3HSD | ||
| Rolling Temperature | 780℃-1100℃ | ||
| Pass Life | 4-5 times than CI Rolls | 1.3 tims than HSS Normal | 1.5 tims than HSS Normal |
| Dressing | 1.0-1.5mm | ||
| Use Periods | 8-10 Cycles | ||
| Application | Good Thermal Stability | ||
| High Hardness and High Abrasion performance,long working life | |||
| No scratch and burrs | |||
| Accept customize and lettering | |||
◆◇ Chemical Analysis
Material | HBW Patented Chemical Composition (%) | |||||||||||
C | Si | Mn | Cr | Ni | Mo | V | W | P & S | Nb | Co | Others | |
HSS (Alloy composition changes based on different grades) | 1.5 ~ 2.10 | 0.3 ~ 1.0 | 0.30 ~ 0.70 | 3.00 ~ 6.00 | 0.50 ~ 1.50 | 3.0 ~ 7.0 | 2.0 ~ 8.0 | 1.0 ~ 8.0 | ≤0.03 | Depends on HSS Grade | ||
◆◇ Physical Properties
| Properties | Barrel | Core | |
| Tensile Strength | ≥700MPa | ≥450MPa | |
| Compressive Strength | ≥2500MPa | -- | |