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Alloy Cast Steel Rolls (AS) Manufacturers

Alloy cast steel rolls are made by smelting molten steel in an intermediate frequency furnace and using casting and heat treatment technologies. They have high strength, resistance to hot cracking, toughness, and wear resistance. They are suitable for rough and medium rolling mills for section steel and rough hot-rolled strip steel. Rolling stand rollers and hot-rolled strip support rollers.

Alloy Cast Steel Rolls have high hardness and good wear resistance, which can maintain stable rolling effects during long-term rolling processes and extend the service life of the rolls. It can withstand large pressure and impact force, is not easily deformed or damaged, and can maintain stable working performance under high loads. It has good stability under high-temperature conditions and can maintain its shape, which helps to improve the dimensional accuracy of rolled products. Alloy steel usually has good oxidation resistance and can resist oxidation and corrosion in high-temperature environments, extending the service life of the rolls. The alloy composition of alloy steel rolls can be adjusted according to specific process requirements, making it suitable for different rolling processes and rolling materials, and has strong adaptability and flexibility. It has good processing performance and can perform high-precision processing and surface treatment to ensure that the rolled metal products have high-quality surface finish and dimensional accuracy.

Zhonghang Roll
Huzhou Zhonghang Roll Co., Ltd.
Huzhou Zhonghang Roll Co., Ltd. is professional China Alloy Cast Steel Rolls Manufacturers and Alloy Cast Steel Rolls factory. The company's predecessor was Cangnan County Roller Factory in Zhejiang Province, which was founded in 1992, and obtained the batch of roll production licenses issued by the former Ministry of Metallurgy in 1996. It is one of the earliest domestic manufacturers of metallurgical rolls.
In 2001, it was renamed Huzhou Zhonghang Roll Co., Ltd., and relocated to Leidian Industrial Zone, Deqing County in 2015 to coordinate with the implementation of the Hangzhou Canal Comprehensive Insurance Project. It was renamed Huzhou Zhonghang Roll Co., Ltd. The company is located in the Hangjiahu Plain, covering an area of 36,500 square meters. It is located across the river from the thousand-year-old town of Tangxi. It is 900m away from the Leidian exit of Shenjiahu Expressway, 300m away from Provincial Highway 304, and 25 kilometers away from Hangzhou.
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Huzhou Zhonghang Roll Co., Ltd.
Huzhou Zhonghang Roll Co., Ltd
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Alloy Cast Steel Rolls (AS) Industry knowledge

What is the difference between carbon steel materials and ordinary materials used for alloy cast steel rolls?

The primary differences between carbon steel materials and ordinary materials used for alloy cast steel rolls lie in their composition, properties, and applications. Here’s a breakdown of these differences:

1.Composition

Carbon Steel:

  • Primary Component: Iron (Fe) and carbon (C).
  • Carbon Content: Typically ranges from 0.2% to 2.1% by weight.
  • Other Elements: May contain small amounts of manganese (Mn), silicon (Si), and traces of other elements.

Alloy Cast Steel:

  • Primary Component: Iron (Fe).
  • Alloying Elements: Contains significant amounts of alloying elements such as chromium (Cr), nickel (Ni), molybdenum (Mo), vanadium (V), and others.
  • Carbon Content: Usually lower than that of plain carbon steel, but the specific content varies depending on the desired properties.

2.Properties

Carbon Steel:

  • Strength: Good tensile strength; higher carbon content increases hardness and strength but decreases ductility.
  • Ductility: Lower ductility with higher carbon content.
  • Wear Resistance: Moderate wear resistance.
  • Cost: Generally less expensive due to simpler composition and production processes.

Alloy Cast Steel:

  • Strength: Enhanced tensile strength and toughness due to alloying elements.
  • Ductility: Better ductility compared to high-carbon steel.
  • Wear Resistance: Superior wear and abrasion resistance, especially when alloyed with elements like chromium and molybdenum.
  • Hardness: Can be tailored to specific needs; often higher than that of plain carbon steel.
  • Corrosion Resistance: Improved resistance to corrosion and oxidation, particularly when alloyed with chromium and nickel.
  • Cost: More expensive due to the presence of alloying elements and more complex production processes.

3.Applications

Carbon Steel:

  • Common Uses: Structural components, automotive parts, pipelines, and general engineering.
  • Limitations: Less suitable for applications requiring high wear resistance, corrosion resistance, or specific mechanical properties.

Alloy Cast Steel:

  • Common Uses: Rolls in rolling mills, heavy machinery parts, tools, and components requiring high strength, wear resistance, and toughness.
  • Advantages: Preferred in demanding environments where durability, performance under stress, and longevity are critical.

4.Specific Use in Rolls

Carbon Steel Rolls:

  • Performance: Suitable for less demanding applications where cost is a significant factor.
  • Wear Resistance: Moderate; may require more frequent maintenance or replacement.

Alloy Cast Steel Rolls:

  • Performance: Excellent performance in high-stress, high-wear environments.
  • Wear Resistance: High; offers longer service life and better performance in demanding applications such as hot and cold rolling in steel mills.

While carbon steel is adequate for many general applications due to its cost-effectiveness and reasonable performance, alloy cast steel is chosen for specialized roles like steel rolls because of its superior mechanical properties and resistance to wear and corrosion.

Which aspects of hardness will affect the wear resistance of alloy cast steel rollers?

The hardness of alloy cast steel rollers significantly influences their wear resistance through the following aspects:

  • Surface Hardness:Higher surface hardness generally results in better wear resistance. This is because harder surfaces are more resistant to abrasion and indentation. However, there is a trade-off, as excessively high hardness can lead to brittleness and an increased risk of cracking.
  • Uniformity of Hardness:Consistent hardness throughout the roll material ensures uniform wear. Variations in hardness can lead to uneven wear and premature failure of certain areas.
  • Hardness Gradient:A hardness gradient from the surface to the core can be beneficial. A harder surface resists wear, while a tougher core provides strength and resistance to cracking and deformation.
  • Hardness of Carbides:The presence and distribution of hard carbide phases (e.g., chromium carbides, vanadium carbides) within the steel matrix contribute to overall hardness. These carbides are highly resistant to wear and enhance the wear resistance of the roll.
  • Heat Treatment-Induced Hardness:Proper heat treatment processes (like quenching and tempering) can optimize the hardness of the material. Controlled heat treatment can produce a microstructure that maximizes hardness while maintaining necessary toughness.
  • Microstructural Hardness: The hardness of different phases in the microstructure (e.g., martensite, bainite) affects wear resistance. Martensitic structures, for instance, are typically harder and more wear-resistant than ferritic or pearlitic structures.

Balancing these aspects of hardness is crucial to maximizing wear resistance while maintaining the structural integrity and toughness of alloy cast steel rollers.