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HIGH QUALITY

  • Casting guarantee

    Using high-quality raw materials and alloy materials for furnace melting, adjusting the chemical composition strictly according to customer or process requirements, and controlling the pouring temperature of molten iron strictly according to process requirements to obtain satisfactory grain structure.

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  • Heat treatment guarantee

    Develop corresponding heat treatment curves based on the different organizational and hardness requirements of the rolling mill, strictly control and track the heat treatment processes such as annealing, quenching, and tempering to ensure efficient heat treatment quality is achieved.

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  • Processing guarantee

    According to the processing drawings issued by the Ministry of Technology and Wood, carefully check whether the material numbers on the drawings and the roller body are consistent. Carefully examine the content of the drawings, clarify the tolerance dimensions and processing requirements of each shaft segment, and then start strict processing according to the drawings.

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  • Testing guarantee

    We have a series of advanced testing equipment, including optical analyzers, hardness testers, metallographic microscopes, ultrasonic flaw detectors, and strength tensile machines. Through strict testing methods, the chemical composition, hardness, metallography, flaw detection, tensile strength, and other chemical and physical properties of the product are tested.

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QUALITY INSPECTION
  • High Standards
    Our products not only meet the performance requirements of the national standard, but also exceed the domestic standard in many aspects. If our centrifugal roller neck tensile strength standard requires 450 megapascals, we can achieve 600 megapascals. The static roller standard requires 300 megapascals, and we can achieve 500 megapascals. This strength of the rolling mill can be used in various environments such as bar and wire, profiles, medium and wide width rolling lines.
  • Strict Management
    Promoting brand through quality has always been the core concept of Zhonghang. We have successively passed the ISO9001 and ISO14001 international quality and environmental management system certifications, AA standardized good behavior certification, and implemented a strict quality control system.

HONOR CERTIFICATE

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