Research Progress on Molybdenum Sheet Stretching: Methods and Applications

Molybdenum, a transition metal with unique physical and chemical properties, finds applications in various industries such as aerospace, automotive, and nuclear energy. The demand for molybdenum sheets with high-performance characteristics has been increasing in recent years. To meet this demand, research on molybdenum sheet stretching technology has been ongoing, aiming to improve its mechanical properties, corrosion resistance, and surface finish. In this article, we will explore the research progress on molybdenum sheet stretching, focusing on the latest methods and their applications.

Methods of Stretching Molybdenum Sheets:

  1. Hot Rolling:
    Hot rolling is a common method used to stretch molybdenum sheets. In this process, the sheet is heated to a temperature above its recrystallization temperature and then rolled under controlled conditions to achieve the desired thickness and mechanical properties. Hot rolling allows for the production of high-quality molybdenum sheets with uniform properties.

  2. Cold Rolling:
    Cold rolling is a process that involves rolling the molybdenum sheet at room temperature without heating it. This method typically requires multiple passes of rolling to achieve the desired thickness reduction and mechanical properties. Cold rolling can result in high tensile strength and good surface finish but may require post-processing to remove surface defects.

  3. Electrochemical Stretching:
    Electrochemical stretching is a relatively new method that utilizes an electrochemical process to stretch the molybdenum sheet. In this method, an electrical current is passed through the sheet while applying a tensile force. The resulting electrochemical reactions cause the sheet to stretch uniformly in all directions. Electrochemical stretching offers precise control over deformation and can be used for complex shapes.

  4. Nanostructuring:
    Researchers are exploring the use of nanostructuring techniques to enhance the mechanical properties of molybdenum sheets. Nanostructuring involves creating nanometer-scale grains or patterns on the surface of the sheet, which can improve its hardness, corrosion resistance, and wear resistance. This approach is still in its early stages but holds promise for future applications.

Applications of Molybdenum Sheet Stretching:

  1. Aerospace Industry:
    Molybdenum sheets are used in aerospace applications due to their high strength, corrosion resistance, and temperature tolerance. Stretched molybdenum sheets are particularly suitable for aircraft engine components, turbine blades, and other critical parts that require high reliability and longevity.

  2. Nuclear Energy:
    In nuclear energy applications, molybdenum sheets are used in radiation shielding, reactor components, and nuclear waste containers. The stretched molybdenum sheets exhibit improved mechanical properties and corrosion resistance, making them suitable for these demanding environments.

  3. Automotive Industry:
    Molybdenum sheets are also finding applications in the automotive industry due to their high strength and corrosion resistance. Stretched molybdenum sheets are used in automotive components such as exhaust systems, cylinder heads, and manifolds that require durability and longevity under harsh conditions.

In conclusion, research progress on molybdenum sheet stretching technology has led to the development of various methods that can produce high-quality sheets with improved mechanical properties and surface finish. The applications of stretched molybdenum sheets span across multiple industries, including aerospace, nuclear energy, and automotive. With ongoing research and technological advancements, we can expect to see further improvements in molybdenum sheet stretching methods and expanded applications in the future.