Miniature sensor, small size, small range, high precision, easy to install. With advanced sealing technology, the sealing grade reaches IP65, and it can work in high humidity environments; it has a single-hole structure and double-hole structure; it has bending deformation structure and shear deformation structure. Widely used in automatic testing, medical equipment, control technology equipment, etc.
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The occurrence of black marks in billets is a clear indication of a bottleneck in the heating process. These marks are typically caused by uneven temperature distribution, which results in localized cooling and oxidation. To address this issue and improve temperature uniformity, the industry often extends the soaking time in the furnace. However, this approach limits production efficiency and can lead to overloading of the heating furnace, especially during high-demand or fast-paced production cycles.
To enhance performance, materials with superior high-temperature properties are used throughout the furnace. In the high-temperature zone, CrNWi alloy is applied, while CrNiRe is used in the intermediate section, and CrNi alloy is chosen for the lower-temperature areas. The slider assembly continues to use a simple yet reliable welding method, ensuring durability and ease of maintenance.
The height of the slider has been increased from 76mm to 120mm, and a series of holes with varying diameters have been incorporated into its design. This configuration significantly reduces the heat transfer area between the top and bottom of the slider. At the same time, the high-temperature furnace gases that circulate through these holes help raise the temperature of the upper part of the slider. As a result, the top surface of the slider approaches the ambient temperature of the furnace gas, reaching up to around 1150–1200°C. This greatly reduces the temperature difference between the slider and the billet, cutting it by approximately 60%. This improvement enhances the overall heating quality of the contact area, leading to a more even temperature distribution across the billet.
In addition, the placement of the sliders was optimized using an offset staggered arrangement. The spacing between the sliders was increased, and the contact area with the billet was alternated. This ensures that parts of the billet that were previously not well-heated now spend more time in contact with the heated sliders. As a result, the heating efficiency has been significantly improved.
Both sides of the slider are covered with refractory materials, which play a crucial role in maintaining the effectiveness and longevity of the system. As shown in the diagram, as the height of the slider increases, the angle of the refractory material also changes. This helps prevent the accumulation of iron oxide scale, reducing the shielding effect that could otherwise hinder heat transfer. This improvement directly enhances the heating conditions of the lower surface of the billet and the surrounding rail area.
In conclusion, after implementing the hole-type hot-slide rail technology, the system has demonstrated excellent performance. It utilizes high-heat-resistant alloys and advanced engineering methods to effectively address the challenges of poor heating in the contact area between the billet’s lower surface and the water-cooled zones. By reducing heat loss due to cooling, the system has boosted production capacity and improved heating quality, providing better conditions for the rolling mill operation. The technology is stable, reliable, and offers a short return on investment, making it a valuable innovation for push steel heating furnaces.