Steel Industry Centrifugal Casting Parts Manufacturers, Factory

Steel Industry

Core Advantages of Furnace Rolls in the Steel Industry

1. Material Technology for High Temperature Resistance and Oxidation Resistance

High chromium-nickel alloys (such as 25Cr35NiNb and 40Cr30Ni) and cobalt-based alloys (Stellite 6) are used to ensure that the furnace rolls can operate for a long time in a high-temperature environment of 1100°C - 1300°C. The oxidation resistance is increased by more than 50%, avoiding the scratching of the steel strip caused by the peeling of the surface oxide scale. (Compared with traditional materials: ordinary heat-resistant steels are prone to intergranular corrosion above 1000°C.)

Through centrifugal casting and surfacing technology, a gradient structure with high hardness on the outer layer of the roll body (HRC 55-60) and high toughness on the inner layer (impact energy ≥ 40J) is achieved, taking into account both wear resistance and thermal shock resistance.

2. Anti-deformation and High Load-bearing Design

Optimize the material ratio (adding elements such as niobium and molybdenum), and cooperate with the pre-deformation compensation design to ensure that the radial deformation of the furnace roll under long-term high-temperature load is ≤ 0.1mm/m, avoiding the deviation or wrinkling of the steel strip.

Use a honeycomb-shaped hollow roll body (weight reduced by 20%-30%) or a double-layer water-cooled structure (suitable for quenching furnaces). The load-bearing capacity reaches 5-8 tons/roll, meeting the requirements of thick plate and high-speed production lines.

3. Surface Treatment and Upgrade of Wear Resistance

Clad tungsten carbide (WC) or ceramic coating (Al₂O₃-TiO₂) on the roll surface. The hardness is increased to above HV 1200, and the wear life is extended by 3-5 times, reducing the particle shedding caused by the friction between the strip steel and the furnace roll in the pickling line.

The surface roughness of the roll is ≤ Ra 0.4μm (the traditional roll is Ra 1.6μm), reducing the residual oxides on the surface of the steel strip and significantly improving the surface quality of high-precision products such as automotive panels and home appliance panels.

4. Full-process Quality Control and Life Prediction

Undergo ultrasonic flaw detection (EN 10228-3), magnetic particle inspection (ASTM E709) and three-dimensional roundness detection (accuracy ± 0.02mm) to ensure that there are no internal defects such as pores and slag inclusions.

Equipped with IoT sensors (temperature and vibration monitoring), which can transmit data to the customer's central control platform in real time, providing remaining life warnings and maintenance suggestions, and reducing the risk of unexpected shutdowns.

5. Industry Customized Solutions

For continuous annealing furnaces: water-cooled furnace rolls, resistant to sudden temperature changes (800°C → water-cooled ≤ 100°C);
For hot-dip galvanizing lines: silicon-tungsten carbide coated rolls resistant to zinc liquid corrosion;
For pickling lines: composite rubber-clad rolls, resistant to hydrochloric acid/sulfuric acid erosion.

Support the customization of non-standard dimensions (diameter 200mm-2000mm) and special-shaped roll types (conical, drum-shaped). The delivery cycle is shortened to 25 days (the industry average is more than 40 days).

6. Energy Conservation, Consumption Reduction and Sustainability

The hollow roll body structure reduces heat accumulation, and cooperates with the water cooling system to save 15%-20% of energy, helping steel plants achieve their carbon emission targets.

Provide remanufacturing services for old rolls (the repair cost is only 40% of that of new rolls), extend the product life cycle, and reduce resource waste.

Type of Production Line	Pain Points	Our Company's Solution	Customer Benefits
Continuous Annealing Furnace	The warping of the strip steel caused by the deformation of the furnace roll	25Cr35NiNb alloy + pre-deformation compensation design	The service life of the furnace roll is extended from 8 months to 18 months, and the warping rate is reduced by 90%.
Hot-dip Galvanizing Line	The nodulation of the roll surface caused by the adhesion of zinc slag	Surface laser cladding of tungsten carbide coating	The cleaning cycle is extended from 3 days to 15 days, and the residual amount of zinc slag is reduced by 70%.
Stainless Steel Pickling Line	The rapid failure of the roll body caused by hydrochloric acid corrosion	Rubber cladding + Hastelloy C-276 shaft end	The annual replacement frequency is reduced from 6 times to 1 time, and the maintenance cost is reduced by 80%