Views: 0 Author: Kath Publish Time: 2025-01-03 Origin: Site
Here are a few case studies that show the specific impact of surface treatment on stainless steel flange performance:
1. Research background: This study aims to explore the influence of surface treatment parameters on the performance of wind turbine flange connection. The flange of the wind turbine bears a huge tangential load, and the static friction coefficient of its connection surface directly affects the performance of the flange connection.
2. Research method: By constructing a static friction coefficient prediction model based on fractal theory and conducting friction experiments to verify it, the influence of surface roughness, surface treatment process and surface coating on the static friction coefficient was studied.
3. Research results:
(1) Accuracy of the prediction model: The static friction prediction model has high accuracy and provides a theoretical basis for the precise design of the flange.
(2) Analysis of influencing factors: Surface roughness has the smallest effect on the static friction coefficient, followed by the surface treatment process, while the surface coating has the largest effect.
(3) Optimization results: By optimizing the surface treatment process, the maximum static friction coefficient can be obtained, thereby improving the performance and reliability of the flange connection. The experimental results show that the surface treatment parameter combination that produces the maximum static friction coefficient is roughness Ra 6.3, surface shot peening, and coating Paint B.
4. Advantages:
(1) Corrosion Resistance: Capable of withstanding harsh environments.
(2) Reliable Fastening: Withstands high torque and vibrations with bolt connections.
(3) Easy Maintenance: Reduces wear with regular lubrication.
(4) Easy Replacement: Facilitates maintenance with detachable design.
(5) Fatigue Resistance: Endures frequent loading.
(6) High Strength: Resists wind forces and rotational torque.
(7) Performance Enhancement: Surface treatment improves connection performance.
Disadvantages:
(1) Preloading Design Issues: Lack of precision.
(2) Uneven Stress Distribution: Caused by improper preloading.
(3) Uncertainty in Coefficient of Friction: Affects connection reliability.
(4) Surface Treatment Limitations: Limited impact on coefficient of friction.
(5) Poor Environmental Adaptability: Faces challenges in harsh conditions.
Magnetic grinding processing technology can effectively improve the surface quality of flange parts. It has the advantages of high processing efficiency, good surface strengthening effect, simple processing equipment and low cost. It is of great significance to improve the sealing performance and corrosion resistance of flanges.
1. Research Overview:
This study explores the application effect of magnetic grinding technology in improving the surface quality of flange parts. Magnetic grinding is a surface treatment technology that uses abrasives under the action of a magnetic field. It can effectively remove burrs and irregularities and improve smoothness and flatness.
2. Research methods:
In the study, a grinding test platform was constructed by modifying the spindle of the XK7136C CNC milling machine. The magnetic pole spindle drives the magnetic pole with side slots to rotate under the control of the CNC program, so as to realize the finishing processing of the inner surface of the flange coil by magnetic abrasive particles.
3. Research results:
(1) Improved surface quality: The test results show that the inner surface quality of the flange parts bent pipe after magnetic grinding is significantly improved, and the surface roughness value is reduced from 3.46μm to 1.18μm, which verifies the effect of magnetic grinding on the inner surface of the flange pipe. The surface finishing effect is good.
(2) Processing efficiency: Magnetic grinding has high processing efficiency and can reduce the surface roughness Ra value from 0.5-0.6μm to 0.2-0.1μm within 30-60 seconds.
(3) Surface strengthening: During the magnetic grinding process, the workpiece surface is repeatedly excited by an alternating or moving magnetic field, which strengthens the electrochemical process on the workpiece surface, increases the surface hardness, and improves the mechanical and physical properties.
(4) The processing equipment is simple and the cost is low: This method does not require preparatory processing equipment such as grinding wheels, oil stones, transmission belts, etc. The processing equipment is simple and the cost is low. The processing process is clean, with less vibration and noise.
1. Research background: The surface quality of flange is improved through a series of delicate steps. This method places special emphasis on flushing the flange before each grinding stage to reduce wear marks and improve surface smoothness.
2. Methods and procedures:
(1) Soaking: Soak the flange in a special solution for 35-45 minutes to remove surface oil stains.
(2) Rough grinding: Use 100# dry sandpaper to perform preliminary grinding on the flange to quickly remove the uneven parts of the surface.
(3) Fine grinding: After washing away the grinding debris from the rough grinding, use 400# dry sandpaper for fine grinding to further improve the surface flatness.
(4) Fine grinding: After rinsing again, use 800# or 1000# water-abrasive sandpaper for fine grinding to make the flange surface smoother.
(5) Drying: After fine grinding, rinse the flange with water and blow dry with a hair dryer to ensure that the surface is dry to prevent rust.
The flange surface grinding method and process proposed in this study significantly improves the surface quality of the flange, enhances its corrosion resistance and sealing performance through the steps of immersion, rough grinding, fine grinding, fine grinding and drying. Improving the overall performance of the flange is of great significance.
1. Research Overview:
This case study examines the effects of high-speed machining (HSM) on the surface quality of stainless steel flanges. HSM not only significantly reduces surface roughness but also minimizes residual stress, enhancing the flanges' durability and wear resistance.
2. Research Methods:
The study utilized a CNC milling machine with polycrystalline cubic boron nitride (PCBN) tools for HSM. Cutting parameters were optimized with a speed of 800 meters per minute, a feed rate of 0.1 millimeters per tooth, and a depth of cut at 0.5 millimeters to balance tool longevity and surface finish.
3. Research Results:
(1) Surface Roughness Improvement: HSM achieved a surface roughness (Ra) of merely 0.1 microns, rivaling the quality of ground surfaces, thus markedly enhancing flange surface quality.
(2) Residual Stress Reduction: Post-HSM, flange surface residual stress was measured using X-ray diffraction, revealing a predominance of compressive stress over tensile stress, which is beneficial for flange fatigue resistance and longevity.
(3) Surface Hardening Management: HSM's precision in controlling cutting temperature and material deformation allows for better surface hardening management, maintaining adequate hardness to resist wear without over-hardening the surface.
4. Conclusion:
High-speed machining emerges as a superior technique for stainless steel flange fabrication, offering improved surface quality and reduced residual stress. These enhancements are crucial for flanges subjected to high pressures and harsh environments, ensuring they remain robust against deformation and failure.
