Molybdenum Plate Cracks
Abstract: This article introduces the causes and prevention methods of molybdenum plate cracks. Through theoretical analysis and practical examples, it is explained how temperature difference, stress concentration, welding defects, and other factors lead to molybdenum plate cracks. It also provides effective prevention methods to help readers avoid similar problems in production.
Keywords: molybdenum plate, crack, temperature difference, stress concentration, welding defects, prevention method.
Molybdenum plate is a high-strength material with good corrosion resistance and high-temperature resistance. It is widely used in chemical industry, power generation, aerospace, and other fields. However, in the process of production and use, molybdenum plate cracks often occur, which has a serious impact on the structural safety and service life of the product. Therefore, it is very important to analyze the causes of molybdenum plate cracks and take effective prevention measures.
Causes of Molybdenum Plate Cracks
2.1 Temperature Difference
Temperature difference is one of the main causes of molybdenum plate cracks. During the production or use of molybdenum plate, large temperature differences often lead to uneven stress distribution and mismatch of mechanical properties, which can cause cracks in the plate. For example, in the process of welding, if the temperature difference between the welding seam and the surrounding area is too large, it will cause stress concentration and cracking.
2.2 Stress Concentration
Local stress concentration is also one of the main causes of molybdenum plate cracks. Molybdenum plate has a high-strength material characteristic, but it is also sensitive to stress concentration. If there are sharp corners or other stress concentration factors in the molybdenum plate structure or manufacturing process, it will lead to stress concentration and eventually cause cracks.
2.3 Welding Defects
Welding defects are also one of the main causes of molybdenum plate cracks. During the production process of molybdenum plate, welding defects such as incomplete fusion, slag inclusions, and misalignment often occur. These defects will lead to local stress concentration and mismatch of mechanical properties, resulting in molybdenum plate cracks.
- Prevention Methods of Molybdenum Plate Cracks
3.1 Control Temperature Difference
To prevent molybdenum plate cracks caused by temperature difference, it is necessary to control the temperature difference during production or use as much as possible. For example, in the process of welding, appropriate heat treatment methods can be selected to reduce the temperature difference between the welding seam and the surrounding area. In addition, appropriate measures can be taken to improve heat dissipation in the molybdenum plate structure to reduce temperature difference-induced stress concentration.
3.2 Optimize Structure Design and Processing Technology
To prevent molybdenum plate cracks caused by stress concentration, it is necessary to optimize the structure design and processing technology. For example, sharp corners or other stress concentration factors can be avoided in the molybdenum plate structure design. In addition, processing methods that may cause stress concentration should be avoided in the processing process as much as possible. For example, when cutting or boring molybdenum plates, it is better to use methods with small abrasion such as laser cutting or electrical discharge machining.