Thermal forging is an important component in thermal power generation industry, and its quality directly affects the operating efficiency and safety of thermal power generation equipment. In the production process of thermal power forgings, due to various reasons, there are often various defects, such as cracks, shrinkage holes, inclusions, etc. These defects will not only affect product quality, but also lead to equipment failure in serious cases. Therefore, it is of great significance to analyze and prevent the defects in the production of thermal power forgings for improving product quality and output.
The production process of thermal power forging mainly includes the following links:
Raw material preparation: Select high-quality alloy steel as raw materials, after cutting, grinding and other pretreatment, enter the forging link.
Forging: The pre-treated raw materials are heated to the appropriate temperature and forged to form the desired forging shape.
Heat treatment: after forging forging quenching, tempering and other heat treatment process to adjust its internal structure and mechanical properties.
Machining: Finishing the forgings after heat treatment to meet the requirements of the drawing.
Inspection: Strict quality inspection is carried out on the final product to ensure that the product meets the standards.
In the production process of thermal power forgings, common defect types mainly include the following:
Cracks: Cracks are one of the most common defects in thermal power forgings, the main reasons include cracks in raw materials, improper temperature control during forging, and excessive forging stress.
Shrinkage hole: Shrinkage hole is a defect caused by the volume contraction of the metal during the solidification process, the main reasons include the existence of shrinkage holes in the raw material, improper temperature control during the forging process, and insufficient forging ratio.
Inclusion: Inclusion is a defect caused by mixing other substances in the metal, the main reasons include inclusion in the raw material, improper temperature control during the forging process, and poor atmosphere in the furnace.
Unqualified shape and size: Unqualified shape and size are defects caused by improper temperature control in the forging process, insufficient forging ratio, mold wear and other reasons.
In view of the above defects, corresponding prevention and improvement measures can be taken, such as strengthening the quality control of raw materials, optimizing the forging process, improving the heat treatment process, and improving the machining accuracy.
In order to prevent defects in the production of thermal power forgings, the following measures can be taken:
Strengthen the quality control of raw materials: select high-quality alloy steel as raw materials, and carry out strict incoming inspection to ensure that the quality of raw materials meets the requirements.
Optimization of forging process: The use of advanced forging equipment and technology, reasonable control of forging process temperature, speed and stress, in order to reduce cracks, shrinkage holes and other defects.
Improve the heat treatment process: the use of advanced heat treatment equipment and process, reasonable control of quenching, tempering and other heat treatment process temperature and time, to ensure the stability and reliability of product performance.
Improve machining accuracy: The use of high-precision CNC machine tools and other equipment to finish the forging, reasonable control of processing allowance and cutting speed, to ensure the shape and dimension accuracy of the product and surface quality.
Strengthen production process monitoring: real-time monitoring and recording of key links in the production process, timely detection and treatment of potential quality problems to avoid defects.
Defect analysis and prevention in thermal power forging production is an important measure to improve product quality and output. By analyzing and preventing the defects that may occur in the production process, corresponding improvement measures can be taken, such as strengthening the quality control of raw materials, optimizing the forging process, improving the heat treatment process, and improving the machining accuracy. The implementation of these measures can effectively reduce the occurrence of defects, improve product quality and output, and create greater economic and social benefits for enterprises. Therefore, thermal power forging manufacturers should attach great importance to defect analysis and prevention, and constantly improve the quality management system and production process to achieve sustainable development.
