Marine diesel engine is an important part of Marine power system, its performance and reliability directly affect the efficiency and safety of the ship. As an important part of Marine diesel engine, the production process and quality control of forgings have an important impact on the performance and reliability of diesel engine. This paper introduces the production process and quality control method of Marine diesel engine forgings.
Production technology of Marine diesel engine forgings
Raw material preparation
Marine diesel engine forgings usually use high-quality steel as raw materials, such as low carbon alloy steel, high strength steel, etc. Before production, it is necessary to carry out strict quality checks on raw materials to ensure that their chemical composition and mechanical properties meet relevant standards.
Heating and forging
Heating is an important link in the forging process, through heating to make the raw material reach the appropriate forging temperature. During the heating process, the heating temperature and time need to be controlled to avoid oxidation and overheating of the material. The raw material is then plastically deformed by forging equipment so that it forms the desired shape and size.
Cooling and straightening
After forging is completed, the forging needs to be cooled to prevent heat treatment defects in the material. At the same time, the forging needs to be straightened to ensure the accuracy of its shape and size.
Heat treatment and surface treatment
According to the material and design requirements, it is necessary to heat treat the forgings to improve their mechanical properties and corrosion resistance. In addition, surface treatment of forgings, such as shot blasting, sandblasting, etc., is also needed to improve its surface hardness and wear resistance.
Quality control of Marine diesel engine forgings
Raw material quality control
The quality of raw materials directly affects the quality of forgings. Therefore, when purchasing raw materials, it is necessary to select high-quality suppliers and carry out strict quality checks on raw materials. At the same time, the raw materials need to be properly kept to avoid contamination and damage.
Production process quality control
In the production process, it is necessary to carry out strict quality control for each process. For example, in the heating process, it is necessary to control the heating temperature and time; In the forging process, it is necessary to ensure the accuracy and stability of the forging equipment; In the cooling and straightening process, it is necessary to ensure that the treatment method and time are reasonable. In addition, it is also necessary to record and analyze the data in the production process in order to find and solve problems in time.
Finished product inspection and testing
The inspection of the finished product is an important link to ensure the quality of the product. In the process of finished product inspection, it is necessary to conduct a comprehensive inspection of the size, shape, surface quality and mechanical properties of the forging. The unqualified forgings need to be processed and reworked in time. At the same time, the finished product also needs to be tested to verify whether it meets the design requirements and performance. Test results need to be recorded and archived for subsequent analysis and improvement.
Continuous improvement and optimization
In the production process, it is necessary to constantly summarize the lessons learned and continuously improve the production process and quality control methods. Improve production efficiency and product quality levels by introducing new technologies, new equipment and new processes. At the same time, it is also necessary to strengthen staff training and technical exchange activities to improve staff quality and technical level. In addition, it is necessary to establish a sound quality management system and strictly implement relevant standards and norms to ensure stable and reliable product quality.
The production process and quality control of Marine diesel engine forgings have important influence on the performance and reliability of diesel engines. Through reasonable production process and strict quality control measures, the quality of forging parts can be ensured to be stable and reliable and improve the overall performance level of diesel engine. Therefore, in the actual production process, it is necessary to constantly summarize the experience and lessons and continuously improve the production process and quality control methods to ensure that the product quality is stable and reliable and meet the market demand.
