Marine container forging is a vital component of ship structure, its quality and performance directly affect the safety and reliable operation of the ship. In the manufacturing process, cooling and tempering process control is an important step to ensure that Marine container forgings obtain sufficient strength and toughness.
The goal of cooling and tempering process control is to achieve the strength that can meet the design requirements and have excellent impact toughness and service life through reasonable treatment methods. The steps and key points of cooling and tempering process control of Marine container forgings will be introduced in detail below.
First of all, during the forging process, the billet to be processed needs to be heated to the appropriate temperature to ensure that it is easy to deform. Then the forging process is carried out to make the billet complete the forging deformation of the required shape. This step needs to be determined according to the shape, material and process requirements of the forging. At the same time, it is also necessary to control the temperature and forging speed in the forging process to ensure that the internal organization and performance of the forging are reasonably regulated.
After forging, the forgings will produce a certain thermal stress, in order to avoid defects such as cracks, forgings usually need to be gradually cooled to room temperature by air cooling or natural cooling. This can effectively reduce the thermal stress of forging, improve its stability and reliability.
Quenching is one of the key steps in cooling and tempering process control of Marine container forgings. After forging, the forgings need to be quenched to increase their hardness and strength. Quenching is the process of rapidly cooling forgings below the martensitic transition point at high temperatures and then further cooling to room temperature. In this way, the organization of the forgings can be formed into martensitic organization with higher strength and hardness. At the same time, the quenching process will also produce stress, in order to reduce the accumulation of internal stress and brittleness of the forging, to prepare for subsequent tempering, the need for appropriate tempering treatment.
Tempering is another important link in the process control of forging cooling and tempering after quenching. The hardness of the forgings after quenching is higher, but it is also easy to produce brittleness. In order to restore the toughness of the forging and reduce the internal stress, tempering treatment is required. The tempering temperature is generally selected within the tempering temperature range of the forging material, and the tempering temperature and holding time are adjusted as needed. Through appropriate tempering treatment, the hardness of forging can be reduced, while improving its toughness and impact toughness, so as to meet the requirements of Marine container forgings.
In the cooling and tempering process control of Marine container forgings, in addition to the above process steps, it is also necessary to strictly control and monitor the process parameters in the cooling and tempering process. Only by ensuring that the temperature, speed and time parameters of each step are correctly controlled can we ensure that the forging achieves excellent performance and quality. Therefore, the factory production process needs to be equipped with appropriate equipment and instruments in order to accurately monitor and control the cooling and tempering process of the forging. At the same time, it is also necessary to strictly implement the relevant process standards and specifications to ensure the stability and consistency of the process.
To sum up, the cooling and tempering process control of Marine container forgings is a key step to ensure the quality and performance of forgings. Through reasonable process parameters and strict control measures, the forgings can have enough strength, toughness and impact toughness to ensure the safe operation of the ship. In actual production, it is necessary to formulate appropriate cooling and tempering process control schemes according to factors such as the material, shape and design requirements of the forgings, and carry out effective process control and quality monitoring to ensure that the manufacturing quality and performance of Marine container forgings reach the best state.
