2.4669 is a superalloy material, also known as Inconel 718. Aging hardening is 2An important property of 4669 superalloy, it refers to the gradual increase in hardness and strength of the material after being held at a certain temperature for a certain period of time. Here are 2Analysis of the aging hardening characteristics of 4669 superalloys:
Aging hardening process:
1.Solution treatment: First, 2The 4669 superalloy is heated to a solution temperature, usually between 980-1050°C, and held for a period of time to allow the solute atoms in the solid solution in the alloy to dissolve uniformly in the matrix.
2.Rapid cooling (quenching): will be heat-treated after 2The 4669 superalloy is rapidly cooled to room temperature to prevent the reaggregation of solute atoms in the solid solution.
3.Age hardening: 2The 4669 superalloy is heated again to a lower temperature, usually between 550-750°C, for a certain period of time. During this aging process, the solute atoms in the solid solution begin to rearrange and precipitate, resulting in a diffuse strengthening phase that increases the hardness and strength of the material.
Aging hardening characteristics:
Aging temperature: 2The aging temperature of 4669 superalloy is usually selected between 550-750°C. Higher strength can be obtained at lower aging temperature, but the hardness growth is slower; Higher aging temperatures result in faster hardening rates, but lower strength growth.
Limitation time: Limitation time refers to 2The time that 4669 superalloy is held at aging temperature. Longer aging times can lead to higher hardness and strength, but can also lead to increased brittleness of the material. Therefore, in practical applications, it is necessary to make a reasonable choice according to specific requirements.
Hardness and strength growth: With the increase of aging time, 2The hardness and strength of 4669 superalloy gradually increase and tend to stabilize after reaching the peak. The increase in hardness and strength is mainly due to the formation and growth of the diffuse strengthening phase precipitated during aging.
It should be noted that 2The ageing hardening characteristics of 4669 superalloy are affected by the aging temperature, aging time, and the initial solution treatment. In specific applications, the temperature and time of solution treatment and aging treatment should be reasonably selected according to the use requirements and performance requirements of the material to obtain the best aging hardening effect. In addition, proper heat treatment process control and quality inspection should be carried out to ensure that 2The performance and quality of 4669 superalloy meet the requirements.