Casting aging treatment

Artificial aging is the process of heating castings to 550-650 ℃ for stress relief annealing, which saves time and thoroughly removes residual stresses compared to natural aging. Two materials obtain strength in different ways, "Menzemer said," 6061 aluminum alloy obtains strength through heat treatment, sometimes referred to as artificial aging. T6 is the optimized aging to achieve maximum strength.

Why do machine tool bed castings need tempering treatment: Steel is the most widely used material in the mechanical industry. The microstructure of steel is complex and can be controlled through heat treatment, so heat treatment of steel is the main content of metal heat treatment.

Why do machine tool bed castings need tempering treatment: Steel is the most widely used material in the mechanical industry. The microstructure of steel is complex and can be controlled through heat treatment, so heat treatment of steel is the main content of metal heat treatment. In order to achieve the required mechanical, physical, and chemical properties of machine tool castings, heat treatment processes are essential in addition to the rational selection of materials and various forming processes. In addition, aluminum, copper, magnesium, titanium and their alloys can also change their mechanical, physical and chemical properties through heat treatment to obtain different performance characteristics. Integrated heat treatment is a metal heat treatment process that heats cast iron flat plates, cast iron bent plates, or machine tool bed castings as a whole, and then cools them at an appropriate speed to change the overall mechanical properties of cast iron platforms, flat plates, cast iron bent plates, or machine tool bed castings.

The heat treatment of machine tool castings is an important process in mechanical manufacturing. Compared with other processing techniques, heat treatment generally does not change the shape and overall chemical composition of the workpiece. Instead, it imparts or improves the performance of the workpiece by changing the microstructure inside the workpiece or the chemical composition of the cast iron platform and machine tool casting surface. Its characteristic is to improve the intrinsic quality of cast iron platforms and machine tool bed castings. As a large type of casting, machine tool bed body castings must undergo aging treatment to improve their performance and enhance the internal quality of the bed body castings. The overall heat treatment of castings such as machine tool bed, bed column, and machine tool worktable can be roughly divided into four basic processes: annealing, normalizing, quenching, and tempering. When tempering machine tool bed castings, the tempering process should be strictly followed. Supporting ribs should be added to densely packed or easily deformed parts of the rib plate to prevent deformation and fracture caused by tempering temperature. There should be a dedicated person to monitor the tempering furnace thermometer, control the temperature in a timely manner, and prevent the temperature from being too high or too low, which will have a significant impact on the tempering workpiece.

Several purposes of tempering castings

1. Reduce brittleness, eliminate or reduce internal stress. Steel parts have significant internal stress and brittleness after quenching, and if not tempered in time, they often deform or even crack.

2. Obtain the required mechanical properties of the workpiece. After quenching, the workpiece has high hardness and brittleness. In order to meet the different performance requirements of various workpieces, the hardness can be adjusted through appropriate tempering to reduce brittleness and obtain the required toughness and plasticity.

3. Stable workpiece size

4. For certain alloy steels that are difficult to soften after annealing, high-temperature tempering is often used after quenching (or normalizing) to allow appropriate aggregation of carbides in the steel, reduce hardness, and facilitate cutting processing.