Everyone knows that alloy steel products need to be annealed before processing because alloy steel has high hardness and density. If this process is ignored or not done well, it will be a great challenge to the processing tools and equipment!

Annealing is a metal heat treatment process that involves slowly heating a metal to a certain temperature, holding it for sufficient time, and then cooling it at an appropriate rate. Each step of the process needs to be carefully controlled in order to reduce the hardness of the metal. Improve the possibility and efficiency of cutting.

During the annealing process, the molecules inside the metal are rearranged to eliminate internal stress, reducing the influence of stress on its size and reducing the tendency for cracks.

It should be noted that many friends often confuse the concepts of quenching, annealing, and tempering. Let me introduce the role of each heat treatment process to you.

Quenching: used to improve the hardness and strength limit of steel

Annealing: eliminates internal stress in cast, forged, and welded parts, reduces material hardness, facilitates machining such as turning, improves internal molecular structure, and enhances human nature

Tempering: used to eliminate the strength and rigidity after quenching, providing plasticity and impact resistance

As can be seen from the above, if different heat treatment processes are used on ball screw, it will bring different characteristics. If not treated properly, shaft end deformation will occur, and processing difficulty will be high. In severe cases, even the phenomenon of shaft end fracture during initial use of the screw will occur. Companies need to choose different heat treatment processes according to different industries.