Rubber Rings Factory analyzes and proposes the following improvement measures to prevent cracking of high-carbon martensitic steel balls:
(1) Forging. Increase the forging ratio and strictly control the forging process to prevent the heart from becoming coarse after forging.
(2) Lowering the quenching water temperature of bearing steel balls and increasing the water outlet temperature can significantly reduce and relax the quenching stress of the workpiece.
(3) Add spheroidizing annealing before quenching to refine the structure so that the workpiece becomes fine needle-like (flake-like.) martensite after quenching to prevent coarse structure after quenching.
(4) Tempering in time after quenching to eliminate quenching stress, stabilize the structure, and further remove the hidden danger of cracking of the workpiece.
Through the above introduction, Mist Pump Box Wholesaler hopes that you can simply refer to the content of this article in future use.