The quality inspection of the bearing steel The inspection method of the bearing steel 1. In addition, pickling inspection can also be used, that is, take 250mm at both ends of the discs, and inspect the surface with the naked eye after pickling according to the low-power pickling process. Chemical composition analysis: The chemical composition is generally sampled and analyzed by furnace number. These moisture or gas will not have time to discharge the molten steel and form subcutaneous bubbles. The annealed structure is not uniform, which leads to the deterioration of the cutting performance of the steel, and the structure of the parts after quenching is not uniform, which causes the life of bearing parts to be reduced.The tensile test method is carried out in accordance with the GB228-76 standard. However, due to improper pouring and cooling processes, such as unreasonable setting, insufficient heat preservation of the ingot head, and a small amount of removal of the ingot head after the billet, the shrinkage cavity remains in the steel, which will be displayed during low-magnification inspection. In addition to electric furnace smelting and electroslag remelting, the manufacturer also uses electric furnace smelting and out-of-furnace refining, vacuum deoxidation, argon blowing treatment, and out-of-furnace powder spraying processes to reduce the oxygen content in steel to below 20 ppm. During the condensation process of the molten steel, the gas escapes from the molten steel. The internal segregation and porosity of bearing steel are required to be controlled within a certain range. \u2464 Segregation: In the process of liquid steel condensation, the uneven chemical composition caused by the different chemical composition of carbon, chromium, tungsten, phosphorus and other elements in the steel and the different diffusion speeds is called segregation. Non-metallic inclusions, band-shaped, liquid-separated, and net-shaped samples shall be quenched and tempered. (3) Surface quality: The forming methods of bearing parts include forging, turning and cold punchingLike a batch of high speed bearing, \u03a676 tubes are produced without obvious magnetic induction, and \u03a69.; austenite type is non-magnetic or weakly magnetic, and martensite or ferrite is magnetic. It is considered good and genuine. Generally speaking, it is non-magnetic or weak magnetic.\ufeffWhy does stainless steel have magnetism?