Stainless ball bearings are magnetic?

　　In real life, most people think there is no magnetic stainless ball bearings and stainless by means of magnets to identify the magnet can absorb ball bearings that it is fake, I'll tell you, in fact, this method is very scientific.

　　The variety of types of stainless at room temperature according to the organizational structure of 1 can be divided into several categories. Austenite type such as 304,321,316,310, etc; 2. Martensite or ferrite as 440,430,420,410, etc; austenitic type is non-magnetic or weakly magnetic, martensite or ferrite is magnetic. Usually used as a decorative tube plate is austenitic stainless majority of the 304, in general, it is a non-magnetic or weakly magnetic, but the chemical composition fluctuations caused by smelting or processing may occur different magnetic state, but it can not be considered counterfeit or substandard, which is what causes it? The above mentioned austenite is no magnetic or weakly magnetic, and martensite or ferrite is magnetic, due to improper heat treatment smelting segregation or will result in a small amount of austenitic 304 stainless steel martensite or ferrite body tissue. Thus, the 304 will carry a weak magnetic. Further, 304 stainless steel after cold working, the organizational structure will be transformed to martensite, the greater the degree of cold deformation, more martensite transformation, the greater the magnetic steel. As the strip batch number, production Φ76 tube, no significant magnetic induction, production Φ9.5 tube, Ling bending deformation due to significantly larger number of magnetic induction, the production of rectangular tube pipe due to deformation than large, especially Angular part , more intense magnetic distortion is more evident.

　　So magnetic stainless ball bearings exactly is how come? According to research materials physics, magnetic metal structure from the electron spin, electron spin quantum mechanical properties belong, either upward "can also be down." In ferromagnetic metals, electrons will automatically rotate in the same direction, while the anti-ferromagnetic metallic material, some of the electrons conducted in accordance with the rules of pattern, and the electrons in the opposite direction or adjacent antiparallel spin, but the triangular crystal The electronic grid, because of the two electrons in each triangle must spin in the same direction, so the spin structure no longer exists.

　　Article source: Wuxi Beitong Machinery & Equipment Co., Ltd

　　A: Mr Xia

　　Tel: 86-0510-82736376

　　E-mail：sale@bt-bearings

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