In addition, after 304 stainless steel is cold worked, the structure will also be transformed into martensite. But for triangular crystals For the electrons in the lattice, since the two electrons in each triangle must spin in the same direction, the spin structure no longer exists. If you want to completely eliminate the magnetism of 304 stainless steel, you can restore and stabilize the austenite structure through high temperature solution treatment, thereby eliminating magnetism.In real life, most people think that stainless steel is not magnetic, and it is unscientific to use magnets to identify stainless steel. They are non-environmentally friendly stainless steels. In addition, as mentioned above, austenite is non-magnetic or weakly magnetic, while ferrite and martensite are magnetic. From the perspective of the development prospects of stainless steel, the replacement of the 300 series by the 400 series is a general trend. In ferromagnetic metals, electrons automatically rotate in the same direction, while in antiferromagnetic metal materials, some electrons follow a regular pattern, while neighboring electrons spin in the opposite direction or antiparallel. Therefore, many large enterprises with foresight now say no to the 200 series.. First of all, zinc alloy and copper alloy can generally imitate the appearance and color of stainless steel, and there is no magnetism, which is easy to be mistaken for stainless steel; and even the 304 steel we most commonly use at present, after cold processing, there will be varying degrees of magnetism. , And set their sights on the 400 series stainless steel with more development potential. Due to the segregation of components during smelting or improper heat treatment, a small amount of martensite will appear in 6202 ball bearing the austenitic 304 stainless steel. . We think it is the physical properties of the material, and the corrosion resistance of the material is determined by the chemical composition of the material, which is the chemical composition of the material. So how does the magnetism of stainless steel come from? According to the research of material physics, the magnetism of metals comes from the structure of electron spin, which belongs to quantum mechanical properties, which can be 'upward' or 'downward'. Some steel grades (such as 304, etc. Body or ferrite structure, so weak magnetism will appear in 304 stainless steel.
