Determined by the characteristics of neodymium iron boron magnets, if the atomic current is explained, the magnetic field generated by the current magnetizes the magnetized object of another object to generate an electric field and an electric field to interact with each other to generate force. Matter is mainly composed of molecules, molecules are composed of atoms, and atoms are composed of nuclei and electrons. Inside the atom, the electron continues to spin and revolve around the nucleus. Both of these electronic movements produce magnetism. But in most cases, the direction of electron movement is different. Disorganized, the magnetic effects cancel each other out. Therefore, most substances will not exhibit magnetism under normal conditions. Iron cobalt ferromagnetic substances such as nickel or ferrite are different. The internal electron spins can be spontaneously arranged in a small range to form a spontaneous magnetization zone. This spontaneous magnetization region is called a magnetic domain. After the ferromagnetic substance is magnetized, the internal magnetic domains are aligned neatly. The direction is aligned to form a magnetic enhancement and form a magnet. The magnet absorption process of the neodymium iron boron magnet is the magnetization process of the iron block. The magnetized iron block and the magnet attract each other with different polarities, and the iron block adheres firmly to the magnet. We say that magnets are magnetic.

Neodymium iron boron magnets can pick up things related to the permeability of the attracted material, and magnetic permeability and magnetic domains are related. Among the various elements in nature, nickel has the highest permeability, followed by cobalt. This is iron. Other materials such as copper also have a certain magnetic permeability, but they are very low, so we cannot feel it. Things that do not contain iron can be attracted by magnets. Stainless steel is an alloy and is added based on iron. Chromium and nickel such as 1Cr13 add Cr, 310 stainless steel, Cr25Ni20Si2, add Cr and Ni and Si, 304 stainless steel add Cr, Ni, Ti, etc., thereby changing the original magnetic domain arrangement and reducing the magnetic conductivity, even if our hands cannot feel it, So we can't feel it. According to the same principle, we can also use alloys to make alloys with very high magnetic permeability. People often use stainless steel magnets to verify their advantages and disadvantages. Don't smoke without magnetism, think it is good, and vice versa, it is considered counterfeit. In fact, this is an unrealistic way of distinguishing. Anyone who has been dealing with stainless steel materials for more than ten years knows that they are likely to encounter traditional methods of determining whether there is magnetism. According to them, there are many kinds of stainless steel, according to the room temperature structure can be divided into austenitic type and martensitic type or ferrite type. The austenite type is non-magnetic or weakly magnetic, and the martensite or ferrite type is magnetic. However, this is not necessarily the case. For example, it is often used as a decorative tube sheet. Austenitic 304 materials are generally non-magnetic. However, due to fluctuations in chemical composition or processing conditions caused by melting, magnetism may occur. This cannot be regarded as counterfeit or substandard. In addition, 304 stainless steel undergoes cold processing, and the microstructure is also transformed into Markov. The greater the cold working deformation, the more martensite transformation and the greater the magnetic properties of the steel. On the contrary, the 200 series stainless steel of secondary quality is likely to be magnetic, so it is wrong to judge that it is genuine stainless steel.