In the absence of an external magnetic field, it can maintain its own magnetic objects for a long time. Permanent magnets can be made of ferromagnetic materials such as iron, nickel, and the like.
Its atomic structure is special, and the atom itself has a magnetic moment. The general arrangement of these minerals is disordered, and the magnetic domains do not show magnetic interaction. However, when the external forces, such as magnetic fields, guide the alignment of the molecules, magnetic properties appear. This is commonly known as magnets. Iron, cobalt, and nickel are the most commonly used. Magnetic material. Basically, the magnets are divided into permanent magnets and soft magnets. The permanent magnets are coupled with strong magnets to align the spin and electron angular momentum of the magnetic material in a fixed direction; soft magnetism is to add current, etc. The current is removed and the soft iron will slowly lose. magnetic. A magnet is just a generic term, it is generally referred to as having magnetic properties, and the actual composition does not necessarily contain iron. The purer metallic iron itself has no permanent magnetism, and only near permanent magnets will induce magnetism. General permanent magnets add other impurity elements such as carbon to stabilize the magnetism, but this will reduce the freedom of electrons. It is not easy to conduct electricity, so when the current passes through, the light bulb will not light up. Iron is a common magnetic element, but many other elements have stronger magnetic properties. Many powerful magnets are made of a mixture of bismuth, iron, and boron.
Magnetic resistance: A measure of the permanent magnetic properties of a permanent magnetic material against magnetic and non-magnetic interferences.
Vitrified Grinding Wheels mean grinding wheels in ceramic bonded. Vitrified grinding wheels can be superabrasive grinding wheels like diamond grinding wheel or CBN Grinding Wheels. It also can be abrasive grinding wheels such as white aluminum oxide grinding wheel,pink grinding wheel,silicon carbide grinding.
Vitrified grinding wheel is only one type of bond, which is ceramic, it can be in any type of abrasive.
The main ingredient of vitrified bond are vitreous material with low melting point, such as borosilicate glass, lead glass, etc.It is widely used in various grinding methods such as outer circle, inner circle, flat surface, centerless, etc. It is the most commonly used bonding agent for abrasive tools.
Vitrified bond is characterized by high chemical stability, almost can work in a variety of cooling media, small elastic deformation, brittle, can be made into a variety of hardness levels of grinding tools to adapt to the processing of various hardness of the workpiece. Vitrified bond has good self-sharpening.
The grinding efficiency of single crystal diamond with vitrified bond grinding wheel is higher than metal bond grinding wheel. The wear ratio is very small and the processing cost is low. Therefore, the grinding efficiency of single crystal diamond with ceramic bond grinding wheel can be greatly improved.
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