【Daily Question 20101125】What are the types of melts? Give a brief overview of the specifications and features.
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This post was last edited by zhaohh3211 on 2010-12-3 12:05. [Question] What are the types of melts? Give a brief overview of the specifications and features. 【Answer】Melters are of two types: fuses and fusible links. Commonly known as fuses and fuse links, they must all be used in fuses. Common fuses are circular wires of different diameters made from alloys such as lead and tin, and their specifications are usually indicated by their rated current, such as 1A, 2A, 3A, 10A, 15A, 20A, 25A, 30A, etc. Generally, fuses with a rating of 30A or higher are made of lead alloy or zinc alloy, and their specifications include 50A, 75A, 100A, 150A, 200A, 600A, etc. There are also special fuses and fuse links, which are used in the fusing cores and fusing core tubes supplied as sets; their material and shape differ from those of ordinary fuses and fuse links. Its advantage is relatively accurate numerical values, but it cannot be replaced on its own after failing, which results in a higher price. Fuses such as the RL1, RLS series, and RTO series use this type of fuse core.
I just thought those with fuses and circuit breakers were funny
Lead-tin alloy fuses, copper wire melts, zinc fuses, and so on
Let’s first talk about fuses classified by function: I. Function of the fuse element 1. The gG type is a fuse element with full-range breaking capacity and is intended for general purposes. 2. The aM type is a motor protection fuse with partial range interruption. II. Structural Function 1. Standard overcurrent protection function. 2. Dedicated for semiconductor converter devices. 3. Those equipped with a fuse indication device and alarm. 4. Signal fuse.
Solid solution: A solid solution refers to an alloy phase formed when solute atoms are incorporated into the lattice of a metal solvent. The two components are mutually soluble in the liquid state, and they also dissolve in each other in the solid state, forming a homogeneous substance. When a solid solution is formed, the component with a higher concentration acts as the solvent, while the component with a lower concentration acts as the solute ； The lattice of the solvent is the lattice of the solid solution. ● Classification of solid solutions: Based on the position of the solute atoms in the lattice, they can be divided into substitutional solid solutions and interstitial solid solutions. 1. Solid solution by substitution: A solid solution formed when solute atoms occupy the interstitial sites in the solvent lattice is called a solid solution by substitution. When the diameters of the solvent and solute atoms differ by not much, generally within 15%, it is easy to form a substitutional solid solution. The copper-nickel binary alloy forms a substitutional solid solution, with nickel atoms being able to replace copper atoms at any position in the copper lattice. 2. Interstitial solid solution: A solid solution in which solute atoms are distributed in the interstices of the solvent lattice is called an interstitial solid solution. The solvent in interstitial solid solutions is a transition metal with a larger diameter, while the solute are non-metallic elements such as carbon and hydrogen with much smaller diameters. The condition for its formation is that the ratio of the diameter of the solute atom to that of the solvent atom must be less than 0.59. In iron-carbon alloys, the solid solutions formed by iron and carbon—ferrite and austenite—are both interstitial solid solutions. Furthermore, based on the solubility of the solute element in the solid solution, they can be divided into limited solid solutions and unlimited solid solutions. But only substitutional solid solutions have the potential to become infinite solid solutions.