In the smelting process of steel, there are many processes, one of which is quenching. Many people have heard of the word quenching, but few people understand its specific meaning. So, what is the simplest method of quenching and quenching? What is the simplest method of quenching? Quenching is to heat the steel to above the critical temperature, hold it for a certain period of time, and then cool it at a rate greater than the critical cooling rate, so as to obtain a martensitic It is a heat treatment process method for the unbalanced structure dominated by the body (there is also a heat treatment method to obtain bainite or maintain single-phase austenite as required). Kehua Induction Heating Equipment
believes that quenching is the most widely used process method in steel heat treatment. Quenching is to heat the steel to a temperature above the critical temperature Ac3 (hypoeutectoid steel) or Ac1 (hypereutectoid steel), keep it for a period of time, make it all or part of austenitizing, and then cool at a faster cooling rate than the critical cooling rate. A heat treatment process for martensite (or bainite) transformation by cooling below Ms (or isothermal near Ms). According to Guangzhou Youzao, the solution treatment of aluminum alloy, copper alloy, titanium alloy, tempered glass and other materials or the heat treatment process with rapid cooling process is usually called quenching. The simplest method of quenching What is the easiest method of quenching? First, burn the iron block in red and soften it to make it easy to shape. While firing, hammer it and then quickly immerse it in cold water, and then burn it red again, repeating more than 5 times. To make the high temperature phase in the steel - austenite transform into the low temperature metastable phase - martensite during the cooling process, the cooling rate must be greater than the critical cooling rate of the steel. During the cooling process of the workpiece, there is a certain difference in the cooling rate between the surface and the core. If the difference is large enough, it may cause the part greater than the critical cooling rate to transform into martensite, while the core that is less than the critical cooling rate cannot be transformed into martensite. The case of martensite. In order to ensure that the entire section is transformed into martensite, it is necessary to select a quenching medium with sufficient cooling capacity to ensure that the core of the workpiece has a high enough cooling rate. However, the cooling rate is large, and the internal stress of the workpiece is caused by uneven thermal expansion and contraction, which may deform or crack the workpiece. Therefore, the above two contradictory factors should be considered, and the quenching medium and cooling method should be selected reasonably. The cooling stage not only obtains a reasonable structure of the parts to achieve the required performance, but also maintains the size and shape accuracy of the parts, which is a key link in the quenching process. Quenching is an indispensable process in the process of smelting metal. The easiest way to quench is to quickly immerse the red-hot iron in cold water after hammering.
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