What is cryogenic and what is a cryogenic device What is a cryogenic unit

Is it just to take the heat-treated steel to a refrigerator-like cabinet and freeze it, and the temperature is extremely low (about minus 60-80 degrees). Our company has this thing.

With liquid nitrogen, air absorbs heat.

1. Cryogenic device: The device that can reach a very low temperature is called the cryogenic device, and we have air separation.

The minimum temperature of the equipment can reach -193 degrees, and the nitrogen liquefied orange lacks temperature.

2. Cryogenic, generally refers to the range of the Danhe temperature area of 233k-77k. 233K (about -40) is generally the lower temperature limit that can be effectively achieved by single-stage vapor compression refrigeration, and 77K (about -196) is liquid nitrogen.

Atmospheric boiling point temperature. Cryogenic is the temperature zone where liquid nitrogen is commonly used in practical applications to achieve refrigeration.

Summary. Pro-<>

Hello, cryogenic treatment, also known as ultra-low temperature treatment, is a new technology developed on the basis of ordinary cold treatment. As an extension of conventional heat treatment, cryogenic treatment usually uses liquid nitrogen as a refrigerant, and the material is treated below -130, and the microstructure of the material is changed by placing the workpiece in a specific low-temperature environment, so as to achieve the purpose of improving the material performance.

What else is cryogenic treatment called?

Hello dear <>, cryogenic treatment, also known as ultra-low temperature treatment, is a new technology developed on the basis of ordinary cold trace bending. As an extension of conventional heat treatment, cryogenic treatment usually uses Yuliang liquid nitrogen as the refrigerant, and the material is treated below -130, and the microstructure of the material is changed by placing the workpiece in a specific low-temperature environment, so as to achieve the purpose of improving the material performance.

Ok thanks.

Is there any other way to deal with it that is similar to cryogenic externality?

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316L stainless steel is an austenitic stainless steel that has excellent corrosion resistance due to the addition of 2-3% molybdenum, and is used in the marine industry. However, in the complex and volatile seawater environment, equipment made of 316L stainless steel is subject to corrosion and wear. 1.

After cryogenic treatment, the microstructure of 316L stainless steel is formed with a small amount of martensite, and the hardness increases by about 12%, the tensile strength increases by 6%, and the yield strength increases by 10%. 2.Cryogenic treatment reduces the galvanic corrosion properties of 316L stainless steel, both as a raw material and as a welding material.

3.After cryogenic treatment, the friction coefficient of 316L stainless steel is reduced to 25% due to the transformation of residual austenite to martensitic, and the wear performance is improved. According to the query, there is no similar cold treatment treatment at present, pro-<>

Cryogenic refers to temperatures below -100, while ultra-cryogenic refers to materials that need to be processed in an environment between -190°C and -230°C.

Cryogenic refers to the temperature below -100, which can be divided into gas liquefaction technology in the chemical industry and cryogenic treatment in the material industry. Mechanical methods are usually used, such as throttling expansion or adiabatic expansion, which can achieve low temperatures as low as -210; The low temperature of less than 1K can be obtained by adiabatic demagnetization. The equipment is a compressor, a heat exchanger, and an expander (or throttle valve).

Compressors and expanders are generally reciprocating or turbine type. The heat exchanger generally adopts snake tube type, column tube type or plate-fin type. Relying on deep freezing technology, the properties of substances at close to absolute zero can be studied and can be used for the liquefaction of gases and the separation of gas mixtures.

Ultra-cryogenic means that the material needs to be processed in an environment between -190°C and -230°C. (Non-liquid nitrogen medium, computerized temperature control and refrigeration throughout the process) Applicable materials: all metal or non-metallic materials, such as alloys, carbides, plastics (nylon and Teflon), aluminum, ceramics, etc.

Ultra-cryogenic technology: when the metal is hardened to the cooling process by heat treatment, the alloy and carbon in it are dissolved and combined and diffused to form austenite, during the cooling process, martensite is formed due to low temperature compression, and because the final transition point (MF) of martensite is very low, for example: the MF point of W18CR4V (high-speed tool steel) is more than -190°C, so a large amount of austenite will remain after quenching and cooling to room temperature, Therefore, the hardness, wear resistance and service life of the metal are reduced, and at the same time, the metal is easy to cause metal fragmentation due to the high brittleness of austenite, and in addition, there are many physical properties, especially thermal properties and magnetic properties.

I have only heard of cold treatment and cryogenic treatment, generally bounded by -96, and I have never heard of ultra-cryogen, which may now be a new definition.

The process temperature is different, the ordinary cold treatment temperature is 0 100, usually with dry ice, liquid ammonia (or methanol) and Freon compressor to refrigerate;

The cryogenic treatment temperature is -100 180, and the most commonly used cryogenic equipment is refrigerated with liquid nitrogen;

Ultra-cryogenic is a new process proposed in recent years, generally with a working temperature below -180, about -200, and liquid nitrogen equipment is also used. To put it bluntly, there has been a breakthrough in refrigeration technology, in order to distinguish it, it is called ultra-cryogen. The actual effect is better, but not obvious.

There are few companies that can really do ultra-cryogen, and the steel will not be given to you to do ultra-cold, in fact, the cryogen is done, and the steel has improved significantly.

The process temperature is different, and the name is different: cold treatment, ice cold treatment (within -78), cryogenic treatment (-130 - 180), ultra-deep cold treatment (-180 - 196).

It is the energy that promotes the transformation of martensite.

Cryogenic treatment refers to the process of materials at -190°C to -230°C. Suitable for all metallic or non-metallic materials, such as alloys, carbides, plastics (nylon and Teflon), aluminum, ceramics, etc.

Ultra-cryogenic technology: when the metal is hardened to the cooling process by heat treatment, the alloy and carbon in it are dissolved and combined and diffused to form austenite, during the cooling process, martensite is formed due to low temperature compression, and because the final transition point (MF) of martensite is very low, for example: the MF point of W18CR4V (high-speed tool steel) is more than -190°C, so a large amount of austenite will remain after quenching and cooling to room temperature, Therefore, the hardness, wear resistance and service life of the metal are reduced, and at the same time, the volume change caused by the microstructure transformation caused by the instability of the austenite causes the metal to fragment, and in addition, there are many physical properties, especially thermal properties and magnetic properties.

Cryogenic metal treatment originated in Switzerland for more than 100 years, when it was discovered that tools that had been frozen on ice and snow could last longer, and Swiss army knives, clocks, and Gillette blades were all beneficiaries of this process at that time. Beginning in the 60s of the 20th century, the United States, the Soviet Union, Japan and other countries began to study the metal cryogenic technology, and a large number of tests found that the cryogenic treatment effectively extended the life of the tool. In the 80s of the twentieth century, a number of specialized cryogenic companies in the United States, such as and ame cry, respectively, carried out cold treatment on tools, abrasives, gears, special springs, cemented carbide, high-speed steel, and cobalt-based alloys, and the experimental results showed that cryogenic treatment has a significant effect on the service life of the above material parts, which can be increased by 5 10 times.

In the middle of the 20th century, domestic research was carried out using alcohol + dry ice to carry out dimensional stability tests and applications of molds, measuring tools and tools. In the 90s, various institutes began to conduct full research and analysis on high-speed steel, die steel, cemented carbide and other materials, and the research showed that cryogenic treatment played a different role in improving the wear resistance, toughness, hardness, dimensional stability and corrosion resistance of these materials.

The role of cryogenic treatment:

1.Improve the hardness and strength of the workpiece.

2.Ensure the dimensional accuracy of the workpiece.

3.Improve the wear resistance of the workpiece.

4.Improve the impact toughness of the workpiece.

5.Improve the stress distribution in the workpiece and increase the fatigue strength.

6.Improve the corrosion resistance of the workpiece.

In China, there are cold treatment, ice cold treatment (within 78), cryogenic treatment (130-180), ultra-cryogenic treatment (180-196) and other names.

In foreign countries, it is usually called sub-zero, cryogenic treatment, deep cryogenic treatment, etc.

With the development of technology, lower temperatures will definitely be used for cold treatment in the future, such as liquid helium cryogenics. It is recommended to call it cryogenic treatment, but add the process temperature in front, just like we say 880 quenching and 1050 quenching.

Cryogenic technology and liquid cooling technology are both thermal management technologies, but their principles and application scenarios are different, and the specific differences are as follows:

1.The principle is different: cryogenic technology refers to the purpose of thermal management by reducing the temperature of the object, and its main principle is to use the refrigeration effect of inert gases such as nitrogen or helium.

Liquid cooling technology is to reduce the temperature of the heat source by flowing the liquid coolant near the heat source, absorbing the heat through the endothermic process of the coolant, and taking the heat away.

2.Different application scenarios: cryogenic technology has been widely used in semiconductors, superconducting materials, computer CPUs and other fields to reduce the temperature of electronic components and improve their performance and longevity.

Liquid cooling technology is mainly used in the cooling of high-power LED, CPU and other heat sources, such as in super-luck gaming computers, data centers and other occasions.

3.The effect is different: Cryogenic technology can operate at very low temperatures, so it can effectively reduce the temperature of the heat source and avoid hot spots from the heat source, resulting in a very high heat dissipation effect.

Liquid cooling, on the other hand, quickly removes heat through the liquid coolant, which is ideal for heat dissipation in most cases.

Shallow, medium and cryogenic refrigeration specifically refer toThe temperature range of artificial refrigeration。The temperature table for the artificial refrigeration temperature range is as follows:

Normal refrigeration : 120k

Deep refrigeration : 120 20k

Cryogenic refrigeration : 20 0 3k

Ultra-low temperature refrigeration: 0 3K or less.

Universal refrigeration classroom: temperature unit "k" encyclopedia

K" Kelvins, or absolute temperature scale, is a unit of temperature in the International System of Units. Kelvin temperature is often represented by the symbol k, and its unit is open.

Each 1k change is equivalent to a change of 1, and the starting point of the calculation is different. Celsius takes the temperature of the ice-water mixture as the starting point, while Kelvin uses absolute zero as the starting point for the calculation, ie.

Kelvin used to call it absolute temperature. The temperature of the triple point of water is, and it can also be said that Kelvin defines the temperature of the triple point of water as the temperature obtained after that.

Introduction to artificial refrigeration

Artificial refrigeration refers to an engineering technology that continuously dissipates heat from the cooling system (object or space) to the ambient medium by artificial methods, so that the cooled system can reach a lower temperature than the ambient medium, and maintain the necessary low temperature for a long time.

The three types of refrigeration are different according to the temperature.