Monthly Archives: March 2025

　　Ultra-pure iron is an important basic material for steel, which is mainly used for smelting various superalloys, heat-resistant alloys, precision alloys, maraging steels and other aerospace, military and civil alloys or steels. In recent years, it has developed extremely rapidly at home and abroad. Developing the preparation technology of high-purity iron can expand its application range.More importantly, put High purity Iron It is imperative for us to make thorough analysis and maximize its social function. https://www.slhpureiron.net

　　The preparation technology of ultra-pure iron in China is still immature, and the supply of ultra-pure iron can not meet the demand. However, it is studied to smelt ultra-pure iron with sponge iron as iron source in induction furnace. From the raw material point of view, the output of sponge iron is increasing and the price is relatively cheap. In terms of composition, the content of residual elements in sponge iron is low, and the purity of ultra-pure iron products is high.

　　In this paper, under the laboratory conditions, the experimental study on smelting ultra-pure iron with sponge iron in induction furnace was carried out with 25kg medium frequency induction furnace and 25kg vacuum induction furnace. The main research contents include the thermodynamics and kinetics of deep dephosphorization of sponge iron, the selection of dephosphorization slag system and the factors affecting deep dephosphorization of steel, etc. Pure iron with phosphorus content of about 10ppm is smelted from sponge iron in induction furnace.

　　On this basis, the thermodynamic conditions of deep desulfurization of steel are analyzed theoretically, and the effects of composition melting point of desulfurization slag system, mechanical mixed slag and premelted refining slag on desulfurization of steel are studied through experiments. Through theoretical analysis and experimental data, the conditions that must be met for deep desulfurization of molten steel are obtained, and finally the sulfur content in molten steel is reduced to about 10ppm in the induction furnace.

　　It is feasible to smelt ultra-pure iron with sponge iron or direct reduced iron in induction furnace as long as the thermodynamic conditions of dephosphorization and desulfurization are well controlled and the composition of smelting slag system is selected. If it can be applied to large-scale industrial production, it will have a good application prospect.

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SLH Pure Iron

SHANXI SHENG LONG HUA MAGNETIC MATERIAL CO.,LTD

Email: sales@slhpureiron.com

WhatsApp: +86 13410953850

WeChat: SLHPUREIRON

　　Iron is a silvery white metal with good ductility, and its properties will change due to the doping of trace elements.Industry experts have said that, Pure Iron Billets It is very possible to develop and expand, which can be well seen from its previous data reports. https://www.slhpureiron.net

　　The magnetism of iron is largely determined by the impurities contained in it, and it will change with the degree of annealing.

　　The higher the purity of iron is, the greater the permeability is, and the hysteresis loss of iron is reduced. Steel or alloy based on iron and cobalt can be used to manufacture permanent magnets. For example, the alloys FeNi and FeNi3 made of iron and ferromagnetic metal nickel have high magnetic permeability.

　　Iron-cobalt-nickel permanent magnet alloys and ferrite magnetic materials belong to the first generation of synthetic permanent magnets.

　　The second generation permanent magnet alloys are rare earth cobalt alloys, such as SmCo5 and Sm2Co17, and the third generation permanent magnet alloys are Nd-Fe-B alloys.

　　Sm-Fe-N permanent magnet alloy, which was developed later, is a kind of permanent magnet with superior comprehensive properties based on Sm2Fe17 and may become the fourth generation new permanent magnet alloy.

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SLH Pure Iron

SHANXI SHENG LONG HUA MAGNETIC MATERIAL CO.,LTD

Email: sales@slhpureiron.com

WhatsApp: +86 13410953850

WeChat: SLHPUREIRON

　　The preparation of nano-materials has always been a research hotspot and a research difficulty in the field of nano-technology. Although a variety of preparation methods of nano-materials have been developed, and great progress has been made in their preparation technology, due to the complex preparation process, high cost, small material size, internal holes and pollution, it is difficult to obtain integral metal materials with nano-particle size so far.understand High purity Iron In order to better serve customers and reflect the core competitiveness of products. https://www.slhpureiron.net

　　Therefore, how to prepare nano-materials with fewer defects by simpler and lower-cost means has become the pursuit goal in this field. In recent years, surface mechanical abrasion treatment (SMAT) has become a new method for preparing nano-materials. The nanocrystalline samples obtained by this method have a grain size within 100nm in a certain depth of the surface layer, and have a gradient structure of gradual transition between nano-,sub-micron and deformed grain layers, and are pollution-free and void-free.

　　Nanomaterials prepared by SMAT method have many potential application values because of the above characteristics, and have been applied in diffusion welding, surface alloying and nitriding. Self-nanocrystallization of various metals and alloys has been successfully achieved by SMAT method. Ultrasonic shot peening (USSP) is widely used in the preparation of nanomaterials by SMAT method, while Highenergyshotpeening,HESP (HESP) is seldom used.

　　Although some people have realized the surface self-nanocrystallization of pure iron by USSP, there is no report on the surface self-nanocrystallization of pure iron by HESP method. A severely plastic deformation layer with a certain thickness was obtained on the surface of industrial pure iron by HESP method.

　　By analyzing and characterizing the structure and properties of this severely plastic deformation layer, it was confirmed that a nanocrystalline layer with a certain thickness was obtained on the surface of industrial pure iron, and the surface of industrial pure iron was self-nanocrystallized.

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SLH Pure Iron

SHANXI SHENG LONG HUA MAGNETIC MATERIAL CO.,LTD

Email: sales@slhpureiron.com

WhatsApp: +86 13410953850

WeChat: SLHPUREIRON

　　Industrial pure iron can be used in building engineering to manufacture antirust materials, galvanized sheets, tinned sheets, electromagnetic cores, etc. Some industrial pure iron also contains copper (0.25% ~ 0.30%) to increase corrosion resistance. Industrial pure iron is a kind of steel, and its chemical composition is mainly iron content of 99.50%-99.90%, carbon content below 0.04%, and the less other elements, the better.On the other hand, Armco Iron It also brings tangible benefits to everyone and feels useful. It is a model of the industry. https://www.slhpureiron.net

　　Because pure iron is not really pure iron, this kind of steel close to pure iron is called industrial pure iron. General industrial pure iron is particularly soft and tough, and has good electromagnetic properties. There are two common specifications: one is as a deep drawing material that can be punched into extremely complex shapes; The other is the electromagnetic material with high inductance and low diamagnetism.

　　Industrial pure iron

　　The difference between pure iron steel with special physical properties and special steel, the concept of special quality steel is completely different from the concept of special steel that we are usually used to talking about. Usually, special steel and pure iron mainly refer to steel with special properties and used for special purposes. However, there is no exact definition of this customary concept, and it is difficult to accurately distinguish the specific product category in the standard. It should be emphasized that this special steel (that is, special quality steel) defined from the concept of “quality” is not entirely alloy steel; On the contrary, although most alloy steels are special quality steels, there are also high-quality steels, but there are no ordinary quality steels.

　　Industrial pure iron is a kind of steel, its chemical composition is mainly iron, the content is 99.50%-99.90%, the carbon content is below 0.04%, and the less other elements, the better. Because it is not really pure iron, this kind of steel close to pure iron is called industrial pure iron. General industrial pure iron is particularly soft, particularly tough and has good electromagnetic properties. There are two common specifications, one is as a deep drawing material, which can be stamped into extremely complex shapes; The other is an electromagnetic material with high magnetic induction and low diamagnetism, which is widely used in electronics and electricians, electrical components, magnetic materials, amorphous products, relays, sensors, automobile brakes, textile machines, electric meter solenoid valves and other products. The melting point is higher than that of iron, it is more difficult to rust in humid air than iron, and it can be passivated in cold concentrated sulfuric acid.

WWW.SLHPUREIRON.COM

SLH Pure Iron

SHANXI SHENG LONG HUA MAGNETIC MATERIAL CO.,LTD

Email: sales@slhpureiron.com

WhatsApp: +86 13410953850

WeChat: SLHPUREIRON

　　Ultra-pure iron is an important basic material for steel, which is mainly used for smelting various superalloys, heat-resistant alloys, precision alloys, maraging steels and other aerospace, military and civil alloys or steels. In recent years, it has developed extremely rapidly at home and abroad. Developing the preparation technology of high-purity iron can expand its application range.In order to open the market, Armco Iron Constantly improve the ability of business development and create an extraordinary brand image for it. https://www.slhpureiron.net

　　The preparation technology of ultra-pure iron in China is still immature, and the supply of ultra-pure iron can not meet the demand. However, it is studied to smelt ultra-pure iron with sponge iron as iron source in induction furnace. From the raw material point of view, the output of sponge iron is increasing and the price is relatively cheap. In terms of composition, the content of residual elements in sponge iron is low, and the purity of ultra-pure iron products is high.

　　In this paper, under the laboratory conditions, the experimental study on smelting ultra-pure iron with sponge iron in induction furnace was carried out with 25kg medium frequency induction furnace and 25kg vacuum induction furnace. The main research contents include the thermodynamics and kinetics of deep dephosphorization of sponge iron, the selection of dephosphorization slag system and the factors affecting deep dephosphorization of steel, etc. Pure iron with phosphorus content of about 10ppm is smelted from sponge iron in induction furnace.

　　On this basis, the thermodynamic conditions of deep desulfurization of steel are analyzed theoretically, and the effects of composition melting point of desulfurization slag system, mechanical mixed slag and premelted refining slag on desulfurization of steel are studied through experiments. Through theoretical analysis and experimental data, the conditions that must be met for deep desulfurization of molten steel are obtained, and finally the sulfur content in molten steel is reduced to about 10ppm in the induction furnace.

　　It is feasible to smelt ultra-pure iron with sponge iron or direct reduced iron in induction furnace as long as the thermodynamic conditions of dephosphorization and desulfurization are well controlled and the composition of smelting slag system is selected. If it can be applied to large-scale industrial production, it will have a good application prospect.

WWW.SLHPUREIRON.COM

SLH Pure Iron

SHANXI SHENG LONG HUA MAGNETIC MATERIAL CO.,LTD

Email: sales@slhpureiron.com

WhatsApp: +86 13410953850

WeChat: SLHPUREIRON

　　Ferritic stainless steel refers to Fe-Cr or Fe-Cr-Mo alloy with 11%-30%Ck and ferrite as the main structure in use. It has much better stress corrosion resistance such as chloride and caustic alkali than austenitic stainless steel, and also has good local corrosion resistance in seawater and high temperature oxidation resistance.consequently Cathode Flat I also got a lot of attention and wanted to join the ranks. https://www.slhpureiron.net

　　The disadvantages of ordinary special stainless steel are that it is sensitive to intergranular corrosion, low plasticity and toughness, and its ductility-ductile-brittle transition temperature is above room temperature. Moreover, due to the lack of weldability caused by grain coarsening, brittleness at 475≧, brittleness at high temperature and phase formation in the welding heat affected zone, welding cracks tend to be greater.

　　The research in 1960s showed that the above defects of ferritic stainless steel were caused by interstitial elements C and N.. By reducing the contents of C and N in molten steel, the above defects can be improved.

　　Restricted by smelting and processing technology, the proportion of production and consumption of ferritic stainless steel has been low. In 2003, the global output of crude stainless steel was 22.8 million tons, with 400 series stainless steel accounting for about 21%. In 2003, the output of stainless steel in China was about 1.778 million tons, with 400 series stainless steel accounting for about 10%.

　　In recent years, the development and application of ferritic stainless steel has been paid more and more attention at home and abroad. The main reasons are as follows: 1. The serious shortage of Ni resources and the large fluctuation of Ni price have led to a sharp increase in the production cost of 300 series stainless steel, and the supply of raw materials is not guaranteed; 2. With the progress of production equipment and technology, ferritic stainless steel with excellent performance can be produced to replace some varieties of 300 series; 3. Stainless steel containing Ni is harmful to human body, such as allergic reaction to skin.

　　Ultra-pure ferritic stainless steel is mainly used in automobile manufacturing, kitchen equipment, household appliances, architectural decoration, chemical equipment and hardware products.

WWW.SLHPUREIRON.COM

SLH Pure Iron

SHANXI SHENG LONG HUA MAGNETIC MATERIAL CO.,LTD

Email: sales@slhpureiron.com

WhatsApp: +86 13410953850

WeChat: SLHPUREIRON

　　Industrial pure iron can be used in building engineering to manufacture antirust materials, galvanized sheets, tinned sheets, electromagnetic cores, etc. Some industrial pure iron also contains copper (0.25% ~ 0.30%) to increase corrosion resistance. Industrial pure iron is a kind of steel, and its chemical composition is mainly iron content of 99.50%-99.90%, carbon content below 0.04%, and the less other elements, the better.So, Cathode Flat On the contrary, there is still a lot of room to play. https://www.slhpureiron.net

　　Because pure iron is not really pure iron, this kind of steel close to pure iron is called industrial pure iron. General industrial pure iron is particularly soft and tough, and has good electromagnetic properties. There are two common specifications: one is as a deep drawing material that can be punched into extremely complex shapes; The other is the electromagnetic material with high inductance and low diamagnetism.

　　Industrial pure iron

　　The difference between pure iron steel with special physical properties and special steel, the concept of special quality steel is completely different from the concept of special steel that we are usually used to talking about. Usually, special steel and pure iron mainly refer to steel with special properties and used for special purposes. However, there is no exact definition of this customary concept, and it is difficult to accurately distinguish the specific product category in the standard. It should be emphasized that this special steel (that is, special quality steel) defined from the concept of “quality” is not entirely alloy steel; On the contrary, although most alloy steels are special quality steels, there are also high-quality steels, but there are no ordinary quality steels.

　　Industrial pure iron is a kind of steel, its chemical composition is mainly iron, the content is 99.50%-99.90%, the carbon content is below 0.04%, and the less other elements, the better. Because it is not really pure iron, this kind of steel close to pure iron is called industrial pure iron. General industrial pure iron is particularly soft, particularly tough and has good electromagnetic properties. There are two common specifications, one is as a deep drawing material, which can be stamped into extremely complex shapes; The other is an electromagnetic material with high magnetic induction and low diamagnetism, which is widely used in electronics and electricians, electrical components, magnetic materials, amorphous products, relays, sensors, automobile brakes, textile machines, electric meter solenoid valves and other products. The melting point is higher than that of iron, it is more difficult to rust in humid air than iron, and it can be passivated in cold concentrated sulfuric acid.

WWW.SLHPUREIRON.COM

SLH Pure Iron

SHANXI SHENG LONG HUA MAGNETIC MATERIAL CO.,LTD

Email: sales@slhpureiron.com

WhatsApp: +86 13410953850

WeChat: SLHPUREIRON

　　Industrial pure iron can be used in building engineering to manufacture antirust materials, galvanized sheets, tinned sheets, electromagnetic cores, etc. Some industrial pure iron also contains copper (0.25% ~ 0.30%) to increase corrosion resistance. Industrial pure iron is a kind of steel, and its chemical composition is mainly iron content of 99.50%-99.90%, carbon content below 0.04%, and the less other elements, the better.With the expanding influence of the industry, Armco Iron Our business is also constantly spreading, and the development of the market is also gradually advancing. https://www.slhpureiron.net

　　Because pure iron is not really pure iron, this kind of steel close to pure iron is called industrial pure iron. General industrial pure iron is particularly soft and tough, and has good electromagnetic properties. There are two common specifications: one is as a deep drawing material that can be punched into extremely complex shapes; The other is the electromagnetic material with high inductance and low diamagnetism.

　　Industrial pure iron

　　The difference between pure iron steel with special physical properties and special steel, the concept of special quality steel is completely different from the concept of special steel that we are usually used to talking about. Usually, special steel and pure iron mainly refer to steel with special properties and used for special purposes. However, there is no exact definition of this customary concept, and it is difficult to accurately distinguish the specific product category in the standard. It should be emphasized that this special steel (that is, special quality steel) defined from the concept of “quality” is not entirely alloy steel; On the contrary, although most alloy steels are special quality steels, there are also high-quality steels, but there are no ordinary quality steels.

　　Industrial pure iron is a kind of steel, its chemical composition is mainly iron, the content is 99.50%-99.90%, the carbon content is below 0.04%, and the less other elements, the better. Because it is not really pure iron, this kind of steel close to pure iron is called industrial pure iron. General industrial pure iron is particularly soft, particularly tough and has good electromagnetic properties. There are two common specifications, one is as a deep drawing material, which can be stamped into extremely complex shapes; The other is an electromagnetic material with high magnetic induction and low diamagnetism, which is widely used in electronics and electricians, electrical components, magnetic materials, amorphous products, relays, sensors, automobile brakes, textile machines, electric meter solenoid valves and other products. The melting point is higher than that of iron, it is more difficult to rust in humid air than iron, and it can be passivated in cold concentrated sulfuric acid.

WWW.SLHPUREIRON.COM

SLH Pure Iron

SHANXI SHENG LONG HUA MAGNETIC MATERIAL CO.,LTD

Email: sales@slhpureiron.com

WhatsApp: +86 13410953850

WeChat: SLHPUREIRON

　　Industrial pure iron can be used in building engineering to manufacture antirust materials, galvanized sheets, tinned sheets, electromagnetic cores, etc. Some industrial pure iron also contains copper (0.25% ~ 0.30%) to increase corrosion resistance. Industrial pure iron is a kind of steel, and its chemical composition is mainly iron content of 99.50%-99.90%, carbon content below 0.04%, and the less other elements, the better.In the eyes of industry experts, Cathode Flat Indeed, it has great development potential, which makes many investors more interested. https://www.slhpureiron.net

　　Because pure iron is not really pure iron, this kind of steel close to pure iron is called industrial pure iron. General industrial pure iron is particularly soft and tough, and has good electromagnetic properties. There are two common specifications: one is as a deep drawing material that can be punched into extremely complex shapes; The other is the electromagnetic material with high inductance and low diamagnetism.

　　Industrial pure iron

　　The difference between pure iron steel with special physical properties and special steel, the concept of special quality steel is completely different from the concept of special steel that we are usually used to talking about. Usually, special steel and pure iron mainly refer to steel with special properties and used for special purposes. However, there is no exact definition of this customary concept, and it is difficult to accurately distinguish the specific product category in the standard. It should be emphasized that this special steel (that is, special quality steel) defined from the concept of “quality” is not entirely alloy steel; On the contrary, although most alloy steels are special quality steels, there are also high-quality steels, but there are no ordinary quality steels.

　　Industrial pure iron is a kind of steel, its chemical composition is mainly iron, the content is 99.50%-99.90%, the carbon content is below 0.04%, and the less other elements, the better. Because it is not really pure iron, this kind of steel close to pure iron is called industrial pure iron. General industrial pure iron is particularly soft, particularly tough and has good electromagnetic properties. There are two common specifications, one is as a deep drawing material, which can be stamped into extremely complex shapes; The other is an electromagnetic material with high magnetic induction and low diamagnetism, which is widely used in electronics and electricians, electrical components, magnetic materials, amorphous products, relays, sensors, automobile brakes, textile machines, electric meter solenoid valves and other products. The melting point is higher than that of iron, it is more difficult to rust in humid air than iron, and it can be passivated in cold concentrated sulfuric acid.

WWW.SLHPUREIRON.COM

SLH Pure Iron

SHANXI SHENG LONG HUA MAGNETIC MATERIAL CO.,LTD

Email: sales@slhpureiron.com

WhatsApp: +86 13410953850

WeChat: SLHPUREIRON

　　Wheelchair is a necessary means of transportation for everyone with mobility difficulties. Without it, we will be unable to move. Use wheelchairs correctly and master certain skills. It will greatly help us to take care of ourselves. Do you know what the common sense of using electric wheelchairs is? What are the precautions for using an electric wheelchair?Today, people are interested in 電動輪椅 There are also many dependencies, and the expectations for products are getting higher and higher. https://www.hohomedical.com/collections/light-weight-wheelchair

　　Precautions for using electric wheelchairs:

　　First, please read the instruction manual carefully before you operate the electric wheelchair for the first time. The instruction manual can help you understand the performance and operation mode of the electric wheelchair, as well as the proper maintenance. Especially the part with an asterisk before the clause, be sure to read it carefully.

　　Second, don’t use batteries with different capacities. Don’t use different brands and types of batteries. Replace all batteries together, and don’t mix old and new batteries. Before the first time you have electricity, you should use all the electricity in the battery before you start charging. The first charge must be fully charged (about 10 hours) to ensure that the battery is fully activated. Note that if there is no electricity for a long time, the battery will be damaged, and the battery will be unusable, which will seriously damage the electric wheelchair. Therefore, check whether the power supply is sufficient before use, and charge it when the power is insufficient.

　　Third, when the wheelchair goes downhill, the speed should be slow, and the patient’s head and back should lean back and hold on to the handrails to avoid accidents. Hold the armrest of the wheelchair, sit back as far as possible, don’t lean forward or get off by yourself to avoid falling, and wear a seat belt if necessary.

　　Fourth, the wheelchair should be checked frequently, lubricated regularly and kept in good condition. Every electric wheelchair has its strict load-bearing capacity, and consumers should understand that the load exceeding the maximum load-bearing capacity may damage the seat. Frame, fastener, folding mechanism, etc. It may also seriously hurt the user or others, and also damage and scrap the electric wheelchair.

　　Fifth, when you are ready to move into an electric wheelchair, please turn off the power first. Otherwise, if you touch the joystick, it may cause the electric wheelchair to move unexpectedly. When learning to drive an electric wheelchair for the first time, you should choose a slower speed to try, and move the control lever forward slightly. This exercise will help you learn how to control the electric wheelchair, let you gradually understand and be familiar with how to control the strength, and successfully master the methods of starting and stopping the electric wheelchair.