Monthly Archives: March 2025

　　Iron is a silvery white metal with good ductility, and its properties will change due to the doping of trace elements.Without exception, Armco Iron Our customers are willing to purchase their products, because high quality is the concept of their products. 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.

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.beyond doubt Armco Iron It will definitely lead the development direction of the whole industry and let its light bloom in this field. 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

　　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.I think Pure Iron Billets It will definitely become a leader in the industry and look forward to the high-end products. 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

　　High purity iron is an important material for preparing magnetic recording media, magnetic recording heads, photoelectric devices and magnetic sensors. The new environmentally friendly semiconductor material B-FeSi2 requires higher purity of iron.Actually, it’s not just this reason, Armco Iron Its own advantages are also obvious, and it is normal for the market to perform well. https://www.slhpureiron.net

　　High purity iron also has many unique properties, such as insoluble in hydrochloric acid and sulfuric acid, but soluble in nitric acid; It is difficult to cut high-purity iron ingots with traditional saw blades. High purity Fe-Cr alloy ingot is a structural-functional integrated material with incredible plasticity, strength, corrosion resistance, low expansion coefficient and high thermal conductivity.

　　Because iron itself is non-toxic, rich in resources and low in price, and iron silicide can be used to manufacture light-emitting elements in the infrared field, scientists are studying and developing high-purity iron as an optical semiconductor material.

　　In view of the important application and potential application value of high-purity iron, the preparation and research of high-purity iron has become a hot spot in the research of high-purity metals.

　　In the middle and late 1990s, research on the preparation technology of high-purity iron was widely carried out in the world, including Japan, France, Germany and the United States. Since 1994, seven international conferences on high purity metals (UHPM) have been held.

　　The research activities of high-purity iron in Japan have also been valued and funded by a large number of enterprises, research institutes and government agencies, and many important achievements have been made. They have successfully extracted iron with a purity of 6N. At present, the preparation of high-purity iron is still in the laboratory stage, and how to industrialize it is a direction that needs to be worked hard in the future.

WWW.SLHPUREIRON.COM

SLH Pure Iron

SHANXI SHENG LONG HUA MAGNETIC MATERIAL CO.,LTD

Email: sales@slhpureiron.com

WhatsApp: +86 13410953850

WeChat: SLHPUREIRON

　　High-purity iron is mainly composed of iron and contains a small amount of impurities.pass Armco Iron It can be seen from the present situation that the market prospect is relatively broad, which is conducive to our reference and investment. https://www.slhpureiron.net

　　First, the preparation process of high purity iron

　　High purity iron is prepared by direct reduction of furnace wall. In this method, iron oxides are converted into pure iron by reduction reaction at high temperature, and halogen compounds are used to absorb impurities. After several purification treatments, high-purity iron materials with purity over 99.995% can be obtained.

　　Second, the characteristics of high purity iron

　　High purity iron is very high, so it has good magnetism, conductivity and corrosion resistance. At the same time, high-purity iron has excellent thermal expansion and stable material properties. High purity iron materials are usually used in high-tech fields, such as electronic components, hard disk drives and semiconductor manufacturing.

　　Third, the application fields of high-purity iron

　　High-purity iron is often used to manufacture high-tech products, which are widely used in electronics, optoelectronics, aerospace and other fields. High-purity iron can be used to make magnetic core materials, used in the manufacture of electronic components such as power transformers, power inductors and high-frequency inductors. At the same time, high-purity iron can also be used to make aircraft thermal insulation materials and high-power ceramic wear-resistant materials.

　　IV. Comparison of High Pure Iron with Other Materials

　　Compared with other materials, high-purity iron has higher purity and better stability, magnetism and conductivity. However, in some aspects, such as mechanical strength and heat resistance, some alloy materials or different metal materials may be more suitable.

　　In a word, high-purity iron is a kind of high-purity iron material, which has been widely used because of its excellent properties. With the continuous development of technology in various fields, people’s demand for high-purity iron materials is increasing.

WWW.SLHPUREIRON.COM

SLH Pure Iron

SHANXI SHENG LONG HUA MAGNETIC MATERIAL CO.,LTD

Email: sales@slhpureiron.com

WhatsApp: +86 13410953850

WeChat: SLHPUREIRON

　　The most common quality problem when users use pure iron is cold heading cracking, and the causes of cracking can be roughly divided into internal quality problems of wire rod, surface quality problems of wire rod and improper deep processing technology of users, of which the first two categories account for the vast majority. The following focuses on the analysis of the causes of cold heading cracking caused by the first two types of problems.This means that Pure Iron Billets It is the weather vane of the industry and can bring people great self-confidence. https://www.slhpureiron.net

　　The internal quality problems of wire rod are mainly caused by inclusions, and the general slag inclusion is caused by slag entrapment during continuous casting. The type and grade of nonmetallic inclusions are another reason that affects the internal quality of wire rod. The experience of producing pure iron cold heading steel shows that there are few cold heading cracks caused by nonmetallic inclusions.

　　Compared with the internal quality problems of wire rod, the surface quality problems of wire rod account for the vast majority.

　　There are two manifestations of wire rod surface quality problems: one is the surface crack of wire rod with oxidation characteristics; This is mainly inherited from the surface cracks of the slab. Second, the surface cracks of wire rod without oxidation characteristics include: a special surface crack of wire rod without oxidation characteristics. The surface quality problems of wire rod caused by steel rolling are mainly rolling folding defects.

　　Measures taken:

　　First, steelmaking and continuous casting

　　Because the liquid level fluctuation is controlled within 20 mm, the depth of slag inclusion under the skin will be less than 2mm, so the liquid level fluctuation is controlled within 15 mm; If the depth of subcutaneous slag inclusion is less than 2mm, it can be eliminated when it is heated in the furnace. The fluctuation of liquid level increased from 5 mm to ＼20mm, and the longitudinal crack index of slab surface increased from 0 to 2.0. Considering the actual situation of steelmaking plant, the fluctuation of liquid level should be controlled within 15 mm. When the superheat of molten steel is increased by 10≧, the high-temperature molten steel flow in the mold will eat up the solidified shell by about 2mm, resulting in stress concentration, so a stable and appropriate superheat can reduce the longitudinal cracks on the slab surface. Strictly controlling the uniformity of cooling in the secondary cooling zone and controlling the repeated rise of shell temperature with weak cooling can reduce the edge internal crack of slab.

　　Second, steel rolling

　　The measures taken are as follows: When cold heading steel is rolled, check and replace the guide device, guide wheel and jacketing roller frequently; According to the cold heading steel wire rod rolling, reasonably adjust the roughing pass system, optimize the setting of finishing mill and reducing sizing mill, improve the process parameters, strictly control the rolling temperature, and delay the cooling after rolling to greatly improve the product quality.

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.in fact Armco Iron It is more and more welcomed by our customers, and its market performance is gradually improving. 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

　　High-purity iron is mainly composed of iron and contains a small amount of impurities.If we can practice these points, Armco Iron Will be unique, become a leader in the industry, and keep moving forward. https://www.slhpureiron.net

　　First, the preparation process of high purity iron

　　High purity iron is prepared by direct reduction of furnace wall. In this method, iron oxides are converted into pure iron by reduction reaction at high temperature, and halogen compounds are used to absorb impurities. After several purification treatments, high-purity iron materials with purity over 99.995% can be obtained.

　　Second, the characteristics of high purity iron

　　High purity iron is very high, so it has good magnetism, conductivity and corrosion resistance. At the same time, high-purity iron has excellent thermal expansion and stable material properties. High purity iron materials are usually used in high-tech fields, such as electronic components, hard disk drives and semiconductor manufacturing.

　　Third, the application fields of high-purity iron

　　High-purity iron is often used to manufacture high-tech products, which are widely used in electronics, optoelectronics, aerospace and other fields. High-purity iron can be used to make magnetic core materials, used in the manufacture of electronic components such as power transformers, power inductors and high-frequency inductors. At the same time, high-purity iron can also be used to make aircraft thermal insulation materials and high-power ceramic wear-resistant materials.

　　IV. Comparison of High Pure Iron with Other Materials

　　Compared with other materials, high-purity iron has higher purity and better stability, magnetism and conductivity. However, in some aspects, such as mechanical strength and heat resistance, some alloy materials or different metal materials may be more suitable.

　　In a word, high-purity iron is a kind of high-purity iron material, which has been widely used because of its excellent properties. With the continuous development of technology in various fields, people’s demand for high-purity iron materials is increasing.

WWW.SLHPUREIRON.COM

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.contemporaneity High purity Iron Our competitors have not made large-scale improvements, so we should get ahead of everyone in the project. 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.

WWW.SLHPUREIRON.COM

SLH Pure Iron

SHANXI SHENG LONG HUA MAGNETIC MATERIAL CO.,LTD

Email: sales@slhpureiron.com

WhatsApp: +86 13410953850

WeChat: SLHPUREIRON

　　High-purity iron is mainly composed of iron and contains a small amount of impurities.At first, High purity Iron It developed out of control and gradually opened up a sky of its own. https://www.slhpureiron.net

　　First, the preparation process of high purity iron

　　High purity iron is prepared by direct reduction of furnace wall. In this method, iron oxides are converted into pure iron by reduction reaction at high temperature, and halogen compounds are used to absorb impurities. After several purification treatments, high-purity iron materials with purity over 99.995% can be obtained.

　　Second, the characteristics of high purity iron

　　High purity iron is very high, so it has good magnetism, conductivity and corrosion resistance. At the same time, high-purity iron has excellent thermal expansion and stable material properties. High purity iron materials are usually used in high-tech fields, such as electronic components, hard disk drives and semiconductor manufacturing.

　　Third, the application fields of high-purity iron

　　High-purity iron is often used to manufacture high-tech products, which are widely used in electronics, optoelectronics, aerospace and other fields. High-purity iron can be used to make magnetic core materials, used in the manufacture of electronic components such as power transformers, power inductors and high-frequency inductors. At the same time, high-purity iron can also be used to make aircraft thermal insulation materials and high-power ceramic wear-resistant materials.

　　IV. Comparison of High Pure Iron with Other Materials

　　Compared with other materials, high-purity iron has higher purity and better stability, magnetism and conductivity. However, in some aspects, such as mechanical strength and heat resistance, some alloy materials or different metal materials may be more suitable.

　　In a word, high-purity iron is a kind of high-purity iron material, which has been widely used because of its excellent properties. With the continuous development of technology in various fields, people’s demand for high-purity iron materials is increasing.

WWW.SLHPUREIRON.COM

SLH Pure Iron

SHANXI SHENG LONG HUA MAGNETIC MATERIAL CO.,LTD

Email: sales@slhpureiron.com

WhatsApp: +86 13410953850

WeChat: SLHPUREIRON