Ferro boron is an important alloy material, composed of iron and boron, with high hardness, high strength, high wear resistance and high corrosion and other excellent properties, so it is widely used in aerospace, automotive and machinery fields.
Preparation method of ferro boron
Mainly by powder metallurgy, melting and chemical vapor deposition method. Powder metallurgy is one of the most commonly used preparation methods.
The steps of the method include: mixing iron powder and boron powder in a certain proportion, and then sintering at high temperature, and finally get a boron-iron alloy. The method of melting is to melt iron and boron directly and then cool to form. Chemical vapor deposition (CVD) is the decomposition of organic compounds of iron and boron at high temperatures to form a ferro boron alloy.
Iron boride has many excellent properties, such as high hardness, high strength, high wear resistance and high corrosion resistance. Hardness is one of the most prominent properties of iron boride. The hardness of iron boron reaches HRC60-70, which is much higher than the hardness of ordinary steel. In addition, iron boron also has good wear resistance and corrosion resistance, can be used in harsh environments for a long time.
Because of its excellent properties, iron boride is widely used in aerospace, automotive and machinery fields. In the aerospace field, iron boron can be used to manufacture high-temperature structural parts and engine blades. In the automotive sector, iron boron can be used to manufacture engine components as well as braking and steering systems. In the field of machinery can be used to manufacture tools, bearings and gears.
|60-80 mesh or on-demand processing
|Suitable for steel manking,casting and other uses for the production of boron added agent
Method and quantity of adding iron boride in steelmaking
Boron is very easy to combine with oxygen and nitrogen in steel, usually added when the steel is coming out, and an appropriate amount of aluminum and titanium must be added to the steel before adding boron to deoxidize and stabilize nitrogen. Boron addition method: 1) Generally in the steel process to add iron boron to the ladle, then the operation of steel first to pull out the steel mouth, shaking the furnace speed is a little faster, at the same time, the slag operation, must let the steel first flow into the ladle, when the ladle has about one-third of the steel to add iron boron (input or insert). Then let the slag flow out.
The method of slag blocking in front of the furnace: firstly, add several spades of lime at the steel outlet, and block the steel outlet with a wood chip rake of slag scraping, and then quickly shake the furnace to produce steel. 2) After adding aluminum or titanium, insert iron boride in front of the furnace, and then stir, and then produce steel. At this time, the iron boron should be tied firmly on the iron bar, and the outside should be wrapped with aluminum skin or horse manure paper, and the steel should be inserted as quickly as possible to avoid the oxidation loss of boron in the slag. The boron recovery of the above two methods is similar, generally 45% to 85%, and in some cases it will be higher. From the point of view of the uniformity of boron in steel and the inherent quality of steel, the latter method is better.
Effect of boron content on properties of iron boride
The boron content of iron boride has significant influence on its properties
The hardness of iron boride increases with the increase of boron content. The chemical properties of boron and iron can form a relatively firm solid solution in the lattice, so that the iron boron has a higher hardness, can moderately improve the boron content, so as to improve the cutting performance and wear resistance of iron boron.
The melting point of ferric boron increases with the increase of boron content. The melting point of ferric boride mainly depends on the lattice structure and phase transition characteristics. The increase of boron content will increase the melting point, which is very important for improving the high stability and heat resistance of iron boron.
The magnetic properties and hot spot properties of ferro boron are affected by the content of boron. An appropriate amount of boron can affect the magnetic and thermoelectric properties of ferro boron. The increase of boron content can improve the magnetic properties of ferro boron and its application in thermoelectric devices.
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