What is gray iron What is similar to gray iron

A type of pig iron, also known as cast pig iron. The carbon content is about 3, and the silicon content is about 2. The cross-section is dark gray and is usually called gray iron.

Carbon exists in this iron alloy in the form of flakes of graphite. The quality is soft, and it can be cut. It is easy to flow when hot, and has good casting performance.

More wear-resistant. Poor strength and ductility. Because graphite is soft and lubricating, this pig iron has the advantages of good cutting, wear resistance and casting properties.

However, due to the existence of flake graphite, its tensile strength is reduced, so that it cannot be forged, and can only be used to manufacture various castings, such as casting machine beds, iron pipes, etc.

This type of pig iron is usually called cast pig iron (cast iron for short).

There are also ductile iron, malleable cast iron.

In addition to the wear resistance of cast iron (such as EDM quenching on the mechanical sliding rail surface to improve hardness and wear resistance), the main reason is its stability and not easy to deform, so some important equipment and testing platforms use cast iron materials.

Gray iron, a type of pig iron. The carbon content is about 3, and the silicon content is about 2. The carbon in the gray iron exists in the form of flake graphite.

The section is dark gray. The quality is soft, and it can be cut. It is easy to flow when hot, and has good casting performance.

More wear-resistant. Poor strength and ductility. Mainly used for casting.

There is a more detailed introduction in high school chemistry textbooks.

Summary. Dear, I'm glad to answer for you: the difference between gray iron and bread iron? A: Good morning, kiss! <>

Gray iron is a type of pig iron, also known as cast pig iron. The carbon content is about 3, and the silicon content is about 2. The cross-section is dark gray and is usually called gray iron.

1. Bread iron is iron produced by reducing gases such as carbon monoxide and hydrogen when iron ore or pellets are below the melting point, with low carbon content and can be used for steelmaking. 2. Bread iron, a mechanical forging and casting term, usually refers to relatively large pieces of iron that have not been melted. It also refers to a piece of iron or iron plate that has been melted but not used.

Bread iron pot is harmless to the human body, pig iron generally refers to the alloy of iron with a carbon content of 2. Also known as cast iron. In addition to carbon, pig iron also contains silicon, manganese and a small amount of sulfur and phosphorus, etc., which can be cast but not malleable.

According to the different forms of carbon in pig iron, it can be divided into steelmaking pig iron, cast pig iron and ductile iron. Generally, the carbon content is less than wrought iron or pure iron, the content is called steel, and the content is more than 2% pig iron. Wrought iron is soft, good plasticity, easy to deform, low strength and hardness, and is not widely used; Pig iron contains a lot of carbon, is hard and brittle, and has almost no plastic**Thank you for your patience.

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What is the difference between gray iron and bread iron?

Is the bread iron pot harmful to the human body?

Dear, I'm glad to answer for you: the difference between gray iron and bread iron? A: Good morning, kiss! <>

Gray iron is a type of pig iron, also known as cast pig iron. The carbon content is about 3, and the silicon content is about 2. The cross-section is dark gray and is usually called gray iron.

1. Bread iron is iron produced by reducing gases such as carbon monoxide and hydrogen when iron ore or pellets are below the melting point, with low carbon content and can be used for steelmaking. 2. Bread iron, a mechanical forging and casting term, usually refers to relatively large pieces of iron that have not been melted. It also refers to a piece of iron or iron plate that has been melted but not used.

Bread iron pot is harmless to the human body, pig iron generally refers to the alloy of iron with a carbon content of 2. Also known as cast iron. In addition to carbon, pig iron also contains silicon, manganese and a small amount of sulfur and phosphorus, etc., which can be cast but not malleable.

According to the different forms of carbon in pig iron, it can be divided into steelmaking pig iron, cast pig iron and ductile iron. Generally, the carbon content is small and wide, called wrought iron or pure iron, the content is called steel, and the content is more than 2% pig iron. Wrought iron is soft, good plasticity, easy to deform, low strength and hardness, and is not widely used; Pig iron contains a lot of carbon, is hard and brittle, and has almost no plastic**Thank you for your patience.

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The difference between gray iron and white cast iron is that the carbon in gray cast iron is in the form of black coarse flake graphite.

The carbon in white cast iron is all in the form of cementite, and in eutectic white iron, the cementite is a white matrix, while in the pereutectic white iron, the primary cementite is a thick white strip. Due to the presence of graphite, the strength and hardness of gray cast iron are very low, and the plastic toughness is also poor. In white cast iron, due to the presence of cementite, it has the characteristics of being hard and brittle.

Analyze the relationship between the two from the appearance, characteristics, use, and grade

1. White iron.

Appearance: White cast iron has a bright white cross-section and is present in iron in the shape of cementite (i.e., iron carbide).

Characteristics: White cast iron is hard and brittle, not easy to cut, and is rarely used directly in casting parts. The carbon content of white cast iron is generally about %, of which the content of silicon is less than 1%, and the carbon in white cast iron is all in the form of osmotic carbon body (Fe3C), because the fracture of white cast iron is bright white.

Therefore, it is called white cast iron.

2. Gray iron.

Appearance: Gray cast iron is the most common kind of cast iron, gray cast iron is also called ordinary cast iron, the section is dark gray color, and carbon exists in the iron in the form of flake graphite.

Properties: Grey cast iron is formed due to a slower cooling rate during the smelting process. However, it is mainly due to the chemical composition, the presence of a large number of silicon elements, which can promote graphitization, so the silicon content in gray cast iron is higher.

Grey cast iron belongs to the higher strength inoculated cast iron (also known as metamorphic cast iron), which is obtained by inoculation treatment of ordinary cast iron. The carbon content of gray cast iron is greater than , and most or all of the carbon in cast iron exists in free flake graphite.

3. Use. Gray cast iron is the most widely used and most widely used cast iron. It has excellent castability, machinability, wear resistance and shock absorption.

The compressive strength and hardness are close to carbon steel, but the tensile strength and plasticity are lower and the brittleness is larger. The production process of gray cast iron is simple, inexpensive, and widely used in mechanical engineering, mainly for wear-resistant components under medium loads.

4. Grade. The grade of gray cast iron is composed of "HT" plus two sets of numbers, HT stands for "gray iron", the first group of numbers refers to the minimum tensile strength, and the second group of numbers refers to the minimum flexural strength. <>

Bread iron" is actually a kind of steelmaking raw material, molten iron will have a lot of cavities in the process of cooling into a block, because it resembles bread and gets its name Iron is divided into steelmaking, cast iron and industrial pure iron, it contains five major elements in addition to iron, carbon, silicon, manganese, phosphorus and sulfur. Among them, the carbon content is about 4%, the silicon content below is steelmaking, and the above is cast iron, and its content is affected by the furnace temperature in the blast furnace. Manganese content is determined by the content of iron ore is normal, phosphorus and sulfur are harmful elements, phosphorus content is brought into the general requirement < by iron ore, and sulfur content is brought in by ironmaking coke for scrap iron.

Industrial pure iron is smelted by converters with a carbon content of <. Grey cast iron. The carbon content is high (, the carbon mainly exists in the form of flake graphite, and the fracture is gray, referred to as gray iron.

The melting point is low (1145 1250), the shrinkage is small when solidified, the compressive strength and hardness are close to carbon steel, and the shock absorption is good. Due to the presence of flake graphite, it has good wear resistance.

Summary. We are happy to answer for you: white iron good.

White iron] is a type of pig iron. The carbon content is about, and the silicon is less than 1. The carbon in white iron is present as Fe3C carbide. The cross-section is white, hard and brittle, and is not easy to be machined. It is mainly used for steelmaking.

Gray iron, a type of pig iron. The carbon content is about 3, and the silicon content is about 2. The carbon in the gray iron exists in the form of flake graphite.

The section is dark gray. The quality is soft, and it can be cut. It is easy to flow when hot, and has good casting performance.

More wear-resistant. Poor strength and ductility. Mainly used for casting.

Which is better, gray iron or white iron.

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We are happy to answer for you: white iron good.

White iron] is a type of pig iron. The carbon content is about, and the silicon is less than 1 ignition. The carbon liquid deficiency in white iron is present in iron carbide Fe3C. The silver section is white, hard and brittle, and is not easy to be machined. It is mainly used for steelmaking.

Gray iron, a type of pig iron. The carbon content is about 3, and the silicon content is about 2. The carbon in the gray mouth socks iron is stored in a flake graphite state.

The section is dark gray. The quality is soft, and it can be cut. It is easy to flow when hot, and has good casting performance.

More wear-resistant. Poor strength and ductility. Mainly used for casting.

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Gray iron refers to iron that contains more impurities, such as sulfur, tongs, phosphorus, etc., and the color is relatively dull. Although this iron is very hard, it is prone to rust and difficult to process and spread. Therefore, in order to obtain better material properties in industrial production, it is necessary to convert gray iron into white iron.

The white iron is specially treated to remove the impurities in the iron grill, and its color is bright, easy to process and extend. White iron is more widely used, such as in the manufacture of high-strength steel, car parts, mechanical parts, etc. The commonly used method is slag preparation, that is, adding Pingchen Minchangheng slag containing high alkalinity to molten iron, so that the slag reacts with impurities, adsorbs and removes, so as to improve the purity of iron.

There is also a high-temperature reduction method, which reduces impurities into volatile substances and detachs from molten iron by adding a reducing agent at high temperatures. The directional solidification method is to achieve the separation and convergence of impurities in iron at different grain boundaries by precisely controlling the cooling rate of molten iron and the formation of crystal nuclei, so as to obtain purer white iron.

Summary. Gray iron cannot be turned into white iron, and even if steel is added, the casting properties of the casting cannot be changed.

Gray iron cannot be turned into white iron, and even if steel is added, the casting properties of the casting cannot be changed.

Fellow, I really didn't understand, I can be more specific.

The answer is: gray iron and steel can be turned into white iron by a certain method. The high amount of carbide in grey iron makes it difficult for iron in iron ore to be reduced to alloying in the steelmaking process.

The amount of carbide in steel is lower than that of gray iron, and the carbon element of gray iron can be reduced by a certain method, so as to realize the process of turning gray iron into steel. To put it simply, when adding steel, the carbon content and other impurity elements are appropriately reduced, so that the gray iron becomes purer potato skin, so that the gray iron becomes white iron. However, it should be noted that the cost of this method is high, and it also requires certain technical and technological support.