The required carbon content is 3 6 The carbon content in ductile iron is 4 41 The carbon content in

Steel with less than 2% carbon (mass fraction) and more than 2% iron is iron. Pig iron has a higher carbon content than wrought iron, and the higher the carbon content, the greater the hardness and the worse the toughness. Pure iron is an idealized substance that does not contain any impurities.

The number of words is not enough, the system is not human, and it is difficult to judge accurately. Only by increasing the number of words, when it reaches a certain number of words, it will be judged to be of high quality. The number of words is not enough, the system is not human, and it is difficult to judge accurately.

Only by increasing the number of words, when it reaches a certain number of words, it will be judged to be of high quality. The number of words is not enough, the system is not human, and it is difficult to judge accurately. Only by increasing the number of words, when it reaches a certain number of words, it will be judged to be of high quality.

The number of words is not enough, the system is not human, and it is difficult to judge accurately. Only by increasing the number of words, when it reaches a certain number of words, it will be judged to be of high quality. The number of words is not enough, the system is not human, and it is difficult to judge accurately.

Only by increasing the number of words, when it reaches a certain number of words, it will be judged to be of high quality. The number of words is not enough, the system is not human, and it is difficult to judge accurately. Only by increasing the number of words, when it reaches a certain number of words, it will be judged to be of high quality.

The number of words is not enough, the system is not human, and it is difficult to judge accurately. Only by increasing the number of words, when it reaches a certain number of words, it will be judged to be of high quality. The number of words is not enough, the system is not human, and it is difficult to judge accurately.

Only by increasing the number of words, when it reaches a certain number of words, it will be judged to be of high quality. The number of words is not enough, the system is not human, and it is difficult to judge accurately. Only by increasing the number of words, when it reaches a certain number of words, it will be judged to be of high quality.

First of all, the pure iron is calculated.

Mass: If you want his carbon content to become, the total mass of molten iron is.

Turning into a gram is.

If you reduce it, then you need a carburizer.

Formula: The mass of the recarburizer = [the mass of the raw molten iron (1-the original carbon content) (1-the required carbon content) - the quality of the raw molten iron] the absorption rate of the recarburizer.

The key is to grasp the invariant, and the invariant of this problem is the quality of pure iron.

At present, we only know the absorption rate of the carburizer, and we do not know how much the fixed carbon content of the carburizer is currently used, and it is not possible to accurately calculate the amount added. Because the carbon content of the carburizer on the market is not the same, from 80 to 99%, it depends on the carbon content of the carburizer you use to calculate the current addition amount.

Kiss! Hello, happy to answer your <>

The indexes of iron-carbon alloys with carbon content are as follows: Iron-carbon alloys are binary alloys with iron and carbon as components. Carbon steel and cast iron, the most widely used category of iron-based materials, are industrial iron-carbon alloy materials.

Iron-carbon alloy is a binary alloy composed of iron and carbon. The most widely used type of iron-based materials, carbon steel and cast iron, is an industrial iron-carbon alloy material. The reason for the wide range of application of steel materials is, firstly, that the available components span widely, from nearly carbon-free industrial pure iron to cast iron containing about carbon4, and the phase structure and microstructure of the alloy have undergone great changes in this range; In addition, various thermal processing techniques, especially metal heat treatment technology, can be used to greatly change the structure and properties of a certain component alloy.

Iron-carbon alloy is a general term for steel and iron, and is the most widely used alloy in industry. Iron-carbon alloy is an alloy composed of iron as the basic element and carbon as the main element. In the liquid state, iron and carbon are infinitely miscible with each other.

In the solid state, carbon dissolves in iron to form a solid solution. Metallic compounds appear when the carbon content exceeds the solid solubility of carbon in iron. In addition, mechanical mixtures consisting of solid solutions and metal compounds can be formed.

Hope mine can help you <>

Do you have any other questions?

3. Pig Iron, "Steel", Wrought Iron.

The main difference between pig iron, wrought iron and steel is the carbon content, iron with a carbon content of more than 2% is called pig iron; Iron with a carbon content lower than that is called wrought iron; Iron with a carbon content between is called steel.

In fact, pig iron is an iron-carbon alloy with a greater carbon content than . The carbon content of industrial pig iron is generally between, and contains elements such as SI, MU, S, P, etc., and is a product smelted by blast furnace with iron ore. There are two main types of pig iron.

1) Steelmaking pig iron has a low silicon content, generally not greater than . It is the main raw material for open-hearth and converter steelmaking, accounting for 80% and 90% of pig iron output. Steelmaking pig iron is hard and brittle, iron and carbon are in a chemical state, in the form of cementite (Fe3C), and its fracture is silvery-white, so it is also called white iron.

Rolls, pear ploughshares, iron, etc. are all white iron.

2) Cast pig iron has a large silicon content, generally . Due to its low melting point and good fluidity, it is often used to cast various castings, so it is also called cast iron. The carbon in cast pig iron exists in the form of graphite, and its fracture is gray, soft, and easy to cut, so it is also called gray cast iron.

For example, the bed, box, pipe, pipe fittings and various connectors are made of cast pig iron.

Wrought iron, also known as pure iron, is an iron-carbon alloy with a carbon content lower than that of , with an iron content and a total impurity content. Pure iron is mainly used as an electrical material, and it has high permeability and can be used in various iron cores. Pure iron is also used as a raw material for high-grade alloy steels.

Pure iron is rarely used as a structural material due to its soft texture and low strength; On the other hand, pure iron requires a very low content of impurity elements such as carbon, phosphorus, and sulfur, and its smelting is difficult, and the manufacturing cost is much greater than that of pig iron and steel.

Calculated by the law of leverage, because the carbon content is in the range of 0, it can be seen from the iron-carbon phase diagram that the room temperature ruler structure is ferrite.

Three cementite factions are trapped.

The composition of the phase is ferrite + cementite.

Since the carbon content in ferrite at room temperature is, it can be calculated by default to zero, of course, you can also bring in the dust to calculate. The mass F of the ferrite is used below to denote the mass F, and the mass of the cementite is expressed by WFE3C. Apparently WF+WFE3C=1

The calculation process is as follows:

According to the law of leverage, it can be seen that wf(

i.e. wf(, solution: wf=

wfe3c=1-wf=。

It can be seen that the carbon content is an iron-carbon alloy.

Its ferrite phase is occupied, and only the cementite contained is actually industrial pure iron.

Let the mass of carbon in the sample be x

Ignited by C+O2

CO2, CO2 + Ca(OH)2 = CaCO3 + H2O to C CaCO3

x 1gx1gx = the carbon content of the alloy is.

25g×100%=

Therefore, C

If 400 tons of pig iron with a carbon content are added to 2 tons of pure iron, the mass fraction of carbon is 400 ==