Fergana polytechnic institute faculty of mechanics and mechanical engineering e18-21 tmj group studentpresentation project prepared by tolashev otabek from materials. Science checked by: Akhrorov A

FERGANA POLITECHNIC INSTITUTE FACULTY OF MEHANICAL ENGINEERING DEPARTMENT OF TECHNOLOGICAL MACHINES AND EQUIPMANT GROUP E18-21 STUDENT tulashev o MATERIALS SCIENCE AND TECHNOLOGY OF CONSTRUCTION MATERIALS INDEPENDENT WORK

FERGANA 2022

• Executed by: To’lashev O.
• Accepted by: Axrorov A.

Topic: Carbon steels and their use in machine building.

• PLAN1

1. Carbon steels as construction.

2. Types of carbon steels according to their characteristics.

3. Steel is the main material used in machine building.

4. References.

1. Carbon steels as construction.

1. Carbon steels as construction.

• Carbon steels of ordinary quality are widespread and are widely used in the manufacture of machine and mechanism details.
• Structural quality steels are made in converter, marten and electric furnaces. Normal quality carbon steels are divided into groups A, B, V according to their preparation.
• Structural quality carbon steels. Kop uses structural steels in the manufacture of machines and mechanisms. The difference between structural steels and normal quality steels is that they contain less harmful sulfur, phosphorus and other additives. There is a large amount of silicon and manganese (Mp), which improves the quality of all scores. Structural quality steels can be divided into:
• Low carbon steels brand - up to 0.5-10

2. Relatively low carbon 15-25 grade steels.

• Medium carbon high strength steels. Brand 30-50.
• Structural high-carbon high-quality steels. Details working under the influence of high static, dynamic and vibration loads are made from this steel.

.Steels are the main material used in machinery, automotive, tooling, construction, and other industries. Steel refers to an Fe-C alloy with a carbon content of 0.2-2%. Steel has a complex of important mechanical, physico-chemical and technological properties. Steels are divided into carbon and alloy types according to their chemical composition. Carbon steel refers to an iron-carbon alloy containing up to 2.14% carbon and Si, Mn, S and P. The main property of carbon steel depends on the carbon content. Carbon steels are divided into low-carbon (up to 0.25% C), medium-carbon (0.25-0.6% C) and high-carbon (more than 0.6% C) types depending on the carbon content. is divided. In addition to the usual impurities, alloy steel contains alloying elements that determine its properties. Depending on the amount of added alloying elements, alloyed steels are divided into three groups: low alloyed (the total amount of alloying elements is up to 2.5%) medium alloyed (alloying elements are from 2.5 to 10% lgan) and high-alloyed (with more than 10% alloying elements) steels. Alloy steel has properties that carbon steel does not have, and alloy steel does not have the disadvantages of carbon steel.`

• .Steels are the main material used in machinery, automotive, tooling, construction, and other industries. Steel refers to an Fe-C alloy with a carbon content of 0.2-2%. Steel has a complex of important mechanical, physico-chemical and technological properties. Steels are divided into carbon and alloy types according to their chemical composition. Carbon steel refers to an iron-carbon alloy containing up to 2.14% carbon and Si, Mn, S and P. The main property of carbon steel depends on the carbon content. Carbon steels are divided into low-carbon (up to 0.25% C), medium-carbon (0.25-0.6% C) and high-carbon (more than 0.6% C) types depending on the carbon content. is divided. In addition to the usual impurities, alloy steel contains alloying elements that determine its properties. Depending on the amount of added alloying elements, alloyed steels are divided into three groups: low alloyed (the total amount of alloying elements is up to 2.5%) medium alloyed (alloying elements are from 2.5 to 10% lgan) and high-alloyed (with more than 10% alloying elements) steels. Alloy steel has properties that carbon steel does not have, and alloy steel does not have the disadvantages of carbon steel.`