Concepts of Metal Hardness Tests

-
Brinell Hardness Test


 Rockwell Hardness Test

  

 Vickers Hardness Test

  

Comments

Post a Comment

Popular posts from this blog

all about gears (kinds ,applications,.....)

-
Image
Gears Gears are Power transmission elements. It is the Gears that decides the torque, speed and direction of rotation of all the driven machine elements. Broadly speaking, Gear types may be grouped into five major categories. They are Spur, Helical, Bevel, Hypoid, and Worm. A lot of intricacies are there in the different types of gears. Actually The choice of gear type is not a very easy process. It is dependent on a number of considerations. Factors that go into it are physical space and shaft arrangement, gear ratio, load, accuracy and quality level. Types of Gears Types of Gears A number of gears are manufactured using different materials and with different performance specifications depending on the industrial application. These gears are available in a range of capacities, sizes and speed ratios, but the main function is to convert the input of a prime mover into an output with high
Read more

3- Internal Combustion Engines cooling and lubrication system (automobile engineering)

-
Image
  in the previous sections we had discuss : Classification of Internal Combustion Engines and Engine Components (Course) Internal Combustion Engines Components 2 (Course)   In This  section we will discuss : -Describe and explain the operation of a typical cooling system for an industrial ICE. -Describe and explain the operation of a typical lubrication system for an industrial ICE. SECTION 3 Objective 7 Describe and explain the operation of a typical cooling system for an industrial ICE. ENGINE COOLING Small internal combustion engines are often air-cooled. Each cylinder or motor block is equipped with many thin fins creating an extensive cooling surface. This has the advantages of being simple and cheap, but the disadvantage of lack of control of the engine temperature because the cooling efficiency depends on the weather conditions. For high compression diesel engines, the combustion temperature can exceed 2000°C, and only 30 - 35% of the heat is converte
Read more

Internal Combustion Engines Components 2 (automobile engineering)

-
Image
in the previous section we had discuss : Classification of Internal Combustion Engines and Engine Components (Course)     that  we had discussed in : -Classification of Internal Combustion Engines -Internal Combustion Engine Components     lets begin our section which we will discuss : -Describe individual pump, distributor, and common rail fuel injection systems for a diesel engine. -Explain the purpose and describe the operation of superchargers and turbochargers - Describe the cooling systems, function operation, inspection, and service.       SECTION 2 Objective 3 Describe individual pump, distributor, and common rail fuel injection systems for a diesel engine. THE FUEL INJECTOR The diesel engine, unlike some gasoline engines, does not use a carburetor to mix the fuel and air nor does it use a spark to ignite the fuel-air mixture. Instead, the diesel uses an injection system to spray the fuel into the engine cylinder. The fuel must enter against the pressure of the
Read more