Metal material mechanical performance is introduced

The performance of metal materials general divided into two categories, process performance and application performance. Process performance refers to the mechanical parts in the process of processing and manufacturing, metal materials under the cold and hot working conditions of performance. Metal material process performance is good or bad, its resolution in the manufacturing process of shaping with talents. Due to the different processing conditions, request of process performance are different, such as the casting performance and weldability, malleability, heat treatment of performance, cutting processability, etc. Using performance refers to the mechanical parts under the condition of use, metal materials of performance, it includes the mechanical properties, physical properties, chemical properties, etc. Metal materials using the stand or fall of performance, its use range resolution and use life. In machinery manufacturing, general machinery parts are in normal temperature, atmospheric pressure and the intense corrosive medium used, and in the process of using all the mechanical parts will be accepted the role of different load. Metal materials under the action of load performance against damage, known as the mechanical properties ( Or mechanical properties) 。 Mechanical properties of metallic materials is part of design and material selection of main basis. Loads different nature, Such as tensile, austerity, change, impact and cyclic load, etc. ) , on the mechanical properties of the metal material request will also be different. The commonly used mechanical properties include: strength, plasticity, toughness and hardness, repeated impact resistance and fatigue limit, etc. The following will discuss various mechanical properties respectively. Strength strength refers to metal material under static loading to resist damage ( Too much plastic deformation or fracture) Performance. As a result of the action of load way has the way such as tensile, austerity, bending, shear, so the strength also divided into tensile strength, compressive strength, bending strength, shear strength and so on. Often have a certain contact between various strength, using ordinary more to tensile strength as the most fundamental strength index. Plastic plastic refers to metal materials under the action of load, produce plastic deformation, For deformation) Without damage. Hardness hardness is weigh the hard and soft metal data level indicator. In the current consumption method of determination of hardness is pressed into the hardness of the most commonly used method, it is to use a certain geometric shape head to a certain load tested down into the metal material appearance, basis by the level to determine the hardness value. Commonly used way of brinell hardness ( HB） , rockwell hardness ( HRA、HRB HRC) And vickers hardness ( HV） Methods etc. Discussed in front of the tired strength, plasticity and hardness are indicators on the mechanical properties of the metal under the action of static load. In practice, many machine parts are working under cyclic load, under the condition of the parts will produce tired. Impact toughness at great speed of load acting on the object known as impact load, metal under the action of impact load can withstand ruined called impact toughness.