Mechanical processing, understand machining material properties have?
1: which included the physical properties of the metal?
A: including density, melting point, thermal expansion, conductivity and thermal conductivity.
2: what is melting point?
A: is the temperature at which the metal by the solid into a liquid.
3: what is chemical properties of the metal?
A: refers to metal materials at room temperature or high temperature resistance to its surrounding chemical medium for its ability to erosion.
4: chemical properties including what?
A: including oxidation resistance and corrosion resistance.
5: what is the oxidation resistance?
A: under room temperature or high temperature anti-oxidation ability.
6: what is corrosion resistance?
A: materials such as water vapor corrosion resistance at high temperature.
7: what is the mechanical performance?
A: the ability to metal material to resist external force.
8: mechanical properties include what?
A: including strength, hardness, plasticity, toughness, fatigue strength, etc.
9: what is the deformation?
A: refers to the metal materials under the action of external force changes in shape and size.
10: what kinds of deformation of metal materials can be divided into?
A: can be divided into the tensile, compression, bending, distortion and shear.
11: what is the elastic limit?
A: refers to the material in the elastic stage are the most energetically.
12: what is the yield strength?
A: the point at which the phenomenon in the event of a material can can withstand maximum stress.
13: what call tensile strength?
A: refers to the material before snap can withstand the maximum stress.
14: what is plastic?
A: refers to the nature of the materials prone to deformation without fracture.
15: what is the hardness of materials?
A: refers to the material's ability to fight other objects into the surface.
16: what kind of expression method of hardness are there?
A: there are brinell, rockwell, vickers hardness.
17: what call process performance of metal material?
A: refers to the performance of the metal material is easy to processing molding.
18: process performance including of metal?
A: including casting, welding, forging, cutting and heat treatment.
19: what is alloy steel?
A: on the basis of the carbon steel to improve steel to want to join some certain mechanical properties of alloy element in steel.
Which a few kinds 20: alloy steel can be divided into?
A: can be divided into the alloy structural steel, alloy tool steel and special use steel.
21: what is a cast iron?
Answer: the carbon content is greater than 2.
11% of the iron carbon alloy cast iron.
22: cast iron can be divided into which a few kinds?
A: white cast iron, grey cast iron, nodular cast iron, alloy cast iron, malleable iron 23: what are the simple identification method of steel?
A: spark identification method, the fracture identification method, color logo identification method.
24: alloy structures have?
Answer: the solid solution, metal compounds, mechanical mixture.
Which a few kinds 25: aluminum alloy points?
A: can be divided into deformation aluminium and aluminium alloy foundry.
26: which a few kinds of copper alloy points?
A: can be divided into bronze, copper, brass.