[China Aluminum Industry Network] In order to make more rational use of metal data and give full play to its effects, it is necessary to grasp the functions (application functions) of zero and components made of various metal materials under normal operating conditions and their use in cold and hot processing. The function (process function) that the data in the process should have. The functions of the data include physical functions (such as specific gravity, melting point, conductivity, thermal conductivity, thermal expansion, magnetic properties, etc.), chemical functions (corrosiveness and oxidation resistance), and mechanical functions also called mechanical functions. The technological function of the data refers to the ability of the data to adapt to cold and hot processing methods.
Mechanical function The mechanical function refers to the characteristic of the metal material under the effect of external force. 1, strength: data in the external force (load) effect, resistance to deformation and cracking ability. The unit area of ​​the data is called load stress. 2. Accrual point (бs): It refers to the strength of flexion. It means that when the stress of the data reaches a certain critical value during the pulling process, the load will not add deformation but continue to add or produce 0.2% L. Time stress value in Newtons/mm 2 (N/mm2). 3. Tensile strength (бb), also called strength limit, means that the material receives a greater stress value before breaking. The unit is indicated in Newtons/mm 2 (N/mm2). 4. Elongation (δ): The percentage of the total elongation and the initial gauge length after tensile cracking of the data. 5. After the area of ​​shortening rate (Ψ) data is stretched and cracked, the area of ​​the section is larger and the percentage of the original area is reduced. 6. Hardness: refers to the ability of data to resist the pressure of other harder objects. The hardness is measured according to the scale of the Brinell hardness (HBS, HBW) and Rockwell hardness (HKA, HKB, HRC) 7. Impact toughness (Ak): The ability of the data to resist impact loads in Joules/cm 2 (J/cm 2 ).
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