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What are the performance requirements of metal signs for materials?
Release time:
2022-01-12 15:25
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As we all know, metal signs are used more and more in various fields of modern society, mainly widely used in electronic products, home appliances, machinery and civil products and other fields. So popular, mainly metal signs on the performance requirements of the material, the need for strength, hardness, plasticity, fatigue strength, impact toughness, etc. strictly reflected above.
1. strength: The ability of metal sign materials to resist plastic deformation or fracture under load.
1. Symbol: Yield strength σs-the minimum stress when the material yields. The unit is Mpa.
2. Tensile strength σb-the maximum stress that the material bears before breaking. The unit is Mpa.
Application conditions and scope: the main basis for designing mechanical parts and selecting materials.
2. Hardness: The ability of the surface of a metal label material to resist deformation when another object is pressed in within a local volume.
1. Symbol: Brinell hardness HB; Rockwell hardness HR.
2. Application conditions and scope: Brinell hardness is mainly used to measure gray cast iron, non-ferrous metal signs, and steel materials such as annealed, normalized and quenched and tempered. HBS is suitable for measuring materials with hardness values less than 450 and HBW is suitable for measuring materials with hardness values less than 650. Rockwell hardness tester can measure soft metal materials, can also be measured hard metal materials. HRA is mainly used to measure cemented carbide and surface hardened steel; HRB is mainly used to measure mild steel, annealed steel, copper alloy, etc.; HRC is mainly used to measure general hardened steel.
3. plasticity: the ability of metal sign material to produce plastic deformation under load without fracture.
1. The symbol indicates: elongation after fracture δ-the relative elongation of the gauge length after the specimen is broken.
2. Area shrinkage ψ-the relative shrinkage of the cross-sectional area of the sample after the sample is broken.
3. Application conditions and scope: the main basis for material selection during pressure processing.
4. fatigue strength: the maximum stress of metal sign material under repeated alternating load without fracture.
1. Symbol: fatigue strength δ-1
2. Application conditions and scope: ferrous metal cycle 10 to the 7th power, non-ferrous metal signs and some high-strength steel cycle 10 to the 8th power.
5. impact toughness: The ability of metal sign material to resist impact load without damage.
1. The symbol indicates: impact absorption work Ak; Impact toughness ak.
2. Application conditions and scope: The impact toughness value is generally only used as a reference for material selection and cannot be used as a basis for calculation. The multiple impact resistance of the material mainly depends on the plasticity; when the impact energy is, it mainly depends on the strength.
In summary, the production of metal signs is mainly based on raw materials such as copper, iron, aluminum, zinc alloy, titanium, stainless steel, etc., through stamping, die-casting, etching, printing, enamel, imitation enamel, baking varnish, dripping plastic, electroplating and other processes. The performance requirements of the metal label on the material are the specific contents described above.
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