What are the performance requirements of metal signs?

As we all know, metal signs are used more and more in various fields of modern society, mainly widely used in the fields of electronic products, home appliances, machinery and civil products. So popular, mainly metal signs on the performance of the material requirements, need to be strictly reflected in strength, hardness, plasticity, fatigue strength, impact toughness and so on.

Strength: The ability of metal signage materials to resist plastic deformation or fracture under load.

1, the symbol indicates: yield strength σs - the minimum stress when the material produces yield. The unit is Mpa.

2, tensile strength σb - the maximum stress of the material before breaking. The unit is Mpa.

3, application conditions and scope: the main basis for the design of mechanical parts and material selection.

Second, hardness: the ability to resist deformation when another object is pressed into the surface of the metal sign material in the 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 after annealing, normalizing and tempering steel and other materials. HBS is suitable for measuring materials with a hardness value of less than 450 and HBW is suitable for measuring materials with a hardness value of less than 650. Rockwell hardness tester can determine soft metal materials, can also determine hard metal materials. HRA is mainly used for measuring 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.

Third, plasticity: the ability of metal sign materials to produce plastic deformation without breaking under the action of load.

1, the symbol indicates: elongation after breaking δ -- the relative elongation of the standard distance length after the sample is broken.

2. Section shrinkage ψ -- the relative shrinkage of the cross-sectional area of the sample after the specimen is pulled off.

3, application conditions and scope: the main basis for material selection when pressure processing.

Fourth, fatigue strength: the maximum stress of metal plate materials under repeated alternating loads without breaking.

1, the symbol indicates: fatigue strength δ-1

2, application conditions and scope: black metal cycle 10 to the 7th power, non-ferrous metal signs and some high-strength steel cycle 10 to the 8th power.

Impact toughness: The ability of metal signage materials to resist the impact load without destroying it.

1, symbol: impact absorption work Ak; Impact toughness ak.

2, application conditions and scope: impact toughness value is generally only used as a reference when selecting materials, can not be used as a basis for calculation. The multiple impact resistance of the material mainly depends on plasticity; When impacting energy, it mainly depends on the strength.

In summary, the production of metal signs is mainly based on copper, iron, aluminum, zinc alloy, titanium, stainless steel and other raw materials, through stamping, die casting, etching, printing, enamel, imitation enamel, paint, drip plastic, electroplating and other processes. The performance requirements of its metal signage for materials are the specific contents described above.