Mainly refers to iron products, its advantages are: resistance to deformation, high strength, good wear resistance, high hardness, low price and long life. It belongs to carbon iron alloy, which is divided into high carbon steel, low carbon steel and medium carbon steel; it is divided into round pipe, square pipe, angle iron and steel plate. Round tubes are mainly used for chair products; square tubes are used for beams and brackets; steel plates are mainly used for baffles, screens, pendants, support arms, metal cabinets, doors, etc.
Steel products disadvantages:
1, easy to rust
2, heavy volume
3, afraid of moisture
The methods for solving the above defects include electroplating, spraying, and black-and-blue processing.
There are many processing methods for hardware parts: bending, punching, drilling, welding, cutting, and pressing. In short, processing according to design requirements or product requirements.
(二) Non-ferrous metal parts
Refers to all metal parts except iron products such as: aluminum, copper, zinc, stainless steel, etc. It has a feature that is not easy to rust, and its strength is worse than that of black metal. There are many furniture used: aluminum plate, aluminum rod, stainless steel tube, stainless steel plate, copper plate, zinc plate.
Stainless steel parts: stainless steel parts are divided into two categories: stainless steel and stainless steel: often called "430" for stainless steel, "304" for pure stainless steel, one of the methods for judging them: testing with magnets, "430" can be magnet Suck, but "304" can't. The proportion of stainless steel parts is slightly higher than that of iron products, but the price is four times higher than that of iron products. Therefore, only high-end products are used.
Copper products: Copper products are divided into pure copper and copper alloys. Pure copper, also known as copper, has poor strength and hardness but good toughness. Among the copper alloys, the furniture is mostly brass, which is a zinc-based alloy copper. The price of pure copper is slightly higher than "304" stainless copper 30~40%, while brass is 20% lower than pure copper. The hardness and strength of copper alloy are slightly higher than that of stainless copper, but it is easy to break and brittle. The copper parts used in the furniture are mainly handles and pre-embedded screws. In order to prevent "rusting", pure copper is generally used after plating, while brass is not required, and a large area is used for furniture.
Zinc products: Pure zinc products are used less, mainly in combination with zinc alloys or steel. Such as galvanized sheet, electrolytic board, etc. Less use in furniture due to the poor strength of zinc products. Zinc alloy parts such as eccentric buckles, structural parts connection points (pieces), etc. The specific gravity of zinc alloy is about 6.8 lower than that of iron. The price is between steel and aluminum alloy. Most zinc alloys produce furniture parts in the form of die-casting parts.
Titanium, zirconium alloys: These are relatively expensive metals. They are used in most of the furniture in electroplated form and are used in high-grade handles, hinges and high-end exposed connectors or hotel furniture. The cost of electroplating is about 40% higher than the cost of chrome plating, but the appearance is high-grade similar to gold and silver products, the wear resistance is very good, and it will not rust.
Many furniture hardware products use castings, such as handles, door hinges, etc. At present, there are many popular casting production methods in the market, such as: precision casting process, die casting process, casting process. Casting materials are brass, stainless steel, zinc-tin alloy, and aluminum alloy. Casting product features: exquisite, special shape and so on. The shortcomings are high cost per piece, different casting process costs are different, roughly high to low, precision casting, die casting, casting, mold cost is high to low: die casting, precision casting, casting. The shortcomings of the casting products are: the production cycle is slightly increased, the products have to be qualified for 2 to 3 processes, and the accessories must be processed according to different requirements or plating, polishing, drawing, sandblasting, fuel injection and other surface decoration.
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