Nowadays, shoes and bags are not only the items that are needed everyday, but also a kind of aesthetic combination, the carrier of decorative charm. A simple piece, coupled with stylish and unique hardware accessories, the items are instantly lit up, making people love it. Different clothes are paired with different shoes, and different shoes have to be matched with different bags. It can be said that women's love for shoes and bags is getting stronger and stronger, and they are not inferior to obsessed with beautiful clothes. Shoes and bags that are always at the forefront of fashion have become a problem at the same time as designers design. The style is both fashionable and rich, and the existence of shoe hardware accessories has brought good news to shoes and luggage design.

Today, let us know some of the properties of shoe buckle hardware, such as mechanical properties, casting properties, chemical properties. First of all, the technical performance of the shoe buckle hardware refers to those properties that the material is subjected to various processing and processing capabilities.

Casting performance: refers to the metal or alloy is suitable for casting some process performance, mainly including flow properties, full mold capacity; shrinkage, the ability of the volume to shrink when the casting solidifies; segregation refers to chemical composition unevenness.

Welding performance: refers to the welding of two or more metal materials together by metal or heat and pressure welding, and the interface can meet the purpose of use.

Mechanical properties: Mechanical properties refer to the properties exhibited by metallic materials under external forces.

1. Strength: The ability of a material to resist deformation and fracture under external force (load). The unit area of the material is stressed by the load.

2, yield point (бs): said yield strength, refers to the material in the process of pulling, when the stress of the material reaches a certain critical value, the load no longer increases the deformation but continues to increase or generate 0.2% L stress value, the unit Newton/mm 2 (N/mm2) is indicated.

3. Tensile strength (σb) is also called the strength limit. The material is subjected to the maximum stress value before breaking. The unit is expressed in Newtons/mm 2 (N/mm2).

4. Elongation (δ): The percentage of the total elongation to the length of the original gauge length after the tensile fracture of the material.

5. Section shrinkage (Ψ) The percentage of the material that shrinks after fracture, the maximum area of the section and the area of the original area.

6. Hardness: refers to the ability of the material to resist the surface of other harder materials. The commonly used hardness is determined by the range of hardness (HBS, HBW) and Rockwell hardness (HKA, HKB, HRC).

7. Impact toughness (Ak): The ability of the material to withstand impact loads in joules/cm 2 (J/cm 2 ).

Tensile stress and stage

1. Elasticity: εe=σe/E, index σe, E

2. Rigidity: △L=P·l/E·F Strong resistance to elastic deformation

3, strength: σs---yield strength, σb---tensile strength

4, toughness: impact absorption work Ak

5. Fatigue strength: alternating load σ-1<σs

6, hardness HR, HV, HB

a. Stage I: Line elastic stage, the initial stress stage, the stress-strain curve is a straight line, and the maximum stress limit at this stage is called the material's proportional limit σe.

b. Stage II: In the yielding stage, when the stress increases to a certain value, the stress-strain curve appears horizontally (with slight fluctuations). During this period, the stress is almost constant, but the deformation increases sharply, and the material loses its ability to resist deformation. This phenomenon is called yielding, and the corresponding stress is called yield stress or yield limit and is expressed by σs.

c. Stage III: In the intensive stage, after yielding, the material enhances its ability to resist deformation. The stress corresponding to the highest point of the strengthening phase is called the strength limit of the material. Expressed by σb, the strength limit is the maximum stress that the material can withstand.

d. Stage IV: In the necking stage, when the stress increases to the maximum value σb, a certain part of the test piece shrinks significantly and finally breaks at the neck.

The low carbon steel σs and σb are the main indicators to measure their strength. Rigidity: △L=P·l/E·F, the ability to resist elastic deformation. P---tension, l---material original length, E---elastic modulus, F---section area.

Top gas segment performance: refers to the ability of metal materials to withstand forging without breaking.

Cold bending performance: It means that the metal material can withstand bending without breaking performance at normal temperature. The degree of bending is generally expressed by the ratio of the bending angle α (outer corner) or the diameter d of the core to the material thickness a. The larger a or the smaller the d/a, the better the cold bendability of the material.

Stamping performance: The ability of metal materials to withstand stamping deformation without breaking. Pressing at normal temperature is called cold stamping. The test method was tested by cupping test.

Forging properties: The ability of metal materials to withstand plastic deformation without cracking during forging.

Chemical properties: Refers to the resistance of a metal material to chemical or electrochemical reactions when it is rubbed against the surrounding medium.

Corrosion resistance: refers to the ability of metal materials to resist various media erosion.

Oxidation resistance: refers to the ability of metal materials to resist the generation of scale at high temperatures.

Dongguan Zhenming Hardware Plastic Technology Co., Ltd. is a professional manufacturer of luggage leather shoes and clothing hardware accessories. It specializes in: buckle、eyelet、aglet、puller、nameplate. Since the design of the mold technology development department, mold production workshop, we can provide customers with product design, mold opening, finished product processing, packaging, distribution one-stop service according to the samples or drawings provided by customers. In the "customer first, quality is the life of the factory" business purposes, to provide customers with high-quality green products and quality services.