Table Mould Should Have Higher Strength And Toughness
1. Wear resistance
When the blank plastically deforms in the cavity of the Table Mould(FURNITUREMOULD), it flows and slides along the cavity surface, causing severe friction between the cavity surface and the blank, thus causing the table mould to fail due to wear. Therefore, the wear resistance of materials is one of the basic and important properties of table mould.
Hardness is the main factor affecting wear resistance. In general, the higher the hardness of the table mould parts, the smaller the wear amount, and the better the wear resistance. In addition, wear resistance is also related to the type, quantity, morphology, size and distribution of carbides in the material.
2. Strength and toughness
Most of the working conditions of table mould are very harsh, and some of them often bear a large impact load, which leads to brittle fracture. In order to prevent the table mould parts from breaking suddenly when working, the table mould should have higher strength and toughness. The toughness of the table mould mainly depends on the carbon content, grain size and microstructure of the material.
3. Fatigue fracture performance
During the working process of the table mould, fatigue fracture often occurs under the long-term action of cyclic stress. It takes the form of small energy multiple impact fatigue fracture, tensile fatigue fracture, contact fatigue fracture and bending fatigue fracture. The fatigue fracture performance of the table mouldmainly depends on its strength, toughness, hardness and the content of inclusions in the material.
4. High-temperature performance
When the working temperature of the table mould is higher, the hardness and strength will decrease, resulting in early wear or plastic deformation of the table mould and failure. Because the table mould material should have higher tempering resistance stability to ensure that the table mould has higher hardness and strength at the working temperature.
5. Cold and hot fatigue resistance
Some table mould are repeatedly heated and cooled during the working process, which makes the surface of the cavity subject to tension and pressure change stress, causing surface cracking and peeling, increasing friction, hindering plastic deformation and reducing dimensional accuracy, thus leading to table mould failure. Cold and hot fatigue is one of the main forms of failure of hot-working table mould, which should have a high cold and hot fatigue resistance.
6. Corrosion resistance
When some table mould work, due to chlorine, fluorine and other elements in the plastic, they decompose and separate out strong corrosive gases after being heated, corrode the surface of the cavity of the table mould, increase its surface roughness and aggravate wear failure.
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