1. Strength and toughness The working conditions of Hou […]
1. Strength and toughness
The working conditions of Household Product Mould are mostly very harsh, and some often bear a large impact load, which leads to brittle fracture. In order to prevent the die parts from breaking suddenly when working, the die must have higher strength and toughness. The toughness of household product mould mainly depends on the carbon content, grain size and microstructure of the material.
2. Fatigue fracture performance
In the working process of household product 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 mould mainly depends on its strength, toughness, hardness and the content of inclusions in the material.
3. High-temperature performance
When the working temperature of the household product mould is higher, the hardness and strength will decrease, leading to early wear or plastic deformation of the mould and failure. Therefore, the mould material should have higher tempering resistance stability to ensure higher hardness and strength of the mold at the working temperature.
4. Cold and hot fatigue resistance
Some household product mould is repeatedly heated and cooled in the working process, causing the surface of the cavity to be pulled and pressure to change stress, causing surface cracking and peeling, increasing friction force, hindering plastic deformation and reducing dimensional accuracy, thus leading to mould failure.
5. Corrosion resistance
When some household product mould, such as plastic moulds, work, due to the presence of chlorine, fluorine and other elements in the plastic, strong corrosive gases such as HCI, HF and the like are decomposed and separated out after being heated, thus eroding the surface of the mould cavity, increasing the surface roughness and aggravating wear failure.