鹰潭Hardware mold frame is applied to the prerequisite requirements

Regarding the prerequisite requirements for the application of hardware mold frame, I believe that many friends are interested in the following Huarui Xun mold frame to explain to you.

First, wear resistance

When the billet is plastic denaturated in the cavity of the metal mold frame, it moves and slides along the surface of the cavity, causing violent friction between the surface of the cavity and the billet, resulting in the failure of the metal mold frame due to wear. Therefore, the wear resistance of the data is one of the most fundamental and important properties of the metal mold frame.

Hardness is the main factor affecting wear resistance. Under normal conditions, the higher the hardness of the metal mold parts, the smaller the wear amount and the better the wear resistance. In addition, the wear resistance is also related to the variety, quantity, shape, size and distribution of carbides in the data.

Second, strength and toughness

Most of the working conditions of the metal mold frame are very bad, and some often accept a large impact load, resulting in brittle fracture. In order to avoid the sudden brittle break of the metal mold parts during work, the metal mold should have high strength and toughness.

The toughness of the metal mold frame mainly depends on the carbon content, grain size and microstructure of the data.

Third, fatigue fracture performance

In the working process of metal mold frame, under the long-term action of cyclic stress, it often causes fatigue and fracture. Its modes include repeated impact fatigue fracture, tensile fatigue fracture, contact fatigue fracture and bending fatigue fracture with small energy.

The fatigue fracture performance of the metal mold frame mainly depends on its strength, toughness, hardness, and the content of inclusions in the data.

Fourth, high temperature performance

When the working temperature of the metal mold is high, the hardness and strength will fall, resulting in early wear or plastic deformation of the metal mold and failure.

Because the metal mold frame should have a high tempering stability to ensure that the metal mold frame has a high hardness and strength at the working temperature.

Fifth, resistance to cold and heat fatigue performance

Some hardware mold frame in the working process in the state of repeated heating and cooling, so that the cavity surface tension, pressure variable stress, causing the appearance of cracking and spalling, increasing friction, obstacles to plastic deformation, reduce the dimensional accuracy, resulting in hardware mold frame failure.

Hot and cold fatigue is one of the main ways of failure of hot metal mold frame. This kind of metal mold frame should have high resistance to cold and heat fatigue.

6. Corrosion resistance

Some hardware mold frames such as plastic molds at work, due to the presence of chlorine, fluorine and other elements in the plastic, after heat synthesis precipitation of highly corrosive gases, corrosion of the metal mold frame cavity appearance, increase its surface roughness, aggravate wear failure.