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Forging process

Forging process generally includes heating, forging forming, cooling, inspection and heat treatment. Determination of heating forging temperature

The forging temperature of the superalloy, that is, forging heating temperature, must be lower than the incipient melting temperature and the sharp growth of the austenite grain so as to prevent the grain from being excessively coarse, the grain boundary becomes thick and straight, the intragranular strengthening phase is combined and the grain is coarse and the crystal Boundary analysis of the strip or mesh equal, otherwise it will directly affect the forging final forging after the organization and performance.

On the other hand, the forging temperature must be high enough to dissolve the reinforcing phase to prevent the precipitation of the strengthening phase causing brittleness and increasing the deformation resistance. Generally, the initial forging temperature of the superalloy is taken to be 30 to 40 ° C higher than the solution treatment temperature.

(A) final forging temperature determination

As with other forging process parameters, the final forging temperature has a significant effect on the microstructure, grain size and mechanical properties of superalloys. The final forging temperature of superalloys is mainly limited by the recrystallization temperature. As mentioned above, when the final forging temperature is lower than the recrystallization starting temperature, in addition to reducing the plasticity of the alloy and increasing the deformation resistance, uneven deformation and non-uniform grain structure are obtained. The recrystallization start temperature of the alloy is related to the amount of deformation, and the recrystallization start temperatures of several commonly used superalloys are shown in Table 9. The final forging temperature of Fe-based superalloy generally varies from 900 to 1000 ℃. The recrystallization temperature of Ni-based superalloy is higher, and the final forging temperature usually varies from 950 ℃ to 1050 ℃.

Forging shape

After the metal is heated, it can be forged and shaped. According to the equipment used for forging, the molds and forming methods, the forging can be divided into free forging, die forming and tire forging.

Forging release agent selection criteria

With the increasing demand for the precision of forging demolding workpieces, graphite milk has been unable to meet the requirements of forging manufacturers and started to use new demolding products. As a result, forging demolding agents are produced and widely used in forging and casting industries. The following forging release agent selection criteria to do a detailed introduction.

That forging release agent selection criteria is what? How to choose forging industry? In the face of the many forged release products on the market, the forging industry will be overwhelmed by the choices made, with a wide range of product offerings. Forging release agent The separation of the workpiece and the mold without residue and accumulation of residual, does not affect the surface quality of the workpiece, the use of safety and environmental protection, spreading, good wettability, can effectively cover the entire mold, has been sold throughout the country.

Select forging mold release agent should first pay attention to the environment should be selected without affecting the use of mold release products. With the enhancement of humanization and environmental awareness, to avoid the impact on the environment, so you need to choose forging release agent instead of graphite milk mold and workpiece separation.

Second, we need to consider whether the release effect is significant. Can minimize the friction and wear forgings and molds; improve the quality of forgings, enhance the surface finish; the maximum mold has excellent insulation cooling effect; This is also the use of manufacturers are most concerned about the issue, determine the quality of the forgings to meet the factory requirements .

In addition, the use of manufacturers need to consider forging the price of mold release agent, the price is reasonable, stripping effect is significantly concerned with the use of manufacturers, can save more economic costs for enterprises, especially large forging enterprises. Therefore, the choice of forging release agent price is also one of the factors considered.

Forging a lot of mold release products, may refer to the above three aspects to choose forging mold release agent to use, so that the quality of forged parts better.