Aluminum casting is a type of product that is widely used in many industries. Cooling water plays an important role in the consumption and forming of die castings, and the quality of the die casting's appearance and service life are both affected by this factor. For die casting parts, the cooling water should be turned off first, and then the entire cooling process should be started after preheating the die casting to the appropriate temperature, and then the cooling strength should be reduced to adjust, so that the aluminum alloy die casting parts can achieve the appropriate heat balance. It is possible to construct a single local deep cavity mold using a point cold structure, and aluminum liquid will remain attached to the die casting for an extended period of time, causing the die casting mold to become sticky and tensile as a result. In order to ensure that cooling water is both in and out of the water, the cooling water at the point of demand must be stopped, as well as forced cooling, which must also be stopped. It is common for structures in low-forming positions to utilize the entire cooling structure, and superheated water is typically cooled from the center of the structure. The cooling water has an effect on the pressure casting's maintenance function as well as its cooling. Scale can easily clog the cooling water channel, which is located near the radiator. Changing the sealing ring allows for easier scaling removal and better distribution of cooling water, which helps to achieve the goal of cooling while also maintaining mold operating temperatures within the appropriate range.
1The following are the causes of air leakage in aluminum castings:
1. It is not permissible to spray aluminum on the die surface.
To avoid overheating and uneven shrinkage, which can result in cracks and air leakage, the mold should ensure that cooling water flows smoothly and that the heat balance is maintained.
3. Make certain that the alloy liquid is extremely clean, remove any gas and slag, and adjust the alloy liquid's temperature to a suitable level. If the component does not have a thin wall, use 620 ° six hundred and thirty °. It's a good thing.
4. During production, ensure that the mold parting surface is clean and free of air, and that no water is left in the chamber after spraying; instead, blow it out immediately.
5. Depending on the wall thickness of the product, the ratio should be between 1525mm and 2535mm to ensure that the cake is the proper thickness.
6. High productivity and ease of mechanization are two advantages.
2The following are the primary steps in the production of cast aluminum parts:
First, there is the annealing treatment, which is the process of heating aluminum alloy castings to 300 °C and then cooling them to room temperature with the furnace after holding them for a period of time. During annealing, the solution will decompose and the phase particles will congregate, which will relieve the internal stress of the casting, maintain the casting's size stability, prevent deformation, and increase the plasticity of the casting.
2. Solution treatment: heat the casting to the melting point of the eutectic, hold it at that temperature for a long period of time, and then cool it quickly so that the strengthening component can dissolve well and maintain the high temperature state until it reaches room temperature. 3. Solution treatment:Solid solution treatment is the term used to describe this procedure. Strong and plastic alloy die casting company can be made stronger and more flexible by using solid solution treatment, which also improves the corrosion resistance of the alloy. The temperature, holding time, and cooling speed of the solution treatment are all factors that influence the outcome of the treatment in most cases.
3. Aging treatment: Aging treatment refers to the process of heating solid solution-treated castings to a predetermined temperature and then discharging them after a specified period of time. The term natural aging refers to the process of aging strengthening that is completed at room temperature. Artificial aging is defined as the process of completing aging strengthening in an environment that is warmer than room temperature and holding it for an extended period of time. During the aging process, the spontaneous decomposition of supersaturated solid solution occurs, which has the effect of restoring the lattice structure of the alloy matrix to a relatively stable condition.
The following are the metal hard points of cast aluminum parts:
1. Incorporated with raw materials containing insoluble silicon
Use of silicon element powder in smelting silicon alloy is prohibited under the following conditions: (1)
(2) It is necessary to use intermediate alloys rather than directly adding silicon when adjusting the alloy composition.
(3) In order for silicon to completely melt, the melting temperature must be high and the melting time must be long.
In the second step, the raw materials that aid in the crystallization of primary silicon are combined.
(1) In order to maintain the melting state, the temperature fluctuation range of the casting is reduced.
(2) When adding cold material to an alloy ingot, it is important to keep it from solidifying.
(3) Reduce the number of components that contribute to die casting the formation of primary silicon.
3. When combined with crystalline materials that result in the formation of intermetallic compounds
(1) Reduce the temperature fluctuation range, and avoid raising or lowering the alloy's temperature to an excessively high or low level.
(2) When controlling the impurity content of alloy components, it is important not to increase the amount of impurities present in the alloy.
(3) High-temperature melting is required for materials that have the potential to form intermetallic compounds. A small amount of materials will be added to the mixture in order to prevent the accumulation of impurities.
