6 problems that should be paid attention to in the precision casting process of alloy steel foundry

Affected by national policies, many precision foundries are now shifting their industrial structure towards energy conservation and environmental protection. So what are the precautions for energy-saving production in precision casting of alloy steel foundries? The following summarizes a total of six points:
1. Use optimized design and optimized technology to improve the production rate of precision castings. Under the premise of ensuring the quality of precision castings, changing the gating system and using heat-generating risers can usually increase the export rate. If the export rate can be increased from 60% to 70%, the energy consumption can be reduced by 14.3%.
2. Adopt high compactness molding machine and modern core-making technology to reduce casting quality and machining allowance as much as possible. Practice has proved that high-pressure molding can reduce the quality of castings by 3%-5% compared with manual molding and ordinary machine molding, and the machining allowance can also be maintained at 2-3mm. The weight reduction not only saves energy in the precision casting workshop, but also reduces the energy consumption of subsequent processing.
3.Alloy steel foundryPrecision casting adopts energy-saving technological process and rationally organize production. For example: use self-hardening resin sand or surface dry type instead of clay sand drying type to save the energy consumption of drying the mold; strict ingredients, determine the appropriate composition of precision castings, take effective incubation plans, and eliminate castings in the as-cast state. To eliminate the graphitization annealing process; promote the as-cast ductile iron, and require that the elongation after fracture is below 12% should be obtained in the as-cast state; try to use the frequency wave harmonic vibration aging process to remove stress reduction Thermal aging process.
4. Save materials and work hard to reuse. Because the production of any material requires energy.
5. Large-scale production of precision casting enterprises, that is, the output of each casting unit is above 5000t. Because of the large output of the enterprise, the working hours of the furnace are long, and the heating energy consumption of the furnace itself can be greatly reduced by spreading the energy consumption per ton of precision castings.
6. In order to improve the management level of the alloy steel foundry, reduce the scrap rate. For example, for a precision casting plant with an annual output of 5000t, every 1% drop in the scrap rate is equivalent to the production of 50t more precision castings. Based on the energy consumption per ton of 400kgee, it can save 20t of standard coal a year, which means that every ton of precision castings is reduced. Energy consumption of 4kgee.