The invention discloses a water-soluble ceramic core and a preparation method thereof. The water-soluble ceramic core is prepared from the following raw materials in parts by weight: 100-120 parts of electrically fused corundum powder and 20-40 parts of water-soluble inorganic salt, wherein the water-soluble inorganic salt is a mixture of 20-30 parts of NaCl, 5-75 parts of Na2CO3 and 5-75 parts of K2CO3, and the raw materials are subjected to press-forming and then the press-formed materials are sintered for 1 h at the temperature of 720-750 DEG C to obtain the ceramic core. Compared with the prior art, the water-soluble ceramic core has the following advantages: the water-soluble ceramic core is prepared by the three water-soluble salts, and the relative proportion of the salts can be adjusted according to requirements on the performance of the core in the actual use process, and further, the performance of the core is adjusted. For example, when the strength of the core is expected to be high, the consumption of K2CO3 can be appropriately increased; and when excellent storability of the core is expected, the consumption of K2CO3 needs to be reduced.

Water-soluble ceramic core and preparation method thereof

The invention discloses a monomer fused salt based soluble mold core and a preparation method and application thereof, and belongs to the technical field of casting. The soluble mold core comprises monomer fused salt, silicon dioxide and silicic acid. The monomer fused salt is water-soluble monomer fused salt, and the fusing point of the monomer fused salt ranges from 40 DEG C to 1,500 DEG C. According to the proportion of the monomer fused salt, the silicon dioxide and the silicic acid by weight part, the monomer fused salt ranges from 80 parts to 99 parts, the silicon dioxide ranges from1 part to 20 parts, and the silicic acid ranges from 1 part to 5 parts. The soluble mold core is good in water solubility, the casting quality is high, the soluble mold core is easy to remove, the core removal time is short, and the soluble mold core can be removed through water under normal temperature; and after water is removed from the fused melt, repeated use can be achieved, cost is low, and energy saving and environment protection are achieved.

Monomer fused salt based soluble mold core and preparation method and application thereof

The invention discloses a soluble core based on fused salt and a preparation method and application of the soluble core, and belongs to the technical field of casting The basis material of the soluble core includes, by weight, 80-99 parts of the fused salt, 1-20 parts of silicon dioxide and 1-5 parts of silicic acid The fused salt is water soluble fused salt The melting point of the fused saltis 40-1200 DEG CThe soluble core is good in water solubility and high in casting quality; the soluble core is easy to remove; the core removing time is short; at the normal temperature, the soluble core can be removed through water and the fused salt can be used repeatedly after water is removed; the cost is low; and energy conservation and environment protection are achieved

Soluble core based on fused salt and preparation method and application of soluble core

The invention discloses a method for preparing a water-soluble mold core additive and belongs to the technical field of casting. The method comprises the following steps: respectively dissolving a water-soluble high polymer material and a water-soluble inorganic salt into water, mixing, testing the pH value, dropping an organic acid by using a burette, and adjusting the pH value of the mixed solution to 7, thereby obtaining the additive. Due to adoption of the organic high polymer material in the additive prepared by using the method, a water-soluble mold core has relatively high primary strength; the pH value is adjusted by using the organic acid, so that the problem that a micro-drip ejection head is short in service life is solved; as the water-soluble inorganic slat is used as an adhesive of the mold core, the strength can be improved.

Method for preparing water-soluble mold core additive

The invention relates to the field of die casting, in particular to a salt core die-casting method. According to the method, a salt core is manufactured through the die casting process; the soluble salt core is put into a die casting die to obtain an aluminum die casting part; and finally, the aluminum die casting part is subjected to acid pickling and drying to obtain a qualified aluminum die casting part. Through the salt core die-casting method, the problem that a special-shaped inner cavity casting part cannot be manufactured through die casting can be solved. Moreover, the salt core manufactured through the die casting process is compact in structure, not prone to alumetizing, fast in dissolution and convenient to take, and the obtained casting part is good in quality.

Salt core die-casting method

The invention belongs to the technical field of casting, and particularly relates to a high-strength composite salt core material for low-melting-point alloy casting. The high-strength composite salt core material comprises, by mass, 70%-100% of water-soluble inorganic salt and 0%-30% of a reinforcement, wherein the water-soluble inorganic salt comprises one of low-melting-point salts including potassium nitrate and sodium nitrate, and at least one of high-melting-point salts including potassium chloride, sodium chloride, potassium bromide and sodium bromide, and positive ions of the low-melting-point slats are the same as positive ions of the high-melting-point salts. The invention further discloses a preparation method of a high-strength composite salt core, and an obtained salt core product. The prepared composite salt core has extremely high bending strength, excellent hygroscopicity and small volume shrinkage, and the comprehensive performance is excellent. In addition, the preparation technique of the high-strength composite salt core is simple, raw materials are cheap, and industrial production is easy.

Liu Fuchu

Papers

High-strength composite salt core material for low-melting-point alloy casting, salt core and preparation method