Entries by Hexin Africa

Nine factors of casting porosity formation and 5 improvement measures of process (2)

1) The technological measures to prevent subcutaneous stomata mainly include: 2) Desulfurization treatment. The so-called desulphurization, that is, as far as possible, the sulfur in the molten iron is transferred to the slag, and then eliminated, the less FeS in the molten iron, the higher the desulphurization efficiency, appropriately increasing the basicity of the desulphurized […]

Heat Treatment Machine Delivery

At the beginning of July, passed through almost half-year after signing the contract, tilting type heat treatment machine along with the other products, like mining used rollers, have dispatched to Shanghai port to Kenya company. The estimated delivery time is about 45days. Trust our client will be satisfied with our machine.

Detailed introduction of permanent mold casting process -4

After the casting process drawing, the metal mold design can be carried out. The design content mainly includes determining the structure, size, core, exhaust system, and ejector mechanism of the metal mould. The designed metal mold should be simple in structure, convenient in processing, reasonable in material selection, safe and reliable

Detailed introduction of permanent mold casting process -3

According to some characteristics of metal mold casting, the following points should be paid to when designing a gating system: The casting speed of metal is high, which is more than about 20% of the sand mold. Secondly, when the liquid metal is filled, the gas in the mold cavity should be removed smoothly, the […]

Detailed introduction of permanent mold casting process -1

According to the characteristics of the permanent mold casting process, in order to ensure the casting quality, simplify the permanent mold structure and make full use of its technical and economic benefits, the structure of permanent mold casting must be analyzed and a reasonable casting process must be worked out.

Quenching and tempering technology of ductile iron castings

Austenitizing is the first step in the quenching of Ductile Iron Castings. The austenitizing temperature is 860-880 °C, and the holding time is 1 hour for every 25mm thick casting, which is the same as that of normalizing and annealing. After the insulation is finished, it cools quickly in the flowing air. After quenching, the castings […]