What is the Basic Feature of the Gray Casting?

As a Grey Iron Casting Company, share it with you.

The basic feature of high-density molding sand with gray iron castings is that the amount of pulverized is also lower. Therefore, the following points should be grasped while sand.

Grey Cast Iron Casting

1. Clay content and mud. Sands with high clay content, and increased compression, high strength, usually effective bentonite controls at 7% to 10%. The sum of the effective clay and dead clay in the shaped sand is equivalent to the mud amount, and the mud contains generally controlled 12% to 16%. The mud is too high or too low, which will affect the performance indicators of the sand.

2. Moisture. The moisture in the production of disappeared castings is the main factor in determining the plasticity and bonding force of clay. When the water is too high, it is easy to cause deterioration of clay stickiness, and the fluidity of the sand is lowered, and the uniform mold density is not obtained. When the water is too low, the sand is not easily mixed, the type sand is low, the brittle is large, and the moldability is poor. It is easy to produce a viscable defect. The general moisture should be controlled by 10% to 20% higher than the peak of the wet pressure intensity.

3. Plasma particle size. When the high-density styling is high, the extension is high, and the casting is large, so the plasma particle size should not be excessively concentrated, and the original sand particles are circular or polygonally, and three sieve sand or four sieve sand are generally selected.

Enhancement method

Adding gray iron castings tensile strength method:

1. A small amount of carbon can be added to the raw material, in the carbon content in the gray iron casting, the amount of carbon is mostly 2.6% to 3.6%, and the content of silicon is 1.2% to 33.0%. When determining the wall thickness of the gray iron casting, manganese should also be added, and the manganese content should be. 4% .

2. Improve the tensile strength of the gray iron castings, add the appropriate amount of micro-alloy, chromium, molybdenum, and tin or other elements to improve the tensile strength of the gray iron castings, and do the gestation treatment of iron water.

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