1. Precision casting material and mechanical properties provisions: the process characteristics and mechanical properties of the material may depend on the type of blank. For example, cast billets of pig iron parts; common steel bars with simple shapes and low mechanical property requirements; in order to obtain good mechanical properties, forgings should be selected; when the shape is simple, cast steel parts should be used. Rare metal parts commonly used profile or cast billet material complex, engineering machinery water glass casting mechanical properties required low.
2. The structural shape and specifications of the parts: large and simple parts of the blank more sand mold casting or random calcination, the structure of the complex blank more forging, small parts of the blank can be used die forgings or pressure, steel parts of the blank is mainly used for forgings; if the diameter of the steps is not very large, can be used on the bar; if the specification of each step is very different, then forgings should be used.
3. Current production conditions:In determining the embryo material, the actual production conditions should be integrated, such as the actual level and capacity of on-site production. The probability of outsourcing, etc., otherwise it is unrealistic.
4. Make full use of new technologies and materials: In order to save materials and energy and improve processing efficiency, full consideration should be given to precision castings. Precision forging. Cold rolled. Extrusion processing. Powder metallurgy. Forging methods and materials, such as shaped steel and rubber products. That way, the amount of machining can be greatly reduced, or even eliminated. The economic income is very obvious.
What are the characteristics of water glass casting process? What are the main uses including
Marine water glass casting has strong adhesion, high strength, good alkali resistance, good temperature resistance, poor acid and water resistance. Colorless orthogonal and rake dryer crystalline or white to gray small pieces or powder. Can weathering. Lost at 100°C six molecule carboxyl group. Easily soluble in water, soluble in dilute sodium hydroxide solution, insoluble in alcohol and acid. Dissolving point 1088℃. Slightly toxic, semi-lethal agent (rat, oral) mg/kg (no carboxyl group)
【Use】Analytical reagent, fireproofing agent, adhesive.
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