Casting and forging production technology is different, the processing of products for different purposes, as well as the advantages and disadvantages of different products.Forging by hammering, etc., to make a metal material in a plastic state into a workpiece of a certain shape and size, and to change its physical properties.Casting is a process of melting metal into liquid and pouring it into a mold. After cooling, solidification and cleaning, the desired shape of the casting is obtained. It can be made into various kinds of objects with complex shapes.
Casting: molten liquid metal filling cavity cooling, easy to produce air holes in the middle of the parts;Metal is heated, melted and poured into sand molds or molds, where it cools and solidifies into objects.
Forging: it is mainly formed by extrusion at high temperature, which can refine the grains in the parts.By hammering and other methods, make the metal material in the plastic state into a workpiece with a certain shape and size, and change its physical properties.
What are the differences between casting and forging
1. Different manufacturing techniques
Casting is a single forming.After the metal is melted into liquid, it is cast into the casting cavity that is suitable for the shape of the part. After cooling, solidification and cleaning, the processing method of the part or blank is obtained.The foundry specialty focuses on the metal smelting process, as well as the process control in the casting process.
Forging is slow shaping.Using the forging machinery to exert pressure on the metal billet, extrusion, hammering and other methods, so that the metal materials in the plastic state become a processing method with a certain shape and size of the workpiece.Forging is solid plastic forming, hot processing, cold processing, such as extrusion, drawing, rough pier, punching and so on belong to the forging.
2. Different uses
Forging is generally used in the processing of forgings of a certain shape and size. Casting is a more economical method of forming a blank. It is generally used in parts with complex shapes.
3. Different strengths and weaknesses
Forging advantages:
Forging can eliminate defects such as as-cast porosity produced in the smelting process and optimize the microstructure. At the same time, the mechanical properties of forgings are generally better than those of castings of the same material due to the preservation of a complete metal streamline.In the related machinery, the important parts with high load and severe working conditions, in addition to the simple shape can be rolled plate, profile or welding parts, more forgings are used.
Casting advantages:
1. Can produce parts with complex shape, especially rough blank with complex inner cavity.
2 wide adaptability, industrial commonly used metal materials can be cast, a few grams to hundreds of tons.
3. Raw materials have wide sources and low prices, such as scrap steel, waste parts, chips, etc.
4. The shape and size of the casting are very close to the parts, which reduces the amount of cutting and belongs to no-cutting processing.
5. Widely used, 40%~70% of agricultural machinery, 70%~80% of the weight of machine tools are castings.
Casting disadvantages:
1. Mechanical properties are not as good as forgings, such as thick organization, defects, etc.
2. Sand casting, single piece, small batch production, labor intensity of workers.
3. The casting quality is unstable, there are many processes, and the influencing factors are complex, which are easy to produce many defects.