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Metal material forming process summary


Material forming method is an important part of part design. Water atomized pure iron powder is also a problem that manufacturers are extremely concerned about, and it is also a key factor in the material processing process. Today, I will take you to see the metal metal forming process.


Liquid metal is poured into a mold cavity suitable for the shape and size of the part, and it is cooled and solidified to obtain a blank or part. The production method is usually called metal liquid forming or casting.

Process flow: liquid metal → filling → solidification shrinkage → casting

Process characteristics:

1. It can produce parts with any complicated shape, especially those with complicated inner cavity shape.

2. Strong adaptability, unlimited alloy types, almost unlimited casting size.

3. Wide source of materials, scrap can be remelted, and equipment investment is low.

4. High scrap rate, low surface quality and poor labor conditions.

Casting classification:

(1) Sand casting

Sand casting: A casting method for producing castings in sand molds. Steel, iron and most nonferrous alloy castings can be obtained by sand casting.

Process flow:

Sand casting process

Technical characteristics:

1. Suitable for making blanks with complex shapes, especially with complex inner cavity;

2. Wide adaptability and low cost;

3. For some materials with poor plasticity, such as cast iron, sand casting is the forming process of manufacturing its parts or blanks.

Application: Automotive engine block, cylinder head, crankshaft and other castings

(2) Investment Casting

Investment casting: Usually refers to making patterns in fusible materials, covering the surface of the pattern with several layers of refractory materials, and melting the pattern out of the mold shell to obtain a mold without a parting surface, which is baked at high temperature After that, the casting scheme can be filled with sand. Often called "lost wax casting".

Process flow:

Investment Casting Process

Process characteristics


1. High dimensional accuracy and geometric accuracy;

2.High surface roughness;

3, can cast complex castings, and cast alloys are not restricted.

Disadvantages: complicated procedures and high cost

Application: It is suitable for the production of small parts with complex shapes, high precision requirements, or difficult to perform other processing, such as turbine engine blades.

(3) die casting

Die-casting: High-pressure metal liquid is pressed into a precision metal mold cavity at high speed, and the metal liquid is cooled and solidified under pressure to form a casting.

Process flow:

Process characteristics


1. The metal liquid is subjected to high pressure and fast flow rate during die casting

2. Good product quality, stable size and good interchangeability;

3, high production efficiency, the use of die casting molds more;

4, suitable for large-scale mass production, good economic benefits.


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