How to choose mechanical parts material?

Mechanical parts refers to the integral basic unit of the machine, such as bolts, screws, keys, gears, shaves, spring pins, etc. BAI mechanical parts are divided into general parts and special parts General parts refers to the parts that can be widely used in a variety of machines, special parts refers to the parts that can only be used in a particular kind of machine.

From a variety of materials to choose suitable materials, is a subject to many factors restricted by the work, the following metal materials (mainly iron and steel) general selection of principles for a brief introduction of the principle of the selection of mechanical parts material is: the required materials should meet the requirements of the use of parts, good technology and economy, etc.

1.Operating requirements (primary consideration):

1) Operating conditions of parts(Shock, shock, high temperature, low temperature, high speed and high load should be treated with caution);

2) Limitations on the size and quality of parts;

3) The importance of parts(Relative importance to machine reliability);

 2.Process requirements:

1) Blank manufacturing(Casting, Forging, Cutting Plate, Cutting Bar);

2) Mechanical processing;

3) Heat treatment;

3.Economical requirements:

1) material price(The comparison between the blank cost and processing cost of ordinary round steel and cold-drawn profiles, precision casting and precision forging);

2) Processing volume and processing cost;

3) Material utilization rate(Such as plate, bar material, profile specifications, reasonable use);

4) Local quality principle;

5)Substitution (try to use cheap materials to replace the relatively expensive rare materials)

Also, consider the availability of local materials;