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What is the surface treatment process of metal parts processing?

Update:06-01-2021
Summary:

The surface treatment of metal parts processing is to m […]

The surface treatment of metal parts processing is to meet the requirements of corrosion resistance, wear resistance, decoration or other special functions of the product. For metal parts processing, the more commonly used surface treatment methods are mechanical polishing, chemical treatment, surface heat treatment, spraying surface, etc.

1. Surface deformation strengthening
Surface deformation strengthening
Surface deformation strengthening refers to a surface strengthening process that plastically deforms steel parts at room temperature to increase the surface hardness and generate favorable residual compressive stress distribution.

Shot blasting
Shot peening is a technique in which a large number of high-speed moving projectiles are sprayed onto the surface of the part, just like countless small hammers hitting the metal surface to cause certain plastic deformation of the surface and subsurface of the part to achieve strengthening.

Rolling treatment
Use freely rotating hardened steel rollers to roll the machined surface of the steel to produce plastic deformation, flatten the rough peaks on the surface of the steel, and form favorable residual compressive stress, thereby improving the wear resistance and Anti-fatigue ability.

Application: cylindrical, conical, flat and other simple parts

Surface expansion (squeeze or squeeze)
Surface expansion is to squeeze a steel ball or other shape expansion tool with a diameter slightly larger than the aperture through the processed inner hole of the workpiece at room temperature to obtain an accurate, smooth and strengthened surface.

2. Surface coating strengthening
Surface coating strengthening

Surface coating strengthening is a surface strengthening process in which one or more layers of other metals or non-metals are coated on the metal surface by physical or chemical methods.

Metal spraying technology
The process of heating metal powder to a molten or semi-melted state, atomizing it with high-pressure airflow and spraying it on the surface of the workpiece to form a coating is called thermal spraying.

 

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