Metal parts processing surface treatment process

u200bMetal parts processing surface treatment is to meet the product's corrosion resistance, wear resistance, decoration or other special functional requirements. For metal parts processing, the more commonly used surface treatment methods are mechanical grinding, chemical treatment, surface heat treatment, spraying surface, etc. . 1. Surface deformation strengthening. Surface deformation strengthening refers to a surface strengthening process that plastically deforms steel at room temperature to increase its surface hardness and generate favorable residual compressive stress distribution. Shot peening Shot peening is a technology that sprays a large number of high-speed moving projectiles onto the surface of the part, just like countless small hammers hammering the metal surface, so that the surface and subsurface of the part have a certain degree of plastic deformation to achieve strengthening. The rolling treatment uses freely rotating hardened steel rollers to roll the machined surface of the steel part to produce plastic deformation, flatten the rough peaks on the surface of the steel part, and form favorable residual compressive stress, thereby improving the resistance of the workpiece Abrasion and fatigue resistance. Application: cylindrical surface, cone surface, flat surface and other simple parts surface expansion (extrusion or extrusion) surface expansion is to squeeze a steel ball with a diameter slightly larger than the aperture or a expansion tool of other shapes through the workpiece at room temperature The inner hole has been processed to obtain an accurate, smooth and strengthened surface. 2. Surface cladding strengthening. Surface cladding 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. The metal spraying technology heats the metal powder to a molten or semi-melted state, atomizes it with a high-pressure airflow and sprays it on the surface of the workpiece to form a coating. The process is called thermal spraying.