Post-processing finger pressing sintering after further processing, according to the product specific requirements to decide whether need post-processing. Commonly used post-processing methods have pressure, impregnation, heat treatment, surface treatment and machining, etc.

1. After pressure to improve the physical and mechanical properties of sintered body pressure processing, including finishing and plastic, etc. After finishing is to the desired size, by forming die for sintered body pressure in order to improve the precision. Plastic surgery is to achieve specific surface shape is complex, through pressure plastic mould for products in the correction of distortion and reduce the surface roughness value. After pressure is suitable for the demand is higher and better plastic products, such as iron base, copper base products.

2. Impregnated with non-metallic substances (such as oil, paraffin wax and resins) sintered body pore filling method. Impregnation methods have oiled, leaching, molten metal, plastic, etc. Immersion oil into lubricating oil in sintered body, improve its self-lubrication and anti-rust performance, often used in iron and copper base oil bearing. Plastic is using ptfe dispersion, after curing, oil free, often used in metal plastic antifriction parts. Molten metal can increase the strength and abrasion resistance, iron-based materials often used copper or lead.

3. Heat treatment of sintered body is heated to a certain temperature, then by controlling the cooling methods, such as processing, to improve the performance of products. Commonly used heat treatment method have quenching, heat chemical heat treatment, mechanical processing, such as process method generally similar to dense material. Wear resistance of iron base does not impact and requirements can be used as a whole quenching parts, due to the existence of the pore can reduce internal stress, generally can not temper. Requirements and hard ductile iron base parts can be used in hardening or carburizing and quenching. Commonly used methods for hot forging is to obtain dense parts, hot forging products of tiny grains, and of high strength and toughness.

4. Surface treatment commonly used the surface treatment of zinc steam treatment, electroplating, etc. Steam treatment is artifacts in 500 ~ 560 ℃ hot steam heating and keep a certain time, make its surface and pore surface to form a layer of dense oxidation technology, used for rust prevention, abrasion resistance and high pressure permeability of iron base parts. Electrochemical plating principle in deposition out strong cladding on the surface of products, the process method with dense material. A rust prevention, wear-resisting and decorative plating used for parts.

In addition, you can via forging, welding, machining and special processing methods such as change the shape of sintered body or further improve accuracy, in order to meet the final requirements of the parts. Electrical discharge machining, electron beam machining, laser machining and other special processing method, and ion nitriding, ion implantation, vapor deposition, thermal spraying and surface engineering technology has been used in powder metallurgy products in the post-processing, to further improve the production efficiency and product quality.