Powder metallurgy technology is a new type of near-net forming technology. Metal powder is melted, heated, injected and pressed to form the required mold. For some special materials that are difficult to machine, such as refractory metals and high alloying, traditional machining methods are no longer competent, and powder metallurgy has become the main machining method, especially in high-precision gears and automobile parts. Next, I will tell you about the basic process flow of powder metallurgy technology, so that you can have a deeper understanding of powder metallurgy.

1. Basic flow of powder metallurgy process

Step 1: prepare the raw materials into metal powder.

Preparing raw materials into metal powder by oxide reduction and mechanical method.

Step 2: making blank powder.

According to different product requirements, the powder is mixed evenly in a certain equal proportion by wet method, dry method or semi-dry method to make green powder, and the proportion of powder must be controlled well.

Step 3: Forming the mold.

The mixed green powder is put into the corresponding powder metallurgy molding die, and the required shape is formed by pressure molding or pressureless molding.

Step 4: Sintering the powder metallurgy model product.

The molded model can be sintered by multi-element sintering or unit sintering, and the physical and mechanical properties required by the final component product can be formed. Powder metallurgy sintering process is the most important step in the whole process, and it is also the decisive process of product performance.

Step 5: detailed treatment after sintering.

For products that require high product precision, after the sintering process, follow-up finishing, oil immersion, electroplating, or a small amount of machining, heat treatment and other details are needed to make the stability and hardness of the products better.

2. In what fields is powder metallurgy applied?

1: automobile field

Powder metallurgy spare parts for gears, engine rotors, tailgates and wipers in the automotive field.

2. The field of digital electronic equipment

Application of powder metallurgy technology in smart phones, notebook computers, smart clothes and household appliances.

3. Hardware tools field

Locks, locking tongues, power tools and hardware tools are all made by powder metallurgy technology.

4. Communication field

The gear box, antenna and other parts of base station communication all adopt powder metallurgy technology.

5. The field of medical devices

Medical devices have higher requirements for parts, and powder metallurgy net near net forming technology is very suitable for the application of medical device parts, with higher precision and cleaner products.