Explanation

It is also called pressure sintering. It is to put powder in the mold cavity. At the same time, the powder is heated to the normal sintering temperature or lower. After a short time of sintering, the products become dense and uniform, which is a kind of strengthened sintering. In principle, all powder parts that can be made by general methods are suitable for hot pressing. Especially suitable for manufacturing M materials such as fully dense refractory metals and their compounds. The hot pressing process has the following advantages: greatly reducing the forming pressure and shortening the sintering time; Can pressing large parts; When hot pressing, powder has good plasticity and can be pressed into thin-walled tubes, thin sheets, threaded and other special-shaped products; The partidesize and hardness are not obvious to the hot pressing process, so some hard and brittle powder can be pressing. However, the hot pressing method also has obvious disadvantages: high requirements for the die materials, and short die life; Single piece production - low efficiency; The surface of the product is rough. Low accuracy; High cost.

Classification