How To Significantly Increase The Density Of Powder Metallurgy Products

How to significantly increase the density of powder metallurgy products? The flow warm pressing process is a new powder metallurgy technology that mixes appropriate amounts of coarse powder and fine powder and thermoplastic lubricant at a certain temperature to prepare a mixed powder with uniform performance and good fluidity, and then presses it at 80℃ to 130℃, and finally sintering to obtain the product.

Compared with traditional powder metallurgy technology, the flow warm pressing process overcomes the latter’s shortcomings in forming complex geometric shapes, and avoids the high cost of metal injection molding technology. It has the following characteristics:
1. Parts can be made into complex geometric shapes. Conventional warm pressing processes are difficult to produce parts with grooves, holes, and threaded holes perpendicular to the pressing direction, and usually require secondary processing. However, it becomes very simple to use the flow warm pressing process to manufacture this type of parts.

2. Density is improved and performance is more uniform. The powder density of the flow warm pressing process is high, so the density of the semi-finished product after warm pressing will also increase. Not only that, the density of the product made by the flow warm pressing process will also be more uniform, because the powder in the flow warm pressing process has good fluidity.

3. Simplify the production process and make the manufacturing cost lower. The traditional warm pressing process requires secondary processing, but the flow warm pressing process does not require it. In addition, the special binder and lubricant used in the flow warm pressing process are moderate, and the mixed secretion equipped also has a high viscosity and critical shear strength, and will not deform during the heating process, so the binder can be directly removed during the sintering process. It not only simplifies the manufacturing process, but also makes it into

4. It has strong adaptability. Researchers believe that all powder systems can theoretically be applied to the flow warm pressing process, but one thing to note is that the powder system needs to have good sintering performance in order to achieve the required density and performance.

Powder metallurgy lubricants have the following advantages:

1. Good green strength.

2. Good surface quality of products.

3. No black spots on the products, and high sintering yield.

4. Clean and hygienic: It is a pure organic matter, completely decomposed at high temperature, without residue, and does not pollute the sintering furnace.