What are the sintering methods of powder metallurgy
Nov 19, 2022
What are the sintering methods of powder metallurgy
It is believed that we all know that powder metallurgy can be manufactured only through a series of processes such as powder production, compaction, sintering and post-treatment. Among them, powder metallurgy sintering is a high temperature treatment process to further combine the compact or loose powder to improve the strength and other properties. However, due to the differences, there are many kinds of powder metallurgy sintering methods. What are the common powder metallurgy sintering methods? Here is a brief introduction of the Zhongwei Precision Editor:
1. Liquid phase sintering
If there are more than two components in the powder compacts, the sintering may be carried out above the melting point of some component, so a small amount of liquid phase appears in the powder compacts during sintering.
2. Pressure sintering
During sintering, pressure is applied to the powder to promote its densification process. Pressurized sintering is sometimes synonymous with hot pressing. Hot pressing is a process that combines powder forming and sintering to directly obtain products.
3. Activated sintering
In the sintering process, some physical or chemical measures are taken to greatly reduce the sintering temperature and shorten the sintering time, while the performance of the sintered body is improved.
4. Electrospark sintering
When the powder is pressed, direct current and pulse current are applied to make the electric arc between the powder particles for sintering; During sintering, pressure is gradually exerted on the workpiece to combine the two processes of forming and sintering.
The above contents are four common powder metallurgy sintering methods. Through these sintering methods, the powder metallurgy sintering process can be effectively completed. Because in the process of powder metallurgy sintering, the physical and chemical processes such as mutual flow, diffusion, melting and recrystallization of powder particles will occur, which will further densify the powder and eliminate some or all of its pores.It is believed that we all know that powder metallurgy can be manufactured only through a series of processes such as powder production, compaction, sintering and post-treatment. Among them, powder metallurgy sintering is a high temperature treatment process to further combine the compact or loose powder to improve the strength and other properties. However, due to the differences, there are many kinds of powder metallurgy sintering methods. What are the common powder metallurgy sintering methods? Here is a brief introduction of the Zhongwei Precision Editor:
1. Liquid phase sintering
If there are more than two components in the powder compacts, the sintering may be carried out above the melting point of some component, so a small amount of liquid phase appears in the powder compacts during sintering.
2. Pressure sintering
During sintering, pressure is applied to the powder to promote its densification process. Pressurized sintering is sometimes synonymous with hot pressing. Hot pressing is a process that combines powder forming and sintering to directly obtain products.
3. Activated sintering
In the sintering process, some physical or chemical measures are taken to greatly reduce the sintering temperature and shorten the sintering time, while the performance of the sintered body is improved.
4. Electrospark sintering
When the powder is pressed, direct current and pulse current are applied to make the electric arc between the powder particles for sintering; During sintering, pressure is gradually exerted on the workpiece to combine the two processes of forming and sintering.
The above contents are four common powder metallurgy sintering methods. Through these sintering methods, the powder metallurgy sintering process can be effectively completed. Because in the process of powder metallurgy sintering, the physical and chemical processes such as mutual flow, diffusion, melting and recrystallization of powder particles will occur, which will further densify the powder and eliminate some or all of its pores.
