Best tells you how to improve the shrinkage of powder metallurgy parts
time：2020-05-13Views：657 Author：Best Seiko
The size control of powder metallurgy parts is often affected by the uniformity of the powder filling. Due to the unevenness of the powder filling and the uneven density of the green embryo, the shrinkage rate after sintering is uneven. Is there any way to improve it? 1. Powder with good fluidity should be used as much as possible. Generally speaking, the powder with high density has a fast flow rate, which can shorten the filling time and increase the forming speed. More importantly, it is easy to fill and can be used in all corners of complex parts. With enough powder to fill in, the size of the embryo body after forming will be more precise. There are two kinds of powders, the flow rate of which is 28s/50g and 32s/50g respectively. When using the former, the distribution of the length of the embryo body is narrow while the latter is wider. 2. In the past year, some manufacturers have provided new powder feeding boxes on the market. The design concept is to install a ventilating pipe in the powder feeding box to provide air flow to make the powder flow easily, just like the powder in the fluid bed. The input value of this gas can be matched with the shape of the workpiece to achieve a very good effect. The standard tolerance of its thickness is reduced from 0.0016" to 0.0004", which shows that its effect is quite good. Shenzhen Best Precision Technology Co., Ltd. is a diversified technology company integrating metal injection molding, metal and ceramic 3D printing, and metal jewelry development and production. Best Precision has reached a strategic cooperation with well-known domestic and foreign feeding companies (Kadem Feeding) and BSF for MIM product development and production, mainly for metal powder injection molding, metal powder injection molding, powder injection molding, powder injection molding, Metal 3D printing wire, metal powder injection molding factory, metal powder injection molding factory, powder injection molding factory, powder injection molding factory, MIM process, MIM processing, MIM factory to provide customers in various industries around the world with large quantities, high quality and reasonable MIM products at a price. The company has assembled a team of senior experts in technology, management and market development in the industry, adhering to many years of MIM technology experience and industrial production operation experience, with internationally mature MIM technology, efficient supply chain management and rapid and effective large Large-scale manufacturing capabilities provide customers with a one-stop solution from the preliminary design, sample development and mass production of MIM products.