Method for improving performance of high-speed pressing prepared iron-based powder metallurgy parts

Abstract

The invention discloses a method for improving the performance of high-speed pressing prepared iron-based powder metallurgy parts. The method comprises the following steps that S1, raw materials are weighed by weight part; S2, the surface of a mold is uniformly coated with a layer of zinc stearate powder to be sintered for standby application; S3, high-pressure water mist is used for atomizing iron powder, and a heavy hammer is used for beating the mold and the mixed powder in a press box under a high-speed condition; S4, the mold continuously advances from an inlet furnace door to an outlet furnace door in a hydrogen furnace, and articles in the mold are obtained as initial products after cooling; S5, the initial product are put into the pressing box again, and the initial products in thepressing box are beaten under the high-speed condition by using the heavy hammer to obtain the high-speed pressing prepared iron-based powder metallurgy parts. The method adopts the high-speed pressing method, so that the pressure during pressing is changed from static pressure to dynamic pressure, the action time is short, and the instantaneous impact force is large, so that the density of finished products is large, the time is shortened, and the control over product quality is facilitated.

Description

Technical field [0001] The invention relates to the technical field of powder metallurgy, in particular to a method for improving the performance of iron-based powder metallurgy parts prepared by high-speed pressing. Background technique [0002] With the continuous development of powder metallurgy technology, powder metallurgy products have been involved in various fields, especially in the automotive industry, powder metallurgy products have played an indispensable role, and their application value has received universal attention. At present, the research of powder metallurgy products has been The trend towards mass production of high-performance powder metallurgy products. With the maturity and diversification of various powder metallurgy technologies, the requirements for the performance of powder metallurgy products are getting higher and higher, and iron-based powder metallurgy products have high The characteristics of high density and high performance cater to the increas...

AI Technical Summary

Problems solved by technology

In the Chinese patent with the publication number CN102773481B, a method for improving the performance of iron-based powder metallurgy parts prepared by high-speed pressing, iron-based powder metallurgy parts with high mechanical properties were successfully prepared by combining nano-metal powder with advanced high-speed pressing technology. It has the characteristics of simple preparation process, low cost, high production efficiency, stable part density and mechanical properties, and high sintered dimensional accuracy of parts, which further promotes the development of high-speed pressing technology in the field of powder metallurgy to produce high-performance parts. Difficult mold and incomplete shortcomings of high-speed pressing