Powder metallurgy copperized agent and method for producing the same

Abstract

The invention relates to a powder metallurgy copperizing agent, which is characterized in that the copperizing agent essentially consists of the mass percentages of materials of: 1.7 percent to 2.1 percent of Fe powder, 3.9 percent to 4.3 percent of Mn powder, 93.6 percent to 94.4 percent of Cu powder. The producing method of the copperizing agent is that: the prepared material is mixed in a double tapered mixer at a rotating speed of 19 to 21r/min for 30 to 35min. the powder metallurgy copperizing agent of the invention does not erode products and affect the strength of products.

Description

technical field [0001] The invention relates to powder metallurgy. In particular, it relates to a copper infiltrating agent for powder metallurgy. It belongs to the technical field of powder metallurgy materials. Background technique [0002] The powder metallurgy copper infiltration process is a process for obtaining high-density and even dense powder metallurgy parts under ordinary pressing pressure (500Mpa-600Mpa). The impact force, sealability, wear resistance and machinability of parts produced by this process are much higher than those of warm pressing, repressing and refiring, so it occupies a considerable share in high-end powder metallurgy products. However, since the copper infiltration of powder metallurgy is carried out in the temperature range of 1090°C-1150°C, 1120°C is usually taken. In this temperature range, the solubility of iron in copper is about 3.8%-4%, which leads to direct copper infiltration with Cu block and powder metallurgy parts. The copper in...

AI Technical Summary

Problems solved by technology

In this temperature range, the solubility of iron in copper is about 3.8%-4%, which leads to direct copper infiltration with Cu block and powder metallurgy parts. The copper infiltration efficiency is about 85%. Corrosion cracks will be formed on the surface and inside of the parts, affecting The appearance and impact strength of the product, which leads to a high volume (25%-35%) of defective products

Usually machining is used to remove defective products, which increases the processing cost