High-performance multi-element cast copper alloy for impeller and preparation method and application of high-performance multi-element cast copper alloy

Abstract

The invention relates to a high-performance multi-element cast copper alloy for impeller and a preparation method and application of the high-performance multi-element cast copper alloy, and aims to effectively solve the requirement problems that excellent mechanical properties are required and actual impeller requirements can be met by using a high-performance multi-element cast copper alloy forimpellers. According to the preparation method, the cast copper alloy is prepared from the following chemical components in percentage by mass: 12.0-20.0% of Zn, 2.0-6.0% of Si, 1.0-8.5% of Fe, 0.5-3.2% of Cr, 0.02-0.08% of Zr, 0.1-1.3% of Mg, 0.1-3.8% of Ti, 0.1-1.4% of V, 0.02-0.42% of Sc, 0.01-0.25% of La, 0.01-0.09% of Be, 0.05-1.0% of Ni, 0.1-0.65% of Al, 0.02-1.3% of Mn, 0.11-0.25% of Re andthe balance of Cu. The cast copper alloy is scientific and reasonable in component, rich in raw material, simple in preparation method, easy to produce, low in cost, good in performance, easy to popularize and apply and remarkable in economic and social benefit, is capable of effectively solving production of high-performance impellers, can be applied to machining processes such as common gravitycasting, differential pressure casting and eccentric casting, and has remarkable production processing advantages.

Description

technical field [0001] The invention relates to an alloy, in particular to a high-performance multi-element cast copper alloy for an impeller, a manufacturing method and application thereof. Background technique [0002] At present, most of the commonly used manufacturing materials for ship pump bodies, impellers, valves and other parts are cast tin bronze, cast brass, cast tin-lead bronze, etc. These alloys show a paste-like solidification characteristic when solidified, and their crystallization temperature range is as high as tens of Even hundreds of degrees Celsius, the solidified structure of the obtained casting has coarse grains, serious element segregation, many casting defects, and the mechanical properties of the material are low (the tensile strength is generally lower than 300MPa). The marine pump body produced by it Parts such as impellers, valves, etc. are prone to problems such as short service life of parts, or even defective products. [0003] With the rapi...

AI Technical Summary

Problems solved by technology

[0002] At present, most of the commonly used manufacturing materials for ship pump bodies, impellers, valves and other parts are cast tin bronze, cast brass, cast tin-lead bronze, etc. These alloys show a paste-like solidification characteristic when solidified, and their crystallization temperature range is as high as tens of Even hundreds of degrees Celsius, the solidified structure of the obtained casting has coarse grains, serious element segregation, many casting defects, and the mechanical properties of the material are low (the tensile strength is generally lower than 300MPa). The marine pump body produced by it , impellers, valves and other parts are prone to problems such as short service life of parts and even defective products