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Vacuum high temperature annealing method of copper alloy parts with high zinc contents

A high-temperature annealing and copper alloy technology, applied in the field of high-temperature annealing of copper alloy parts with high zinc content, can solve the problems of rising processing costs, high equipment costs, complex equipment, etc., to ensure annealing quality, improve use efficiency, and reduce processing costs. Effect

Active Publication Date: 2013-10-16
LANZHOU FLIGHT CONTROL
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  • Abstract
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AI Technical Summary

Problems solved by technology

However, when the high-zinc brass parts with a zinc content of more than 15% are annealed at high temperature in a vacuum furnace, the alloy elements of the copper alloy parts are easy to precipitate under high vacuum, which makes the surface of the part discolored, and it is difficult to ensure the annealing quality. Only steam atmosphere protection can be used. Annealing to protect the surface of the part from oxidation and discoloration
The disadvantages of steam atmosphere protective annealing are: steam source is required, which leads to complex equipment and high equipment cost. For precision parts processed in small batches, the processing cost increases

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] 01# bushing; material: brass H62, zinc content is 37% to 40%.

[0015] After the parts are cleaned and dried, put them into the box and cover them with alumina powder baked at 700°C to cover the thickness of the covering layer not less than 10mm, and then cover them with asbestos boards. Put them into a VHS-30 vacuum furnace and heat them to 650°C After two hours of heat preservation, the furnace is cooled to below 150°C and released

[0016] 02# Limiting plate: Material: lead brass HPb59-1, zinc content is 40% ~ 43%.

[0017] After the parts are cleaned and dried, put them into the box and cover them with alumina powder baked at 700°C to cover the thickness of the covering layer not less than 10 mm, and then cover them with asbestos boards. Put them into a VHS-30 vacuum furnace and heat them to 620°C After two hours of heat preservation, the furnace is cooled to below 150°C and released

[0018] 03# bracket material; brass H70, zinc content is 29% to 32%.

[0019] A...

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Abstract

The invention belongs to heat treatment technologies of copper alloy, and relates to a high temperature annealing method of copper alloy parts. The annealing method comprises the steps as follows: alumina powder is prepared, the copper alloy parts are encased; and vacuum annealing is conducted. The invention provides the method for conducting high temperature annealing on the copper alloy parts by adopting a vacuum furnace, so that the difficult problem of precipitation of alloying elements of the copper alloy parts at a high vacuum degree is solved, the annealing quality is guaranteed, the use efficiency of the vacuum furnace is increased, and the production cost is reduced.

Description

technical field [0001] The invention belongs to copper alloy heat treatment technology, and relates to a high-temperature annealing method for copper alloy parts with high zinc content. Background technique [0002] At present, copper alloy parts with a zinc content of less than 15% can be treated with low vacuum inert gas protection vacuum annealing. However, when the high-zinc brass parts with a zinc content of more than 15% are annealed at high temperature in a vacuum furnace, the alloy elements of the copper alloy parts are easy to precipitate under high vacuum, which makes the surface of the part discolored, and it is difficult to ensure the annealing quality. Only steam atmosphere protection can be used. Annealing to protect the surface of the part from oxidation and discoloration. The disadvantages of steam atmosphere protective annealing are: steam source is required, which leads to complex equipment and high equipment cost. For precision parts processed in small ba...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22F1/08C22F1/02
Inventor 何金宝王松海周荣玲陈军董建华
Owner LANZHOU FLIGHT CONTROL
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