Method for processing Beryllium copper plate strip for secondary electronic emission

Abstract

The invention provides a method for processing beryllium copper plate strips for secondary electronic emission. The composition proportion of the sheet material comprises: by weight, 2.7-3.0 % of beryllium, 0.31% or less than 0.31% of nickel, 0.058% or less than 0.058% of ferrum, 0.013% or less than 0.013% of aluminum, 0.028 % or less than 0.028 % of silicon, 0.0020 % or less than 0.0020 % of plumbum, 0.0020 % or less than 0.0020 % of cadmium, 0.0020 % or less than 0.0020 % of zinc, and 0.43 % or less than 0.43 % of the sum of other impurity elements, and the balance copper. The particular rolling technology includes the steps: using methods of plasticization and extrusion to manufacture blanks; heating the blanks and preserving heat; matching with the middle annealing technology and acid-washing, conducting multi-pass rolling on a rolling machine; and after rolling is conducted, conducting corresponding heat treatment to obtain the sheet materials with corresponding standards. A secondary electronic emission peak value of beryllium copper plate and strip emitting can reach more than 10 which is far more than a level of a peak value which is 6.

Description

technical field [0001] The invention proposes a method for processing a beryllium-copper alloy strip for secondary electron emission, which belongs to the field of material processing method protection. technical background [0002] Beryllium bronze alloy is a wrought and castable alloy, which belongs to the copper-based alloy strengthened by aging precipitation. After quenching and aging treatment, it has high strength, hardness, elastic limit, and good stability. It has corrosion resistance, wear resistance, and It has a series of advantages such as fatigue, low temperature resistance, non-magnetic, good electrical and thermal conductivity, and no sparks when impacted. It is known as the "king of colored elastic materials". Beryllium bronze alloy has good secondary electron emission performance and is widely used in various fields such as electronic appliances, communication instruments, aerospace, petrochemical, metallurgical mines, automobile household appliances, machin...

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Problems solved by technology

[0003] Beryllium bronze alloy, after treatment, forms a thin layer of beryllium oxide on the surface, which is the main layer of secondary electron emitter, so the content of beryllium and impurity elements in beryllium bronze alloy determines the secondary electron emission performance of beryllium copper alloy At present, the beryllium copper alloy on the market mainly contains 1.5wt.%~2.0wt.%, and the content of impurity elements is high, but the accuracy of beryllium copper alloy based on electron emission requires high secondary electron emission performance of the alloy, and the error Small, but commercially available common materials cannot meet its requirements. A beryllium bronze material with high beryllium content and low impurity content is required. The main requirements of this material are: the beryllium content is 2.7%~3.0wt.%, and the impurity content is controlled at Below 0.1wt.%, the composition of the strip alloy is uniform

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