A short-process preparation method of high beryllium beryllium copper alloy strip for photomultiplier tube multiplier

Abstract

The invention relates to a preparation method of a high beryllium copper alloy strip material short process for a dynode of a photomultiplier, and relates to a preparation method of the beryllium copper alloy strip. The problems that the mass fraction of beryllium in an existing beryllium copper strip is low, the porosity of a beryllium copper strip is large, the compactness of a structure is poor, macroscopic segregation is generated and production efficiency is low are solved; the method comprises the following steps that 1, semi-continuous preparation is carried out to prepare a blank; 2, extrusion is carried out; 3, rolling and acid pickling are carried out; and 4, finish rolling, annealing and winding are carried out to obtain the high beryllium copper alloy strip for the dynode of the photomultiplier. According to the method, a peak secondary electron emission coefficient of the high beryllium copper alloy strip for the dynode of the photomultiplier prepared by the method is 8.4-10.8, the tensile strength is 645.4 MPa-670.2 MPa, the yield strength ranges from 314.8 MPa-360.9 MPa, and the percentage elongation after fracture is 15%-19%; and the high beryllium copper alloy strip for the dynode of the photomultiplier can be obtained.

Description

technical field

[0001] The invention relates to a preparation method of a beryllium copper alloy strip. Background technique

[0002] Because of its excellent secondary electron emission performance, beryllium bronze alloy is an ideal raw material for the photomultiplier tube multiplier. The photomultiplier tube made of beryllium bronze alloy has a high secondary electron emission coefficient, a long service life and a high output stability. Lightweight, small, high-reliability photomultiplier tubes are important electronic components of aerospace vehicles such as manned spacecraft, satellites, and aircraft. In order to meet the secondary electron emission performance requirements of high-performance photomultiplier tubes, increasing At the same time, it is imperative to reduce the number of dynodes while reducing the number of dynodes. This puts forward higher requirements for the secondary electron emission performance of a single dynode. The commonly used C17200 with a b...