A kind of preparation method of beryllium copper casting roll sleeve and beryllium copper casting roll sleeve

Abstract

The invention discloses a method for preparing a beryllium-copper casting roll sleeve, comprising: step 1, preparing raw materials; step 2, melting metal copper, metal nickel and metal cobalt, and then sequentially melting copper-beryllium master alloy, silicon, metal magnesium, and metal iron Melting and casting followed by metal aluminum; Step 3, homogenizing the ingot; Step 4, adopting a direction of 45° with the axial direction of the ingot, forging the homogenized ingot and sequentially Punching, reaming, ring rolling, heat treatment and machining. The invention also discloses a beryllium copper casting roll sleeve. The invention not only ensures the strength requirements of the beryllium copper casting roll sleeve, but also improves the hardness, conductivity and grain size of the beryllium copper casting roll sleeve, and can significantly improve the service life of the beryllium copper casting roll sleeve.

Description

technical field [0001] The invention belongs to the technical field of non-ferrous metal materials, and relates to a preparation method of a beryllium copper cast roll sleeve and a beryllium copper cast roll sleeve. Background technique [0002] During the casting and rolling process, since the temperature of molten steel can reach 1400-1550°C, the roll sleeve not only has to bear the influence of harsh working conditions such as bending stress, torsional stress, surface friction force and periodic thermal shock force, but also requires the roll sleeve to have High strength, high hardness, good thermal conductivity, electrical conductivity, low linear expansion coefficient and small elastic modulus, good high temperature resistance, thermal fatigue resistance and thermal deformation resistance and other properties. [0003] The existing roll sleeves are mainly copper roll sleeves, and the main component is low beryllium alloy. The production process mainly includes alloy mel...

AI Technical Summary

Problems solved by technology

[0003] The existing roll sleeves are mainly copper roll sleeves, and the main component is low beryllium alloy. The production process mainly includes alloy melting, casting, forging, heat treatment and machining. The hardness of low beryllium alloy is low, and it is easy to cause grain boundaries during heating. Oxidation and coarse grains lead to large grain size; when the strength, hardness and grain size of the copper roller sleeve are guaranteed by increasing the beryllium content, its electrical conductivity cannot be satisfied, and the thermal conductivity of the casting roll is poor during use, which affects the casting. Surface quality of rolled products (amorphous strip)