Production technology for improving tensile strength and grain refinement of brass material

Abstract

The invention discloses a production technology for improving tensile strength and grain refinement of a brass material. The production technology comprises the following steps that (1) the inner portion of a smelting furnace is cleaned to prevent impurities from entering the smelting furnace, the smelting furnace is preheated to 150 DEG C for 20min, brass is placed in the smelting furnace for smelting, and impurities in the smelting furnace are filtered; (4) the stirred brass liquid is cast and molded, and the brass liquid is cooled by adopting a water cooling mode during being molded so as to enable the brass liquid to be quickly cooled and molded; (5) the molded brass block is sent into a rolling mill, and the molded brass block is extruded into strips by the rolling mill; and (6) brasswhich is extruded into the strips is placed into a furnace for finished product annealing, and after annealing, secondary water cooling is carried out. The production technology has the beneficial effects that the tensile strength and elongation of the brass material produced by the production technology are obviously improved, crystal grains are greatly refined, Vickers hardness is slightly lower, the material performance is extremely stable and uniform, and the corrosion cracking probability of parts after stamping is favorably reduced.

Description

technical field [0001] The invention relates to the technical field of grain refinement, in particular to a production process for improving the tensile strength and grain refinement of brass materials. Background technique [0002] Brass is an alloy composed of copper and zinc. Brass composed of copper and zinc is called ordinary brass. If it is composed of two or more elements, it is called special brass. Brass has strong wear resistance, and brass is often used to make valves, water pipes, connecting pipes for internal and external air conditioners, and radiators. The ideal ingot structure is that the entire section of the ingot has uniform and fine equiaxed grains. This is because equiaxed grains have small anisotropy, uniform deformation during processing, excellent performance, and good plasticity, which is beneficial to casting and subsequent plastic processing. To obtain this structure, it is usually necessary to refine the melt. Any treatment that can promote nucl...

AI Technical Summary

Problems solved by technology

At present, the semi-hard state material of brass in our country is usually realized by rolling method, that is, "pre-finishing-annealing-cleaning-finishing-cleaning-finished product". The existence of materials produced by this process is inevitable. Large grain size, residual rolling stress, performance anisotropy, etc.