Manufacturing process of extruded ingot containing copper-phosphorus solder

Abstract

The invention discloses a processing method of a copper phosphorus brazing filler metal extrusion ingot with stable phosphorus content. The method comprises the following steps: electrolytic copper and red phosphorus are weighed in proportion, and are put in a crucible with a lid; air in the crucible is exhausted, and the crucible is sealed; the crucible is heated, so that the red phosphorus and the electrolytic copper in the crucible are gradually baked to a liquid state; inert gas is filled while heating, so that the gasified red phosphorus is absorbed by solution to obtain copper phosphorus liquid; the copper phosphorus liquid is evenly stirred to remove dross on the liquid surface; the copper phosphorous liquid is poured in to a heat preserving furnace for continuous casting to obtain a continuous casting ingot; the continuous casting ingot is cut into short ingots after the surface treatment, and is extruded and drawn to obtain a finished product. The method has no need to use a copper phosphorus intermediate alloy in the production of the extrusion ingot, but directly adds a phosphorus copper mixture in a graphite crucible for heating; the phosphorus content of the produced brazing filter metal is stable; and the production period is short.

Description

technical field [0001] The invention relates to a manufacturing process of an extruded ingot, more specifically, it relates to a manufacturing process of an extruded ingot containing copper-phosphorous solder. Background technique [0002] Extruded ingots of solder are commonly used to manufacture different types of solder products. The processing technology of the extruded ingot of the existing copper-phosphorous solder, its steps are similar to the method disclosed in the invention patent (invention title is "a patent of high plasticity copper-phosphorus solder and its preparation method" with the application number 200410044078.X) , that is, the electrolytic copper and the copper-phosphorus alloy accounting for 1 / 3 of the total amount are first placed in the furnace upright, the temperature is raised to 600-800°C, and then the temperature is accelerated, and the covering agent is added. After the electrolytic copper and the copper-phosphorus alloy are completely melted, s...

AI Technical Summary

Problems solved by technology

The disadvantage of this technical solution is that the phosphorus content in the extruded ingot produced by this process is determined by controlling the composition ratio of copper-phosphorus alloy, so the preliminary step of "smelting copper-phosphorus alloy" will be added, Invisibly increase the manufacturing cost

[0003] With the development of technology, some companies try to directly heat and smelt copper and phosphorus in the production of solder to replace the step of "smelting copper-phosphorus alloy" in the existing process, but such technical attempts have not achieved the expected results. The reason is: but there are also defects in this production process. Since the melting point of copper is 1083°C, the melting point of phosphorus is 44°C, and the boiling point is 280°C, so the temperature continues to rise during the smelting process. When the temperature exceeds 280°C, phosphorus will gasify , volatilize, and dissipate in the air; at this time, the electrolytic copper has not yet melted, resulting in the phosphorus content in the final extruded ingot product being lower than the theoretical value, which does not meet the customer's product customization requirements