A production process of copper alloy valve forging

Abstract

The invention provides a copper alloy valve forging production processing technique, and belongs to the technical field of heat treatment. The copper alloy valve forging production processing technique solves the problems of great energy consumption and environmental pollution in the existing copper alloy valve production processing. The copper alloy valve forging production processing technique includes the following steps: a, saw cutting and material discharging; b, billet heating; c, hot forging and red dashed; d, annealing; e, heat insulation; f, cooling as with the furnace; g, discharging from the furnace. Copper alloy bars are made to valve forging product through the technique of hot forging and red dashed after being cut and heated, the red dashed process needs only once stamping, so the technique is rather simple; thickness of work piece rough selvedges which are made from red dashed moulds is relatively small, so material utilization rate is much higher; red dashed valve forging production is annealed in a vacuum heat treatment furnace and is protected through ventilating inert gases, so that surface oxidation of the valve forging production can be avoided, later shot blasting, sand blasting, acid picking and other surface processing procedures can be simplified or omitted. The copper alloy valve forging production processing technique is low in energy consumption and more environmentally friendly.

Description

technical field [0001] The invention belongs to the technical field of heat treatment, and relates to a copper alloy heat treatment, in particular to a production process of a copper alloy valve forging. Background technique [0002] In the manufacturing industry along the coast of Zhejiang, especially in the pipeline hardware production industry, copper alloy valves are usually processed by red punching process. Red punching process is one of the effective methods to improve the mechanical properties of parts by changing the processing method. It is like fine In the forging process, the metal blank is heated and formed in the mold, but the red punch is generally formed in one time except for the large red punch, while the precision forging is generally formed by several times of pressure. Compared with the hot extrusion process, the metal billet also needs to be heated. The hot extrusion die is basically the same as the cold extrusion die. The flow of metal materials in the...

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Problems solved by technology

[0005] Moreover, after the copper alloy valve has been formed, heat treatment is required. There are two ways of heat treatment: recrystallization annealing and low temperature stress relief annealing. The above two annealing processes are carried out in an open environment, and a large amount of heat energy is wasted. in the air

Moreover, in the above-mentioned annealing process, scales are prone to appear on the surface of the copper alloy, and it is necessary to adopt methods such as shot blasting, sandblasting and pickling to remove the scales on the surface, but the above-mentioned methods for removing scales all have obvious defects, such as shot blasting and Sand blasting consumes a lot of energy, is not energy-saving and has high cost, while the pickling process is likely to cause serious pollution to the environment

If environmental protection projects are launched, the cost of manufacturing enterprises will be very high

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