A production process of low-carbon gas-shielded welding wire

Abstract

Disclosed is a novel process for producing a low carbon gas shielded welding wire. The novel process for producing the low carbon gas shielded welding wire includes following steps of (1) raw material selection, (2) surface treatment processes, (3) drawing process and (4) copper plating process, wherein the step (1) includes that as for steel wire rod composition, C is equal to 0.06-0.010%, Si is equal to 0.80-1.00%, Mn is equal to 1.40-1.60%, P or S is smaller than or equal to 0.020%, and Ca is smaller than or equal to 0.0015%; the step (2) includes an acid pickling process and a phosphating process, as for the acid pickling process, pickling solution proportion includes that prewash hydrochloric acid concentration is 5-10%, hydrochloric acid concentration for substrate washing is 15-20% and FeC12 is smaller than or equal to 300g / l, acid pickling time is 10-25minutes, washing is performed by high pressure water instantly after acid pickling, and as for the phosphating process, phosphating solution proportion includes that Ta total acidity is 50-110pt and Fa free acidity is 5-20pt, phosphating temperature is 70-80DEG C and phosphating time is 1-3 minutes. By means of the novel process for producing the low carbon gas shielded welding wire, a chemical adsorption film is formed on the surface of a steel wire rod, a thin phosphating film is formed on the surface of the steel wire rod by mid-temperature phosphating process and short phosphating time, adsorption of surface lubricating agents is more uniform and compact, the steel wire rod is directly drawn to form a finished product wire in an unannealed state after surface treatment, costs are reduced by 50-80 yuan / ton compared with those of common processes, the wire breaking rate is decreased by 70%, and the producing efficiency is increased by 40%.

Description

technical field

[0001] The invention belongs to the technical field of gas-shielded welding wire production technology, and in particular relates to a low-carbon gas-shielded welding wire production technology. Background technique

[0002] During the production of gas shielded welding wire, the surface treatment of raw materials (wire rod) is a very important process, and its quality will directly affect the quality, output and production cost of the finished welding wire. The commonly used wire rod surface treatment methods include mechanical peeling, on-line pickling, off-line pickling, etc., and then the surface is sprayed with borax and drawn or directly drawn, but the wire rod after the above methods has incomplete removal of iron scale and lubrication. Problems such as uneven carrier attachment cannot meet the requirements of high-speed drawing, especially when producing welding wires with specifications of φ0.8mm and below, the broken wire rate increases significantl...

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