Large diameter copper casting steel wire continuous hot-dipping tin preparation method

A large-diameter, cast copper technology, applied in hot-dip plating process, connection contact material, cable/conductor manufacturing, etc., can solve the problems of high connection welding cost, expensive copper material, electrochemical corrosion, etc., to reduce electricity Chemical corrosion, long service life, good effect of atmospheric corrosion

Active Publication Date: 2008-02-20
江苏金合益复合新材料有限公司
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Problems solved by technology

Pure copper is usually used as the grounding wire in foreign countries, but because copper is more expensive and the electrode potential of copper is higher than that of steel, it is easy to cause electrochemical corrosion to other active underground metal pipes, and the connection and welding cost is relatively high, so i

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Embodiment Construction

[0018] The preparation method of large-diameter cast copper steel wire continuous hot-dipping tin, the specific steps are as follows:

[0019] (1) Rough drawing: The high-quality low-carbon steel wire with a diameter of φ14 is first removed from the oxide layer (commonly known as peeling) process, and then drawn into a coil wire with a diameter of φ13.00 by a large drawing machine, and the coil length is not less than 300m / dish.

[0020] (2) Copper casting: After online straightening, pickling, alkali neutralization and cleaning, the φ13 round wire enters the heating furnace (nitrogen protection) for drying and heating to 350°C-400°C, and then enters the power frequency copper casting furnace , The molten copper at 1200°C is crystallized in a graphite mold crystallizer with a fixed core steel core, and is continuously cast into a copper-clad steel disc round blank with an outer diameter of φ15.50mm.

[0021] (3) Fine drawing: the above-mentioned copper-clad steel disc round b...

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Abstract

The utility model relates to a preparation method for continuous hot dip tin using big diameter copper casting steel wire, which is mainly characterized in the following procedures. (1) Thick drawing: the high quality low carbon steel wire rod is drawn into coiled wire rod using a wire drawing machine; (2) Copper casting: the coiled wire rod is dried and heated in the heating furnace and then casts into a copper clad steel coiled wire rod roughcast in the power frequency copper casting furnace; (3) Thin drawing: the copper clad steel coiled wire rod roughcast is drawn into single strand copper casting steel wire by the wire drawing machine; (4) Heat treatment: the coiled wire rod is loaded to be heated in the vacuum annealing oven to get a single strand long length soft copper casting steel core wire; (5) Hot dip tin: dip the copper casting steel core wire which has been marinated in the zinc chloride solution into the tin liquid subsequently to get a single strand big diameter grounding steel wire. The hot dip tin copper casting grounding steel wire prolongs the service life compared with the prior copper casting steel core ground line because the dip tin copper casting grounding steel wire prolongs the complete corruption time of tin.

Description

Technical field: [0001] The invention relates to the technical field of grounding wires composed of three metals including tin, copper and steel, in particular to a method for preparing large-diameter cast copper steel wires by continuous hot-dipping tin. Background technique: [0002] At present, hot-dip galvanized steel is usually used as the grounding wire in our country. Because the zinc layer of hot-dip galvanized steel is thinner and the zinc is more active, the corrosion resistance period in coastal chemical enterprises is relatively short. Pure copper is usually used as the grounding wire in foreign countries, but because copper is more expensive and the electrode potential of copper is higher than that of steel, it is easy to cause electrochemical corrosion to other active underground metal pipes, and the connection and welding cost is relatively high, so it has not been obtained in my country. Promotional use. [0003] In recent years, copper-clad steel grounding w...

Claims

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Application Information

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IPC IPC(8): H01B13/00H01B5/00B21C1/00C23C2/06C23C2/38H01R4/66
Inventor 孙永春
Owner 江苏金合益复合新材料有限公司
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