Power-on water-bath steel wire quenching heat treatment method

Abstract

The invention relates to a method for quenching heat treatment of a steel wire in a power-on water bath, which can effectively solve the problems of high cost of heat treatment of the steel wire, fire striking phenomenon between the steel wire and conductive rollers, generation of martensite when the steel wire passes through a water bath tank at low speed, and poor insulativity of equipment and a pipeline. The invention adopts a technical proposal that the steel wire is tensioned by a tensioning device, passes through an insulation protection sleeve after tensioning, is compacted by an insulated tension roller, passes through a first conductive roller, horizontally passes through a refractory heat-insulated sleeve, passes through a parallel insulated carrier roller which is on the same plane with the first conductive roller, is compacted by a second conductive roller and sprayed by a cold water pipe, enters two upper tanks which are arranged on the water bath tank and communicated with the water bath tank, passes through the two upper tanks, and is quickly cooled, and quenching of the steel wire is realized. The invention has simple equipment, scientific and advanced method, low cost and non environmental pollution, effectively solves the problems of the fire striking phenomenon between the steel wire and the conductive rollers, generation of the martensite when the steel wire passes through the water bath tank at low speed, and poor insulativity of the equipment and the pipeline, and has significant economic benefit and social benefit.

Description

1. Technical field [0001] The invention relates to heat treatment, in particular to a heat treatment method for quenching steel wire in a card electric water bath. 2. Background technology [0002] Steel wire occupies a very important position in the national economy, and steel wire quenching heat treatment is a very important process in the production process of steel wire. In particular, the production of medium and high carbon steel wire is inseparable from the heat treatment of the medium wire. [0003] There are many methods of steel wire quenching and heat treatment, and the method of quenching in hot-melt lead with muffle furnace heating has a history of one hundred years. (Such as figure 1 shown) [0004] Currently, this method still dominates the steel wire production industry. The advantage of this method is that the heating energy is large, the dv value can be very high, the output is high, the furnace body is long, the steel wire stays in the furnace for a lo...

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Problems solved by technology

[0009] In view of the above situation, in order to overcome the defects of the prior art, the object of the present invention is to provide a quenching heat treatment method for steel wire in a card electric water bath, which can effectively solve the problem of high cost of heat treatment of steel wire, sparking phenomenon between the steel wire and the conductive roller, and steel wire passing through the water at low speed. Martensite is generated in the bath, and the insulation of equipment and pipelines is poor. The technical solution is to tension the steel wire through a tension adjuster, pass through the insulating protective sleeve after tension, and then compress it with an insulating tension roller. Then pass through the first conductive roller, pass through the refractory insulation cover horizontally, pass through the parallel insulating rollers on the same plane as the first conductive roller, and then press the second conductive roller and spray it with cold water pipes, and then enter the water bath. In the two upper slots connected with the water bath, the steel wire is quenched through the two upper slots for rapid cooling, wherein the first conductive roller is placed in parallel with the second conductive roller, and the first conductive roller is higher than the second conductive roller , the steel wire passes vertically through the first conductive roller and the second conductive roller, and a heating power supply is installed between the first conductive roller and the second conductive roller to heat the steel wire, and then quickly pass through the upper tank, the water bath and the upper tank There is the same coolant, and the steel wire is rapidly cooled. The coolant is calculated by weight percentage: 97% of water and 3% of copper sulfate form the electrolyte, and then add the polymer additive acrylic acid 5% of the weight of the electrolyte to the electrolyte. %, 1% sodium nitrite, 2% sodium chloride, and 0.1% OP-07 emulsifier are stirred evenly. The insulation protection casing, cold water spray pipe and water bath inlet pipe are all made of rubber or plastic insulation materials. Made to ensure electrical insulation, the invention has simple equipment, scientific and advanced methods, low cost, no environmental pollution, and effectively solves the phenomenon of sparking between the steel wire and the conductive roller. When the steel wire passes through the water bath at a low speed, martensite is generated. The equipment and The problem of poor insulation of pipelines has huge economic and social benefits

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