A kind of preparation method of environment-friendly heat-resistant high-temperature alloy steel wire

Abstract

The invention discloses a preparation method of an environment-friendly heat-resistant high-temperature alloy steel wire, which comprises the following steps: step A, laying out the heat-resistant high-temperature alloy steel wire, successively sanding and peeling, cooling and cleaning, electrolytic pickling, online coating, drawing Pulling treatment, take-up; step B, vacuum solution heat treatment, after the end, place in a low-pressure nitrogen protective atmosphere in liquid quenching oil at 40-100°C, cool rapidly, and lift the oil surface for cleaning when the temperature of the steel wire drops below 80°C The surface is oily, and the surface is cleaned and air-dried; step C, wire setting, surface treatment until the surface roughness of the steel wire is 0.8μm≤Ra≤1.5μm, ultrasonic cleaning, electrolytic pickling, online phosphating, saponification, using wire drawing powder and cones with high oil content The wire drawing die with an angle of less than 12 degrees is drawn and taken up at a slow speed of 20-50m / min, and the wire drawing die is cooled by flowing water to take up the wire. The invention does not use hydrofluoric acid and salt containing copper ions, which is safe for workers and friendly to the environment; the film-forming efficiency on the steel wire surface is higher.

Description

technical field [0001] The invention relates to steel wire surface treatment, in particular to a preparation method for an environmentally friendly heat-resistant high-temperature alloy steel wire. Background technique [0002] At present, most of the finished steel wires of heat-resistant alloys and high-temperature alloys in China still rely on imports, and localization substitution is an imperative trend. Generally, low-carbon and low-carbon alloy and high-carbon steel wires can be soaked in hydrochloric acid solution and sulfuric acid solution to remove the scale on the surface, but stainless steel, heat-resistant steel, and high-temperature alloy steel wire with high chromium and nickel elements have been solid-soluted After the heat treatment process, the oxide skin on the surface needs to be pickled with highly corrosive hydrofluoric acid. Based on environmental protection requirements, hydrofluoric acid pickling is not used, so the mechanical descaling method is use...

AI Technical Summary

Problems solved by technology

During this period, the transfer time will basically exceed 30 seconds, which is very bad for the quality uniformity of the steel wire

Then the solid-solution steel wire is dipped in hydrofluoric acid, pickled to remove the surface scale, and made into electroplated copper film or oxalic acid film according to the needs of subsequent cold heading enterprises. It is obvious that these two film processes pose a challenge to the current environmental protection label. , the environmental protection regulations in some areas clearly prohibit copper electroplating and unorganized discharge of oxalic acid bath

Moreover, the cold heading fastener factory still needs to use a series of chemicals to dissolve and separate the copper coating on the surface during the production process of the steel wire film of this method, otherwise a small amount of copper elements will infiltrate the surface of the parts during heat treatment, resulting in poor quality. Stability, this process will also cause a large environmental burden and human waste on the cold heading process

[0004] To sum up, the disadvantages of traditional heat-resistant superalloy production methods mainly include: HF (hydrofluoric acid) pollution discharge, high COD (chemical oxygen demand) oxalic acid waste liquid discharge, copper ion waste liquid discharge, etc.

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