Preparation method of high-temperature-resistant oxidation-resistant nickel-based alloy spring wire

Abstract

The invention provides a preparation method of a high-temperature-resistant oxidation-resistant nickel-based alloy spring wire, and belongs to the technical field of alloys. The method comprises the steps that firstly, an alloy blank is chemically descaled, dried and coated with a lubricating coating, a pre-machined alloy blank is obtained, then the pre-machined alloy blank is subjected to cold drawing through a plurality of fixing dies, a spring wire blank is obtained, in the cold drawing process, the spring wire blank passing through the fixing dies is kept in a closed or semi-closed space, and the surface temperature gradient is reduced. On one hand, the spring wire blank is prevented from being directly exposed in the air after passing through the fixing dies, the high-temperature spring wire blank is prevented from being in contact with the air to be oxidized, and the surface smoothness of the spring wire is prevented from being affected. On the other hand, the conditions that the high-temperature spring wire blank is in direct contact with air for heat exchange, so that the surface temperature of the spring wire is suddenly reduced, the surface hardness and the center hardness of the spring wire blank are greatly different, and the tensile property is reduced are prevented.

Description

technical field [0001] The invention relates to the field of alloy technology, in particular to a method for preparing a high-temperature-resistant and anti-oxidation nickel-based alloy spring wire. Background technique [0002] Nickel-based alloys are widely used in aerospace, nuclear energy and petrochemical fields because of their high strength and certain oxidation and corrosion resistance at high temperatures of 650 ° C to 1000 ° C. One of their main uses is as Compression springs for device components and associated component springs. In the process of making nickel-based alloy wires into springs, cold coil processing is required. In order to meet the processing and use requirements of springs, strict requirements are put forward for the grain size, mechanical properties and surface quality of alloy wires. [0003] The traditional alloy wire preparation mostly adopts the process of multi-pass fixed die drawing or roller die drawing. When using a fixed die for drawi...

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Problems solved by technology

[0004] Based on this, it is necessary to address the process of producing nickel-based alloy spring wire in the prior art. After the alloy wire blank passes through the wire drawing die, the temperature rises sharply and then cools down sharply, resulting in a large difference between the surface hardness and the central hardness of the wire. To solve the technical problems that are difficult to carry out and easy to break, provide a method for preparing high temperature resistant and oxidation resistant nickel-based alloy spring wire with simple process, smooth alloy wire drawing process and low alloy wire broken rate

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