Manufacturing method for high-strength extremely-fine stainless steel wire

Abstract

Disclosed is a manufacturing method for a high-strength extremely-fine stainless steel wire. The tensile strength of an existing stainless steel wire with the diameter being smaller than 30 microns is improved to 3900 Mpa, the strength of the high-strength stainless steel wire continues to be improved till the minimum diameter reaches 16 microns, and the high-strength stainless steel wire has the manufacturing advantages that when the true strain is larger than 7, the strength of the stainless steel wire can be substantially improved, and certain high stability of manufacturing efficiency and mechanical properties is maintained.

Description

technical field [0001] The invention relates to a method for manufacturing high-strength ultra-fine stainless steel wires, mainly for extending the high-strength ultra-thin stainless steel wires using Austenite stainless steel materials to make them smaller than the wires during mass production. High-strength stainless steel wire with a diameter of 30 μm (micron), and the wire diameter of this stainless steel wire can reach 16 μm (micron). Background technique [0002] Existing thin stainless steel wires will be stretched and formed to obtain the expected strength, and they will be subjected to appropriate temperature during the manufacturing process, so that the formed stainless steel wire will reach the expected wire diameter while maintaining a certain strength and toughness. The extension process of stainless steel wire is actively developed and applied by related companies, such as: Japanese Patent Laid-Open No. 2013-047367 "Manufacturing method of high-strength stainle...

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Problems solved by technology

[0010] According to these related patent disclosures, the heat treatment of the extended steel wire in the middle section is to make the stainless steel undergo low-temperature annealing in the low-temperature intermediate processing process at 550-400 °C and the shape of the terminal wire diameter to improve the strength of the stainless steel wire. The maximum true strain of wire drawing can reach 6.8, but the methods disclosed in these patents are low in manufacturing efficiency and yield. They only increase the strength of stainless steel wire, but at the same time reduce the life of the mold used for wire drawing.

[0011] In addition, the method of improving the strength of stainless steel wires by adjusting the chemical composition of stainless steel requires the addition of special raw materials so that even if the strength of these stainless steel wires is increased, the overall manufacturing cost will also increase, and this increased strength is usually still not achieved. High-strength stainless steel ultra-fine wire can be applied to the high-strength stainless steel wire requirements related to the screen printing process; that is, although the disclosed technology in the existing patent has the purpose of improving this type of stainless steel ultra-fine wire, in essence There are still many shortcomings in the manufacturing, such as: high manufacturing cost, low production efficiency, etc.

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