CN-122013083-A - Stress relief annealing method for metal member winding resistance wire

CN122013083ACN 122013083 ACN122013083 ACN 122013083ACN-122013083-A

Abstract

The application discloses a stress-relief annealing method for a metal member winding resistance wire, which comprises the following steps of winding a resistance wire in a stress-relief area on the outer peripheral surface of a metal member to be treated, wrapping an insulation layer covering the resistance wire on the outer peripheral surface of the metal member to be treated, installing the metal member to be treated to a cooling container, injecting cooling medium into the cooling container, carrying out local cooling treatment on the metal member to be treated through the cooling medium, and electrifying the resistance wire to heat the metal member to be treated. The stress relief annealing method for the metal member winding resistance wire can be more efficient and accurate, is suitable for stress relief annealing treatment of various metal members such as titanium alloy members, particularly complex-shape and large-sized metal members, meets the requirements of the modern industrial field on high performance and high quality of the titanium alloy members, and further promotes industrial development.

Inventors

YAN BIN
Chen Lvbin
YANG SHENG
XIANG WUYUAN
OUYANG TAO
LI CHEN
Zou Tianpeng
ZHANG HUIJIE
WEN KAI
XIAO FEN

Assignees

湖南湘投金天先进材料创新研究院有限公司

Dates

Publication Date: 20260512
Application Date: 20260227

Claims (10)

1. The stress-relief annealing method for the metal member winding resistance wire is characterized by comprising the following steps of: winding a resistance wire around a stress relief area on the outer peripheral surface of the metal member to be treated; wrapping an insulation layer covering the resistance wire on the outer peripheral surface of the metal member to be treated; The metal component to be treated is mounted to a cooling container, cooling medium is injected into the cooling container, and the metal component to be treated is subjected to local cooling treatment through the cooling medium; and energizing the resistance wire to heat the metal member to be treated.
2. The method for stress-relief annealing of a metal member wound resistance wire according to claim 1, further comprising the step of washing an outer peripheral surface of the metal member to be treated with a solvent before winding the resistance wire; optionally, the solvent comprises alcohol.
3. The metal member wound resistance wire destressing annealing method according to claim 1, wherein the metal member wound resistance wire destressing annealing method further satisfies at least one of the following conditions: (1) The stress relief annealing method for the metal member winding resistance wire also comprises the following steps of connecting a plurality of metal positioning blocks with the same material as the metal member to be treated on the outer peripheral surface of the metal member to be treated, wherein the metal positioning blocks are used for supporting the resistance wire; (2) The metal member winding resistance wire stress relief annealing method further comprises the step of connecting a metal positioning ring which is the same as the metal member to be treated in material on the outer peripheral surface of the metal member to be treated, wherein the metal positioning ring is used for supporting the heat preservation layer.
4. The method for annealing a metal member wound resistance wire according to claim 1, further comprising the step of connecting angle irons on the outer circumferential surface of the metal member to be treated, the angle irons being made of the same material as the metal member to be treated, the angle irons being used for heating couple connection.
5. The metal member wound resistance wire destressing annealing method according to claim 1, wherein the metal member wound resistance wire destressing annealing method further satisfies at least one of the following conditions: (1) The heat-insulating layer is made of aluminum silicate fiber blanket heat-insulating cotton; (2) The thickness of the heat preservation layer is 40 mm-80 mm; (3) The heat preservation layer fully covers the outer peripheral surface of the metal member to be treated.
6. The method for stress relief annealing of a metal member winding resistance wire according to any one of claims 1 to 5, further comprising the step of binding a high temperature resistant fixing rope to an outer surface of the heat insulating layer.
7. The metal member winding resistance wire stress relief annealing method according to any one of claims 1 to 5, wherein the metal member winding resistance wire stress relief annealing method further satisfies at least one of the following conditions: (1) The number of layers of the resistance wire is 4-5 in each stress relief area on the outer peripheral surface of the metal member to be treated, and the width of a heating area formed by the resistance wire in each stress relief area is 48-60 mm; (2) The resistance wires between adjacent destressing areas on the outer peripheral surface of the metal member to be treated are isolated from each other; (3) The resistance wire comprises a ceramic resistance wire.
8. The method for stress relief annealing of a metal member wound around a resistance wire according to any one of claims 1 to 5, wherein when the resistance wire is energized to heat the metal member to be treated, comprising the steps of: Adopting a step platform type heating, wherein the heat preservation time of each heating platform is 15-40 min, and after the set heat preservation temperature is reached, the heat preservation time is 120-300 min, and then adopting a subsequent step platform type cooling, wherein the heat preservation time of each cooling platform is 15-20 min; and cutting off the power of the resistance wire, and naturally cooling to 20-30 ℃.
9. The method for stress relief annealing of metal member winding resistance wire according to any one of claims 1-5, wherein when the metal member to be treated is locally cooled by the cooling medium, the method comprises the step of controlling the bottom temperature of the metal member to be treated to be less than or equal to 200 ℃ by the cooling medium in the cooling container during the heating, heat preservation and cooling process.
10. The metal member winding resistance wire stress relief annealing method according to any one of claims 1 to 5, wherein the cooling container comprises a cooling cylinder with an opening at the top and a cushion block arranged in the cooling cylinder, the cushion block is used for supporting the metal member to be treated, an observation window and a liquid outlet are arranged on the side wall of the cooling cylinder, and a liquid outlet control valve is arranged at the liquid outlet; Optionally, a plurality of lifting lugs are arranged on the side wall of the cooling cylinder; optionally, the cooling cylinder body includes bottom plate and annular curb plate, the curb plate connect in the bottom plate.

Description

Stress relief annealing method for metal member winding resistance wire Technical Field The application relates to the technical field of metal material processing, in particular to a stress relief annealing method for a resistance wire wound on a metal member. Background In the fields of ship equipment, ocean engineering equipment and the like, metal components such as titanium alloy components, nickel alloy components and aluminum alloy components are widely applied to the manufacturing process of various key parts due to the good mechanical properties, excellent corrosion resistance and the like. However, in the manufacturing process of the metal member, whether it is machining, welding forming or other processing processes, residual stress is inevitably generated inside the metal member, and the presence of the residual stress adversely affects the performance and service life of the metal member. On the one hand, the residual stress can cause the metal component to be unstable in size in the use process, and the metal component can deform with the passage of time, so that the metal component is difficult to meet the strict requirement of precision equipment on the dimensional precision. On the other hand, the higher residual stress reduces the fatigue strength of the metal component, and under the action of alternating load, the metal component is more prone to generate fatigue cracks, so that fracture failure is caused, which is extremely unfavorable for some key metal components bearing cyclic load, and seriously threatens the safety and reliability of equipment operation. Stress relief annealing is an effective means of reducing residual stress in metal components such as titanium alloy components. The traditional stress relief annealing method is to put the whole metal component into a high temperature furnace for heating and preserving heat and then slowly cooling, and the method can reduce the residual stress to a certain extent, but has a plurality of defects, for example, in the whole heating process of the metal component with complex shape and large size, the uniform annealing effect is difficult to realize due to the non-uniformity of temperature distribution in the furnace and the difference of heat dissipation of each part of the component, so that the residual stress in a part of the region is not removed sufficiently. In addition, bulk annealing requires modification of large-scale equipment to accommodate large-sized metal components, and is high in energy consumption during heating and cooling, resulting in a significant increase in production costs. In addition, for some assembled metal components with integral structures or local areas, the conventional integral annealing method has the problems of high operation difficulty, low feasibility and the like, and the metal components are often required to be disassembled for treatment, so that the process complexity and the processing period are obviously increased. In the prior art, a part of research is attempted to treat a specific part of a metal member by adopting a local heating mode, for example, flame heating or induction heating, but the flame heating has the problems of low temperature control precision, difficult accurate control of a heating area, easy surface serious oxidation and the like, and the induction heating has higher heating speed, but the design and manufacturing difficulty of an induction coil of a metal member with a complex shape are higher, and the local overheating possibly occurs due to the eddy current effect in the heating process, so that the annealing quality cannot be ensured. Disclosure of Invention Based on this, there is a need to provide a metal member wound resistance wire stress relief annealing method that is more efficient, accurate and suitable for various types of metal members, such as titanium alloy members, particularly complex shapes and large metal members. An embodiment of the application provides a stress relief annealing method for a metal member winding resistance wire. A stress-relief annealing method for a metal member winding resistance wire comprises the following steps: Winding a resistance wire around each destressing area on the outer peripheral surface of the metal member to be treated; wrapping an insulation layer covering the resistance wire on the outer peripheral surface of the metal member to be treated; The metal component to be treated is mounted to a cooling container, cooling medium is injected into the cooling container, and the metal component to be treated is subjected to local cooling treatment through the cooling medium; and energizing the resistance wire to heat the metal member to be treated. In some embodiments, the method for annealing the metal member wound resistance wire further comprises the step of cleaning the outer peripheral surface of the metal member to be treated with a solvent prior to winding the resistance wire. In some embodiments, the solvent c