阅读说明：本技术 一种高效防腐蚀碟簧及其加工工艺 (Efficient anti-corrosion disc spring and processing technology thereof ) 是由 罗玉湘 于 2021-08-23 设计创作，主要内容包括：本发明公开了一种高效防腐蚀碟簧,碟簧由上而下包括上镀锌层、上过渡层、碟簧主体、下过渡层,下镀锌层,所述上镀锌层及下镀锌层厚度为0.2-1mm,成分为δ相(FeZn17)及ζ相(FeZn15)铁锌合金,所述上过渡层及下过渡层厚度0.1-0.5mm,主要成分为δ相(FeZn17)铁锌合金及镍铬铁合金,所述δ相(FeZn17)铁锌合金占30-60%,镍铬铁合金占40-70%,所述碟簧主体为镍铬铁合金；本发明还公开了高效防腐蚀碟簧的加工工艺。本发明公开的碟簧具有防腐蚀性能强,使用寿命长等优点,其加工工艺简单易操作,适合批量化生产。(The invention discloses a high-efficiency anti-corrosion disc spring, which comprises an upper zinc coating, an upper transition layer, a disc spring main body, a lower transition layer and a lower zinc coating from top to bottom, wherein the thicknesses of the upper zinc coating and the lower zinc coating are 0.2-1mm, the components of the upper zinc coating and the lower zinc coating are delta phase (FeZn17) and zeta phase (FeZn15) iron-zinc alloy, the thicknesses of the upper transition layer and the lower transition layer are 0.1-0.5mm, the main components of the upper zinc coating and the lower zinc coating are delta phase (FeZn17) iron-zinc alloy and nickel-chromium iron alloy, the delta phase (FeZn17) iron-zinc alloy accounts for 30-60%, the nickel-chromium iron alloy accounts for 40-70%, and the disc spring main body is nickel-chromium iron alloy; the invention also discloses a processing technology of the high-efficiency anti-corrosion disc spring. The disc spring disclosed by the invention has the advantages of strong corrosion resistance, long service life and the like, and is simple in processing technology, easy to operate and suitable for batch production.)

1. The efficient anti-corrosion disc spring is characterized by comprising an upper zinc coating (1), an upper transition layer (2), a disc spring main body (3), a lower transition layer (4) and a lower zinc coating (5) from top to bottom, wherein the thicknesses of the upper zinc coating (1) and the lower zinc coating (5) are 0.2-1mm, the compositions of the upper zinc coating (1) and the lower zinc coating (5) are delta phase (FeZn17) and zeta phase (FeZn15) iron-zinc alloy, the thicknesses of the upper transition layer (2) and the lower transition layer (4) are 0.1-0.5mm, the main compositions of the upper transition layer and the lower transition layer are delta phase (FeZn17) iron-zinc alloy and nickel-chromium-iron alloy, the delta phase (FeZn17) iron-zinc alloy accounts for 30-60%, the nickel-chromium-iron alloy accounts for 40-70%, and the disc spring main body (3) is nickel-chromium-iron alloy.

2. The efficient corrosion-resistant disc spring according to claim 1, wherein said nichrome comprises a precipitation-hardened alloy of niobium and molybdenum.

3. The disc spring with high corrosion resistance according to claim 1, wherein the upper transition layer (2) and the lower transition layer (4) contain 5-10% of aluminum, and are dissolved in iron-zinc alloy in elemental form.

4. A high-efficiency anti-corrosion disc spring processing technology according to claims 1-3, comprising the following steps,

the method comprises the following steps: stamping and forming a disc spring main body, carrying out alkaline washing and soaking, removing oil stains on the surface by adopting ultrasonic oscillation, taking out and drying;

step two: performing shot blasting treatment on the disc spring main body obtained in the step one to enable the surface to reach certain roughness, and cleaning the disc spring main body after the shot blasting treatment to remove impurities on the surface;

step three: placing the disc spring main body obtained by the second step in a groove with a nitrogen protection system, adding mixed powder of zinc powder, aluminum oxide, ammonium chloride, ammonium carbonate and basic zinc carbonate into the groove, and embedding the disc spring main body in the powder;

step four: applying certain pressure on powder in a plurality of grooves by adopting a hydraulic machine, sealing the grooves, introducing nitrogen, removing air in the grooves, heating and preserving heat for the grooves, and introducing nitrogen for rapidly cooling after a certain time;

and fifthly, removing redundant powder on the surface of the disc spring main body to obtain a finished disc spring.

5. The process for machining the efficient anti-corrosion disc spring according to claim 4, wherein in the second step, the surface roughness of the disc spring is 5-10 μm.

6. The process for processing the efficient anti-corrosion disc spring according to claim 4, wherein in the third step, the content of the zinc powder is 40-60%, the content of the aluminum powder is 10-30%, the content of the aluminum oxide is 10-20%, the content of the ammonium chloride is 5-10%, the content of the ammonium carbonate is 3-8%, and the content of the basic zinc carbonate is 5-10%.

7. The process for machining the efficient anti-corrosion disc spring as claimed in claim 4, wherein in the fourth step, the hydraulic machine applies pressure to the groove at 10-20MPa, the heating and heat preservation temperature in the groove is 400-500 ℃, and the heat preservation time is 30-60 min.

8. The process for processing the efficient anti-corrosion disc spring according to claim 4, wherein the nitrogen is introduced into the fourth step at a cooling rate of 1-10 ℃/10 min.

Technical Field

The invention belongs to the technical field of mechanical sealing, and particularly relates to a high-efficiency anti-corrosion disc spring and a processing technology thereof.

Background

The disc spring, also known as Belleville spring washer, is invented by the French people in Belleville shape, is in the shape of a conical disc, can be used singly or in series or in parallel, bears static or dynamic loads acting along the axial direction at the upper inner edge and the lower outer edge, is compressed to deform until being flattened, and takes the form of stored energy as live load. When necessary, automatically converts into additional compression load required by sealing, so as to reduce the continuous requirement of tightening in the use of gaskets and packing. When the disc spring is used, the disc spring is usually in a high-temperature, high-humidity, high-salt and corrosive environment, and the disc spring is corroded and then changes in stress, so that the disc spring is cracked or the fatigue strength of the disc spring is reduced at the stress change position, and the disc spring fails. Therefore, the disc spring is required to have excellent corrosion resistance, the disc spring needs to be subjected to post-treatment after being processed and formed except for steel with good corrosion resistance in the conventional disc spring production process, the conventional disc spring mostly adopts modes of electro-galvanizing, oiling and the like, and the protective effect is lost after a coating is scratched in the application process of the disc spring.

Disclosure of Invention

In order to solve the technical problems, the invention discloses a high-efficiency anti-corrosion disc spring and a processing technology thereof.

In order to achieve the technical purpose, the invention adopts the following technical scheme:

the disc spring comprises an upper zinc coating, an upper transition layer, a disc spring main body, a lower transition layer and a lower zinc coating from top to bottom, wherein the thicknesses of the upper zinc coating and the lower zinc coating are 0.2-1mm, the components of the upper zinc coating and the lower zinc coating are delta phase (FeZn17) and zeta phase (FeZn15) iron-zinc alloy, the thicknesses of the upper transition layer and the lower transition layer are 0.1-0.5mm, the main components of the upper transition layer and the lower transition layer are delta phase (FeZn17) iron-zinc alloy and nickel-chromium-iron alloy, the delta phase (FeZn17) iron-zinc alloy accounts for 30-60%, the nickel-chromium-iron alloy accounts for 40-70%, and the disc spring main body is nickel-chromium-iron alloy.

Further, the nickel-chromium-iron alloy contains niobium and molybdenum precipitation hardening type alloy.

Furthermore, the upper transition layer and the lower transition layer contain 5-10% of aluminum, and the aluminum is dissolved in the iron-zinc alloy in an elemental form.

The processing technology of the high-efficiency anti-corrosion disc spring comprises the following steps,

the method comprises the following steps: stamping and forming a disc spring main body, carrying out alkaline washing and soaking, removing oil stains on the surface by adopting ultrasonic oscillation, taking out and drying;

step two: performing shot blasting treatment on the disc spring main body obtained in the step one to enable the surface to reach certain roughness, and cleaning the disc spring main body after the shot blasting treatment to remove impurities on the surface;

step three: placing the disc spring main body obtained by the second step in a groove with a nitrogen protection system, adding mixed powder of zinc powder, aluminum oxide, ammonium chloride, ammonium carbonate and basic zinc carbonate into the groove, and embedding the disc spring main body in the powder;

step four: applying certain pressure on powder in a plurality of grooves by adopting a hydraulic machine, sealing the grooves, introducing nitrogen, removing air in the grooves, heating and preserving heat for the grooves, and introducing nitrogen for rapidly cooling after a certain time;

and fifthly, removing redundant powder on the surface of the disc spring main body to obtain a finished disc spring.

Furthermore, in the second step, the surface roughness of the disc spring is 5-10 μm.

Furthermore, in the third step, the content of zinc powder is 40-60%, the content of aluminum powder is 10-30%, the content of aluminum oxide is 10-20%, the content of ammonium chloride is 5-10%, the content of ammonium carbonate is 3-8%, and the content of basic zinc carbonate is 5-10%.

Further, in the fourth step, the hydraulic machine applies pressure into the groove at 10-20Mpa, the heating and heat preservation temperature in the groove is 400-500 ℃, and the heat preservation time is 30-60 min.

Further, nitrogen is introduced into the fourth step, and the cooling speed is 1-10 ℃/10 min.

The outer surface of the efficient anti-corrosion disc spring disclosed by the invention is a zinc coating, the zinc coating comprises delta-phase and zeta-phase iron-zinc alloys, the disc spring has super-strong corrosion resistance, the iron-zinc alloys penetrate into the disc spring main body from inside to outside, and the iron-zinc alloys on the zinc coating gradually transition inwards to the disc spring main body through the transition layer, so that the disc spring can be prevented from being subjected to punctiform corrosion caused by long-term use due to surface scratches in the using process, and the service life of the disc spring is greatly prolonged. In the process of processing the disc spring, firstly, the disc spring is shaped and stamped by adopting a stamping mode, then the greasy dirt on the surface of the disc spring is removed by an alkali washing soaking and ultrasonic wave mode, so that the subsequent processing is more uniform, the disc spring after the greasy dirt is removed is polished by a shot blasting mode, so that fresh nickel-chromium-iron alloy appears on the surface of the disc spring, a plurality of active point positions are formed on the surface, a condition is provided for the subsequent process that zinc powder permeates into the nickel-chromium-iron alloy, the processed disc spring is embedded into mixed powder of the zinc powder and the like, the zinc powder permeates into the nickel-chromium-iron alloy under the action of high temperature and high pressure, a delta phase iron-zinc alloy and a zeta phase iron-zinc alloy with better corrosion resistance are formed, because the aluminum atomic diameter is smaller than the zinc atomic diameter, the permeability of the zinc powder can be improved by adding the aluminum powder, the delta phase iron-zinc alloy and the zeta phase iron-zinc alloy are generated, the aluminum oxide is used as a passivator, the activity of the zinc powder and the zinc powder is reduced, and the rapid oxidation in the air is prevented, ammonium chloride, ammonium carbonate and basic zinc carbonate can generate a certain amount of gas in the nitrogen protection heating process, so that the zinc powder can be further promoted to permeate, and more iron-zinc alloy can be formed. And nitrogen is used as a protector under the action of high temperature and high pressure, so that the reaction of zinc powder and aluminum powder with oxygen in the air is prevented.

Drawings

FIG. 1 is a schematic structural diagram of a high-efficiency anti-corrosion disc spring according to the present invention;

fig. 2 is a sectional view of the high-efficiency anti-corrosion disc spring of the invention.

Wherein, 1-an upper zinc coating, 2-an upper transition layer, 3-a disc spring main body, 4-a lower transition layer and 5-a lower zinc coating.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, unless otherwise specified and limited, it is to be understood that the terms "mounted," "connected," and "connected" are used broadly and can be, for example, mechanically or electrically connected, or can be internal to two elements, directly connected, or indirectly connected through an intermediate medium. The specific meaning of the above terms can be understood by those of ordinary skill in the art as appropriate.

Example 1

As shown in fig. 1-2, the disc spring comprises an upper zinc coating layer 1, an upper transition layer 2, a disc spring body 3, a lower transition layer 4 and a lower zinc coating layer 5 from top to bottom, wherein the upper zinc coating layer 1 and the lower zinc coating layer 5 are 0.2-1mm thick and comprise delta phase (FeZn17) and zeta phase (FeZn15) iron-zinc alloy, the upper transition layer 2 and the lower transition layer 4 are 0.1mm thick, the main components comprise delta phase (FeZn17) iron-zinc alloy and nickel-chromium-iron alloy, the delta phase (FeZn17) iron-zinc alloy accounts for 30%, the nickel-chromium-iron alloy accounts for 70%, and the disc spring body 3 is nickel-chromium-iron alloy; the nickel-chromium-iron alloy is a precipitation hardening alloy containing niobium and molybdenum; the upper transition layer 2 and the lower transition layer 4 contain 5% of aluminum, and the aluminum is dissolved in the iron-zinc alloy in an elemental form.

The processing technology of the high-efficiency anti-corrosion disc spring comprises the following steps:

the method comprises the following steps: stamping and forming a disc spring main body, carrying out alkaline washing and soaking, removing oil stains on the surface by adopting ultrasonic oscillation, taking out and drying;

step two: performing shot blasting treatment on the disc spring main body obtained in the step one to enable the surface to reach certain roughness, and cleaning the disc spring main body after the shot blasting treatment to remove impurities on the surface, wherein the surface roughness of the disc spring is 5 microns;

step three: placing the disc spring main body obtained by the second step in a groove with a nitrogen protection system, adding mixed powder of zinc powder, aluminum oxide, ammonium chloride, ammonium carbonate and basic zinc carbonate into the groove, and embedding the disc spring main body in the powder, wherein the zinc powder content is 40%, the aluminum powder content is 30%, the aluminum oxide content is 15%, the ammonium chloride content is 7%, the ammonium carbonate content is 3%, and the basic zinc carbonate content is 5%;

step four: applying certain pressure on the powder in the multiple grooves of the hydraulic machine, sealing the grooves, introducing nitrogen, and cooling at the speed of 1 ℃/10 min; removing air in the groove, heating and preserving heat for the groove, introducing nitrogen gas for rapid cooling after a certain time, wherein the pressure applied to the groove by a hydraulic machine is 10Mpa, the heating and preserving heat temperature in the groove is 400 ℃, and the preserving heat time is 30 min;

and fifthly, removing redundant powder on the surface of the disc spring main body to obtain a finished disc spring.

Example 2

As shown in fig. 1-2, the disc spring comprises an upper zinc coating layer 1, an upper transition layer 2, a disc spring body 3, a lower transition layer 4 and a lower zinc coating layer 5 from top to bottom, wherein the upper zinc coating layer 1 and the lower zinc coating layer 5 are 0.2-1mm thick and comprise delta phase (FeZn17) and zeta phase (FeZn15) iron-zinc alloy, the upper transition layer 2 and the lower transition layer 4 are 0.1mm thick, the main components comprise delta phase (FeZn17) iron-zinc alloy and nickel-chromium-iron alloy, the delta phase (FeZn17) iron-zinc alloy accounts for 45%, the nickel-chromium-iron alloy accounts for 55%, and the disc spring body 3 is nickel-chromium-iron alloy; the nickel-chromium-iron alloy contains precipitation hardening type alloy of niobium and molybdenum; the upper transition layer 2 and the lower transition layer 4 contain 8% of aluminum, and are dissolved in the iron-zinc alloy in an elemental form.

The processing technology of the high-efficiency anti-corrosion disc spring comprises the following steps:

the method comprises the following steps: stamping and forming a disc spring main body, carrying out alkaline washing and soaking, removing oil stains on the surface by adopting ultrasonic oscillation, taking out and drying;

step two: performing shot blasting treatment on the disc spring main body obtained in the step one to enable the surface to reach certain roughness, and cleaning the disc spring main body after the shot blasting treatment to remove impurities on the surface, wherein the surface roughness of the disc spring is 8 microns;

step three: placing the disc spring main body obtained by the second step in a groove with a nitrogen protection system, adding mixed powder of zinc powder, aluminum oxide, ammonium chloride, ammonium carbonate and basic zinc carbonate into the groove, and embedding the disc spring main body in the powder, wherein the content of the zinc powder is 50%, the content of the aluminum powder is 20%, the content of the aluminum oxide is 10%, the content of the ammonium chloride is 5%, the content of the ammonium carbonate is 8%, and the content of the basic zinc carbonate is 7%;

step four: applying certain pressure on the powder in the multiple grooves of the hydraulic machine, sealing the grooves, introducing nitrogen, and cooling at the speed of 6 ℃/10 min; removing air in the groove, heating and preserving heat for the groove, introducing nitrogen gas for rapid cooling after a certain time, wherein the pressure applied to the groove by a hydraulic machine is 15Mpa, the heating and preserving heat temperature in the groove is 450 ℃, and the preserving heat time is 45 min;

and fifthly, removing redundant powder on the surface of the disc spring main body to obtain a finished disc spring.

Example 3

As shown in fig. 1-2, the disc spring comprises an upper zinc coating 1, an upper transition layer 2, a disc spring body 3, a lower transition layer 4 and a lower zinc coating 5 from top to bottom, wherein the upper zinc coating 1 and the lower zinc coating 5 are 0.2-1mm thick and comprise delta phase (FeZn17) and zeta phase (FeZn15) iron-zinc alloy, the upper transition layer 2 and the lower transition layer 4 are 0.1-0.5mm thick, the main components comprise delta phase (FeZn17) iron-zinc alloy and nickel-chromium-iron alloy, the delta phase (FeZn17) iron-zinc alloy accounts for 60%, the nickel-chromium-iron alloy accounts for 40%, and the disc spring body 3 is nickel-chromium-iron alloy; the nickel-chromium-iron alloy contains precipitation hardening type alloy of niobium and molybdenum; the upper transition layer 2 and the lower transition layer 4 contain 10% of aluminum, and are dissolved in the iron-zinc alloy in an elemental form.

The processing technology of the high-efficiency anti-corrosion disc spring comprises the following steps:

the method comprises the following steps: stamping and forming a disc spring main body, carrying out alkaline washing and soaking, removing oil stains on the surface by adopting ultrasonic oscillation, taking out and drying;

step two: performing shot blasting treatment on the disc spring main body obtained in the step one to enable the surface to reach certain roughness, and cleaning the disc spring main body after the shot blasting treatment to remove impurities on the surface, wherein the surface roughness of the disc spring is 10 microns;

step three: placing the disc spring main body obtained by the second step in a groove with a nitrogen protection system, adding mixed powder of zinc powder, aluminum oxide, ammonium chloride, ammonium carbonate and basic zinc carbonate into the groove, and embedding the disc spring main body in the powder, wherein the zinc powder content is 55%, the aluminum powder content is 10%, the aluminum oxide content is 14%, the ammonium chloride content is 10%, the ammonium carbonate content is 3%, and the basic zinc carbonate content is 8%;

step four: applying certain pressure on the powder in the multiple grooves of the hydraulic machine, sealing the grooves, introducing nitrogen, and cooling at the speed of 1-10 ℃/10 min; removing air in the groove, heating and preserving heat of the groove, and introducing nitrogen to rapidly cool after a certain time, wherein the pressure applied to the groove by the hydraulic machine is 10-20Mpa, the heating and preserving heat temperature in the groove is 400-500 ℃, and the preserving heat time is 30-60 min;

and fifthly, removing redundant powder on the surface of the disc spring main body to obtain a finished disc spring.

In the description herein, references to the description of "one embodiment," "an example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.