阅读说明：本技术 精锻脱模剂及其制备方法 (Precision forging release agent and preparation method thereof ) 是由 丁文涛 丁晓慧 丁凯云 于 2019-08-09 设计创作，主要内容包括：本发明公开了一种精锻脱模剂及其制备方法,其技术方案要点是一种精锻脱模剂,包括如下组分：润滑剂、分散剂、极压脱氧剂、稳定剂、碱性调节剂、络合剂以及水；所述润滑剂包含重量比为10:(1-1.1)的石墨以及无定形二氧化硅粉；所述分散剂包含重量比为1:1.5:5的聚丙烯酸钠、亚甲基双萘磺酸钠以及羧甲基纤维素钠。本发明通过润滑剂、分散剂以及极压脱氧剂的配合,使制得的脱模剂具有很好的脱模效果,并且通过极压脱氧剂的作用,在模具对金属坯件加工时,极压脱氧剂可以在金属坯件之前先与氧气反应,从而减少金属坯件表面氧化皮的生成,降低模具的磨损,延长模具的使用寿命。(The invention discloses a precision forging release agent and a preparation method thereof, and the key point of the technical scheme is that the precision forging release agent comprises the following components: lubricant, dispersant, extreme pressure deoxidizer, stabilizer, alkaline regulator, complexing agent and water; the lubricant comprises graphite and amorphous silica powder in a weight ratio of 10 (1-1.1); the dispersing agent comprises sodium polyacrylate, sodium methylene dinaphthalene sulfonate and sodium carboxymethyl cellulose in a weight ratio of 1:1.5: 5. The invention ensures that the prepared release agent has good demoulding effect through the matching of the lubricant, the dispersant and the extreme pressure deoxidizer, and the extreme pressure deoxidizer can react with oxygen before a metal blank is processed by a mould under the action of the extreme pressure deoxidizer, thereby reducing the generation of oxide skin on the surface of the metal blank, reducing the abrasion of the mould and prolonging the service life of the mould.)

1. A precision forging mold release agent is characterized in that: the paint comprises the following components in parts by weight:

1100-1198.8 parts of lubricant, 67.5-82.5 parts of dispersant, 12-18 parts of extreme pressure deoxidizer, 8-12 parts of stabilizer, 29.4-40.6 parts of alkaline regulator, 8-12 parts of complexing agent and 3600 parts of water;

the lubricant comprises graphite and amorphous silica powder in a weight ratio of 10 (1-1.1);

the dispersing agent comprises sodium polyacrylate, sodium methylene dinaphthalene sulfonate and sodium carboxymethyl cellulose in a weight ratio of 1:1.5: 5.

2. The finish forging mold release agent according to claim 1, characterized in that: the complexing agent is formed by mixing amino carboxylate complexing agent and alcamines complexing agent in a weight ratio of 1:1.

3. The finish forging mold release agent according to claim 2, characterized in that: the amino carboxylate complexing agent is trisodium nitrilotriacetate.

4. The finish forging mold release agent according to claim 2, characterized in that: the alcohol amine complexing agent is one or the combination of monoethanolamine and diethanolamine.

5. The finish forging mold release agent according to claim 1, characterized in that: the extreme pressure deoxidizer is one or the compound of silicon carbide, silicon nitride and boron nitride.

6. The finish-forging mold release agent according to claim 5, characterized in that: the extreme pressure deoxidizer is boron nitride, the precision forging release agent further comprises an activating agent, and the activating agent is one or a composite of potassium fluoborate, sodium fluoaluminate, calcium fluoride and magnesium chloride.

7. The finish-forging mold release agent according to claim 6, characterized in that: the weight ratio of the boron nitride to the activator is (1-2.5): 1.

8. The finish forging mold release agent according to claim 1, characterized in that: the alkaline regulator is formed by mixing sodium carbonate and sodium hydroxide according to the weight ratio of 1: 13; the stabilizer is sodium acetate.

9. The finish forging mold release agent according to claim 1, characterized in that: the graphite is one of crystalline flake graphite, earthy graphite and artificial graphite.

10. A preparation method of a precision forging release agent is characterized by comprising the following steps: the method comprises the following steps of:

s1: taking 615 parts of 600-13-part water, adding 100-118.8 parts of amorphous silica powder, 8-12 parts of stabilizing agent, 12-18 parts of extreme pressure deoxidizer, 13.5-16.5 parts of methylene dinaphthalene sodium sulfonate, 9-11 parts of sodium polyacrylate and 29.4-40.6 parts of alkaline regulator, and uniformly stirring to obtain a first suspension;

s2: taking 3000-3085 parts of water, adding 45-55 parts of sodium carboxymethylcellulose, 1000-1080 parts of graphite and 8-12 parts of complexing agent, and uniformly stirring to obtain a second suspension;

s3: and adding the second suspension into the first suspension, and uniformly stirring to obtain the precision forging release agent.

Technical Field

The invention relates to the technical field of release agents, in particular to a precision forging release agent and a preparation method thereof.

Background

Forging is a processing method which utilizes forging machinery to apply pressure on a metal blank to cause the metal blank to generate plastic deformation so as to obtain a forged piece with certain mechanical property, certain shape and certain size; according to the forging temperature, the forging method can be divided into hot forging, warm forging and cold forging, wherein the hot forging refers to metal forging higher than 800 ℃; when a blank is forged, the metal blank needs to be placed in a die, and when hot die forging is carried out, the forging temperature is higher than 800 ℃, and at the temperature, the metal blank is easy to adhere to the die, so that the metal blank is difficult to take out of the die; to solve this problem, a layer of lubricant release agent is usually sprayed on the inside of the mold.

The graphite release agent is widely used because of its high temperature resistance and high lubricity. The water-based graphite mold release agent generally comprises a base material, a dispersing agent and water; the base materials are generally oil, grease, wax, polymer, silicone and the like, and can play a role in demoulding and lubricating; the dispersant is used for uniformly dispersing the base material in a continuous water phase in a superfine particle manner to form a stable suspension; water acts as a dispersant as well as a carrier for the base material. In the prior art, a patent application publication No. CN107952932A discloses a graphite release agent and a preparation method thereof, and the graphite release agent comprises microcrystalline graphite, kaolin, quartz sand, sodium acetate, and sodium carboxymethylcellulose.

Although the graphite release agent can release a metal blank, the conventional graphite release agent mainly utilizes the lubricating effect of the graphite release agent to realize the release, and when the mold is continuously used at high frequency, the mold is still easy to damage, so that the service life of the mold is short, and therefore, the problem to be solved is how to improve the release effect of the release agent and prolong the service life of the mold.

Disclosure of Invention

An object of the present invention is to provide a finish forging release agent which has a good release effect by the combination of a lubricant, a dispersant and an extreme pressure deoxidizer, and which can reduce the formation of scale on the surface of a metal blank, reduce the wear of a die, and prolong the service life of the die by the action of the extreme pressure deoxidizer which can react with oxygen before the metal blank is machined by the die.

The technical purpose of the invention is realized by the following technical scheme:

the precision forging release agent comprises the following components in parts by weight: 1100-1198.8 parts of lubricant, 67.5-82.5 parts of dispersant, 12-18 parts of extreme pressure deoxidizer, 8-12 parts of stabilizer, 29.4-40.6 parts of alkaline regulator, 8-12 parts of complexing agent and 3600 parts of water; the lubricant comprises graphite and amorphous silica powder in a weight ratio of 10 (1-1.1); the dispersing agent comprises sodium polyacrylate, sodium methylene dinaphthalene sulfonate and sodium carboxymethyl cellulose in a weight ratio of 1:1.5: 5.

By adopting the technical scheme, the graphite and the amorphous silica powder are used as the base materials of the graphite release agent, so that the graphite release agent has good high temperature resistance, wear resistance and lubricating effect; when the amorphous silicon dioxide powder is used together with a dispersing agent, an extreme pressure deoxidizer and a complexing agent, the dispersibility and the suspension property of graphite can be improved, so that a formed release agent can be uniformly attached to the surface of a mold, the wear resistance, the high temperature resistance and the lubricity of the mold are improved, the wear between a metal blank and the mold is reduced, and the processed metal blank is easier to take out of the mold; the alkaline regulator makes the whole system alkaline, the viscosity of the sodium polyacrylate in the dispersant is increased in an alkaline medium, the adhesive force of the lubricant to the die can be improved, and a uniform lubricating film can be formed in the inner cavity of the die; under the action of the extreme pressure deoxidizer, when the die punches the metal blank, the extreme pressure deoxidizer can react with oxygen before the metal blank, so that the generation of oxide scale on the surface of the metal blank is reduced, the abrasion of the die is reduced, and the service life of the die is prolonged.

Further, the complexing agent is formed by mixing an amino carboxylate complexing agent and an alcamines complexing agent in a weight ratio of 1:1.

By adopting the technical scheme, the amino carboxylate complexing agent has strong complexing ability, but poor dispersibility, high stability constant and certain alkali resistance; the alcamines complexing agent has poor complexing ability and is relatively stable in an alkaline environment, and is used as a complexing auxiliary agent of the amino carboxylate complexing agent; by compounding the amino carboxylate complexing agent and the alcamines complexing agent, the scale inhibitor has good scale inhibition effect, can keep the mold clean, and reduces the generation of dirt; when the complexing agent is matched with the dispersing agent and the extreme pressure deoxidizer, the graphite can be uniformly dispersed, and the stability of the release agent is improved.

Further, the aminocarboxylate complexing agent is trisodium nitrilotriacetate.

By adopting the technical scheme, the aminocarboxylate complexing agent mainly comprises nitrilotriacetic acid trisodium, ethylenediamine tetraacetate and diethylenetriamine pentacarboxylate, but the ethylenediamine tetraacetate and the diethylenetriamine pentacarboxylate are not easily biodegradable, so the nitrilotriacetic acid trisodium which is more environment-friendly is selected; the trisodium nitrilotriacetate is more suitable for alkaline media, has very strong complexing ability, can form a complex with various metal ions, improves the suspension property of graphite in a release agent, and improves the stability of the product; in addition, the trisodium nitrilotriacetate has a certain antibacterial effect, so that the storage life of the release agent can be improved, and the stability of the product quality can be further improved.

Further, the alcohol amine complexing agent is one of monoethanolamine and diethanolamine or a composite of the monoethanolamine and the diethanolamine.

By adopting the technical scheme, the alcohol amine complexing agent mainly comprises monoethanolamine, diethanolamine and triethanolamine, and because the triethanolamine has larger corrosivity to copper, aluminum and alloy thereof, the application range of the triethanolamine used as the release agent is smaller, the monoethanolamine and the diethanolamine which are suitable for alkaline media, have small corrosivity to metals and have wider application range are selected; the monoethanolamine and the diethanolamine have a certain anticorrosion and antibacterial effect besides the gain effect on the amino carboxylate complexing agent, and the retention period of the release agent and the stability of other generation quality can be improved by matching the monoethanolamine and the diethanolamine with the amino carboxylate complexing agent.

Further, the extreme pressure deoxidizer is one of silicon carbide, silicon nitride and boron nitride or a composite of the silicon carbide, the silicon nitride and the boron nitride.

By adopting the technical scheme, the silicon carbide, the silicon nitride and the boron nitride all belong to inorganic materials with excellent hard, heat-resistant and wear-resistant properties, and the high-temperature resistance of the release agent can be improved; the silicon nitride and the boron nitride also have lubricating property, so that the lubricating property of the release agent can be improved, and the release effect is improved; and the extreme pressure deoxidizer can absorb oxygen in the demolding process, reduce oxide skin generated by the metal blank at high temperature and reduce loss of the metal blank.

Further, the extreme pressure deoxidizer is boron nitride, the precision forging release agent further comprises an activating agent, and the activating agent is one or a composite of potassium fluoborate, sodium fluoaluminate, calcium fluoride and magnesium chloride.

By adopting the technical scheme, in order to improve the hardness, wear resistance and corrosion resistance of the metal surface, the surface of the metal can be subjected to boronizing treatment, the common boronizing treatment method is solid boronizing, the solid boronizing is to place a workpiece in boron-containing powder or paste, heat the workpiece to a certain temperature, keep the temperature for a period of time, and enable boron atoms to permeate into the surface layer of the workpiece to form a hard boride permeating layer through chemical or electrochemical reaction so as to achieve the purpose of improving the wear resistance and oxidation resistance of the metal surface. Although the treatment method is simple, the labor intensity is high, the cost is high, and the production efficiency is reduced. In the process of stamping, boron nitride can consume oxygen and reduce oxide skin generated by the metal blank at high temperature, so that the roughness of the surface of the metal blank can be reduced, and the abrasion of the oxide skin on the surface of the metal blank to a die can be reduced; on the other hand, after the boron nitride is matched with the activating agent, gaseous boride can be formed in a forged high-temperature environment, and through repeated friction and stamping between the die and a metal blank, the gaseous boride is continuously compounded and decomposed on the surface of the die, active boron atoms are continuously released to be adsorbed by the surface of the die and diffused into the die, and a stable boride layer is formed, so that the wear resistance of the die can be improved, the service life of the die is prolonged, and the production cost is greatly reduced.

Further, the weight ratio of the boron nitride to the activator is (1-2.5): 1.

Further, the alkaline regulator is formed by mixing sodium carbonate and sodium hydroxide in a weight ratio of 1: 13; the stabilizer is sodium acetate.

By adopting the technical scheme, the sodium carbonate and the sodium hydroxide enable the whole system to be alkaline, so that the lubricant, the dispersant, the extreme pressure deoxidizer, the stabilizer and the complexing agent can be stably dispersed, and in the environment of an alkaline medium, the decontamination capability of the release agent can be improved, and the surface cleanliness and the glossiness of a metal blank are improved; sodium acetate is used as a stabilizer of the release agent, so that the stability of the complexing agent can be improved, and the pH value of the system can be adjusted by the sodium acetate.

Further, the graphite is one of crystalline flake graphite, earthy graphite and artificial graphite.

By adopting the technical scheme, the crystalline flake graphite is natural crystalline graphite which is similar to fish phosphorus in shape, belongs to a hexagonal system, is in a layered structure and has good performances of high temperature resistance, electric conduction, heat conduction, lubrication, plasticity, acid and alkali resistance and the like; the earthy graphite is also called microcrystalline graphite and has good high temperature resistance and lubricating property; the artificial graphite is a graphite material obtained by organic carbonization and graphitization high-temperature treatment, and has good corrosion resistance and lubricity.

The invention also aims to provide a preparation method of the precision forging release agent.

The technical purpose of the invention is realized by the following technical scheme:

a preparation method of a precision forging release agent comprises the following steps of:

s1: taking 615 parts of 600-13-part water, adding 100-118.8 parts of amorphous silica powder, 8-12 parts of stabilizing agent, 12-18 parts of extreme pressure deoxidizer, 13.5-16.5 parts of methylene dinaphthalene sodium sulfonate, 9-11 parts of sodium polyacrylate and 29.4-40.6 parts of alkaline regulator, and uniformly stirring to obtain a first suspension;

s2: taking 3000-3085 parts of water, adding 45-55 parts of sodium carboxymethylcellulose, 1000-1080 parts of graphite and 8-12 parts of complexing agent, and uniformly stirring to obtain a second suspension;

s3: and adding the second suspension into the first suspension, and uniformly stirring to obtain the precision forging release agent.

By adopting the technical scheme, the first suspension is obtained by taking the amorphous silicon dioxide powder as a base material, the second suspension is obtained by taking the graphite as a base material, and the finish forging release agent obtained by uniformly mixing the first suspension and the second suspension has stable product performance, good lubricating property, wear resistance, high temperature resistance, chemical stability and long storage life.

In summary, compared with the prior art, the invention has the following beneficial effects:

1. the amorphous silicon dioxide powder is used together with a dispersing agent, an extreme pressure deoxidizer and a complexing agent, so that the dispersibility and the suspension property of graphite can be improved, a formed release agent can be uniformly attached to the surface of a mold, the wear resistance, the high temperature resistance and the lubricity of the mold are improved, the wear between a metal blank and the mold is reduced, and the processed metal blank is easier to take out of the mold; under the action of the extreme pressure deoxidizer, when the die punches the metal blank, the extreme pressure deoxidizer can react with oxygen before the metal blank, so that the generation of oxide skin on the surface of the metal blank is reduced, the abrasion of the die is reduced, and the service life of the die is prolonged;

2. the amino carboxylate complexing agent and the alcamines complexing agent are compounded, so that the scale inhibition effect is good, the cleanness of a mold can be kept, and the generation of dirt is reduced; when the complexing agent is matched with the dispersing agent and the extreme pressure deoxidizer, graphite can be uniformly dispersed, and the stability of the release agent is improved;

3. the trisodium nitrilotriacetate has very strong complexing ability, belongs to an environment-friendly raw material, can form a complex with various metal ions, improves the suspension property of graphite in a release agent, and improves the stability of the product; the monoethanolamine and the diethanolamine have a certain anticorrosion and antibacterial effect besides the gain effect on the amino carboxylate complexing agent, and the retention period of the release agent and the stability of other generation quality can be improved by matching the monoethanolamine and the diethanolamine with the amino carboxylate complexing agent.

4. Silicon carbide, silicon nitride and boron nitride all belong to inorganic materials with excellent hard, heat-resistant and wear-resistant properties, and the high-temperature resistance of the release agent can be improved; the silicon nitride and the boron nitride also have lubricating property, so that the lubricating property of the release agent can be improved, and the release effect is improved; the extreme pressure deoxidizer can absorb oxygen in the demolding process, so that oxide skin generated by the metal blank at high temperature is reduced, and the loss of the metal blank is reduced;

5. boron nitride is used as an extreme pressure antioxidant in the precision forging release agent, and in the demolding process, on one hand, the boron nitride can consume oxygen and reduce oxide skin generated by a metal blank at high temperature, so that the roughness of the surface of the metal blank can be reduced, and the abrasion of the oxide skin on the surface of the metal blank to a mold is reduced; on the other hand, after the boron nitride is matched with the activating agent, a gas boride can be formed in a forged high-temperature environment, and through repeated friction and stamping between the die and a metal blank, the gas boride is continuously compounded and decomposed on the surface of the die, active boron atoms are continuously released to be adsorbed by the surface of the die and diffused into the die, and a stable boride layer is formed, so that the wear resistance of the die can be improved, the service life of the die is prolonged, and the production cost is greatly reduced;

6. the sodium carbonate and the sodium hydroxide in the regulator enable the whole system to be alkaline, in an alkaline medium, the viscosity of the sodium polyacrylate in the dispersing agent can be increased, the adhesive force of the lubricating agent to the die can be improved, and a uniform lubricating film can be formed in the inner cavity of the die; and in the environment of alkaline medium, the dirt-removing power of the release agent can be improved, and the surface cleanliness and the glossiness of the metal blank can be improved.

Detailed Description

The present invention will be described in further detail below.