Isolating agent composition, isolating agent and method for preparing the same, and isolating method
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- BEIJING TIAN LICHUANG SCI & TECH OF GLASS DEV
- Filing Date
- 2026-04-13
- Publication Date
- 2026-06-26
Smart Images
Figure SMS_1
Abstract
Description
Technical Field
[0001] This invention relates to the field of release agent technology, and more specifically, to a release agent composition, a release agent, a method for preparing the same, and a release method. Background Technology
[0002] Clad rolling is an advanced metal processing technology primarily used to produce high-performance and ultra-fine-grained metal sheets, particularly suitable for titanium alloys, titanium-steel composite sheets, and stainless steel composite sheets. This process involves stacking multiple layers of metal billets, sealing them with a cladding layer (such as low-carbon steel or pure titanium), and then hot-rolling them to achieve the production of thin sheets with large deformation and high yield.
[0003] In the cladding and rolling process of metals such as titanium alloys, titanium-steel composite plates, and stainless steel composite plates, to prevent adhesion between non-bonding areas of the plates and between the plates and the cladding metal during the cladding and rolling process at 800~1250℃, a release agent is commonly applied between each layer of metal billet. The release agent is a surface treatment agent specifically designed to prevent adhesion between two or more metal plates in non-bonding areas during the rolling process; it directly affects the quality, production efficiency, and cost of the rolled plate.
[0004] Currently, most release agents use inorganic powder slurries as the release medium, whose main components are graphite, nitrides, and alumina, lacking specific optimization for high-temperature lamination and rolling environments. While these release agents can achieve physical isolation to some extent, they may exhibit problems such as sintering tendency, insufficient fluidity, or poor adhesion stability under long-term high-temperature (800~1250℃) holding conditions. In some cases, they are prone to residue or difficult to remove, affecting surface quality and post-processing efficiency. Therefore, it is necessary to develop release agents that can prevent adhesion in non-bonded areas and have good protective performance at high temperatures. Summary of the Invention
[0005] The main objective of this invention is to provide a release agent composition, a release agent and its preparation method, and a release method to solve the problems of poor thermal stability, poor high-temperature release performance and poor antioxidant performance of existing release agents.
[0006] To achieve the above objectives, according to one aspect of the present invention, a release agent composition is provided, comprising, by weight parts: 15-20 parts of glass powder A, 20-30 parts of glass powder B, 5-10 parts of bentonite, 5-10 parts of kaolin, 5-10 parts of talc, and 13-22 parts of high-temperature resistant filler; wherein, by weight parts, glass powder A comprises: 46-50 parts of SiO2, 15- The glass powder B comprises, by weight, 20 parts Al2O3, 15-20 parts CaO, 5-10 parts Na2O, and 15-20 parts B2O3; 23-26 parts SiO2, 5-10 parts Al2O3, 6-12 parts CaO, 10-15 parts ZnO, 5-10 parts K2O, 5-10 parts BaO, and 5-10 parts Li2O; and high-temperature resistant fillers include MgO and ZrO2.
[0007] Further, by weight, the above-mentioned release agent composition includes: 16-19 parts of glass powder A, 21-28 parts of glass powder B, 6-9 parts of bentonite, 6-9 parts of kaolin, 6-9 parts of talc, and 14-20 parts of high-temperature resistant filler.
[0008] Furthermore, the mass ratio of MgO to ZrO2 in the high-temperature resistant filler is 8~12:5~10.
[0009] Furthermore, the mass ratio of glass powder A to glass powder B is 1:1.2~1.7; and / or, the softening point of glass powder A is 750~850℃, and the softening point of glass powder B is 500~600℃; and / or, the mass ratio of the total mass of glass powder A and glass powder B, the mass of MgO and the mass of ZrO2 is 35~45:9~10:6~9.
[0010] Furthermore, the release agent composition also includes a solvent, a binder, and an additive; wherein the solvent is 25-30 parts by weight; the solvent is water; the binder is 10-15 parts by weight; the binder includes an epoxy emulsion and an acrylic resin, and the mass ratio of the epoxy emulsion to the acrylic resin is 50-60:40-50; the additive is 0.1-5 parts by weight; the additive is selected from any one or more of dispersants, wetting agents, defoamers, film-forming aids, and thickeners.
[0011] According to another aspect of the invention, a release agent is provided, which is obtained by mixing a release agent composition comprising the release agent composition described above.
[0012] According to another aspect of the present invention, a method for preparing the above-mentioned release agent is provided, the method comprising: mixing a first raw material comprising glass powder A, glass powder B, bentonite, kaolin, talc and high-temperature filler to obtain the release agent.
[0013] Furthermore, the above preparation method further includes: first mixing the first raw material to obtain a mixture; second mixing the second raw material, including the mixture, binder, additives and solvent, to obtain a separating agent; wherein, the first mixing is ball milling; the ball-to-material ratio of the ball milling is 5~6:1, the ball milling speed is 90~100 r / min, and the ball milling time is 240~300 min; the second mixing is stirring, the stirring speed is 500~800 r / min, and the stirring time is 30~60 min.
[0014] According to another aspect of the present invention, a method for isolation using the above-mentioned release agent is provided. The method includes: coating the release agent onto the surface of a non-bonding area along the thickness direction of a plurality of adjacent alloy billets and drying it to form an isolation coating on the surface of the alloy billets, thereby obtaining a plurality of coated alloy billets; stacking the plurality of coated alloy billets to obtain a stacked billet; disposing a coating alloy material on the entire surface of the stacked billet to obtain a coated lap-rolled billet; heating the coated lap-rolled billet and rolling it; and after rolling, removing the coating alloy material and the release agent to obtain a lap-rolled alloy.
[0015] Furthermore, the alloy billet is selected from any one or more of titanium alloy, titanium-steel composite plate, and stainless steel composite plate; and / or, the cladding alloy material is selected from any one or more of stainless steel, titanium metal, and titanium alloy; and / or, the coating thickness of the release agent is 0.1~0.3mm; and / or, the drying temperature is 20~100℃, and the drying time is 10~30min; and / or, the heating temperature is 800~1250℃, and the heating time is 60~600min.
[0016] By applying the technical solution of this invention, and controlling the types and contents of each component in the release agent composition within the aforementioned range, a continuous, uniform, and stable release coating can be formed during the high-temperature cladding and rolling process at 800~1250℃. This prevents adhesion between non-bonded areas of the plates and between the plates and the cladding metal. Simultaneously, the release agent composition of this invention exhibits excellent high-temperature protection, effectively mitigating oxidation of the plates at high temperatures, thereby improving the quality of the rolled plates. Specifically, the glass powder B in the above composition enables rapid film formation, stable isolation, and easy removal; the glass powder A in the above composition enhances the high-temperature stability of the release agent composition, thereby improving the interfacial bonding force between the release coating and the plates. Under the combined action of glass powder A and glass powder B, a dense, continuous, and non-adhesive glass phase network can be formed within a wide temperature range from furnace entry to heating to the target temperature of the cladding and rolling billet. This avoids direct surface contact between plates and prevents oxygen diffusion and interfacial reactions, thus achieving efficient isolation. Bentonite, kaolin, and talc effectively improve the suspension, coating uniformity, and high-temperature adhesion of the coating. Bentonite expands rapidly upon heating, effectively inhibiting adhesion between sheets, while talc has a low coefficient of friction at high temperatures, suppressing adhesion in non-bonded areas during rolling. MgO and ZrO2 in the high-temperature fillers significantly enhance the heat erosion resistance of the release agent composition, effectively inhibiting interfacial reactions and oxide formation. Furthermore, the release agent composition of this application produces almost no gas at high temperatures, making it perfectly suited for the vacuum-sealing process required after coating. In summary, the release agent of this application can form a stable protective layer during alloy coating and rolling, and is easily removed, thereby improving the surface quality and production efficiency after rolling. Detailed Implementation
[0017] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the embodiments.
[0018] As analyzed in the background section of this application, existing technologies have problems such as poor thermal stability of release agents at high temperatures, poor high-temperature isolation performance, and poor antioxidant performance. In order to solve the above problems, this application provides a release agent composition, a release agent, a preparation method thereof, and an isolation method thereof.
[0019] In a typical embodiment of this application, a release agent composition is provided, comprising, by weight: 15-20 parts of glass powder A, 20-30 parts of glass powder B, 5-10 parts of bentonite, 5-10 parts of kaolin, 5-10 parts of talc, and 13-22 parts of high-temperature resistant filler; wherein, by weight, glass powder A comprises: 46-50 parts of SiO2, 15-20 parts of bentonite, 5-10 parts of kaolin, 5-10 parts of talc, and 13-22 parts of high-temperature resistant filler. The glass powder B comprises, by weight, 23-26 parts of SiO2, 5-10 parts of Al2O3, 6-12 parts of CaO, 10-15 parts of ZnO, 5-10 parts of K2O, 5-10 parts of BaO, and 5-10 parts of Li2O; the high-temperature resistant filler includes MgO and ZrO2.
[0020] By controlling the types and contents of each component in the release agent composition of this application within the aforementioned range, a continuous, uniform, and stable release coating can be formed during the high-temperature cladding and rolling process at 800~1250℃. This prevents adhesion between non-bonded areas of the sheets and between the sheets and the cladding metal. Simultaneously, the release agent composition of this application exhibits excellent high-temperature protection, effectively mitigating oxidation of the sheets at high temperatures, thereby improving the quality of the rolled sheets. Specifically, glass powder B, as described above, enables rapid film formation, stable isolation, and easy removal; glass powder A, as described above, enhances the high-temperature stability of the release agent composition, thereby improving the interfacial bonding between the release coating and the sheets. Under the combined action of glass powder A and glass powder B, a dense, continuous, and non-adhesive glass phase network can be formed over a wide temperature range from furnace entry to heating to the target temperature of the cladding and rolling billet. This avoids direct contact between the surfaces of non-bonded areas of the sheets and prevents oxygen diffusion and interfacial reactions, thus achieving efficient isolation. Bentonite, kaolin, and talc effectively improve the suspension, coating uniformity, and high-temperature adhesion of the coating. Bentonite expands rapidly upon heating, effectively inhibiting adhesion between sheets, while talc has a low coefficient of friction at high temperatures, suppressing adhesion in non-bonded areas during rolling. MgO and ZrO2 in the high-temperature fillers significantly enhance the heat erosion resistance of the release agent composition, effectively inhibiting interfacial reactions and oxide formation. Furthermore, the release agent composition of this application produces almost no gas at high temperatures, making it perfectly suited for the vacuum-sealing process required after coating. In summary, the release agent of this application can form a stable protective layer during alloy coating and rolling, and is easily removed, thereby improving the surface quality and production efficiency after rolling.
[0021] The preferred solid components (glass powder A, glass powder B, bentonite, kaolin, talc and high-temperature resistant filler) have a particle size of 200-400 mesh.
[0022] In order to further improve the isolation performance, high-temperature thermal stability and protective performance of the release agent, in one embodiment of this application, the release agent composition comprises, by weight, 16-19 parts of glass powder A, 21-28 parts of glass powder B, 6-9 parts of bentonite, 6-9 parts of kaolin, 6-9 parts of talc, and 14-20 parts of high-temperature resistant filler.
[0023] In one embodiment of this application, the mass ratio of MgO to ZrO2 in the high-temperature resistant filler is 8~12:5~10.
[0024] The preferred high-temperature filler has a mass ratio of MgO to ZrO2 within the above range, which helps to further improve the high-temperature resistance and isolation performance of the release agent composition, allowing the release coating to adhere tightly to the surface of the alloy at high temperatures, and further improving the density of the release coating.
[0025] In one embodiment of this application, the mass ratio of glass powder A to glass powder B is 1:1.2~1.7; and / or, the softening point of glass powder A is 750~850℃, and the softening point of glass powder B is 500~600℃; and / or, the ratio of the total mass of glass powder A and glass powder B, the mass of MgO and the mass of ZrO2 is 35~45:9~10:6~9.
[0026] Preferably controlling the mass ratio of glass powder A and glass powder B within the aforementioned range helps to enhance their synergistic effect, thereby forming a continuous, uniform, and stable protective layer during alloy cladding and rolling, and thus improving the quality of the rolled sheet. Preferably, the softening point of glass powder B is within the aforementioned range, which helps it soften and melt initially during the early stages of alloy hot forming, forming a dense and continuous initial protective film. Preferably, the softening point of glass powder A is within the aforementioned range, which helps it delay melting at high temperatures, synergistically spreading with the initial film layer formed by glass powder A, and maintaining structural integrity at high temperatures, forming a continuous, uniform, and stable protective coating.
[0027] Preparation method of glass powder: Weigh the raw materials according to the component ratio, and wet ball mill for 6-8 hours to obtain a slurry; melt the slurry at 1450-1500℃ for 2-3 hours, and then cool it with water to obtain a glass block; crystallize the glass block at 1050-1080℃ (glass powder A) or 950-980℃ (glass powder B) in a nitrogen atmosphere for 2-3 hours to obtain a glass body containing microcrystalline phase; pulverize the crystallized glass body by air jet and classify and sieve to obtain glass powder.
[0028] Preferably controlling the total mass of glass powder A and glass powder B, the mass ratio of MgO and ZrO2 within the above range helps to improve the high-temperature thermal stability and physical isolation effect of the isolation coating, and forms a glass phase network with moderate softening behavior and structural integrity, which exhibits suitable rheological properties at high temperatures, thereby improving the anti-blocking performance of the isolation coating.
[0029] In one embodiment of this application, the release agent composition further includes a solvent, a binder, and an additive; wherein the solvent is 25-30 parts by weight; the solvent is water; the binder is 10-15 parts by weight; the binder includes an epoxy emulsion and an acrylic resin, and the mass ratio of the epoxy emulsion to the acrylic resin is 50-60:40-50; the additive is 0.1-5 parts by weight; the additive is selected from any one or more of dispersants, wetting agents, defoamers, film-forming aids, and thickeners.
[0030] Adding solvents of the types and amounts mentioned above helps to ensure that the components are fully dispersed in the solvent, which in turn facilitates the uniform coating of the release agent.
[0031] Adding the aforementioned types and amounts of binders helps improve the adhesion of the isolation coating, ensuring it adheres firmly to the metal surface before baking, thereby reducing coating peeling. Optionally, the epoxy emulsion is selected from any one or more of MT-HY12, WEP-804, and ZN6153, and the acrylic resin is selected from any one or more of AC5161, ARL-453, and WA-010.
[0032] Adding the above-mentioned types and amounts of additives helps to better adjust the required performance of the release agent.
[0033] The dispersant is selected from any one or more of Solsperse W75, Coadis BR 85 and Dispex AA 4140. It is preferred to add the above-mentioned types and amounts of dispersant, which helps to stabilize the suspension state of solid particles in the aqueous phase and reduce sedimentation and agglomeration.
[0034] The wetting agent is selected from any one or more of TEGO Wet 270, ETERAD 4643 and QX-3270. It is preferred to add the above-mentioned types and amounts of wetting agents, which helps to reduce the surface tension of the release agent composition, promote its spreading and wetting on the metal substrate, and thus improve the integrity of the coating.
[0035] The defoamer is selected from any one or more of FoamStar SI 2293, RH-9210 and RH-9501. It is preferred to add the above-mentioned types and amounts of defoamer to help eliminate bubbles generated during stirring and coating, and reduce the probability of pinholes or other defects.
[0036] The film-forming aid is selected from any one or more of Loxanol CA 5308, Loxanol CA 5330 and DPM. It is preferred to add the above-mentioned types and amounts of film-forming aids to help promote the formation of a continuous and dense isolation coating.
[0037] The thickener is selected from any one or more of Rheovis HS 1162, SMP-654 and TEGO Viscoplus 3030. It is preferred to add the above-mentioned types and amounts of thickener, which helps to regulate the rheological properties of the release agent composition, thereby improving the storage stability and anti-sagging properties of the release agent.
[0038] In another typical embodiment of this application, a release agent is provided, which is obtained by mixing a release agent composition comprising the release agent composition described above.
[0039] The release agent comprising the above-mentioned release agent composition can form a continuous, uniform and stable release coating during high-temperature cladding and rolling at 800~1250℃, thereby preventing adhesion between non-bonded areas of the plates and between the plates and the cladding metal. At the same time, the release agent of this application has a good high-temperature protection effect and can effectively slow down the oxidation of the plates at high temperatures, thereby improving the quality of the rolled plates.
[0040] This release agent should be stored in a sealed container in a cool, dry place. Slight sedimentation may occur after prolonged storage; simply stir well before use.
[0041] In another typical embodiment of this application, a method for preparing a release agent is provided, the method comprising: mixing a first raw material comprising glass powder A, glass powder B, bentonite, kaolin, talc powder and high-temperature filler to obtain a release agent.
[0042] The release agent prepared by the method of this application exhibits excellent high-temperature stability, release performance, and protective properties. It can form a continuous, uniform, and stable release coating during high-temperature cladding and rolling at 800~1250℃, thereby preventing adhesion between non-bonding areas of the plates and between the plates and the cladding metal. Simultaneously, the release agent provides excellent high-temperature protection, effectively mitigating oxidation of the plates at high temperatures, thus improving the quality of the rolled plates. Furthermore, the preparation method of this application is simple, easy to operate, and conducive to large-scale production.
[0043] In one embodiment of this application, the preparation method further includes: mixing a first raw material to obtain a mixture; mixing a second raw material comprising the mixture, a binder, an additive, and a solvent to obtain a separating agent; wherein the first mixing is ball milling; the ball-to-material ratio of the ball milling is 5~6:1, the ball milling speed is 90~100 r / min, and the ball milling time is 240~300 min; the second mixing is stirring, the stirring speed is 500~800 r / min, and the stirring time is 30~60 min.
[0044] Controlling the conditions of the first mixing within the above range helps to fully mix the solid components such as glass powder A, glass powder B, bentonite, kaolin, talc, and high-temperature filler. Subsequently, the binder, additives, and solvent are added, and the conditions of the second mixing are controlled within the above range. This helps to fully disperse each component in the solvent, thereby improving the component uniformity of the release agent.
[0045] In another typical embodiment of this application, a method for isolation using the above-mentioned release agent is provided. The isolation method includes: coating the release agent onto the surface of the non-bonding area along the thickness direction of multiple adjacent alloy billets and drying it to form an isolation coating on the surface of the non-bonding area of the alloy billets, thereby obtaining multiple coated alloy billets; stacking the multiple coated alloy billets to obtain a stacked billet; applying a coating alloy material to all surfaces (including the upper surface, lower surface, and side surface) of the stacked billet to obtain a coated rolled billet; heating the coated rolled billet and rolling it; and after rolling, removing the coating alloy material and the release agent to obtain the rolled alloy.
[0046] By using a release agent and the above-mentioned release method, a continuous, uniform and stable release coating can be formed during the high-temperature cladding and rolling process at 800~1250℃, thereby preventing adhesion between non-bonding areas of the plates and between the plates and the cladding metal material. It can also provide protection for the alloy, thereby effectively slowing down the oxidation of the plates at high temperatures and improving the quality of the alloy after rolling.
[0047] After the coating and rolling process, the residual release agent on the surface can be removed by pickling.
[0048] In one embodiment of this application, the alloy billet is selected from any one or more of titanium alloy, titanium-steel composite plate, and stainless steel composite plate; and / or, the cladding alloy material is selected from any one or more of stainless steel, titanium metal, and titanium alloy; and / or, the coating thickness of the release agent is 0.1~0.3mm; and / or, the drying temperature is 20~100℃, and the drying time is 10~30min; and / or, the heating temperature is 800~1250℃, and the heating time is 60~600min.
[0049] Preferred cladding alloys and controlled rolling parameters within the above ranges help maintain the integrity of the isolation coating at high temperatures, rather than melting and failing, thereby maintaining a stable isolation effect. At the same time, suitable alloy plastic deformation windows prevent adhesion, cracking and surface oxidation, ensuring smooth rolling process and stable finished product quality.
[0050] The beneficial effects of this application will be further illustrated below with reference to the embodiments.
[0051] Example 1
[0052] Preparation of the separating agent:
[0053] The raw materials of the release agent composition, by weight, are: 17 parts glass powder A, 26 parts glass powder B, 7 parts bentonite, 8 parts kaolin, 7 parts talc, 10 parts high-temperature resistant filler MgO, 8 parts high-temperature resistant filler ZrO2, 11 parts binder, 1 part dispersant Solsperse W75, 0.5 parts wetting agent TEGO Wet 270, 0.1 parts defoamer FoamStarSI 2293, 0.5 parts film-forming aid Loxanol CA 5308, 1 part thickener Rheovis HS 1162, and 25 parts solvent water. Among these, glass powder A, by weight, comprises: 47 parts SiO2, 17 parts Al2O3, 18 parts CaO, 7 parts Na2O, and 17 parts B2O3. The softening point temperature of glass powder A is 800℃. By weight, glass powder B comprises: 24 parts SiO2, 7 parts Al2O3, 10 parts CaO, 12 parts ZnO, 7 parts K2O, 7 parts BaO, and 8 parts Li2O. The softening point of glass powder B is 550℃. The binder is obtained by mixing 6 parts epoxy emulsion MT-HY12 and 5 parts acrylic resin AC5161. The particle size of glass powder A, glass powder B, bentonite, and high-temperature filler is 300 mesh.
[0054] Glass powder A, glass powder B, bentonite, kaolin, talc, and high-temperature filler were ball-milled in a ball mill jar until the D50 particle size was 1.3 μm, resulting in a mixture. The ball-to-particle ratio was 5:1, the ball milling speed was 95 rpm, and the milling time was 5 hours. The mixture, dispersant, wetting agent, defoamer, film-forming aid, thickener, and binder were stirred in a mixer at 600 rpm for 30 minutes to obtain a separating agent.
[0055] Isolation methods for release agents:
[0056] A release agent was applied to the upper and lower surfaces of multiple adjacent alloy billets (TC4 titanium alloy), and then dried at 25°C for 15 minutes to obtain multiple coated alloy billets. These coated alloy billets were then stacked to obtain a clad laminated billet. A cladding alloy material, stainless steel, was placed on all surfaces of the clad laminated billet, namely the upper, lower, and side surfaces, to obtain a clad rolled billet. The clad rolled billet was heated in a furnace to 950°C for 240 minutes and then rolled. After rolling, the cladding alloy material was removed, and the release agent on the surface of the alloy billet was removed by pickling to obtain a titanium alloy sheet (clustered alloy).
[0057] Example 2
[0058] The difference from Example 1 lies in the preparation of the release agent: The raw materials for the release agent composition, by weight, are: 15 parts glass powder A, 30 parts glass powder B, 5 parts bentonite, 10 parts kaolin, 5 parts talc, 8 parts high-temperature resistant filler MgO, 10 parts high-temperature resistant filler ZrO2, 10 parts binder, 0.5 parts dispersant, 1 part wetting agent, 0.5 parts defoamer, 1 part film-forming aid, 0.5 parts thickener, and 28 parts solvent water. Specifically, by weight, glass powder A comprises 46 parts SiO2, 20 parts Al2O3, 15 parts CaO, 10 parts Na2O, and 15 parts B2O3. The softening point temperature of glass powder A is 830°C. By weight, glass powder B comprises 23 parts SiO2, 10 parts Al2O3, 6 parts CaO, 15 parts ZnO, 5 parts K2O, 10 parts BaO, and 5 parts Li2O. The softening point of glass powder B is 530℃. The binder comprises 5 parts epoxy emulsion and 5 parts acrylic resin, ultimately yielding a release agent.
[0059] Isolation methods for release agents:
[0060] A release agent is applied to the upper and lower surfaces of multiple adjacent alloy billets (titanium-steel composite plates), and then dried at 60°C for 30 minutes to obtain multiple coated alloy billets. These coated alloy billets are then stacked to obtain a clad laminated billet. A stainless steel cladding alloy is placed on all surfaces of the clad laminated billet, namely the upper, lower, and side surfaces, to obtain a clad rolled billet. The clad rolled billet is heated in a furnace to 1050°C for 240 minutes and then rolled. After rolling, the cladding alloy is removed, and the release agent on the surface of the alloy billet is removed by pickling to obtain a titanium alloy sheet (laminated alloy).
[0061] Example 3
[0062] The difference from Example 1 lies in the preparation method of the release agent: The raw materials of the release agent composition, by weight, are: 20 parts glass powder A, 20 parts glass powder B, 10 parts bentonite, 5 parts kaolin, 10 parts talc, 12 parts high-temperature resistant filler MgO, 10 parts high-temperature resistant filler ZrO2, 15 parts binder, 1.5 parts dispersant, 0.5 parts wetting agent, 1 part defoamer, 1 part film-forming aid, 0.5 parts thickener, and 30 parts solvent water. Specifically, by weight, glass powder A comprises 50 parts SiO2, 15 parts Al2O3, 20 parts CaO, 5 parts Na2O, and 20 parts B2O3. The softening point temperature of glass powder A is 780℃. By weight, glass powder B comprises 26 parts SiO2, 5 parts Al2O3, 12 parts CaO, 10 parts ZnO, 5 parts K2O, 10 parts BaO, and 5 parts Li2O. The softening point of glass powder B is 580℃. The binder comprises 8 parts epoxy emulsion and 7 parts acrylic resin, ultimately yielding a release agent.
[0063] Isolation methods for release agents:
[0064] After applying a release agent to the upper and lower surfaces of multiple adjacent alloy billets (stainless steel composite plates), they are dried at 100°C for 10 minutes to obtain multiple coated alloy billets. These coated alloy billets are then stacked to obtain a clad laminated billet. Stainless steel cladding alloy material is placed on all surfaces of the clad laminated billet, including the upper, lower, and side surfaces, resulting in a clad rolled billet, which is then vacuum-sealed. The clad rolled billet is then placed in a furnace and heated to 1150°C for 240 minutes before rolling. After rolling, the cladding alloy material is removed, and the release agent on the surface of the alloy billet is removed by pickling to obtain a titanium alloy sheet (clustered alloy).
[0065] Example 4
[0066] The difference from Example 1 is that the total weight of glass powder A and glass powder B is 43 parts, and the mass ratio of glass powder A to glass powder B is 1:1.7, ultimately yielding a release agent and a rolled alloy.
[0067] Example 5
[0068] The difference from Example 1 is that the total weight of glass powder A and glass powder B is 43 parts, and the mass ratio of glass powder A to glass powder B is 1:1.15, ultimately yielding a release agent and a rolled alloy.
[0069] Example 6
[0070] The difference from Example 1 is that the total weight of glass powder A, glass powder B, MgO and ZrO2 is 61 parts, and the ratio of the total mass of glass powder A and glass powder B, the mass of MgO and the mass of ZrO2 is 46:9:6, finally obtaining the release agent and the rolled alloy.
[0071] Example 7
[0072] The difference from Example 1 is that the total weight of glass powder A, glass powder B, MgO and ZrO2 is 61 parts, and the ratio of the total mass of glass powder A and glass powder B, the mass of MgO and the mass of ZrO2 is 48:8:5, finally obtaining the release agent and the rolled alloy.
[0073] Comparative Example 1
[0074] The difference from Example 1 is that the release agent is a graphite-based release agent, which, by weight, comprises 97 parts of high-purity flake graphite, 2 parts of binder clay, and 1 part of dispersant, ultimately yielding a laminated alloy.
[0075] Comparative Example 2
[0076] The difference from Example 1 is that the release agent is an oxide-based release agent, which is a suspension formed by mixing titanium dioxide in water, and finally the alloy after lamination is obtained.
[0077] Comparative Example 3
[0078] The difference from Example 1 is that the release agent is a ceramic release agent, which, by weight, includes 60 parts of alumina, 20 parts of zirconium oxide, 6 parts of calcium oxide, 5 parts of boric acid and 1 part of sodium carbonate, ultimately yielding the rolled alloy.
[0079] Comparative Example 4
[0080] The difference from Example 1 is that, by weight, the raw materials of the release agent composition are: 12 parts of glass powder A, 35 parts of glass powder B, 3 parts of bentonite, 12 parts of kaolin, 2 parts of talc, 6 parts of MgO, 4 parts of ZrO2, 18 parts of binder, 15 parts of dispersant, 12 parts of wetting agent, 10 parts of defoamer, 65 parts of film-forming aid, 8 parts of thickener, and 15 parts of solvent water. Specifically, by weight, glass powder A comprises 42 parts of SiO2, 22 parts of Al2O3, 12 parts of CaO, 11 parts of Na2O, and 13 parts of B2O3. By weight, glass powder B comprises 21 parts SiO2, 12 parts Al2O3, 13 parts CaO, 17 parts ZnO, 11 parts K2O, 12 parts BaO, and 13 parts Li2O, ultimately yielding a release agent and a rolled alloy.
[0081] Test method:
[0082] Defect depth on the alloy surface after lamination and rolling: eddy current testing (which detects surface and near-surface defects using electromagnetic induction principles, is fast, and facilitates automated defect observation) is used to identify defects as dents and cracks.
[0083] Protective performance: The degree of oxidation is assessed by measuring the oxidation weight loss of the sample after rolling.
[0084] The test results are shown in Table 1.
[0085] Table 1
[0086]
[0087] As shown above, while the graphite-based release agent in Comparative Example 1 has certain isolation and lubrication effects, it causes severe pollution (black dust), and the residual carbon may affect the corrosion resistance of certain special steels (such as austenitic stainless steel), and cleaning is difficult. The oxide-based release agent in Comparative Example 2 requires high control over coating uniformity and is prone to microcracks after drying. The release agents in Comparative Examples 1 and 2 exhibit poor stability and protective performance at high temperatures. Although the ceramic-based release agent in Comparative Example 3 has good high-temperature performance, the coating is brittle and prone to premature peeling, resulting in poor protective performance, and the residual silicon and aluminum elements are impurities for high-purity metals.
[0088] As can be seen from the above description, the embodiments of the present invention achieve the following technical effects:
[0089] By controlling the types and contents of each component in the release agent composition of this application within the aforementioned range, a continuous, uniform, and stable release coating can be formed during the high-temperature cladding and rolling process at 800~1250℃. This prevents adhesion between non-bonded areas of the sheets and between the sheets and the cladding metal. Simultaneously, the release agent composition of this application exhibits excellent high-temperature protection, effectively mitigating oxidation of the sheets at high temperatures, thereby improving the quality of the rolled sheets. Specifically, glass powder B, as described above, enables rapid film formation, stable isolation, and easy removal; glass powder A, as described above, enhances the high-temperature stability of the release agent composition, thereby improving the interfacial bonding between the release coating and the sheets. Under the combined action of glass powder A and glass powder B, a dense, continuous, and non-adhesive glass phase network can be formed over a wide temperature range from furnace entry to heating to the target temperature of the cladding and rolling billet. This avoids direct surface contact between sheets and prevents oxygen diffusion and interfacial reactions, thus achieving efficient isolation. Bentonite, kaolin, and talc effectively improve the suspension, coating uniformity, and high-temperature adhesion of the coating. Bentonite expands rapidly upon heating, effectively inhibiting adhesion between sheets, while talc has a low coefficient of friction at high temperatures, suppressing adhesion in non-bonded areas during rolling. MgO and ZrO2 in the high-temperature fillers significantly enhance the heat erosion resistance of the release agent composition, effectively inhibiting interfacial reactions and oxide formation. Furthermore, the release agent composition of this application produces almost no gas at high temperatures, making it perfectly suited for the vacuum-sealing process required after coating. In summary, the release agent of this application can form a stable protective layer during alloy coating and rolling, and is easily removed, thereby improving the surface quality and production efficiency after rolling.
[0090] The above are merely embodiments of the present invention and are not intended to limit the invention. Those skilled in the art will recognize that the present invention can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.
Claims
1. A separating agent composition, characterized in that, The separating agent composition comprises, by weight parts: 15-20 parts of glass powder A; 20-30 parts of glass powder B; 5-10 parts bentonite; 5-10 parts kaolin; 5-10 parts talcum powder; and 13-22 parts of high-temperature resistant filler; The glass powder A, by weight, comprises: 46-50 parts of SiO2, 15-20 parts of Al2O3, 15-20 parts of CaO, 5-10 parts of Na2O, and 15-20 parts of B2O3. By weight, the glass powder B comprises: 23-26 parts of SiO2, 5-10 parts of Al2O3, 6-12 parts of CaO, 10-15 parts of ZnO, 5-10 parts of K2O, 5-10 parts of BaO, and 5-10 parts of Li2O. The high-temperature resistant filler includes MgO and ZrO2.
2. The separating agent composition according to claim 1, characterized in that, The separating agent composition comprises, by weight parts: 16-19 parts of the glass powder A; 21-28 parts of the glass powder B; 6 to 9 parts of the bentonite mentioned above; 6 to 9 parts of the kaolin mentioned above; 6 to 9 parts of the talc powder; and 14 to 20 parts of the high-temperature resistant filler.
3. The release agent composition according to claim 1 or 2, characterized in that, The mass ratio of MgO to ZrO2 in the high-temperature resistant filler is 8~12:5~10.
4. The release agent composition according to any one of claims 1 to 3, characterized in that, The mass ratio of glass powder A to glass powder B is 1:1.2~1.7; and / or, the softening point of glass powder A is 750~850℃, and the softening point of glass powder B is 500~600℃. And / or, the ratio of the total mass of glass powder A and glass powder B, the mass of MgO and the mass of ZrO2 is 35~45:9~10:6~9.
5. The release agent composition according to any one of claims 1 to 4, characterized in that, The release agent composition further includes solvents, binders, and additives; The solvent is 25-30 parts by weight; the solvent is water. The adhesive is 10-15 parts by weight; the adhesive comprises epoxy emulsion and acrylic resin, and the mass ratio of epoxy emulsion to acrylic resin is 50-60:40-50. The additive is 0.1 to 5 parts by weight; the additive is selected from any one or more of dispersants, wetting agents, defoamers, film-forming aids and thickeners.
6. A separating agent, obtained by mixing a separating agent composition, characterized in that, The release agent composition comprises the release agent composition according to any one of claims 1 to 5.
7. A method for preparing the separating agent according to claim 6, characterized in that, The preparation method includes: The first raw materials, including glass powder A, glass powder B, bentonite, kaolin, talc, and high-temperature filler, are first mixed to obtain a separating agent.
8. The preparation method according to claim 7, characterized in that, The preparation method further includes: mixing the first raw material to obtain a mixture; and mixing the second raw material, which includes the mixture, binder, additives and solvent, to obtain the release agent. Wherein, the first mixing is ball milling; the ball-to-material ratio of the ball milling is 5~6:1, the ball milling speed is 90~100 r / min, and the ball milling time is 240~300 min; the second mixing is stirring, the stirring speed is 500~800 r / min, and the stirring time is 30~60 min.
9. A method for isolation using the separating agent according to claim 6, characterized in that, The isolation methods include: After applying a release agent to the surface of the non-bonded area along the thickness direction of multiple adjacent alloy billets and drying it, a release coating is formed on the surface of the alloy billets, resulting in multiple coated alloy billets. Multiple coated alloy blanks are stacked to obtain a laminated blank; A coating alloy material is applied to the entire surface of the laminated billet to obtain a coated laminated billet. The coated and rolled billet is heated and rolled. After rolling, the coating alloy material is removed and the release agent is removed to obtain the rolled alloy.
10. The isolation method according to claim 9, characterized in that, The alloy billet is selected from any one or more of titanium alloys, titanium-steel composite plates, and stainless steel composite plates; and / or, the cladding alloy material is selected from any one or more of stainless steel, titanium metal, and titanium alloys; And / or, the coating thickness of the release agent is 0.1~0.3 mm; and / or, the drying temperature is 20~100℃, and the drying time is 10~30 min; And / or, the heating temperature is 800~1250℃, and the heating time is 60~600min.