Manufacturing method for coating non-stick roll part produced by aluminum-silicon plate and galvanized plate in collinear mode

Abstract

The invention relates to the technical field of thermal forming, and particularly discloses a manufacturing method for a coating non-stick roller part produced by an aluminum-silicon plate and a galvanized plate collinearly, which comprises the following steps: S1, cutting to obtain a plate material; s2, the plate is subjected to staggered or partitioned heat treatment; s3, performing hot pressing or hot bath stamping on the plate to obtain a part; the step S2 comprises four heating and heat preservation areas, namely a first heating and heat preservation area, a second heating and heat preservation area, a third heating and heat preservation area and a fourth heating and heat preservation area. According to the invention, the problem that the zinc-based coating plate and the aluminum-silicon coating plate are adhered to each other during collinear production can be effectively solved, and the zinc-based coating plate without roller-adhered aluminum-silicon particles on the surface and the aluminum-silicon coating part without golden yellow point-like and white point-like objects on the surface are obtained. Meanwhile, compared with the prior art, the heating time is remarkably shortened, the production takt is optimized, a coating does not need to be specially made, and the production cost is lower.

Description

Technical Field

[0001] The invention relates to the technical field of hot forming, and specifically discloses a method for manufacturing parts of a non-stick coating roller produced on a co-line of an aluminum silicon plate and a galvanized plate. Background Art

[0002] Based on the premise of lightweight and safety of automobiles, the proportion of ultra-high-strength hot-formed steel in the body-in-white is increasing. Although lightweight materials such as aluminum alloy, magnesium alloy, titanium alloy, etc. can also reduce the weight of the whole vehicle and reduce fuel consumption, their cost performance is not as high as that of high-strength steel. At present, the high-strength steel that has been maturely applied is mainly bare plate and aluminum-silicon coated plate. Bare plate has oxidation and decarburization problems at high temperature, which not only affects the life of the mold, but also has poor corrosion resistance of the parts after forming. Although the aluminum-silicon coated plate can improve the corrosion resistance of the parts after forming to a certain extent, it does not have cathodic protection. Therefore, the improvement of its coating corrosion resistance is limited.

[0003] Compared with conventional bare plates and aluminum-silicon coated plates, zinc-based coated plate parts have cathodic protection, and their anti-corrosion performance is more than 3 times that of aluminum-silicon coatings. At the same time, as colleges and universities, steel mills, parts and components manufacturers continue to increase their research investment in the hot forming process of zinc-based coated plates, the LMIE phenomenon that occurs during direct hot forming of zinc-based coated plates, which leads to deeper microcracks, has been gradually solved, and even some parts companies have begun to industrialize the direct hot forming process of zinc-based coated plates.

[0004] However, based on the current production line, when producing zinc-based plate, it is inevitable to produce it on the same line as aluminum-silicon plate, which will cause serious zinc-plating aluminum-silicon sticking problems, resulting in granular sticking on the surface of parts and affecting the subsequent coating electrophoresis process. Therefore, in order to increase the proportion of hot-formed zinc-based plated parts on the body-in-white and promote the application of zinc-based plate materials, it is of great significance to solve the zinc-based plate sticking problem.

[0005] Patent CN116855870A discloses a coated hot stamping steel part and a preparation method thereof, which adopts the method of setting n sections of heat preservation steps, and at the same time, by calculating the ratio of the thickness of the interdiffusion layer in the sheet to the thickness of the surface alloy layer, comparing the value with the preset value, and then judging whether the sheet has completed austenitization, and at the same time, solving the technical problem that the coating is easy to stick to the roller during the heating process of the existing coated hot stamping steel, characterized in that according to the ratio of the thickness of the interdiffusion layer in the first austenitized sheet to the thickness of the surface alloy layer and the preset value 0.1 size, to determine whether to adopt the method of increasing the number of insulation steps one by one to perform different modes of austenitizing heat treatment on a number of sheets, until n insulation steps are set to perform the nth mode austenitizing heat treatment on the nth sheet, so that the ratio of the thickness of the interdiffusion layer in the nth sheet to the thickness of the surface alloy layer reaches a preset ratio, and the target austenitized sheet is obtained, and its endpoint temperature is >840℃, the time of the nth mode austenitizing heat treatment is <12min, the die temperature of the stamping is <100℃, and the cooling rate is >27℃ / s. Based on the current production process, the patent has a long heating time, which will significantly extend the production cycle.

[0006] Patent CN115156845A discloses a method for producing galvanized hot-formed steel to prevent coating from sticking to rollers, which is characterized in that the stamping and forming heating process is divided into three stages: in the first stage, the sheet is heated to 250-300°C, kept warm for 2-3 minutes, and the heating rate is 10-30°C / s; in the second stage, the sheet is heated to 600-650°C, kept warm for 3-5 minutes, and the heating rate is 5-15°C / s; in the third stage, the sheet is heated to 880-920°C, kept warm for 5-10 minutes, and the heating rate is 5-15°C / s. It adopts a conventional hot stamping process, with a holding time of 10-20 seconds, a quenching cooling rate of 30-60°C / s, a mold temperature of 200-300°C, and then air-cooled to room temperature. Similarly, the patent prolongs the heating time, which is very unfavorable for the control of production rhythm.

[0007] Patent CN116219271A discloses an aluminum-silicon coated steel plate, a hot-formed component and a manufacturing method thereof. The aluminum-silicon coated steel plate is characterized in that the surface of the aluminum-silicon coating is also covered with a coating, the coating contains C, H, O, N, Si elements and does not contain P elements, wherein the Si content of the coating is 10-1000 mg / m2, and the manufacturing method is characterized in that heat treatment is performed in a furnace: the heating rate of the blank from room temperature to 700°C is controlled to be 830°C / s, the heating rate from 700-900°C is 110°C / s, and the total residence time of the blank in the heat treatment furnace is controlled to be 1-15 min. Although this patent can solve the problem of roller sticking to a certain extent, its raw materials require special coatings, which will increase production costs, and it is only applicable to the roller sticking problem of aluminum-silicon coated plates, and is not universal.

[0008] It can be seen that the existing solutions for the roller sticking of hot-formed coated plates are mostly suitable for aluminum-silicon plates, mainly by significantly extending the heating time of the plate in the heating furnace or using aluminum-silicon coated plates with special coating materials, thereby achieving less or no roller sticking. For zinc-based coated plates, when produced on the same line with aluminum-silicon coated plates, not only will granular aluminum-silicon roller sticking occur on the surface of the zinc-based coated plates, but it will also have a serious impact on the aluminum-silicon coated plates. When producing aluminum-silicon products, aluminum-silicon roller sticking galvanizing is manifested as golden dot-like areas and white dot-like attachments in some areas, which seriously affects normal production. The cost of using existing patented technologies is too high, and it cannot solve the roller sticking problem during co-line production.

[0009] Based on the fact that the above existing technologies are unable to effectively solve the problem of sticking rollers when aluminum silicon plates and galvanized plates are produced on the same line, the present invention aims to propose a method for manufacturing components for non-stick rollers when aluminum silicon plates and galvanized plates are produced on the same line. Summary of the invention

[0010] When the existing hot forming roller furnace is producing aluminum-silicon coated products, the aluminum-silicon coating will inevitably stick to the ceramic roller; similarly, when producing zinc-based coated products, the coating will also stick to the roller. When aluminum-silicon coated products and zinc-based coated products are produced on the same line, it is inevitable that the galvanized aluminum-silicon coating will stick to the roller, resulting in granular sticky materials on the surface of the zinc-based coated products, which greatly affects the subsequent coating electrophoresis, etc.; and the aluminum-silicon coating will stick to the roller, resulting in golden and white dots on the surface of the aluminum-silicon coated products, which will corrode the aluminum-silicon coating and cause the product color difference to be too large. Figure 1-7 And Table 1-2.

[0011] This patent is based on the physical properties of the melting points of zinc-based and aluminum-silicon coated plates and the differences in alloying phase changes during the heating process. It adopts staggered heating technology and different forming methods to reduce the problem of coatings sticking to each other when the two coatings are produced on the same line. The core of this patent solution is to better solve the problem of zinc-based coatings sticking to aluminum-silicon and aluminum-silicon sticking to zinc by regulating the heating temperature distribution, heating time and forming method of aluminum-silicon and zinc-based coatings, thereby realizing the co-production of zinc-based and aluminum-silicon coated plates.

[0012] The present invention discloses a method for manufacturing parts of a non-stick coating roller produced by co-production of aluminum silicon plates and galvanized plates, which adopts the following technical scheme:

[0013] A method for manufacturing parts of non-stick rollers for coating produced on the same line of aluminum silicon plates and galvanized plates, comprising the following steps:

[0014] S1: cutting the material to obtain the sheet material;

[0015] S2: Heat treatment of the sheet metal in staggered or partitioned areas;

[0016] S3: hot pressing or hot bath stamping of sheets to obtain parts;

[0017] The step S2 includes four heating and heat preservation zones, namely the first heating and heat preservation zone, the second heating and heat preservation zone, the third heating and heat preservation zone, and the fourth heating and heat preservation zone;

[0018] The process parameters of the first heating and insulation zone are: heating and insulation temperature of the aluminum-silicon coating plate T 1Al-Si =550℃~870℃, heating time T1′ Al-Si =0.35τ; corresponding to the heating and insulation temperature of the zinc-based coating plate T 1Zn =300℃~450℃, heating time T1′ Zn =0.2τ;

[0019] The process parameters of the second heating and insulation zone are: heating and insulation temperature of the aluminum-silicon coating plate T 2Al-Si =870℃~900℃, heating time T2′ Al-Si =0.15τ; corresponding to the heating and insulation temperature of the zinc-based coating plate T 2Zn =450℃~700℃, heating time T2′ Zn =0.2τ;

[0020] The process parameters of the third heating and insulation zone are: heating and insulation temperature of aluminum silicon coating plate T 3Al-Si =900℃~930℃, heating time T3′ Al-Si =0.2τ; corresponding zinc-based plate heating and insulation temperature T 3Zn =700℃~880℃, heating time T3′ Zn =0.35τ;

[0021] The process parameters of the fourth heating and insulation zone are: heating and insulation temperature of aluminum silicon coating plate T 4Al-Si =930℃~950℃, heating time T4′ Al-Si =0.3τ; corresponding zinc-based plate heating and insulation temperature T 4Zn =880℃~910℃, heating time T4′ Zn =0.25τ;

[0022] The τ is the heating time (in seconds / s), and the calculation formula of τ is as follows:

[0023] Aluminum silicon coated plate: τ = T × 100 + 150 + μ;

[0024] Zinc-based plate: τ = t × 100 + 130 + μ;

[0025] In the above formula, t represents the material thickness (in millimeters / mm), and μ represents the coating quality influencing factor. The value of μ is as follows:

[0026] Aluminum-silicon coated plate: coating single-side mass ≤75g / m 2 When μ=20, the mass of the coating on one side is ≥85g / m 2 When μ=35, the mass of the coating on one side is between 75g / m 2 ~85g / m 2 When between, μ=28±2;

[0027] Zinc-based coated plate: coating weight on one side ≤ 75g / m 2 When μ=40, the mass of the coating on one side is ≥85g / m 2 When μ=65, the mass of the coating on one side is between 75g / m 2 ~85g / m 2 When , μ=50±3.

[0028] The problem of roller sticking in co-production is solved by adopting step-by-step staggered heating to achieve full alloying of the surface coating of aluminum-silicon plate and galvanized plate. At the same time, the advantage of higher cooling rate of hot bath stamping is fully utilized to ensure that the zinc-based plate parts produced meet the loading standards. Step-by-step staggered heating means producing aluminum-silicon plate first and then zinc-based plate, or producing zinc-based plate first and then aluminum-silicon plate. Different heat treatment processes and stamping methods are used for these two materials to fully utilize the alloying characteristics of the coating, reduce the amount of coating adhesion on the ceramic roller, and avoid roller sticking in the same area. The time required for heat treatment of the sheet in the roller bottom furnace is shortened, which greatly optimizes the production cycle.

[0029] Preferably, in step S3, the aluminum-silicon coated plate is formed by stamping using a hot stamping die.

[0030] Preferably, during the hot stamping operation of the aluminum-silicon plate, the cooling water temperature is 6°C to 10°C, the cooling rate v≥30°C / s, and the holding time satisfies T″ Al-Si ≥t×4+2, the part demoulding temperature is 150℃~250℃.

[0031] Preferably, in step S3, the zinc-based plate is formed by hot bath stamping using a hot bath mold.

[0032] Preferably, in the hot bath stamping operation of the zinc-based plate, only the upper die is passed through cooling water, the cooling water temperature is 6°C to 10°C, and the holding time meets T″ Zn ≥t×3+2.5, the heat bath temperature satisfies T 热浴 ≥100-9.5t, the pre-cooling medium is a water-oil mixture, and the part demoulding temperature is 80℃~200℃.

[0033] Preferably, the zinc-based plate includes but is not limited to any one of GI plate, GA plate and GL plate.

[0034] Preferably, the thickness of the aluminum silicon plate and the zinc-based plate is 1.0 mm to 2.0 mm. After the aluminum silicon and zinc-based plates of the same thickness are formed, the tensile strength and yield strength of the zinc-based plate parts are higher than those of the aluminum silicon plate.

[0035] Preferably, the aluminum-silicon coating does not need to be subsequently shot blasted, but the zinc-based coating needs to be shot blasted.

[0036] Compared with the prior art, the present invention has at least the following beneficial effects:

[0037] The present invention can effectively solve the problem of zinc-based plated plates and aluminum-silicon plated plates being mutually adhered to the rollers when they are produced on the same line, and obtain zinc-based plated plates without aluminum-silicon particles adhering to the rollers on the surface and aluminum-silicon plated parts without golden dots or white dots on the surface. At the same time, compared with the prior art, the present invention significantly shortens the heating time, optimizes the production cycle, does not require special coatings, and has lower production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 The aluminum-silicon coated plate of the comparative example has large-area adhesive roller galvanizing to produce white and golden dot-shaped areas;

[0039] Figure 2 The zinc-based plate of the comparative example is formed into particles by the aluminum silicon sticking to the roller;

[0040] Figure 3 The aluminum-silicon plate of the comparative example has white and golden dot-shaped sticky rollers;

[0041] Figure 4 for Figure 3 Microscopic morphology of area 1;

[0042] Figure 5 for Figure 3 Microscopic morphology of area 2;

[0043] Figure 6 for Figure 3 The microscopic morphology of area 3;

[0044] Figure 7 for Figure 3 The microscopic morphology of area 4;

[0045] Figure 8 The average thickness of the coating after the aluminum silicon parts of the comparative example are subjected to roller-sticky galvanizing corrosion;

[0046] Fig. 9 is the average thickness of the coating on the non-stick roller zinc-based coated aluminum silicon parts of the embodiment;

[0047] Fig.10 is the average thickness of the zinc-based plated parts coating of Example 1;

[0048] Figures 11 to 14 The micro-crack morphology and penetration depth of the zinc-based plated parts in Examples 1 to 4. DETAILED DESCRIPTION

[0049] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and implement it. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. It should be understood that the specific embodiments are only used to explain the present invention, but the embodiments are not intended to limit the present invention.

[0050] In the present invention, unless otherwise explained, technical and scientific terms used in the present invention have the same meanings as commonly understood by those skilled in the art to which the present invention belongs.

[0051] In the present invention, unless otherwise stated, when the terms "comprise" and / or "include" are used in the specification of the present invention, it indicates the existence of the described features, integers, steps, operations, but does not exclude the existence or addition of one or more other features, integers, steps, operations or their combinations.

[0052] In the present invention, unless otherwise specified, if no specific conditions are specified in the examples, the experiments were carried out according to conventional conditions or conditions recommended by the manufacturer.

[0053] Similar hot bath stamping processes in the following embodiments may refer to Chinese patents CN202111073382.7, CN202310195770.5 and other patents.

[0054] Example 1

[0055] The thickness of the aluminum silicon coating plate is 1.4 mm and the coating mass is 75 g / m 2 , that is, μ is taken as 20, and τ is calculated to be 329; the thickness of the zinc-based coating material is 1.2 mm, and the coating mass is 65 g / m 2 , that is, μ is taken as 40, and τ=290 is calculated; the heat treatment temperature and time from the first heating and holding zone to the fourth heating and holding zone are respectively:

[0056] Aluminum-silicon coated plate: Zone 1 (550℃~870℃, 108.5s), Zone 2 (870℃~900℃, 46.5s), Zone 3 (900℃~930℃, 62s), Zone 4 (930℃~950℃, 93s); holding time is 10s.

[0057] Zinc-based coated plate: Zone 1 (300℃~450℃, 58s), Zone 2 (450℃~700℃, 58s), Zone 3 (700℃~880℃, 101.5s), Zone 4 (880℃~910℃, 72.5s); hot bath temperature 90℃, holding time 7s.

[0058] Example 2

[0059] The thickness of the aluminum silicon coating plate is 1.2 mm and the coating mass is 90 g / m 2 , that is, μ is taken as 35, and τ is calculated to be 305; the thickness of the zinc-based coating material is 1.8 mm, and the coating mass is 65 g / m 2 , that is, μ is taken as 40, and τ=350 is calculated; the heat treatment temperature and time from the first heating and holding zone to the fourth heating and holding zone are respectively:

[0060] Aluminum-silicon coated plate: Zone 1 (550℃~870℃, 106.75s), Zone 2 (870℃~900℃, 45.75s), Zone 3 (900℃~930℃, 61s), Zone 4 (930℃~950℃, 91.5s); holding time is 8s.

[0061] Zinc-based coated plate: Zone 1 (300℃~450℃, 70s), Zone 2 (450℃~700℃, 70s), Zone 3 (700℃~880℃, 122.5s), Zone 4 (880℃~910℃, 87.5s); hot bath temperature 88℃, holding time 9s.

[0062] Example 3

[0063] The thickness of the aluminum silicon coating plate is 1.8 mm and the coating mass is 40 g / m 2 , that is, μ is taken as 20, and τ=350 is calculated; the thickness of the zinc-based coating material is 1.8 mm, and the coating mass is 65 g / m 2 , that is, μ is taken as 40, and τ=350 is calculated; the heat treatment temperature and time from the first heating and holding zone to the fourth heating and holding zone are respectively:

[0064] Aluminum-silicon coated plate: Zone 1 (550℃~870℃, 122.5s), Zone 2 (870℃~900℃, 52.5s), Zone 3 (900℃~930℃, 70s), Zone 4 (930℃~950℃, 105s); holding time is 10s.

[0065] Zinc-based coated plate: Zone 1 (300℃~450℃, 70s), Zone 2 (450℃~700℃, 70s), Zone 3 (700℃~880℃, 122.5s), Zone 4 (880℃~910℃, 87.5s); hot bath temperature 88℃, holding time 9s.

[0066] Example 4

[0067] The thickness of the aluminum silicon coating plate is 1.8 mm and the coating mass is 65 g / m 2 , that is, μ is taken as 20, and τ=350 is calculated; the thickness of the zinc-based coating material is 1.6 mm, and the coating mass is 85 g / m 2 , that is, μ is taken as 65, and τ=355 is calculated; the heat treatment temperature and time from the first heating and holding zone to the fourth heating and holding zone are respectively:

[0068] Aluminum-silicon coated plate: Zone 1 (550℃~870℃, 122.5s), Zone 2 (870℃~900℃, 52.5s), Zone 3 (900℃~930℃, 70s), Zone 4 (930℃~950℃, 105s); holding time is 10s.

[0069] Zinc-based coated plate: Zone 1 (300℃~450℃, 71s), Zone 2 (450℃~700℃, 71s), Zone 3 (700℃~880℃, 124.25s), Zone 4 (880℃~910℃, 88.75s); hot bath temperature 90℃, holding time 8s.

[0070] Comparative Example 1

[0071] The thickness of the aluminum silicon coating plate is 1.8 mm and the coating mass is 65 g / m 2 ; The thickness of the zinc-based plate material is 1.6mm, and the coating mass is 85g / m 2 ; The heat treatment temperature and time from the first heating and holding zone to the fourth heating and holding zone are respectively:

[0072] Aluminum-silicon coated plate: Zone 1 (750℃~810℃, 122.5s), Zone 2 (830℃~890℃, 52.5s), Zone 3 (900℃~930℃, 70s), Zone 4 (930℃, 105s); holding time is 10s.

[0073] Zinc-based coated plate: Zone 1 (730℃~810℃, 71s), Zone 2 (830℃~880℃, 71s), Zone 3 (880℃~890℃, 124.25s), Zone 4 (890℃~910℃, 88.75s); hot bath temperature 90℃, holding time 8s.

[0074] Comparative Example 2

[0075] The thickness of the aluminum silicon coating plate is 1.8 mm and the coating mass is 65 g / m 2 The thickness of the zinc-based plate is 1.6 mm, and the coating mass is 85 g / m 2 ; The heat treatment temperature and time from the first heating and holding zone to the fourth heating and holding zone are respectively:

[0076] Aluminum-silicon coated plate: Zone 1 (750℃~870℃, 100s), Zone 2 (870℃~900℃, 80s), Zone 3 (900℃~930℃, 70s), Zone 4 (930℃~950℃, 115s); holding time is 8s.

[0077] Zinc-based coated plate: Zone 1 (300℃~450℃, 71s), Zone 2 (450℃~700℃, 71s), Zone 3 (700℃~880℃, 124.25s), Zone 4 (880℃~910℃, 88.75s); hot bath temperature 50℃, holding time 4s.

[0078] Comparative Example 3

[0079] The thickness of the aluminum silicon coating plate is 1.8 mm and the coating mass is 65 g / m 2 The thickness of the zinc-based plate is 1.8 mm and the coating mass is 85 g / m 2 ; The heat treatment temperature and time from the first heating and holding zone to the fourth heating and holding zone are respectively:

[0080] Aluminum-silicon coated plate: Zone 1 (750℃~870℃, 100s), Zone 2 (870℃~900℃, 80s), Zone 3 (900℃~930℃, 70s), Zone 4 (930℃~950℃, 115s); holding time is 8s.

[0081] Zinc-based coated plate: Zone 1 (650℃~750℃, 80s), Zone 2 (750℃~850℃, 70s), Zone 3 (850℃~890℃, 80s), Zone 4 (890℃~900℃, 80s); hot bath temperature 60℃, holding time 5s.

[0082] Performance test data

[0083] The surface adhesion of the parts and components prepared in the above-mentioned embodiments and comparative examples was observed and the performance of the parts was tested. The results are recorded in Table 1-1 and Table 1-2.

[0084] Table 1-1 Surface sticking roller condition table and parts performance table of embodiment and comparative example

[0085]

[0086] Table 1-2 White and golden element contents on the surface of aluminum-silicon plate with roller galvanizing

[0087]

[0088]

[0089] As can be seen from Table 1-1, the surface sticking condition observation and part performance test results of the embodiment are significantly better than those of the comparative example. The manufacturing method of the present invention achieves a tensile strength of 1350MPa to 1650MPa after the aluminum-silicon plate and the zinc-based plate are heated and insulated in staggered steps, and then hot stamped and hot-bath stamped respectively, and the elongation is greater than 5%. There is no or only slight granular sticking, golden iron-aluminum alloy and zinc oxide white dot-shaped areas on the surface of the aluminum-silicon plate component. The thickness of the aluminum-silicon plate is controlled to be about 18μm. Figure 8-9 , the coating thickness of aluminum-silicon plate components is thicker. In addition, the thickness of the zinc-based plate after hot bath forming is controlled at about 25μm, and the microcracks in each part of the component are controlled within 5μm. Figure 10-14 .

[0090] When the aluminum-silicon plate and the zinc-based coated plate are produced on the same line by the present invention, a staggered stepped heating process for non-stick rollers and a matching hot bath process for zinc-based coated plates can be realized. According to the thickness of the two coating materials and the coating quality, a manufacturing method in which the process parameters such as the temperature of each heating and insulation zone, the heating time, the insulation time, the holding time and the like which can be industrially applied and can be obtained by adopting specific corresponding formulas is studied and proposed. The problem of zinc-based coated plates sticking to aluminum-silicon rollers and aluminum-silicon sticking to zinc-plating rollers can be better solved, thereby realizing the co-production of zinc-based coated plates and aluminum-silicon coated plates.

[0091] The technical solution provided by the present invention is introduced in detail above. Specific examples are used in this article to illustrate the principle and implementation mode of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation mode and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A method for manufacturing parts for non-stick rollers produced by co-production of aluminum silicon plates and galvanized plates, characterized in that: The following steps are involved: S1: cutting the material to obtain the sheet material; S2: Heat treatment of the sheet metal in staggered or partitioned areas; S3: hot pressing or hot bath stamping of sheets to obtain parts; The step S2 includes four heating and heat preservation zones, namely, a first heating and heat preservation zone, a second heating and heat preservation zone, a third heating and heat preservation zone, and a fourth heating and heat preservation zone; The process parameters of the first heating and insulation zone are: heating and insulation temperature of the aluminum-silicon coating plate T 1Al-Si =550℃~870℃, heating time T1′ Al-Si =0.35τ; corresponding to the heating and insulation temperature of the zinc-based coating plate T 1Zn =300℃~450℃, heating time T ′ ' Zn =0.2τ; The process parameters of the second heating and insulation zone are: heating and insulation temperature of the aluminum-silicon coating plate T 2Al-Si =870℃~900℃, heating time T2′ Al-Si =0.15τ; corresponding to the heating and insulation temperature of the zinc-based coating plate T 2Zn =450℃~700℃, heating time T2′ Zn =0.2τ; The process parameters of the third heating and insulation zone are: heating and insulation temperature of aluminum silicon coating plate T 3Al-Si =900℃~930℃, heating time T3′ Al-Si =0.2τ; corresponding heating and insulation temperature of zinc-based coating plate T 3Zn =700℃~880℃, heating time T3′ Zn =0.35τ; The process parameters of the fourth heating and insulation zone are: heating and insulation temperature of aluminum silicon coating plate T 4Al-Si =930℃~950℃, heating time T4′ Al-Si =0.3τ; corresponding zinc-based plate heating and insulation temperature T 4Zn =880℃~910℃, heating time T4′ Zn =0.25τ; The τ is the heating time (in seconds / s), and the calculation formula of τ is as follows: Aluminum silicon coated plate: τ = t × 100 + 150 + μ; Zinc-based plate: τ = t × 100 + 130 + μ; In the above formula, t represents the material thickness (in millimeters / mm), and μ represents the coating quality influencing factor. The value of μ is as follows: Aluminum-silicon coated plate: coating single-side mass ≤75g / m 2 When μ=20, the mass of the coating on one side is ≥85g / m 2 When μ=35, the mass of the coating on one side is between 75g / m 2 ~85g / m 2 When between, μ=28±2; Zinc-based coated plate: coating weight on one side ≤ 75g / m 2 When μ=40, the mass of the coating on one side is ≥85g / m 2 When μ=65, the mass of the coating on one side is between 75g / m 2 ~85g / m 2 When , μ=50±3.

2. The method for manufacturing parts of non-stick rollers for coating produced by co-production of aluminum-silicon plates and galvanized plates according to claim 1 is characterized in that: In the step S3, the aluminum-silicon coated plate is formed by stamping using a hot stamping die.

3. The method for manufacturing parts of non-stick rollers for coating produced by co-production of aluminum silicon plate and galvanized plate according to claim 2 is characterized in that: During the hot stamping operation of the aluminum-silicon plate, the holding time satisfies T″ Al-Si ≥t×4+2.

4. The method for manufacturing parts of non-stick rollers for coating produced on the same line of aluminum silicon plate and galvanized plate according to claim 2 is characterized in that: During the hot stamping operation of the aluminum-silicon coated plate, the cooling water temperature is 6°C to 10°C, the cooling rate v≥30°C / s, and the part ejection temperature is 150°C to 250°C.

5. The method for manufacturing parts of non-stick rollers for coating produced by co-production of aluminum silicon plate and galvanized plate according to claim 1 is characterized in that: In the step S3, the zinc-based plate is formed by hot bath stamping using a hot bath mold.

6. The method for manufacturing parts of non-stick rollers for coating produced on the same line of aluminum silicon plate and galvanized plate according to claim 5 is characterized in that: In the hot bath stamping operation of the zinc-based plate, the holding time satisfies T″ Zn ≥t×3+2.5, the heat bath temperature satisfies T 热浴 ≥100-9.5t.

7. The method for manufacturing parts of non-stick rollers for coating produced on the same line of aluminum silicon plate and galvanized plate according to claim 5, characterized in that: During the hot bath stamping operation of the zinc-based plate, only the upper die is passed through a cooling medium, the temperature of the cooling medium is 6°C to 10°C, and the part ejection temperature is 80°C to 200°C.

8. The method for manufacturing parts of non-stick rollers for coating produced by co-production of aluminum silicon plate and galvanized plate according to claim 1, characterized in that: The zinc-based plate is any one of a GI plate, a GA plate and a GL plate.

9. The method for manufacturing parts of non-stick rollers for producing aluminum silicon plates and galvanized plates on the same line according to claim 1, characterized in that: The thickness of the aluminum silicon coating plate material and the zinc-based coating plate material is 1.0 mm to 2.0 mm.

10. The method for manufacturing parts of non-stick rollers for coating produced on the same line of aluminum silicon plate and galvanized plate according to claim 1, characterized in that: The aluminum silicon coating is not subsequently subjected to shot blasting treatment, while the zinc-based coating plate is subsequently subjected to shot blasting treatment.

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