CN114669912A - Self-brazing composite alloy material for aluminum heat exchanger and intelligent preparation method thereof - Google Patents
Self-brazing composite alloy material for aluminum heat exchanger and intelligent preparation method thereof Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
- B23K35/362—Selection of compositions of fluxes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/40—Making wire or rods for soldering or welding
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Abstract
The invention provides a self-brazing composite alloy material for an aluminum heat exchanger and an intelligent preparation method thereof, wherein the method comprises the following steps: a core material; the self-brazing alloy powder layer is positioned between the core material and the Al-Si alloy plate and/or between the Al-Si alloy plate and the Al-Si alloy plate, and comprises Al-Si alloy powder and Nocolok brazing flux powder; the core material, the self-brazing alloy powder layer and the Al-Si alloy plate are compounded into a self-brazing composite alloy material through hot rolling. According to the invention, the self-brazing alloy powder is distributed among the Al-Si alloy plates, and the Al-Si alloy plates, the self-brazing alloy powder and the core material are rolled and formed in one step by a hot rolling composite process, so that the self-brazing alloy powder is prevented from directly contacting with a roller to stick to the roller, lubricating oil is prevented from directly contacting with the self-brazing alloy powder, and the roller can be rolled freely in a lubricating state; and the Al-Si alloy plate can prevent the self-brazing alloy powder from being exposed in the air and being oxidized, and the subsequent rolling and brazing effects are influenced.
Description
Technical Field
The invention relates to the technical field of alloy plate brazing, in particular to a self-brazing composite alloy material for an aluminum heat exchanger and an intelligent preparation method thereof.
Background
The brazing is a welding process that a metal material with a melting point lower than that of a base metal is used as a brazing filler metal, the base metal is wetted by the liquid brazing filler metal, a gap between a workpiece interface is filled, and the brazing filler metal and the base metal are mutually diffused. At present, the brazing filler metal used for brazing aluminum alloy is a noncorrosive brazing flux with the trade name of Nocolok. The soldering flux is a mixture of potassium fluoroaluminate with a general molecular formula of K1-3AlF4-6, and comprises the following components: 28-31% of K, 16-18% of Al, 49-53% of F, less than or equal to 0.03% of Fe, less than or equal to 0.02% of Ca and less than or equal to 2.5% of H2O; the powder is white powder, the melting temperature is 560-570 ℃, the bulk density at 20 ℃ is 450-600 kg/m3, and the density is 2.8g/cm 3.
In the aluminum alloy brazing process, the method of externally coating the brazing flux is divided into wet spraying and dry spraying according to the distribution range of brazing flux particles, and the dosage of the brazing flux is generally 5-10 g/m 2. When in use, the soldering flux is prepared into water suspension, then sprayed on a workpiece, dried and then put into a furnace for brazing. The process is efficient and continuous, and has been widely applied to the brazing of various aluminum heat exchangers. However, with the continuous pursuit of high efficiency, low consumption, high quality and environment friendliness in modern industrial production, the traditional external flux coating method has many problems, mainly including:
1) Before the brazing step, brazing flux is coated outside the surface of the welded part, and then heating and drying treatment are carried out, so that the process route is long;
2) the brazing flux particles are not uniform in size, so that the brazing flux sprayed on the surface of a weldment is not uniformly distributed, and the brazing quality is influenced;
3) in order to ensure that the brazing flux covers the whole heat exchanger, the brazing flux is generally coated excessively as much as possible, so that the brazing flux is wasted, and excessive brazing flux crystals exist on the surface of a brazed part, so that the appearance quality of a product is influenced, and the subsequent surface treatment of a weldment is also influenced;
4) after the soldering flux is sprayed, excessive soldering flux residues exist on the metal surface of the weldment, so that the service performance of a final product is influenced;
5) the flux is coated outside the surface mostly in a spraying mode, and powder and sewage in the production environment can cause environmental pollution and influence the physical and mental health of operators;
6) the process flow is long, so that the equipment investment is large, the production efficiency is reduced, and the final cost is increased.
Since the brazing method by coating flux has the above disadvantages, it is natural from the brazing method, that is, a method of previously placing flux in a brazing alloy. The piece is manufactured by spray forming, as described in patent CN 101674915 a. The molten brazing aluminum alloy is sprayed and solidified with brazing flux under certain conditions to form a casting blank, then the casting blank is subjected to hot extrusion to form a plate, the plate is spliced and then subjected to hot rolling and composite rolling with a core material, and the subsequent processes are the same as those of the traditional composite material production method. As also described in EP 0552567a1, the flux and Al — Si alloy powder are mixed together, the mixed powder is pressed into a shaped blank at a high temperature and pressure, and then the shaped blank is processed into a plate by hot extrusion, and then the plate is spliced and hot-rolled with a core material, and the subsequent processes are the same as those of the conventional composite material production method. This method has the same problems as the above spray forming, and also has the defects of serious oxidation of Al-Si alloy powder, uneven distribution of flux, etc., and is difficult to be used for the production of actual products.
The technical problem can be solved if the self-brazing alloy powder and the core material can be directly compounded, rolled and formed in one step. However, the conventional technology at present has the following technical difficulties in the direct one-step composite rolling forming of the self-brazing alloy powder and the core material:
1) during rolling, the self-brazing alloy powder can stick to the roller to cause rolling interruption;
2) if the roll is lubricated by lubricating oil, the lubricating oil can penetrate into the powder, so that the powder cannot be bonded, and the powder cannot be well deformed and bonded with the core material to form the composite plate.
Disclosure of Invention
The embodiment of the invention provides a self-brazing composite alloy material for an aluminum heat exchanger and an intelligent preparation method thereof, the production process flow is short, the investment is small, the cost is low, self-brazing alloy powder is directly compounded and rolled with a core material by taking an Al-Si alloy plate as a supporting carrier, the efficiency is high, the industrialization is easy, and the yield is high.
During rolling, the self-brazing alloy powder is isolated through the Al-Si alloy plate and cannot be in direct contact with the roller, the problem that the self-brazing alloy powder can stick to the roller to cause rolling interruption is further solved, lubricating oil at the roller is isolated by the Al-Si alloy plate, the lubricating oil at the roller cannot directly flow to the self-brazing alloy powder, the self-brazing alloy powder layer is more stable, and the self-brazing alloy powder can deform well to be bonded with the core material to form the composite plate.
In a first aspect of an embodiment of the present invention, there is provided a self-brazing composite alloy material for an aluminum heat exchanger, including:
a core material;
the self-brazing alloy powder layer is positioned between the core material and the Al-Si alloy plate and/or between the Al-Si alloy plate and the Al-Si alloy plate, and comprises Al-Si alloy powder and Nocolok brazing flux powder;
the core material, the self-brazing alloy powder layer and the Al-Si alloy plate are compounded into a self-brazing composite alloy material through hot rolling.
Optionally, in a possible implementation manner of the first aspect, the Nocolok flux powder content in the self-brazing alloy powder is 0.5 to 25% by mass, and the Nocolok flux powder is composed of the following raw materials by mass: k28-31%, Al 16-18%, F49-53%, Fe less than or equal to 0.03%, Ca less than or equal to 0.02%, H2O≤2.5％。
Optionally, in a possible implementation manner of the first aspect, the mass percentage of Si in each of the Al-Si alloy powder and the Al-Si alloy plate is 4-13%.
In a second aspect of the embodiments of the present invention, there is provided an intelligent manufacturing method for manufacturing the self-brazing composite alloy material for an aluminum heat exchanger according to the first aspect, including:
acquiring scene data input by a user, wherein the scene data at least comprises heat exchange scene information, applicable temperature information and quality intensity information;
Determining first quantity information and second quantity information of the Al-Si alloy plates hot-rolled at the upper surface and the lower surface of the core material based on the heat exchange scene information;
determining thickness information of the Al-Si alloy plate at the upper surface and the lower surface of the core material based on the applicable temperature information, and determining thickness information of a self-brazing alloy powder layer and proportion information of Si elements in the self-brazing alloy powder according to the thickness information of the Al-Si alloy plate;
correcting the first quantity information, the second quantity information, the thickness information of the Al-Si alloy plate, the thickness information of the self-brazing alloy powder layer and the proportion information of the Si element on the basis of the quality intensity information;
and selecting corresponding materials to generate the target self-brazing composite alloy material through hot rolling compounding based on the corrected first quantity information, second quantity information, thickness information of the Al-Si alloy plate, thickness information of the self-brazing alloy powder layer and proportion information of the Si element.
Optionally, in one possible implementation of the second aspect, determining the first quantity information and the second quantity information of the Al — Si alloy sheets hot-rolled at the upper surface and the lower surface of the core material based on the heat exchange scenario information includes:
The heat exchange scene information comprises the property of a heat conduction medium, the heat exchange length and the heat exchange width which are respectively contacted with the upper surface and the lower surface of the alloy material, and the property of the heat conduction medium comprises any one of gas or liquid;
if the heat transfer medium of the upper surface and the lower surface is a gas, the first quantity information and the second quantity information are calculated by the following formula,
wherein s is1Is a first quantity of information, s2As second quantity information, kQi (Qi)The weight value of the gas is set as the weight value of the gas,
first length weight value,/1For the length of the heat exchange,/Base ofA length reference value is set for each of the plurality of channels,
is a first width weight value, d1Is a first heat exchange width, dBase ofIs used as a width reference value and is used as a width reference value,
is a second length weight value, and is,
a second width weight value;
if the heat transfer medium of the upper surface and the lower surface is liquid, the first quantity information and the second quantity information are calculated by the following formula,
wherein k isLiquid for treating urinary tract infectionIs the liquid weight.
Optionally, in a possible implementation manner of the first aspect, the method further includes:
if the obtained first quantity information and/or second quantity information is not an integer, acquiring an integer which is larger than the first quantity information and/or second quantity information and is closest to the first quantity information and/or second quantity information as the adjusted first quantity information and/or second quantity information.
Optionally, in a possible implementation manner of the second aspect, the method further includes:
receiving third quantity information and/or fourth quantity information input by a user, wherein the third quantity information is the number of layers of the Al-Si alloy plate on the upper surface actually determined by the user, and the fourth quantity information is the number of layers of the Al-Si alloy plate on the lower surface actually determined by the user;
updating the gas weight value and/or the liquid weight value based on third quantity information and/or fourth quantity information input by a user;
the gas weight and/or liquid weight is updated by the following formula,
wherein, KQi (Qi)To updated gas weight, KLiquid for treating urinary tract infectionTo updated liquid weight, b1As gas renewal coefficient, c1For gas update of weight, b2For updating the coefficient for the liquid, c2The weight is updated for the liquid.
Optionally, in one possible implementation manner of the second aspect, determining thickness information of the Al — Si alloy plate at the upper surface and the lower surface of the core material based on the applicable temperature information, and determining thickness information of the self-brazing alloy powder layer and proportion information of the Si element in the self-brazing alloy powder according to the thickness information of the Al-Si alloy plate includes:
determining thickness information of the Al-Si alloy plate based on the upper temperature limit value and the lower temperature limit value included in the applicable temperature information, and determining thickness information of the self-brazing alloy powder layer and proportion information of Si elements in the self-brazing alloy powder according to the thickness information of the Al-Si alloy plate;
The thickness information of the Al-Si alloy plate, the thickness information of the self-brazing alloy powder layer and the proportion information of the Si element are calculated by the following formulas,
wherein h is1Is thickness information of Al-Si alloy plate, u temperature weighted value, i is temperature conversion value, c1Is an upper limit value of temperature, c2The lower limit value of the temperature is,
is a base thickness value, h, of the Al-Si alloy sheet2Z is the thickness information of the self-brazing alloy powder layer, a preset proportional value,
the thickness value is the basic thickness value of the self-brazing alloy powder layer, R is the proportion information of Si element in the self-brazing alloy powder layer, and R is the preset proportion information of the Si element in the self-brazing alloy powder layer.
Optionally, in one possible implementation manner of the second aspect, the correcting the first quantity information, the second quantity information, the thickness information of the Al-Si alloy plate, the thickness information of the self-brazing alloy powder layer, and the proportion information of the Si element based on the mass strength information includes:
presetting a quality intensity comparison table, wherein the quality intensity comparison table comprises a plurality of intensity threshold intervals and intensity coefficients corresponding to the intensity threshold intervals;
traversing an intensity threshold interval in a quality intensity comparison table, and acquiring an intensity threshold interval corresponding to the quality intensity information and a corresponding intensity coefficient;
Correcting the first quantity information, the second quantity information, the thickness information of the Al-Si alloy plate, the thickness information of the self-brazing alloy powder layer and the proportion information of the Si element on the basis of the strength coefficient;
the first quantity information, the second quantity information, the thickness information of the Al-Si alloy plate, the thickness information of the self-brazing alloy powder layer and the proportion information of the Si element are corrected by the following formulas,
wherein, y1For the corrected first quantity information, x1Is the first correction weight, X is the intensity coefficient, y2For the corrected second quantity information, x2Is the second modified weight, y3For thickness information of the corrected Al-Si alloy plate, x3Is the third correction weight, y4For thickness information of the corrected self-brazing alloy powder layer, x4Is the fourth correction weight, y5As corrected Si element ratio information, x5Is a fifth modified weight.
Optionally, in a possible implementation manner of the second aspect, the method further includes:
and generating a basic manufacturing table based on the corrected first quantity information, second quantity information, thickness information of the Al-Si alloy plate, thickness information of the self-brazing alloy powder layer and proportion information of the Si element, and displaying the basic manufacturing table.
In a third aspect of the embodiments of the present invention, a readable storage medium is provided, in which a computer program is stored, which, when being executed by a processor, is adapted to carry out the method according to the first aspect of the present invention and various possible designs of the first aspect of the present invention.
The invention provides a self-brazing composite alloy material for an aluminum heat exchanger and an intelligent preparation method thereof. The self-brazing alloy powder is distributed among the Al-Si alloy plates, and the Al-Si alloy plates, the self-brazing alloy powder and the core material are rolled and formed in one step through a hot rolling composite process, so that the self-brazing alloy powder is prevented from directly contacting with a roller to stick to the roller, lubricating oil is prevented from directly contacting with the self-brazing alloy powder, and the roller can be rolled freely in a lubricating state; and the Al-Si alloy plate can prevent the self-brazing alloy powder from being exposed in the air and being oxidized, and the subsequent rolling and brazing effects are influenced.
According to the technical scheme provided by the invention, the number of the Al-Si alloy plates hot-rolled on the upper surface and the lower surface of the core material can be obtained according to scene data input by a user, and is determined according to the property of the heat transfer medium respectively contacted with the upper surface and the lower surface of the alloy material, the heat exchange length and the heat exchange width, so that the number of the Al-Si alloy plates hot-rolled on the upper surface and the lower surface is suitable for the heat exchange scene of the material, and the stability of an aluminum heat exchanger made of the self-brazing composite alloy material in use is ensured. According to the technical scheme provided by the invention, different numbers of layer structures can be arranged according to different heat transfer media of the aluminum heat exchanger in the using process, so that the purpose and the effect of custom-producing the self-brazing composite alloy material according to an application scene are realized.
According to the technical scheme provided by the invention, the gas weight value and/or the liquid weight value can be updated according to the third quantity information and/or the fourth quantity information input by the user, so that the calculation formula and the algorithm provided by the invention can be continuously updated and iterated in an active learning manner, and the accuracy of the first quantity information and/or the second quantity information in the calculation process is further ensured.
According to the technical scheme provided by the invention, the thickness of the Al-Si alloy plate, the thickness of the self-brazing alloy powder layer and the proportion of Si elements can be determined according to different temperatures of a use scene, so that the self-brazing composite alloy material manufactured by the invention can ensure the stability at corresponding temperatures, the waste caused by excessive material use can be avoided on the premise of ensuring the stability of the aluminum heat exchanger manufactured by the invention, and the advantages and effects of energy conservation and emission reduction are achieved.
Drawings
FIG. 1A is a schematic layer structure diagram of a first embodiment of a self-brazing composite alloy material;
FIG. 1B is a cross-sectional view of the layer structure of the first embodiment of the self-brazing composite alloy material;
FIG. 1C is a schematic view of a layer structure of a second embodiment of a self-brazing composite alloy material;
FIG. 1D is a schematic layer structure diagram of a third embodiment of a self-brazing composite alloy material;
FIG. 1E is a schematic layer structure diagram of a fourth embodiment of a self-brazing composite alloy material;
FIG. 2A is a flow chart of a first embodiment of a smart manufacturing process;
fig. 2B is a flow chart of a second embodiment of an intelligent manufacturing process.
Reference numerals are as follows:
1. a core material; 2. an Al-Si alloy plate; 3. and self-brazing the alloy powder layer.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
The terms "first," "second," "third," "fourth," and the like in the description and in the claims, as well as in the drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein.
It should be understood that, in the various embodiments of the present invention, the sequence numbers of the processes do not mean the execution sequence, and the execution sequence of the processes should be determined by the functions and the internal logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.
It should be understood that in the present application, "comprising" and "having" and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements explicitly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It should be understood that, in the present invention, "a plurality" means two or more. "and/or" is only an association relationship describing an associated object, and means that there may be three relationships, for example, a and/or B, and may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "comprises A, B and C" and "comprises A, B, C" means that all three of A, B, C comprise, "comprises A, B or C" means that one of three of A, B, C are comprised, "comprises A, B and/or C" means that any 1 or any 2 or 3 of the three comprise A, B, C are comprised.
It should be understood that in the present invention, "B corresponding to a", "a corresponds to B", or "B corresponds to a" means that B is associated with a, and B can be determined from a. Determining B from a does not mean determining B from a alone, but may also be determined from a and/or other information. And the matching of A and B means that the similarity of A and B is greater than or equal to a preset threshold value.
As used herein, "if" may be interpreted as "at … …" or "at … …" or "in response to a determination" or "in response to a detection", depending on the context.
The technical means of the present invention will be described in detail with reference to specific examples. These several specific embodiments may be combined with each other below, and details of the same or similar concepts or processes may not be repeated in some embodiments.
The present invention provides a self-brazing composite alloy material for an aluminum heat exchanger, as shown in fig. 1A and 1B, comprising:
a core material;
a self-brazing alloy powder layer positioned between the core material and the Al-S i alloy plate and/or between the Al-S i alloy plate and the Al-Si alloy plate, wherein the self-brazing alloy powder layer comprises Al-Si alloy powder and Nocolok brazing flux powder;
the core material, the self-brazing alloy powder layer and the Al-Si alloy plate are compounded into the self-brazing composite alloy material through hot rolling.
The technical scheme provided by the invention comprises a core material and a self-brazing alloy layer directly compounded and rolled on the upper surface and/or the lower surface of the core material, wherein the self-brazing alloy layer comprises an Al-Si alloy plate and self-brazing alloy powder uniformly distributed between two adjacent Al-Si alloy plates, and the self-brazing alloy powder consists of Al-Si alloy powder and Nocolok brazing flux powder. The self-brazing composite alloy material is formed by directly hot rolling and compounding a self-brazing alloy layer and a core material.
Fig. 1 and 1B are only the first embodiment of the technical solution provided by the present invention in the implementation process.
In one possible embodiment, the content of the Nocolok brazing flux powder in the self-brazing alloy powder is 0.5-25% by mass, and the Nocolok brazing flux powder is composed of the following raw materials by mass: k28-31%, Al 16-18%, F49-53%, Fe not more than 0.03%, Ca not more than 0.02%, H2O≤2.5％。
In one possible embodiment, the mass percentage of Si in the Al-Si alloy powder and the Al-Si alloy sheet is 4 to 13%.
According to the invention, the self-brazing alloy powder is distributed in the middle of the Al-Si alloy plate, the self-brazing alloy powder and the core material are rolled and formed in one step by a hot rolling composite process, the self-brazing alloy powder is isolated from the roller by the Al-Si alloy plate, so that the self-brazing alloy powder is prevented from directly contacting with the roller to stick to the roller, lubricating oil is prevented from directly contacting with the self-brazing alloy powder, the roller can be rolled freely in a lubricating state, and the normal and continuous operation of a rolling process is ensured; and the Al-Si alloy plate can prevent the self-brazing alloy powder from being exposed in the air and being oxidized, and the subsequent rolling and brazing effects are influenced.
The total amount of flux, the total content of Si element in the self-brazing alloy powder is determined according to the thickness of the final product and the use conditions. (in the following example, products with thickness requirements in different occasions need to be taken as examples) when the total thickness required by the self-soldering alloy powder is large, the self-soldering alloy powder is divided into a plurality of layers according to the principle that the thickness of each layer of self-soldering alloy powder does not exceed 20mm, and the layers are separated by Al-Si alloy plates with the thickness not exceeding 10mm, so that the purpose of one-step rolling forming is achieved.
The method of the invention completely omits the procedures of external coating of the brazing flux and drying in the traditional brazing process, overcomes a series of technical defects of the traditional brazing process, reduces the equipment investment, greatly reduces the production cost, simultaneously improves the production efficiency and the brazing quality and improves the production environment of the product through the short-flow composite rolling processing process. In addition, the invention omits a plurality of complex procedures of the traditional process, has high yield and is easy for industrialization.
Generally, an aluminum heat exchanger comprises a radiator, an oil cooler, a condenser, an evaporator, a intercooler and the like, and can ensure brazing connection in inert gas or vacuum atmosphere without adding brazing flux additionally; the composite alloy material can be simultaneously suitable for vacuum brazing and protective gas atmosphere brazing, and the flexibility and the uniformity of the use of the material are improved; because the self-brazing alloy with the multilayer structure is adopted, the content of the brazing flux can be conveniently and flexibly adjusted in the manufacturing process, the brazing flux which is uniformly distributed in a proper amount can be fully utilized, the quality of a weldment is more reliable and stable, the brazing percent of pass is high, the surface of the weldment is bright and smooth, and the subsequent surface treatment is easy.
In general, the manufacture of the self-brazing composite alloy material provided by the present invention requires two steps, including:
step (1), self-brazing alloy layer preparation:
weighing Al-Si alloy powder and Nocolok brazing flux powder according to a formula, fully and uniformly mixing to obtain self-brazing alloy powder, and uniformly paving the self-brazing alloy powder between two adjacent layers of Al-Si alloy plates at normal temperature to obtain a brazing alloy layer;
step (2), hot rolling and compounding:
and (2) combining or welding and fixing the self-brazing alloy layer obtained in the step (1) with the core material ingot according to the single-sided or double-sided process requirements, then feeding the self-brazing alloy layer and the core material ingot into a heating furnace for heating, discharging the self-brazing alloy layer from the furnace after heating to a certain temperature, directly performing hot rolling and compounding, and finally rolling the self-brazing alloy layer and the core material ingot into a hot rolled coil with a certain thickness.
And (2) rolling the self-brazing alloy powder in the step (1) in a mould in advance to obtain a self-brazing alloy powder cake with a specified thickness, and placing the self-brazing alloy powder cake between two adjacent layers of Al-Si alloy plates.
In a second embodiment of the self-brazing composite alloy material, the structure may be as shown in FIG. 1C.
(1) Preparing self-brazing alloy powder:
the Nocolok brazing flux powder consists of the following raw materials in percentage by mass: 28 percent of K, 17 percent of Al, 53 percent of F, less than or equal to 0.03 percent of Fe, less than or equal to 0.02 percent of Ca and the balance of H 2O; and fully and uniformly mixing 0.5 mass percent of Nocolok brazing flux powder and 99.5 mass percent of Al-Si alloy powder containing 4 mass percent of Si to obtain self-brazing alloy powder 3.
Wherein the Al-Si alloy powder comprises the following components in percentage by mass:
| Al | Si | Fe | Cu | Mn | Mg | Ti | Zn |
| 95.779 | 4 | 0.15 | 0.003 | 0.05 | 0.001 | 0.002 | 0.015 |
(2) preparing a self-brazing alloy layer:
flatly paving the self-brazing alloy powder 3 obtained in the step (1) between three layers of Al-Si alloy plates 2 in two layers, wherein the thickness of each layer of self-brazing alloy powder 3 is 20 mm; each layer of Al-Si alloy plate 2 is 10mm thick to obtain a self-brazing alloy layer;
(3) casting the core material 1 by using a DC cast metal method, wherein in the embodiment, AA3003 series alloy is selected as the core material 1, and the alloy components can be correspondingly adjusted according to the final requirements of products; compounding the self-brazing alloy layer obtained in the step (2) with one surface of a core material 1 cast ingot with the thickness of 350mm, feeding the composite into a furnace, heating the composite to 490 ℃, and preserving heat for 2 hours;
(4) hot rolling and compounding: the thickness of the hot-rolled blank is 8 mm;
(5) cold rolling: cold rolling to 2.5mm after 3 passes;
(6) annealing of a finished product: the annealing temperature of the finished product is 380 ℃, the heat preservation time is 1.5 hours, the single-side composite self-brazing composite alloy material is obtained, and the single-side composite self-brazing composite alloy material is respectively brazed in vacuum brazing and nitrogen protective atmosphere, so that the brazing joint is full, and the surface is smooth and bright.
In a second embodiment of the self-brazing composite alloy material, the structure may be as shown in FIG. 1D.
(1) Preparing self-brazing alloy powder:
the Nocolok brazing flux powder consists of the following raw materials in percentage by mass: 31 percent of K, 18 percent of Al, 49 percent of F, less than or equal to 0.03 percent of Fe, less than or equal to 0.02 percent of Ca and the balance of H2O; and fully and uniformly mixing 10 mass percent of Nocolok brazing flux powder and 90 mass percent of Al-Si alloy powder containing 10.5 mass percent of Si to obtain self-brazing alloy powder 3.
Wherein the Al-Si alloy powder comprises the following components in percentage by mass:
| Al | Si | Fe | Cu | Mn | Mg | Ti | Zn |
| 89.279 | 10.5 | 0.15 | 0.003 | 0.05 | 0.001 | 0.002 | 0.015 |
(2) preparing a self-brazing alloy layer:
flatly paving the self-brazing alloy powder 3 obtained in the step (1) among four layers of Al-Si alloy plates 2 in three layers, wherein the thickness of each layer of self-brazing alloy powder 3 is 15 mm; the thickness of each layer of Al-Si alloy plate 2 is 5mm, and a self-brazing alloy layer is obtained;
(3) casting the core material 1 by using a DC cast metal method, wherein in the embodiment, AA3003 series alloy is selected as the core material 1, and the alloy components can be correspondingly adjusted according to the final requirements of products; compounding the self-brazing alloy layer obtained in the step (2) with one surface of a core material 1 cast ingot with the thickness of 440mm, feeding the composite ingot into a furnace, heating the composite ingot to 500 ℃, and preserving heat for 2 hours;
(4) hot rolling and compounding: the thickness of the hot-rolled blank is 8 mm;
(5) Cold rolling: cold rolling to 0.2mm after 7 passes;
(6) annealing of a finished product: the annealing temperature of the finished product is 400 ℃, the heat preservation time is 1.5 hours, the single-side composite self-brazing composite alloy material is obtained, and the single-side composite self-brazing composite alloy material is respectively brazed in vacuum brazing and nitrogen protective atmosphere, so that the brazing joint is full, and the surface is smooth and bright.
In a second embodiment of the self-brazing composite alloy material, the structure may be as shown in FIG. 1E.
(1) Preparing self-brazing alloy powder:
the Nocolok brazing flux powder consists of the following raw materials in percentage by mass: 30 percent of K, 18 percent of Al, 50 percent of F, less than or equal to 0.03 percent of Fe, less than or equal to 0.02 percent of Ca and the balance of H2O; 25 percent of Nocolok borerThe powder is fully and uniformly mixed with 75 mass percent of Al-Si alloy powder containing 13 mass percent of Si, and the mixture is pressed into powder cake in a die to obtain the self-brazing alloy powder cake 3.
Wherein the Al-Si alloy powder comprises the following components in percentage by mass:
| Al | Si | Fe | Cu | Mn | Mg | Ti | Zn |
| 86.842 | 13 | 0.11 | 0.003 | 0.03 | 0.001 | 0.002 | 0.012 |
(2) preparing a self-brazing alloy layer:
placing the self-brazing alloy powder cake 3 obtained in the step (1) between two layers of Al-Si alloy plates 2, wherein the thickness of the self-brazing alloy powder cake 3 is 10 mm; the thickness of each layer of Al-Si alloy plate 2 is 6mm, and a self-brazing alloy layer is obtained;
(3) casting the core material 1 by using a DC cast metal method, wherein in the embodiment, AA3003 series alloy is selected as the core material 1, and the alloy components can be correspondingly adjusted according to the final requirements of products; compounding the self-brazing alloy layer obtained in the step (2) with two surfaces of a core material 1 cast ingot with the thickness of 440mm, then heating the two surfaces to 500 ℃ in a furnace, and preserving heat for 2 hours;
(4) Hot rolling and compounding: the thickness of the hot-rolled blank is 8 mm;
(5) cold rolling: cold rolling to 0.6mm through 5 passes;
(6) annealing of a finished product: the annealing temperature of the finished product is 380 ℃, the heat preservation time is 1.5 hours, the self-brazing composite alloy material with double composite surfaces is obtained, and the self-brazing composite alloy material is respectively brazed in vacuum brazing and nitrogen protective atmosphere, so that the brazing joint is full, and the surface is smooth and bright.
The technical solution provided by the present invention further provides an intelligent preparation method for preparing the self-brazing composite alloy material for an aluminum heat exchanger, as shown in fig. 2A, including:
step S110, scene data input by a user are obtained, and the scene data at least comprise heat exchange scene information, applicable temperature information and quality intensity information. According to the technical scheme provided by the invention, a user can input corresponding scene data according to the actual use scene of the aluminum heat exchanger prepared according to the requirement.
Generally, in the aluminum heat exchanger, the heat exchange medium is generally classified into a liquid state or a gaseous state during use, and several forms of heat exchange may occur, such as liquid-to-liquid, gas-to-gas, gas-to-liquid, and the like. In the use process of different aluminum heat exchangers, the different scenes of the aluminum heat exchangers also cause different applicable temperature information, for example, the temperature of the aluminum heat exchanger in an air conditioner is generally below 100 ℃. However, in the scenario of flue gas heat recovery and the like, the temperature of the flue gas may be hundreds of degrees, so that the use temperature may be different in different use scenarios, and the possible uses of the heat exchanger are different, and when the heat exchanger is used as a home, the heat exchanger may be required to reach the national standard.
Therefore, the invention can receive the heat exchange scene information, the applicable temperature information and the quality intensity information which are actively input by the user through the interactive interface.
Step S120, determining first quantity information and second quantity information of the Al-Si alloy plates hot-rolled at the upper surface and the lower surface of the core material based on the heat exchange scene information. According to the technical scheme provided by the invention, the first quantity information and the second quantity information of the hot-rolled Al-Si alloy plate can be obtained according to the heat exchange scene information, the first quantity information and the second quantity information can be 0 or a plurality of information, when the first quantity information and the second quantity information are larger, it was confirmed that the more Al-Si alloy plates are present on the upper and lower surfaces of the core material, and in general, the more Al-Si alloy plates are present, the more stable the self-brazing composite alloy material is, and thus it is not easily damaged, but the material cost and manufacturing cost are increased accordingly, the present invention requires the first quantity information and the second quantity information of the Al-Si alloy plates to be determined according to the heat exchange scene information, on the premise of ensuring that the manufactured alloy is stable in a required scene, the material cost and the manufacturing cost are reduced, and benefit maximization is realized.
In the technical solution provided by the present invention, step S120 specifically includes:
the heat exchange scene information includes heat transfer medium properties, a heat exchange length and a heat exchange width, which are respectively contacted with the upper surface and the lower surface of the alloy material, and the heat transfer medium properties include any one of gas or liquid. For example, when industrial flue gas is subjected to heat recovery, the properties of the heat transfer media respectively contacting the upper surface and the lower surface of the heat exchange scene information at the time are respectively gas and liquid, that is, the upper surface of an aluminum heat exchanger made of a brazing composite alloy material contacts with the flue gas, and the lower surface of the aluminum heat exchanger contacts with heat transfer oil, generally speaking, the corrosivity of the flue gas is higher than that of the heat transfer oil. The heat exchange length and the heat exchange width can be determined according to the volume of the aluminum heat exchanger, and different industrial scales can have different specifications of the aluminum heat exchanger, so the heat exchange length and the heat exchange width are determined according to practical situations, and generally speaking, when the volume of the aluminum heat exchanger is larger, the force applied to the aluminum heat exchanger is larger, and the aluminum heat exchanger is relatively unstable.
If the heat transfer medium of the upper surface and the lower surface is a gas, the first quantity information and the second quantity information are calculated by the following formula,
Wherein s is1Is a first quantity of information, s2As second quantity information, kQi (Qi)The weight value of the gas is set as the weight value of the gas,
first length weight value,/1For the length of the heat exchange,/Base ofA length reference value is set for each of the plurality of channels,
is a first width weight value, d1Is a first heat exchange width, dBase ofIs used as a width reference value and is used as a width reference value,
is a second length weight value, and is,
a second width weight value;
if the heat transfer medium of the upper surface and the lower surface is liquid, the first quantity information and the second quantity information are calculated by the following formula,
wherein k isLiquid for treating urinary tract infectionIs the liquid weight.
The technical scheme provided by the invention is that the table is shown in the calculationWhen the first quantity information and the second quantity information of the surface and the lower surface are obtained, different calculation formulas and algorithms can be adopted according to different heat conduction media, the weight value of gas is generally larger than that of liquid, and the corrosivity of gas is higher than that of liquid. Taking the heat transfer medium on the upper and lower surfaces as a gas, the longer the length of the aluminum heat exchanger, the longer the aluminum heat exchanger is
The larger and
the larger, when the width of the aluminum heat exchanger is wider
And
the larger. First length weight value
Typically greater than the second length weight value
First width weighted value
Is typically greater than the second width weight value 
Since the aluminum heat exchanger is likely to be manufactured as a cylinder in the manufacturing process, the upper surface forms the outer surface of the cylinder, the lower surface forms the inner surface of the cylinder, the contact area of the outer surface is larger, and the requirement for extending the outer surface is higher in the manufacturing process, the corresponding weight needs to be increased to increase the corresponding first quantity information.
The technical scheme provided by the invention further comprises the following steps:
if the obtained first quantity information and/or the obtained second quantity information are not integers, the integers which are larger than the first quantity information and/or the second quantity information and are closest to the first quantity information and/or the second quantity information are obtained to be used as the adjusted first quantity information and/or the adjusted second quantity information. When the first quantity information and the second quantity information are calculated, the first quantity information and/or the second quantity information may not be integers, so the invention selects an integer which is larger than the first quantity information and/or the second quantity information and is closest to the first quantity information and/or the second quantity information as the adjusted first quantity information and/or the adjusted second quantity information, for example, if the first quantity information is 1.7, the adjusted first quantity information is 2. At this time, 2 Al-Si alloy sheets were present.
The technical scheme provided by the invention further comprises the following steps:
receiving third quantity information and/or fourth quantity information input by a user, wherein the third quantity information is the number of layers of the Al-Si alloy plate on the upper surface actually determined by the user, and the fourth quantity information is the number of layers of the Al-Si alloy plate on the lower surface actually determined by the user.
Updating the gas weight value and/or the liquid weight value based on third quantity information and/or fourth quantity information input by a user. According to the technical scheme provided by the invention, the first quantity information and/or the second quantity information of the upper surface and the lower surface are/is displayed through the display device, if the user thinks that the first quantity information and/or the second quantity information output at the moment are/is not suitable for the current scene, the user can actively input corresponding third quantity information and/or fourth quantity information at the moment, and the gas weight value and/or the liquid weight value are/is updated according to the relation between the corresponding third quantity information and/or fourth quantity information and the first quantity information and/or the second quantity information which are/is actively input by the user, so that the gas weight value and/or the liquid weight value which are/is more suitable for the current scene are/is obtained.
The gas weight and/or liquid weight is updated by the following formula,
Wherein, KQi (Qi)To updated gas weight, KLiquid for treating urinary tract infectionTo updated liquid weight, b1As gas renewal coefficient, c1For gas update of weight, b2For updating the coefficient for the liquid, c2The weight is updated for the liquid.
The technical scheme provided by the invention s1-s3、s2-s4The larger the difference between the first quantity information/the second quantity information calculated by the present invention and the first quantity information/the second quantity information input by the user is, the larger the difference is, so the updated gas weight value K is obtained at this timeQi (Qi)Weighted value k compared to gas before updateQi (Qi)The greater the change. Same principle s1-s3、s2-s4The larger the weight value K of the liquid after updatingLiquid for treating urinary tract infectionWeight value K compared with the liquid before updateLiquid for treating urinary tract infectionThe greater the change. Wherein the gas update weight and the liquid update weight are preferably odd numbers such that
And
and
and
the positive and negative values between the two are the same. And further, the purpose of updating the gas weight value and the liquid weight value according to the quantity relation between the first quantity information/the second quantity information and the third quantity information/the fourth quantity information is achieved.
And S130, determining thickness information of the Al-Si alloy plates at the upper surface and the lower surface of the core material based on the applicable temperature information, and determining thickness information of the self-brazing alloy powder layer and proportion information of Si elements in the self-brazing alloy powder according to the thickness information of the Al-Si alloy plates. According to the technical scheme provided by the invention, the thickness information of the Al-Si alloy plate at the upper surface and the lower surface of the core material is determined according to the using temperature information of the aluminum heat exchanger, the numerical value corresponding to the thickness information of the Al-Si alloy plate is larger when the using temperature information of the aluminum heat exchanger is higher, and the numerical value corresponding to the thickness information of the Al-Si alloy plate is smaller when the using temperature information of the aluminum heat exchanger is lower. The thickness information of the self-brazing alloy powder layer can be determined according to the thickness information of the Al-Si alloy plate, and when the thickness information of the Al-Si alloy plate is thicker, the required adhesive force between the Al-Si alloy plate and the core material, and between the Al-Si alloy plate and the Al-Si alloy plate is larger, and the thickness corresponding to the thickness information of the self-brazing alloy powder layer is thicker. The proportion of the Si element in the self-brazing alloy powder can reflect the adhesive force from the brazing alloy powder layer, and the larger the proportion of the Si element, the larger the adhesive force from the brazing alloy powder layer.
The thickness information of the Al-Si alloy plate on the upper surface and the lower surface of the core material can be determined according to the applicable temperature information, and generally, the higher the temperature is, the stronger the corrosiveness and the oxidizability of flue gas and liquid are, and the thicker the thickness corresponding to the thickness information of the Al-Si alloy plate is. When the thickness information of the Al-Si alloy plate is thicker, the required fixing force and the required adhesive force are larger, so that the thickness information of the corresponding self-brazing alloy powder layer and the proportion information of the Si element in the self-brazing alloy powder are larger, and the thickness of the Al-Si alloy plate, the thickness of the self-brazing alloy powder layer and the proportion of the Si element can be determined according to different temperature use scenes.
In the technical solution provided by the present invention, step S130 specifically includes:
and determining thickness information of the Al-Si alloy plate based on the upper temperature limit value and the lower temperature limit value which are included in the applicable temperature information, and determining thickness information of the self-brazing alloy powder layer and proportion information of Si elements in the self-brazing alloy powder according to the thickness information of the Al-Si alloy plate. For example, the self-brazing composite alloy material is suitable for a heat exchange scene of flue gas and heat conduction oil, when heat exchange is carried out, the highest temperature of the flue gas is 280 ℃, the lowest temperature of the heat conduction oil is 200 ℃, the upper limit value of the temperature is 280 ℃, and the lower limit value of the temperature is 200 ℃.
The thickness information of the Al-Si alloy plate, the thickness information of the self-brazing alloy powder layer and the proportion information of the Si element are calculated by the following formulas,
wherein h is1Is thickness information of Al-Si alloy plate, u temperature weighted value, i is temperature conversion value, c1Is an upper limit value of temperature, c2The lower limit value of the temperature is,
is a base thickness value, h, of the Al-Si alloy sheet2Z is the thickness information of the self-brazing alloy powder layer, a preset proportional value,
the thickness value is the basic thickness value of the self-brazing alloy powder layer, R is the proportion information of Si element in the self-brazing alloy powder layer, and R is the preset proportion information of the Si element in the self-brazing alloy powder layer.
By passing
An average temperature value between an upper temperature limit value and a lower temperature limit value can be obtained, a temperature conversion value i is used for converting the average temperature value so that the converted value can be used for calculating the thickness, a temperature weight value can be preset,
may be a constant value set in advance when
The larger the thickness information of the Al-Si alloy plate is, the larger the thickness information is. Since the thickness information of the self-brazing alloy powder layer is positively correlated with the thickness information of the Al-Si alloy plate, the thickness information of the self-brazing alloy powder layer increases as the thickness information of the Al-Si alloy plate increases, and the base thickness value of the self-brazing alloy powder layer increases 
Can be preset, the base thickness value
May be a minimum base value and the temperature weight value may be a value less than 1. By passing
The thickness information of the corresponding self-soldering alloy powder layer can be obtained, and the larger the thickness information of the self-soldering alloy powder layer is, the larger the annual requirement corresponding to the user is, so that the proportion of the Si element in the self-soldering alloy powder layer needs to be increased at this time, and the preset proportion information r of the Si element can be the minimum proportion of the Si element in the self-soldering alloy powder layer.
Through the technical scheme, the calculation can be sequentially carried out
According to the technical scheme provided by the invention, the thickness information of the Al-Si alloy plate, the thickness information of the self-brazing alloy powder layer and the proportion information of the Si element provide customized manufacture of the self-brazing composite alloy material for a user according to the use scene of the aluminum heat exchanger, and the material and manufacturing cost is reduced while the stability is ensured.
And S140, correcting the first quantity information, the second quantity information, the thickness information of the Al-Si alloy plate, the thickness information of the self-brazing alloy powder layer and the proportion information of the Si element based on the quality intensity information.
In the technical solution provided by the present invention, as shown in fig. 2B, step S140 specifically includes:
Step S1401, a quality intensity comparison table is preset, where the quality intensity comparison table includes a plurality of intensity threshold intervals and an intensity coefficient corresponding to each intensity threshold interval. The invention can preset a quality intensity comparison table, and the relation between the intensity threshold interval and the intensity coefficient is stored through the quality intensity comparison table. For example, in the quality intensity comparison table, the intensity threshold interval is 2 to 3, and the intensity coefficient corresponding to the intensity threshold interval is 1.2. The granularity of the intensity threshold interval can be set as required.
Step S1402, traversing the intensity threshold interval in the quality intensity comparison table, and acquiring the intensity threshold interval corresponding to the quality intensity information and the corresponding intensity coefficient. After receiving the quality intensity information input by the user, the intensity threshold interval in which the quality intensity information is located is determined, for example, if the quality intensity information input by the user is 2.1, the intensity threshold interval corresponding to the quality intensity information is 2 to 3, and the intensity coefficient is 1.2.
Step S1403, the first quantity information, the second quantity information, the thickness information of the Al — Si alloy plate, the thickness information of the self-brazing alloy powder layer, and the proportion information of the Si element are corrected based on the strength coefficient. After the strength coefficient is determined, the first quantity information, the second quantity information, the thickness information of the Al-Si alloy plate, the thickness information of the self-brazing alloy powder layer and the proportion information of the Si element are corrected according to the strength coefficient, and the larger the strength coefficient is, the higher the redundancy strength requirement of a user on the aluminum heat exchanger is, and the redundancy strength can be understood to be strength beyond the use scene of the aluminum heat exchanger.
The first quantity information, the second quantity information, the thickness information of the Al-Si alloy plate, the thickness information of the self-brazing alloy powder layer and the proportion information of the Si element are corrected by the following formulas,
wherein, y1For the corrected first quantity information, x1Is a first correction weight, X is an intensity coefficient, y2For the corrected second quantity information, x2Is the second modified weight, y3For thickness information of the corrected Al-Si alloy plate, x3Is the third correction weight, y4For thickness information of the corrected self-brazing alloy powder layer, x4Is the fourth correction weight, y5For the corrected Si element ratio information, x5Is a fifth modified weight. The first quantity information, the second quantity information, the thickness information of the Al-Si alloy plate, the thickness information of the self-soldering alloy powder layer and the proportion information of the Si element are corrected uniformly through the strength coefficient, and the first quantity information, the second quantity information, the thickness information of the Al-Si alloy plate, the thickness information of the self-soldering alloy powder layer and the proportion information of the Si element are different in unit, so that the first quantity information, the second quantity information, the thickness information of the Al-Si alloy plate, the thickness information of the self-soldering alloy powder layer and the proportion information of the Si element respectively have correction weights suitable for the first quantity information, the second quantity information, the thickness information of the Al-Si alloy plate, the thickness information of the self-soldering alloy powder layer and the proportion information of the Si element, and the correction weights can be preset.
Through the technical scheme, the first quantity information, the second quantity information, the thickness information of the Al-Si alloy plate, the thickness information of the self-brazing alloy powder layer and the proportion information of the Si element can be corrected, so that a user has appropriate indexes and data when manufacturing the self-brazing composite alloy material.
And S150, selecting corresponding materials to generate the target self-brazing composite alloy material through hot rolling compounding based on the corrected first quantity information, second quantity information, thickness information of the Al-Si alloy plate, thickness information of the self-brazing alloy powder layer and proportion information of the Si element.
In one possible embodiment, the method further comprises:
and generating a basic manufacturing table based on the corrected first quantity information, second quantity information, thickness information of the Al-Si alloy plate, thickness information of the self-brazing alloy powder layer and proportion information of the Si element, and displaying the basic manufacturing table.
The user can select corresponding materials to manufacture the self-brazing composite alloy material according to the basic manufacturing table, or select corresponding materials to manufacture the self-brazing composite alloy material in a production line mode, and the specific selection and manufacturing process is not limited in the invention.
The readable storage medium may be a computer storage medium or a communication medium. Communication media includes any medium that facilitates transfer of a computer program from one place to another. Computer storage media can be any available media that can be accessed by a general purpose or special purpose computer. For example, a readable storage medium is coupled to a processor such that the processor can read information from, and write information to, the readable storage medium. Of course, the readable storage medium may also be an integral part of the processor. The processor and the readable storage medium may reside in an Application Specific Integrated Circuits (ASIC). Additionally, the ASIC may reside in user equipment. Of course, the processor and the readable storage medium may also reside as discrete components in a communication device. The readable storage medium may be a read-only memory (ROM), a random-access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like.
The present invention also provides a program product comprising execution instructions stored in a readable storage medium. The at least one processor of the device may read the execution instructions from the readable storage medium, and the execution of the execution instructions by the at least one processor causes the device to implement the methods provided by the various embodiments described above.
In the above embodiments of the terminal or the server, it should be understood that the Processor may be a Central Processing Unit (CPU), other general-purpose processors, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of a method disclosed in connection with the present invention may be embodied directly in a hardware processor, or in a combination of the hardware and software modules within the processor.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A self-brazing composite alloy material for use in an aluminum heat exchanger, comprising:
a core material;
the self-brazing alloy powder layer is positioned between the core material and the Al-Si alloy plate and/or between the Al-Si alloy plate and the Al-Si alloy plate, and comprises Al-Si alloy powder and Nocolok brazing flux powder;
the core material, the self-brazing alloy powder layer and the Al-Si alloy plate are compounded into the self-brazing composite alloy material through hot rolling.
2. The self-brazing composite alloy material for an aluminum heat exchanger according to claim 1,
the content of the Nocolok brazing flux powder in the self-brazing alloy powder is 0.5-25% by mass, and the Nocolok brazing flux powder is composed of the following raw materials by mass: k28-31%, Al 16-18%, F49-53%, Fe not more than 0.03%, Ca not more than 0.02%, H2O≤2.5％。
3. The self-brazing composite alloy material for an aluminum heat exchanger according to claim 1,
the mass percent of Si in the Al-Si alloy powder and the Al-Si alloy plate is 4-13%.
4. An intelligent production method for producing the self-brazing composite alloy material for an aluminum heat exchanger according to any one of claims 1 to 3, comprising:
Acquiring scene data input by a user, wherein the scene data at least comprises heat exchange scene information, applicable temperature information and quality intensity information;
determining first quantity information and second quantity information of the Al-Si alloy plates hot-rolled at the upper surface and the lower surface of the core material based on the heat exchange scene information;
determining thickness information of the Al-Si alloy plates on the upper surface and the lower surface of the core material based on the applicable temperature information, and determining thickness information of the self-brazing alloy powder layer and proportion information of Si elements in the self-brazing alloy powder according to the thickness information of the Al-Si alloy plates;
correcting the first quantity information, the second quantity information, the thickness information of the Al-Si alloy plate, the thickness information of the self-brazing alloy powder layer and the proportion information of the Si element on the basis of the quality strength information;
and selecting corresponding materials to generate the target self-soldering composite alloy material through hot rolling compounding based on the corrected first quantity information, second quantity information, thickness information of the Al-Si alloy plate, thickness information of the self-soldering alloy powder layer and proportion information of the Si element.
5. The intelligent manufacturing method according to claim 4,
Determining first quantity information and second quantity information of the Al-Si alloy plates hot-rolled at the upper surface and the lower surface of the core material based on the heat exchange scenario information includes:
the heat exchange scene information comprises the property of a heat conduction medium, the heat exchange length and the heat exchange width which are respectively contacted with the upper surface and the lower surface of the alloy material, and the property of the heat conduction medium comprises any one of gas or liquid;
if the heat transfer medium of the upper surface and the lower surface is a gas, the first quantity information and the second quantity information are calculated by the following formula,
wherein s is1Is a first quantity of information, s2As second quantity information, kQi (Qi)The weight value of the gas is set as the weight value of the gas,
first length weight value,/1For the length of the heat exchange,/Base ofA length reference value is set for each of the plurality of channels,
is a first width weight value, d1Is a first heat exchange width, dBase ofIs used as a width reference value and is used as a width reference value,
is a second length weight value, and is,
a second width weight value;
if the heat transfer medium of the upper surface and the lower surface is liquid, the first quantity information and the second quantity information are calculated by the following formula,
wherein k isLiquid for treating urinary tract infectionIs the liquid weight.
6. The intelligent preparation method of claim 5, further comprising:
If the obtained first quantity information and/or the obtained second quantity information are not integers, the integers which are larger than the first quantity information and/or the second quantity information and are closest to the first quantity information and/or the second quantity information are obtained to be used as the adjusted first quantity information and/or the adjusted second quantity information.
7. The intelligent preparation method of claim 5, further comprising:
receiving third quantity information and/or fourth quantity information input by a user, wherein the third quantity information is the number of layers of the Al-Si alloy plate on the upper surface actually determined by the user, and the fourth quantity information is the number of layers of the Al-Si alloy plate on the lower surface actually determined by the user;
updating the gas weight value and/or the liquid weight value based on third quantity information and/or fourth quantity information input by a user;
the gas weight and/or liquid weight is updated by the following equations,
wherein, KQi (Qi)To updated gas weight, KLiquid for treating urinary tract infectionTo updated liquid weight, b1As gas renewal coefficient, c1For gas update of weight, b2For updating the coefficient for the liquid, c2The weight is updated for the liquid.
8. The intelligent production method according to claim 7,
Determining thickness information of the Al-Si alloy plate at the upper surface and the lower surface of the core material based on the applicable temperature information, and determining thickness information of the self-brazing alloy powder layer and proportion information of Si elements in the self-brazing alloy powder according to the thickness information of the Al-Si alloy plate comprises the following steps:
determining thickness information of the Al-Si alloy plate based on the upper temperature limit value and the lower temperature limit value included in the applicable temperature information, and determining thickness information of the self-brazing alloy powder layer and proportion information of Si elements in the self-brazing alloy powder according to the thickness information of the Al-Si alloy plate;
the thickness information of the Al-Si alloy plate, the thickness information of the self-brazing alloy powder layer and the proportion information of the Si element are calculated by the following formulas,
wherein h is1Is thickness information of Al-Si alloy plate, u temperature weighted value, i is temperature conversion value, c1Is an upper limit value of temperature, c2The lower limit value of the temperature is,
is a base thickness value, h, of the Al-Si alloy sheet2Z is the thickness information of the self-brazing alloy powder layer, a preset proportional value,
the thickness value is the basic thickness value of the self-brazing alloy powder layer, R is the proportion information of Si element in the self-brazing alloy powder layer, and R is the preset proportion information of the Si element in the self-brazing alloy powder layer.
9. The intelligent production method according to claim 8,
correcting the first quantity information, the second quantity information, the thickness information of the Al-Si alloy plate, the thickness information of the self-brazing alloy powder layer, and the proportion information of the Si element based on the mass intensity information includes:
presetting a quality intensity comparison table, wherein the quality intensity comparison table comprises a plurality of intensity threshold intervals and intensity coefficients corresponding to the intensity threshold intervals;
traversing an intensity threshold interval in a quality intensity comparison table, and acquiring an intensity threshold interval corresponding to the quality intensity information and a corresponding intensity coefficient;
correcting the first quantity information, the second quantity information, the thickness information of the Al-Si alloy plate, the thickness information of the self-brazing alloy powder layer and the proportion information of the Si element on the basis of the strength coefficient;
the first quantity information, the second quantity information, the thickness information of the Al-Si alloy plate, the thickness information of the self-brazing alloy powder layer and the proportion information of the Si element are corrected by the following formulas,
wherein, y1For the corrected first quantity information, x1Is a first correction weight, X is an intensity coefficient, y 2For the corrected second quantity information, x2Is the second modified weight, y3For thickness information of the corrected Al-Si alloy plate, x3As a third correction weight, y4For thickness information of the corrected self-brazing alloy powder layer, x4Is the fourth correction weight, y5For the corrected Si element ratio information, x5Is a fifth modified weight.
10. The intelligent preparation method of claim 4, further comprising:
and generating a basic manufacturing table based on the corrected first quantity information, second quantity information, thickness information of the Al-Si alloy plate, thickness information of the self-brazing alloy powder layer and proportion information of the Si element, and displaying the basic manufacturing table.
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| CN116024449A (en) * | 2022-12-14 | 2023-04-28 | 中国石油大学(北京) | Preparation method of functionally graded shape memory alloy |
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| CN114669912B (en) | 2023-03-28 |
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