Aviation additive manufacturing titanium alloy life cycle carbon footprint evaluation method and system and application

Abstract

The invention relates to the field of titanium alloy part laser additive manufacturing and life cycle evaluation, and provides an aviation additive manufacturing titanium alloy life cycle carbon footprint evaluation method and system and application, and the method comprises the steps: S1, carrying out life cycle stage division on an aviation additive manufacturing titanium alloy; s2, constructing a material flow and an energy flow of each life cycle stage; s3, constructing a carbon emission calculation model of each life cycle stage according to the life cycle stage division, the material flow and the energy flow; and S4, according to the carbon emission calculation model, performing quantification to obtain carbon emission data of each life cycle stage. According to the method, the carbon footprint in the titanium alloy additive manufacturing process can be accurately evaluated, life cycle environment indexes of all stages of product production and manufacturing can be mastered, the high-carbon emission link can be recognized, and a scientific basis is provided for optimizing the process and reducing the environmental influence.

Description

Technical Field

[0001] The present invention relates to the fields of laser additive manufacturing of titanium alloy parts and life cycle assessment, and particularly relates to a method, system and application for evaluating the carbon footprint of the life cycle of titanium alloy for aviation additive manufacturing. Background Art

[0002] Compared with fields such as energy, chemical industry, and iron and steel with relatively large emissions, carbon emissions in the aviation field have two typical characteristics: rapid growth rate and across countries. In the case of rapid growth of carbon emissions and difficulty in reaching the peak in the short term, it is very difficult for the aviation industry to reduce emissions, and effective measures are urgently needed to delay the growth of carbon emissions.

[0003] In the green transformation of the aviation industry, green, low-carbon and high-efficiency have become the inevitable choices for the development of the civil aviation industry. In addition to the application path of green energy, planning green and low-carbon technology paths around the core links of the aviation manufacturing industry is also an important part. For the application of green materials, green processes, etc., what is their carbon emission reduction potential? It is urgent to establish a set of life cycle environmental impact assessment methods for measurement and evaluation.

[0004] In the aviation field, especially in the direction of additive manufacturing, which is completely different from the traditional subtractive process, there is still no output evaluation method for the environmental load according to materials and production processes, and it remains blank. Summary of the Invention

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art, and provides a method, system and application for evaluating the carbon footprint of the life cycle of titanium alloy for aviation additive manufacturing. By conducting a full life cycle assessment on titanium alloy products prepared by selective laser melting technology, the carbon footprint per ton of products is obtained, which is used for the full life cycle carbon footprint management and green evaluation of new materials and new processes in the civil aviation field.

[0006] The present invention adopts the following technical solutions:

[0007] On the one hand, the present invention provides a method for evaluating the carbon footprint of the life cycle of titanium alloy for aviation additive manufacturing, including:

[0008] S1. Divide the life cycle stages of titanium alloy for aviation additive manufacturing;

[0009] S2. Construct the material flow and energy flow of each life cycle stage obtained in step S1; the material flow refers to the consumed raw materials and auxiliary materials, and the energy flow refers to the consumed different fuels or electricity;

[0010] S3. According to the life cycle stage division and the material flow and energy flow obtained in step S2, construct a carbon emission calculation model for each life cycle stage;

[0011] S4. Based on the carbon emission calculation model, quantify the carbon emission data of each life cycle stage.

[0012] For any of the possible implementation manners described above, a further implementation manner is provided. In step S1, the life cycle stage includes a raw material extraction stage, a manufacturing and processing stage, a use, maintenance and end-of-life recycling stage.

[0013] For any of the possible implementation manners described above, a further implementation manner is provided. The raw material extraction stage includes: mining of titanium powder, adding recycled metal for metallurgy, and making powder by electrode induction melting atomization;

[0014] The manufacturing and processing stage includes: screening powder, drying powder, part preparation, post-processing of parts, part inspection, and installation and application;

[0015] The use, maintenance and end-of-life recycling stage includes: the use and maintenance process of the prepared titanium alloy product, and the end-of-life scrapping and recycling process.

[0016] For any of the possible implementation manners described above, a further implementation manner is provided. The specific method of step S2 is:

[0017] S21. Divide according to the above life cycle stages into several list analysis units convenient for analysis, and collect the material data, energy data, and emission data involved in each list analysis unit;

[0018] S22. Determine the material flow and energy flow of each list analysis unit;

[0019] S23. Establish the correlation relationship between the material flow and the energy flow, and calculate the input data and output data lists of each list analysis unit based on the functional unit.

[0020] In this application, the material flow and the energy flow are considered separately, which can more accurately track and calculate the carbon footprint. The list analysis unit is smaller than the division of the life cycle stage. For example, the manufacturing and processing stage of the life cycle includes: screening powder, drying powder, part preparation, post-processing of parts, part inspection, and installation and application; taking screening powder, drying powder, etc. as separate list analysis units is more conducive to statistics and carbon footprint calculation.

[0021] For any of the possible implementation manners described above, a further implementation manner is provided. In step S21, the material data includes main raw material data and auxiliary raw material data, specifically the data of alloy powder (titanium, aluminum and vanadium), argon, substrate, personal protective equipment, and equipment consumables; the transportation data includes the transportation of main raw materials, auxiliary raw materials and energy; the emission data includes solid waste, atmospheric emissions and water emissions.

[0022] For any of the possible implementation manners described above, a further implementation manner is provided. Step S3 is specifically:

[0023] S31. Identify the carbon emission sources in each life cycle stage according to the above-mentioned life cycle stage division.

[0024] S32. Construct a carbon footprint calculation model consisting of main raw materials, auxiliary raw materials, energy and water in the production process, product transportation process, and product production process by means of the correlation between the material flow and energy flow of each of the above-mentioned inventory analysis units.

[0025] For any of the above possible implementation manners, a further implementation manner is provided. In step S32, the carbon footprint calculation model is as follows:

[0026]

[0027] In the formula: GHG - the carbon footprint of the titanium alloy product for aviation, t CO2e / t (tons of carbon dioxide equivalent per ton of titanium alloy product); GHG resou - the total greenhouse gas emissions in the production process of main raw materials and auxiliary raw materials, tCO2e (tons of carbon dioxide equivalent); GHG ener - the total greenhouse gas emissions generated in the production process of energy and water, tCO2e; GHG tran - the total greenhouse gas emissions in the product transportation process, tCO2e; GHG prod - the total greenhouse gas emissions generated in the product production, tCO2e; P - the output of qualified products, t (tons);

[0028] Among them:

[0029]

[0030] In the formula: GHG resou - the total greenhouse gas emissions in the production process of main raw materials and auxiliary raw materials, tCO2e;

[0031] Q i - the consumption of the i-th type of raw material, t (tons); F GHG,i - the carbon emission factor of the i-th type of raw material, t CO2e / t (tons of carbon dioxide equivalent per ton);

[0032]

[0033] In the formula: GHG ener - the total greenhouse gas emissions generated in the production process of energy and water, tCO2e; E i - the consumption of the i-th type of energy or water, including fossil energy and electricity, etc., t (tons) or kWh (kilowatt-hours); R GHG,i——Carbon emission factor of the i-th type of energy or water, tCO2e / t (ton of carbon dioxide equivalent per ton) or tCO2e / kWh

[0036] (ton of carbon dioxide equivalent per kilowatt-hour);

[0037]

[0038] In the formula: GHG tran ——Total greenhouse gas emissions during product transportation, tCO2e; Q i,j ——Total amount of the i-th substance transported by the j-th transportation mode, t; D i,j ——Transportation distance of the i-th substance by the j-th transportation mode, km; C GHG,j ——Carbon emission factor of the j-th different transportation mode, tCO2e / t·km;

[0039]

[0040] In the formula: GHG prod ——Total greenhouse gas emissions generated during product production, tCO2e; E' i ——Consumption of the i-th type of fossil fuel, in t for solid or liquid fuels and in 10,000 Nm 3 for gaseous fuels; NCV——Lower calorific value of the i-th fossil fuel, in GJ / t for solid or liquid fuels and in GJ / 10,000 Nm 3 for gaseous fuels; CC i ——Carbon content per unit calorific value of the i-th fossil fuel, in tC / GJ for solid or liquid fuels and in tC / 10,000 Nm 3 for gaseous fuels; OF i ——Carbon oxidation rate of the i-th fossil fuel, %.

[0041] On the other hand, the present invention also provides an evaluation system for the life cycle carbon footprint of titanium alloy by aviation additive manufacturing. The system is used to implement the above method, and the system includes:

[0042] Life cycle stage division unit, used for dividing the life cycle stages of titanium alloy by aviation additive manufacturing;

[0043] Material flow and energy flow construction and calculation unit, used for constructing and calculating the material flow and energy flow of each life cycle stage;

[0044] Carbon emission calculation unit, used for constructing a carbon emission calculation model for each life cycle stage and calculating the carbon emission data of each life cycle stage of titanium alloy by aviation additive manufacturing.

[0045] On the other hand, the present invention also provides an application of a method for evaluating the life cycle carbon footprint of titanium alloys in aviation additive manufacturing. Using the above method, the life cycle carbon footprint of titanium alloys in aviation additive manufacturing is calculated to identify high-carbon emission links and factors, and process optimization is carried out on these high-carbon emission links and factors.

[0046] On the other hand, the present invention also provides an application of a method for evaluating the life cycle carbon footprint of titanium alloys in aviation additive manufacturing. Using the above method, the life cycle carbon footprints of titanium alloys in aviation additive manufacturing with different process flows are calculated respectively, the carbon emission data of different process flows are compared, and the environmental friendliness of different process flows is evaluated.

[0047] The beneficial effects of the present invention are as follows:

[0048] 1. The present invention provides a life cycle carbon footprint evaluation model and method applicable to the preparation of titanium alloy parts by selective laser melting technology, including the definition of the whole life cycle of additive manufacturing titanium alloy products, the identification and collection of data lists for each link in the life cycle, the establishment of a life cycle carbon footprint calculation model, and emission reduction analysis.

[0049] 2. The present invention divides the whole life cycle stage of the product into several list analysis units for easy analysis; collects data such as energy, materials, products, and emissions involved in the unit; determines appropriate material flows and energy flows for each unit process, establishes an association relationship between the material flows and energy flows of all unit processes, and calculates the input and output data lists of each unit process based on the functional unit. It can quickly and accurately calculate the life cycle carbon footprint of titanium alloy parts prepared by selective laser melting technology, help quickly find out the key factors and links of carbon emissions, and provide targeted guidance for the sustainable development of additive manufacturing.

[0050] 3. The present invention provides a method for evaluating the life cycle carbon footprint of titanium alloys in aviation additive manufacturing. This method can not only accurately evaluate the carbon footprint in the process of titanium alloy additive manufacturing, master the life cycle environmental indicators (mainly carbon footprint) at each stage of product production and manufacturing, but also identify high-carbon emission links, providing a scientific basis for optimizing processes and reducing environmental impacts; reviewing the product system from the perspective of green and low-carbon, identifying the comprehensive environmental impacts of the product production system, providing support for the green manufacturing of aviation carbon alloys, and providing a scientific basis for enterprise environmental decision-making. Externally, it can provide life cycle environmental information of products to aviation industry customers and stakeholders, promoting the low-carbon and green transformation of products. Brief Description of the Drawings

[0051] Figure 1 The following shows a schematic flow chart of implementing a method for evaluating the life cycle carbon footprint of titanium alloys in aviation additive manufacturing by the present invention.

[0052] Figure 2It belongs to the schematic diagram of the life cycle stage boundary of titanium alloy for aviation additive manufacturing in the embodiment. Specific implementation manners

[0053] The specific embodiments of the present invention will be described in detail below with reference to the specific drawings. It should be noted that the technical features or combinations of technical features described in the following embodiments should not be considered as isolated, and they can be combined with each other to achieve better technical effects.

[0054] As Figure 1 shown, an evaluation method for the life cycle carbon footprint of titanium alloy for aviation additive manufacturing in an embodiment of the present invention includes:

[0055] S1. Divide the life cycle stages of titanium alloy for aviation additive manufacturing;

[0056] S2. Construct the material flow and energy flow of each life cycle stage obtained in step S1;

[0057] S3. According to the life cycle stage division and the material flow and energy flow obtained in step S2, construct a carbon emission calculation model for each life cycle stage;

[0058] S4. Quantify the carbon emission data of each life cycle stage according to the carbon emission calculation model.

[0059] In a specific embodiment, in step S1, the life cycle stages include a raw material extraction stage, a manufacturing and processing stage, and a use, maintenance, and end-of-life recycling stage.

[0060] In a specific embodiment, the raw material extraction stage includes: mining of titanium powder in a mine, adding recycled metal for metallurgy, and making powder by electrode induction melting;

[0061] The manufacturing and processing stage includes: sieving powder, drying powder, part preparation, post-processing of parts, part inspection, and installation and application;

[0062] The use, maintenance, and end-of-life recycling stage includes: the use and maintenance process of the prepared titanium alloy product, and the end-of-life scrapping and recycling process after the service life ends.

[0063] In a specific embodiment, the specific method of step S2 is:

[0064] S21. Divide each life cycle stage into several inventory analysis units for easy analysis, and collect data on materials and energy involved in each inventory analysis unit, specifically including data on main raw materials and auxiliary raw materials, energy data in the production and transportation processes, and emission data involved;

[0065] S22. Determine the material flow and energy flow of each inventory analysis unit;

[0066] S23. Establish the correlation between the material flow and the energy flow of the inventory analysis unit, and calculate the input data and output data inventory of each inventory analysis unit based on the functional unit (the functional unit refers to 1 ton of titanium alloy products).

[0067] In a specific embodiment, in step S21, the data of the main raw materials and auxiliary raw materials are specifically the data of alloy powder (titanium, aluminum and vanadium), argon, substrate, personal protective equipment and equipment consumables; the transportation data includes the transportation volume of the main raw materials, auxiliary raw materials and energy; the emission data includes solid waste, atmospheric emissions and water emissions.

[0068] In a specific embodiment, step S3 is specifically as follows:

[0069] S31. Identify the carbon emission sources in each life cycle stage according to the life cycle stage division.

[0070] S32. Construct a carbon footprint calculation model composed of the main raw materials and auxiliary raw materials, energy and water in the production process, product transportation process and product production process through the correlation between the material flow and the energy flow of each inventory analysis unit. The correlation between the material flow and the energy flow of each inventory analysis unit is reflected by the input and output of each inventory analysis unit.

[0071] In a specific embodiment, in step S32, the carbon footprint calculation model is:

[0072]

[0073] In the formula: GHG - carbon footprint of titanium alloy products for aviation, t CO2e / t; GHG resou - total greenhouse gas emissions in the production process of main raw materials and auxiliary raw materials, tCO2e; GHG ener - total greenhouse gas emissions generated in the production process of energy and water, tCO2e; GHG tran - total greenhouse gas emissions in the product transportation process, tCO2e; GHG prod - total greenhouse gas emissions generated in product production, tCO2e; P - output of qualified products, t;

[0074] Wherein:

[0075]

[0076] In the formula: GHG resou - total greenhouse gas emissions in the production process of main raw materials and auxiliary raw materials, tCO2e; Q i—— Consumption of the i-th type of raw material, t; F GHG,i —— Carbon emission factor of the i-th type of raw material, t CO2e / t;

[0078]

[0079] In the formula: GHG ener —— Total greenhouse gas emissions generated during the production of energy and water, tCO2e; E i —— Consumption of the i-th type of energy or water, including fossil energy and electricity, etc., t or kWh; R GHG,i —— Carbon emission factor of the i-th type of energy or water, tCO2e / t or tCO2e / kWh;

[0081]

[0082] In the formula: GHG tran —— Total greenhouse gas emissions during the transportation of the product, tCO2e; Q i,j —— Total amount of the i-th substance transported by the j-th transportation method, t; D i,j —— Transportation distance of the i-th substance by the j-th transportation method, km; C GHG,j —— Carbon emission factor of the j-th different transportation method, tCO2e / t·km;

[0083]

[0084] In the formula: GHG prod —— Total greenhouse gas emissions generated during the production of the product, tCO2e; E' i —— Consumption of the i-th type of fossil fuel, in t for solid or liquid fuels and in 10,000 Nm 3 for gaseous fuels; NCV—— Net calorific value of the i-th type of fossil fuel, in GJ / t for solid or liquid fuels and in GJ / 10,000 Nm 3 for gaseous fuels; CC i —— Carbon content per unit calorific value of the i-th type of fossil fuel, in tC / GJ for solid or liquid fuels and in tC / 10,000 Nm 3 for gaseous fuels; OF i —— Carbon oxidation rate of the i-th type of fossil fuel, %.

[0085] In an embodiment of the present invention, a carbon footprint evaluation system for additive manufacturing of titanium alloy in aviation, the system is used to implement the above method, and the system includes:

[0086] A life cycle stage division unit for dividing the life cycle stages of additive manufacturing of titanium alloy in aviation;

[0087] A material flow and energy flow construction calculation unit is used to construct and calculate the material flow and energy flow in each life cycle stage;

[0088] A carbon emission calculation unit is used to construct a carbon emission calculation model for each life cycle stage and calculate the carbon emission data of titanium alloy for aviation additive manufacturing in each life cycle stage.

[0089] An application of a method for evaluating the life cycle carbon footprint of titanium alloy for aviation additive manufacturing according to an embodiment of the present invention uses the above method to calculate the life cycle carbon footprint of titanium alloy for aviation additive manufacturing, identify high carbon emission links and factors, and optimize the processes for the high carbon emission links and factors.

[0090] An application of a method for evaluating the life cycle carbon footprint of titanium alloy for aviation additive manufacturing according to an embodiment of the present invention uses the above method to calculate the life cycle carbon footprints of titanium alloy for aviation additive manufacturing with different process flows respectively, compare the carbon emission data of different process flows, and evaluate the environmental friendliness of different process flows.

[0091] Embodiment

[0092] Combined with the actual process of preparing titanium alloy parts by laser cladding technology, taking 1t of "TC4" aviation additive titanium alloy products as an example, the full life cycle carbon footprint evaluation method is applied, and the implementation steps are as follows:

[0093] 1) Define the goal and scope

[0094] The product description enables users to clearly identify the product. The aviation additive titanium alloy products are described according to the requirements specified in ISO 14067 or other applicable standards, and different types of aviation additive titanium alloys are described independently. The determination of the carbon footprint functional unit of aviation additive titanium alloy takes into account its actual application scenario. Based on the information shown in Table 1, 1 ton of aviation additive titanium alloy products can be used as the functional unit for its carbon footprint research.

[0095] The description of aviation additive titanium alloy products includes but is not limited to the information shown in Table 1:

[0096] Table 1 Description of aviation additive titanium alloy products

[0097]

[0098] 2) Determine the system boundary

[0099] The life cycle process of aviation additive manufacturing titanium alloy is divided into several unit processes convenient for inventory analysis, the production system is divided into an energy system and a main production system, and the boundary of the life cycle includes raw material and energy acquisition, transportation and product production stages. The life cycle stage boundary is as Figure 2 shown.

[0100] a) The main raw materials include: TC4 alloy powder (titanium, aluminum, and vanadium). The production of titanium powder involves mining - metallurgy with recycled metals - atomization by an electrode inductor (furnace - atomization - cooling and solidification - collection) to produce the powder.

[0101] b) The production of auxiliary raw materials: includes argon, substrates, personal protective equipment, equipment consumables, etc. Argon is produced through gas liquefaction and separation - cryogenic distillation - condensation evaporation - fractionation tower separation - argon purification; the printing substrate is made by forging titanium alloy technology; personal protective equipment (such as gloves, protective clothing, shoe covers, etc.) is made through fiber synthesis - fabric weaving - cutting - sewing and assembly.

[0102] c) The production of energy and water: includes electricity, compressed air, and cooling water.

[0103] Transportation: includes the transportation processes of the above - mentioned main raw materials, auxiliary raw materials, and energy; TC4 alloy powder, titanium alloy substrates, argon cylinders, personal protective equipment, and equipment consumables are all transported by land to the places of use.

[0104] d) Product production: The processes covered in the production of titanium alloy products by aerospace additive manufacturing are powder screening - drying the powder - part preparation - post - processing of parts (part heat treatment - wire cutting - support removal - surface sandblasting - secondary machining) - part inspection (mechanical testing, non - destructive industrial CT inspection, metallographic analysis, fluorescence inspection) - installation and application.

[0105] 3) Define the data list

[0106] According to different life - cycle stages, it is divided into on - site data and background data.

[0107] On - site data: includes raw material consumption, energy consumption, and pollutant emissions during the production stage of aerospace additive - manufactured titanium alloy products, as shown in Table 2; the acquisition methods and sources of the data should be explained.

[0108] Table 2 On - site Data Collection Form

[0109]

[0110]

[0111]

[0112] b Background data: includes upstream process data such as raw material production, energy production, and transportation. All background data should be explained in detail, including the databases used and the years of publications (or reference books), as shown in Table 3

[0113] Table 3 Background Data Collection Form

[0114]

[0115] 4) Carbon footprint identification

[0116] The carbon emissions generated during the production process of titanium alloy by aviation additive manufacturing and related processes are classified into direct emissions and indirect emissions according to different emission sources, as shown in Table 4.

[0117] Table 2 Carbon emission sources and emission categories of titanium alloy by aviation additive manufacturing

[0118]

[0119]

[0120] 5) Carbon footprint calculation

[0121] The carbon footprint of recycled aluminum and titanium alloy products for aviation can be calculated according to Equation (1). During the calculation process, only the parts involved in the actual production process need to be considered.

[0122]

[0123] In the formula:

[0124] GHG——Carbon footprint of titanium alloy products for aviation, t CO2e / t;

[0125] GHG resou ——Total greenhouse gas emissions during the production process of main raw materials and auxiliary raw materials, tCO2e;

[0126] GHG ener ——Total greenhouse gas emissions during the production process of energy and water, tCO2e;

[0127] GHG tran ——Total greenhouse gas emissions during the product transportation process, tCO2e;

[0128] GHG prod ——Total greenhouse gas emissions during the product production process, tCO2e;

[0129] P——Output of qualified products, t.

[0130] Carbon emission stage of main raw materials and auxiliary raw materials: The carbon emissions of main raw materials and auxiliary raw materials should be calculated according to the following formula:

[0131]

[0132] In the formula:

[0133] GHG resou ——Total greenhouse gas emissions during the production process of main raw materials and auxiliary raw materials, tCO2e;

[0134] Q i —— Consumption of the i-th type of raw material, t;

[0135] F GHG,i —— Carbon emission factor of the i-th type of raw material, t CO2e / t.

[0136] Carbon emissions stage of energy and water production: Carbon emissions from energy and water production shall be calculated according to the following formula:

[0137]

[0138] Where:

[0139] GHG ener —— Total greenhouse gas emissions generated during the energy and water production process, tCO2e;

[0140] E i —— Consumption of the i-th type of energy or water, including fossil energy and electricity, etc., t or kWh;

[0141] R GHG,i —— Carbon emission factor of the i-th type of energy or water, tCO2e / t or tCO2e / kWh.

[0142] Carbon emissions stage of transportation: Carbon emissions during transportation shall be calculated according to the following formula:

[0143]

[0144] Where:

[0145] GHG tran —— Total greenhouse gas emissions during the product transportation process, tCO2e;

[0146] Q i,j —— Total amount of the i-th substance transported by the j-th transportation method, t;

[0147] D i,j —— Transportation distance of the i-th substance by the j-th transportation method, km;

[0148] C GHG,j —— Carbon emission factor of the j-th different transportation method, tCO2e / t·km.

[0149] Carbon emissions stage of product production: Carbon emissions from product production are greenhouse gas emissions generated by consuming fossil energy and shall be calculated according to the following formula:

[0150]

[0151] Where:

[0152] GHGprod —— Total greenhouse gas emissions generated during product production, tCO2e;

[0153] E' i —— Consumption of the i-th type of fossil fuel, in t for solid or liquid fuels and in 10,000 Nm3 for gaseous fuels;

[0154] NCV - Net calorific value of the i-th type of fossil fuel, in GJ / t for solid or liquid fuels and in GJ / 10,000 Nm3 for gaseous fuels;

[0155] CC i —— Carbon content per unit calorific value of the i-th type of fossil fuel, in tC / GJ for solid or liquid fuels and in tC / 10,000 Nm3 for gaseous fuels;

[0156] OF i —— Carbon oxidation rate of the i-th type of fossil fuel, %;

[0157] The net calorific value, carbon content per unit calorific value, and fuel carbon oxidation rate are calculated based on the measurement results of the factory, or the default values of the characteristic parameters of common fossil fuels in Table 2.1 of the "Accounting Methods and Reporting Guidelines for Greenhouse Gas Emissions of Enterprises in Other Industrial Sectors (Trial)" can also be used for calculation.

[0158] Based on the life cycle carbon footprint evaluation model and method, the present invention proposes a calculation method for the life cycle environmental impact of titanium alloy parts prepared by selective laser melting technology. By systematically analyzing each link from raw material extraction, manufacturing and processing, use and maintenance to scrapping and recycling, the carbon emission data at each stage is quantified. This method can not only accurately evaluate the carbon footprint during the additive manufacturing process of titanium alloy internally, master the life cycle environmental indicators (mainly carbon footprint) at each stage of product production and manufacturing, but also identify high-carbon emission links, providing a scientific basis for optimizing processes and reducing environmental impacts; from the perspective of green and low-carbon, it reviews the product system, identifies the comprehensive environmental impact of the product production system, provides support for the green manufacturing of aviation carbon alloys, and provides a scientific basis for enterprise environmental decision-making. Externally, it can provide life cycle environmental information of products to aviation industry customers and stakeholders, promoting the low-carbon and green transformation of products.

[0159] Although several embodiments of the present invention have been given in this article, those skilled in the art should understand that the embodiments in this article can be changed without departing from the spirit of the present invention. The above embodiments are only exemplary and should not be used as the limitation of the scope of the rights of the present invention.

Claims

1. A method for evaluating the carbon footprint of titanium alloy life cycle in aviation additive manufacturing, characterized in that: The method comprises: S1. Divide the life cycle stages of aviation additive manufacturing titanium alloys; S2, constructing the material flow and energy flow of each life cycle stage obtained in step S1; S3. Construct a carbon emission calculation model for each life cycle stage according to the life cycle stage division and the material flow and energy flow obtained in step S2; S4. According to the carbon emission calculation model, the carbon emission data of each life cycle stage is quantified.

2. The method for evaluating the carbon footprint of titanium alloy life cycle in aviation additive manufacturing according to claim 1, characterized in that: In step S1, the life cycle stages include raw material extraction stage, manufacturing and processing stage, use maintenance and scrapping and recycling stage.

3. The method for evaluating the carbon footprint of the life cycle of titanium alloys manufactured by aviation additive manufacturing according to claim 2, characterized in that: The raw material extraction stage includes: mining of titanium powder, adding recycled metal metallurgy, and atomization of electrode sensors to make powder; The manufacturing and processing stages include: powder screening, powder drying, parts preparation, parts post-processing, parts testing, and installation and application; The use, maintenance and scrapping and recycling stage includes: the use and maintenance process of the prepared titanium alloy product, and the scrapping and recycling process after the service life ends.

4. The method for evaluating the carbon footprint of the life cycle of titanium alloys manufactured by aviation additive manufacturing according to claim 1, characterized in that: The specific method of step S2 is: S21. Divide the life cycle stages into a number of inventory analysis units for easy analysis, and collect data on materials and energy involved in each inventory analysis unit, including data on main raw materials and auxiliary raw materials, energy data in the production and transportation processes, and related emission data; S22, determining the material flow and energy flow of each inventory analysis unit; S23, establishing a correlation relationship between the material flow and the energy flow of the inventory analysis unit, and calculating the input data and output data list of each inventory analysis unit based on the functional unit.

5. The method for evaluating the carbon footprint of the life cycle of titanium alloys manufactured by aviation additive manufacturing according to claim 4, characterized in that: In step S21, the main raw material and auxiliary raw material data specifically include the quantity of alloy powder, argon gas, substrate, personal protective equipment, and equipment consumables; the energy data of the production process includes the electricity and energy used in the production process; the transportation data includes the transportation of main raw materials, auxiliary raw materials and energy; the emission data includes solid waste, atmospheric emissions and water emissions.

6. The method for evaluating the carbon footprint of the life cycle of titanium alloys manufactured by aviation additive manufacturing according to claim 4, characterized in that: Step S3 is specifically as follows: S31. Identify the carbon emission sources at each life cycle stage according to the life cycle stage division; S32. Construct a carbon footprint calculation model consisting of main raw materials and auxiliary raw materials, energy and water in the production process, product transportation process and product production process through the correlation relationship between the material flow and energy flow of each inventory analysis unit.

7. The method for evaluating the carbon footprint of the life cycle of titanium alloys manufactured by aviation additive manufacturing according to claim 6, characterized in that: In step S32, the carbon footprint calculation model is: Where: GHG——Carbon footprint of titanium alloy products for aviation, t CO2e / t; GHG resou ——Total greenhouse gas emissions from the production process of main raw materials and auxiliary raw materials, tCO2e; GHG ener ——Total greenhouse gas emissions from energy and water production, tCO2e; GHG tran ——Total greenhouse gas emissions during product transportation, tCO2e; GHG prod ——Total greenhouse gas emissions generated by product production, tCO2e; P——Output of qualified products, t; in: Where: Q i ——Consumption of raw materials of category i, t; F GHG,i ——Carbon emission factor of the i-th type of raw materials, t CO2e / t; Where: E i ——Consumption of energy or water of category i, including fossil energy and electricity, in t or kWh; R GHG,i ——Carbon emission factor of the i-th energy or water, tCO2e / t or tCO2e / kWh; Where: Q i,j ——The total amount of the i-th substance transported by the j-th mode of transport, t; D i,j ——Transport distance of the i-th substance by the j-th mode of transport, km; C GHG,j ——Carbon emission factor of the jth mode of transport, tCO2e / t·km; Where: E' i - Consumption of fossil fuel of category i, in tons for solid or liquid fuels and in ten thousand Nm3 for gaseous fuels 3 NCV is the lower calorific value of the i-th fossil fuel, which is expressed in GJ / t for solid or liquid fuels and in GJ / 10,000 Nm2 for gaseous fuels. 3 Unit: CC i ——The carbon content per unit calorific value of the i-th fossil fuel, expressed in tC / GJ for solid or liquid fuels and in tC / 10,000 Nm2 for gaseous fuels. 3 Unit: OF i ——is the carbon oxidation rate of the ith fossil fuel, %.

8. A life cycle carbon footprint assessment system for aviation additive manufacturing titanium alloy, characterized in that: The system is used to implement the method according to any one of claims 1 to 7, and the system includes: Life cycle phase division unit, used for life cycle phase division of titanium alloys for aviation additive manufacturing; Material flow and energy flow construction and calculation unit, used to construct and calculate the material flow and energy flow of each life cycle stage; The carbon emission calculation unit is used to construct a carbon emission calculation model for each life cycle stage and calculate the carbon emission data for each life cycle stage of aviation additive manufacturing titanium alloy.

9. An application of a method for evaluating the carbon footprint of a titanium alloy life cycle in aviation additive manufacturing, characterized in that: The method described in any one of claims 1 to 7 is used to calculate the carbon footprint of the life cycle of aviation additive manufacturing titanium alloy, identify high carbon emission links and factors, and optimize the process of the high carbon emission links and factors.

10. An application of a method for evaluating the carbon footprint of a titanium alloy life cycle in aviation additive manufacturing, characterized in that: By using the method described in any one of claims 1 to 7, the carbon footprint of the life cycle of aviation additive manufacturing titanium alloy in different process flows is calculated respectively, the carbon emission data of different process flows are compared, and the environmental friendliness of different process flows is evaluated.

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