A method for producing carbon-chromium alloy with optimal hardness

Abstract

The present invention discloses a method for generating a carbon-chromium alloy with optimal hardness, comprising: setting the elemental components of the carbon-chromium alloy and the total mass of the carbon-chromium alloy, and constructing an iron matrix model in software; setting the initial mass percentage of each elemental component, calculating the initial atomic number of each elemental component, and using the initial atomic number of each elemental component to replace an equal amount of iron atoms in the iron matrix model to form a first model; using carbon atoms to replace an equal amount of iron atoms in the first model to form multiple second models; pressing a diamond indenter model into each of the second models, obtaining a first optimal percentage of carbon in the second model with the smallest indentation depth; and similarly obtaining the optimal mass percentages of manganese, silicon, nickel, molybdenum, and vanadium. Based on the optimal percentages of each elemental component and the mass of the carbon-chromium alloy, a carbon-chromium alloy with optimal hardness can be obtained. The present invention has a simple process and low cost.

Description

Technical Field

[0001] The invention belongs to the technical field of alloy material structure design, and in particular relates to a method for generating a carbon-chromium alloy with optimal hardness. Background Art

[0002] At present, low-alloy weathering steel is mainly used as steel structure in the fields of rail transportation, bridges, and bridge construction. It is required to have good service performance such as strength and toughness, and just-contact fatigue. The traditional technical approach to strengthening and toughening low-alloy high-weathering steel mainly adopts microalloying, forging and complex overall heat treatment technology. However, these technologies not only have high production costs and high energy consumption, but are also environmentally unfriendly. Therefore, how to obtain a carbon-chromium alloy with high hardness, low production cost, low energy consumption, and environmental friendliness is the problem to be solved by the present invention. Summary of the Invention

[0003] The invention provides a method for generating a carbon-chromium alloy with optimal hardness, which solves the problems of high production cost and high energy consumption in the traditional carbon-chromium alloy strengthening and toughening treatment process.

[0004] In order to achieve the above technical objectives, the present invention adopts the following technical solutions:

[0005] In one aspect, the present invention provides a method for producing a carbon-chromium alloy of optimal hardness, comprising the steps of:

[0006] S1: Set the element composition of the carbon-chromium alloy, including carbon, chromium, manganese, silicon, nickel, molybdenum, vanadium and iron;

[0007] S2: setting the total mass of the carbon-chromium alloy and constructing an iron matrix model in the software;

[0008] S3: setting the initial mass percentage of each element component and the mass percentage range of each element component, calculating the initial atomic number of each element component, and using the initial atomic number of each element component to replace an equal amount of iron atoms in the iron matrix model to form a first model;

[0009] S4: replacing an equal number of iron atoms in the first model with a number of carbon atoms to form a plurality of second models, wherein a is a plurality of non-repeating natural positive integers;

[0010] S5: simulating a heating and cooling process for the second model in the software, and then pressing the diamond indenter model into the cooled second model to obtain the indentation depth. The number of carbon atoms in the second model with the minimum indentation depth is the optimal number of carbon atoms, and the corresponding mass percentage of the carbon element is the first optimal percentage.

[0011] S6: using the carbon atoms with the optimal number of carbon atoms and the initial number of manganese atoms, silicon atoms, nickel atoms, molybdenum atoms, and vanadium atoms to replace an equal amount of iron atoms in the iron matrix model to form a third model,

[0012] S7: replacing an equal number of iron atoms in the third model with b number of chromium atoms to form a plurality of fourth models, wherein b is a plurality of non-repeating natural positive integers;

[0013] S8: simulating a heating and cooling process for the fourth model in software, and then pressing the diamond indenter model into the cooled fourth model, respectively, and obtaining an indentation depth. The number of chromium atoms in the fourth model with the smallest indentation depth is the optimal number of chromium atoms, and the corresponding mass percentage of chromium element is the second optimal percentage.

[0014] S9: Similarly, the optimal mass percentage of manganese is the third optimal percentage, the optimal mass percentage of silicon is the fourth optimal percentage, the optimal mass percentage of nickel is the fifth optimal percentage, the optimal mass percentage of molybdenum is the sixth optimal percentage, and the optimal mass percentage of vanadium is the seventh optimal percentage;

[0015] S10: A carbon-chromium alloy with optimal hardness can be obtained according to the optimal percentage of each element component and the quality of the carbon-chromium alloy.

[0016] In the above-mentioned method for generating a carbon-chromium alloy with optimal hardness, the formula for calculating the initial atomic number of each element component in step S3 is:

[0017] X i = n i ×N A ;

[0018] Among them, X i Indicates the number of atoms, n i Indicates the amount of substance of the element component, N A is Avogadro's constant, i is one of carbon, chromium, manganese, silicon, nickel, molybdenum and vanadium;

[0019] n i =m i / M i ;

[0020] Among them, n i Indicates the amount of substance of the element component, m i Represents the initial mass of each element component, M i is the relative molecular mass of the substance, i is one of carbon, chromium, manganese, silicon, nickel, molybdenum and vanadium;

[0021] m i= M×Xi

[0022] Where M represents the mass of carbon chromium alloy, X i Indicates the initial mass percentage of each element component.

[0023] In the method for generating a carbon-chromium alloy with optimal hardness as described above, in step S4 or S7, carbon atoms or chromium atoms are used to replace an equal amount of iron atoms by a random insertion method, and the atoms of each element component are evenly distributed in the iron matrix model.

[0024] In the method for generating a carbon-chromium alloy with optimal hardness as described above, the specific steps of pressing the diamond indenter model into the plurality of second models or the fourth models in step S5 or S8 are as follows: pressing the diamond indenter model from directly above, and the size of the diamond indenter model is larger than the size of the second model or the fourth model.

[0025] According to the method for generating a carbon-chromium alloy with optimal hardness, the speed at which the diamond indenter mold is pressed into the second mold and the speed at which the diamond indenter mold is pressed into the fourth mold are the same.

[0026] In the method for generating a carbon-chromium alloy with optimal hardness as described above, the heating temperature for simulating heating the second model or the fourth model in step S5 or S8 is 800-1000° C., and natural cooling is used for cooling.

[0027] In the method for generating a carbon-chromium alloy with optimal hardness as described above, the software in step S1 adopts Materials Studio.

[0028] Compared with the existing technology, the advantages and positive effects of the present invention are: this patent obtains the optimal mass percentage of each element component of the carbon-chromium alloy through software construction model, and produces carbon-chromium alloy with better hardness based on the optimal mass percentage, thereby reducing the complexity of the process, saving manpower and material resources, improving production efficiency, and reducing harm to the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0030] Figure 1 It is a flowchart of the present invention. DETAILED DESCRIPTION

[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0032] It should be noted that in the description of the present invention, terms such as "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. These are merely for ease of description and do not indicate or imply that the device or component described must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0033] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integral connection; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0034] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0035] The disclosure below provides many different embodiments or examples for realizing different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. In addition, the present invention may repeat reference numbers and / or reference letters in different examples. Such repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides examples of various specific processes and materials, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0036] like Figure 1 As shown, this embodiment provides a method for generating a carbon-chromium alloy with optimal hardness, comprising the following steps:

[0037] S1: Set the element composition of the carbon-chromium alloy, including carbon, chromium, manganese, silicon, nickel, molybdenum, vanadium and iron;

[0038] S2: setting the total mass of the carbon-chromium alloy and constructing an iron matrix model in the software;

[0039] S3: Set the initial mass percentage of each elemental component and the mass percentage range of each elemental component, calculate the initial atomic number of each elemental component and use the initial atomic number of each elemental component to replace an equal amount of iron atoms in the iron matrix model to form a first model; the initial mass percentage can take the middle value of the mass percentage range, and taking the middle value is more efficient during the experiment.

[0040] In this embodiment, the mass percentage of carbon is in the range of 0.1-1%, the mass percentage of chromium is in the range of 3-12%, the mass percentage of manganese is in the range of 0.4-1.5%, the mass percentage of silicon is in the range of 0.2-1, the mass percentage of nickel is in the range of 0.1-0.8%, the mass percentage of molybdenum is in the range of 0.4-1.5%, and the mass percentage of vanadium is in the range of 0.4-1.5%; the initial mass percentage of carbon is 0.5%, the initial mass percentage of chromium is 8%, the initial mass percentage of manganese is 1%, the initial mass percentage of silicon is 0.6%, the initial mass percentage of nickel is 0.5%, the initial mass percentage of molybdenum is 1.0%, and the initial mass percentage of vanadium is 1%.

[0041] Get the initial mass percentage of iron and calculate the number of atoms of each element component except iron. The calculation process is as follows:

[0042] M Fe =1- M C -M Cr -M Mn -M Si -M Ni -MMo -M V ;

[0043] Among them, M Fe represents the initial mass percentage of iron, M C Indicates the initial mass percentage of carbon, M Cr Indicates the initial mass percentage of chromium, M Mn Indicates the initial mass percentage of manganese, M Si Indicates the initial mass percentage of silicon, M Ni Indicates the initial mass percentage of nickel, M Mo Indicates the initial mass percentage of molybdenum, M V represents the initial mass percentage of vanadium;

[0044] n i =m i / M i ;

[0045] Among them, n i Indicates the amount of substance of the element component, m i Represents the initial mass of the element components, which is obtained by multiplying the mass of the carbon-chromium alloy by the mass percentage of each element component. i is the relative molecular mass of the substance, i is one of carbon, chromium, manganese, silicon, nickel, molybdenum and vanadium;

[0046] X i = n i ×N A ;

[0047] Among them, X i Indicates the number of atoms, n i Indicates the amount of substance of the element component, N A is Avogadro's constant, i is one of carbon, chromium, manganese, silicon, nickel, molybdenum and vanadium;

[0048] An iron matrix model was constructed using software. The total number of atoms in the iron matrix model was equal to the sum of the number of atoms of each elemental component. After the initial number of atoms of each element was calculated based on the mass of the carbon-chromium alloy and the initial mass percentage of each element, the initial number of atoms of each elemental component was used to replace an equal amount of iron atoms in the iron matrix model to form a first model.

[0049] In this embodiment, the first model is formed by replacing the corresponding number of iron atoms in the iron matrix model with 1% chromium atoms, 1% manganese atoms, 0.6% silicon atoms, 0.3% nickel atoms, 1% molybdenum atoms, and 0.5% vanadium atoms in initial mass percentage.

[0050] S4: replacing an equal number of iron atoms in the first model with a number of carbon atoms to form a plurality of second models, wherein a is a plurality of non-repeating natural positive integers;

[0051] In this embodiment, the mass percentage of carbon ranges from 0.1 to 1%. Multiple mass percentages are selected, namely 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, and 1%. The number of carbon atoms corresponding to the mass percentages is respectively calculated, and the number of iron atoms in the first model is replaced by the number of corresponding carbon atoms to obtain 10 second models.

[0052] S5: simulating the heating and cooling processes of the second model in the software, wherein the simulated heating temperature is 800-1000° C. and the cooling is performed naturally; then, the diamond indenter models are respectively pressed into the cooled second model, and the indentation depth is obtained. The number of carbon atoms in the second model with the minimum indentation depth is the optimal number of carbon atoms, and the corresponding mass percentage of the carbon element is the first optimal percentage. The simulated heating temperature is 800-1000° C. and the natural cooling method can fully eliminate the structural defects in the model, making the model closer to some physical and mechanical properties of the real carbon-chromium alloy.

[0053] S6: using the carbon atoms with the optimal number of carbon atoms and the initial number of manganese atoms, silicon atoms, nickel atoms, molybdenum atoms, and vanadium atoms to replace an equal amount of iron atoms in the iron matrix model to form a third model;

[0054] In this embodiment, the third model is formed by replacing the corresponding number of iron atoms in the iron matrix model with 1% manganese atoms, 0.6% silicon atoms, 0.3% nickel atoms, 1% molybdenum atoms, 0.5% vanadium atoms and the first optimal percentage of carbon atoms by initial mass percentage.

[0055] S7: replacing an equal number of iron atoms in the third model with b number of chromium atoms to form a plurality of fourth models, wherein b is a plurality of non-repeating natural positive integers;

[0056] In this embodiment, the mass percentage of chromium ranges from 3 to 12%. Multiple mass percentages are selected, namely 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 11%, and 12%. The number of chromium atoms corresponding to the mass percentages is calculated, and the number of iron atoms in the third model is replaced by the number of chromium atoms corresponding to each mass percentage to obtain 10 fourth models.

[0057] S8: simulating a heating and cooling process for the fourth model in software, wherein the simulated heating temperature is 800-1000° C. and the cooling is performed naturally; then, the diamond indenter models are respectively pressed into the cooled fourth models, and the indentation depths are obtained. The number of chromium atoms in the fourth model with the minimum indentation depth is the optimal number of chromium atoms, and the corresponding mass percentage of chromium element is the first optimal percentage;

[0058] S9: Similarly, the optimal mass percentage of manganese is the third optimal percentage, the optimal mass percentage of silicon is the fourth optimal percentage, the optimal mass percentage of nickel is the fifth optimal percentage, the optimal mass percentage of molybdenum is the sixth optimal percentage, and the optimal mass percentage of vanadium is the seventh optimal percentage; thus, the optimal mass percentages of the element components in the carbon-chromium alloy with the optimal hardness are obtained, specifically:

[0059] A fifth model is formed by replacing the corresponding number of iron atoms in the iron matrix model with 0.6% silicon atoms, 0.3% nickel atoms, 1% molybdenum atoms, 0.5% vanadium atoms, the first optimal percentage of carbon atoms, and the second optimal percentage of chromium atoms in the initial mass percentage;

[0060] A plurality of sixth models are formed by replacing an equal number of iron atoms in the fifth model with c number of manganese atoms, wherein c is a plurality of non-repeating natural positive integers;

[0061] In this embodiment, the mass percentage of chromium ranges from 0.4 to 1.5%. Multiple mass percentages are selected, namely 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1%, 1.1%, 1.2%, 1.3%, 1.4%, and 1.5%. The number of manganese atoms corresponding to the mass percentages is calculated, and the number of iron atoms in the fifth model is replaced by the corresponding number of manganese atoms to obtain 12 sixth models.

[0062] The heating and cooling processes are simulated for the sixth model, and then the diamond indenter model is pressed into multiple sixth models to obtain the pressing depth. The sixth model with the smallest pressing depth has the third optimal mass percentage of manganese.

[0063] A seventh model is formed by replacing the corresponding number of iron atoms in the iron matrix model with 0.3% nickel atoms, 1% molybdenum atoms, 0.5% vanadium atoms, the first optimal percentage of carbon atoms, the second optimal percentage of chromium atoms, and the third optimal percentage of manganese atoms in the initial mass percentage;

[0064] Replacing an equal number of iron atoms in the seventh model with d silicon atoms to form a plurality of eighth models, wherein d is a plurality of non-repeating natural positive integers;

[0065] In this embodiment, the mass percentage of silicon is in the range of 0.2-1.0%. Multiple mass percentages are selected, namely 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, and 1%. The number of silicon atoms corresponding to the mass percentage is calculated, and the number of iron atoms in the seventh model is replaced by the number of corresponding silicon atoms to obtain 9 eighth models.

[0066] Simulating heating and cooling processes for the eighth model, then pressing the diamond indenter model into multiple eighth models, and obtaining the indentation depth, wherein the eighth model having the smallest indentation depth has a silicon mass percentage of the fourth optimal percentage;

[0067] Injecting 1% molybdenum, 0.5% vanadium, a first optimal percentage of carbon, a second optimal percentage of chromium, a third optimal percentage of manganese, and a fourth optimal percentage of silicon into the iron matrix model in step S2 to form a ninth model;

[0068] A ninth model is formed by replacing the corresponding number of iron atoms in the iron matrix model with 1% of molybdenum atoms, 0.5% of vanadium atoms, the first optimal percentage of carbon atoms, the second optimal percentage of chromium atoms, the third optimal percentage of manganese atoms, and the fourth optimal percentage of silicon atoms as initial mass percentages;

[0069] A plurality of tenth models are formed by replacing an equal number of iron atoms in the ninth model with an e number of nickel atoms, wherein e is a plurality of non-repeating natural positive integers;

[0070] In this embodiment, the mass percentage of nickel ranges from 0.1 to 0.8%. Multiple mass percentages of 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, and 0.8% are selected, and the number of nickel atoms corresponding to the mass percentages is respectively calculated. The number of iron atoms in the ninth model is replaced by the number of corresponding nickel atoms to obtain eight tenth models.

[0071] Simulating heating and cooling processes for the tenth model, then pressing the diamond indenter model into the plurality of tenth models, and obtaining the indentation depth, wherein the tenth model having the smallest indentation depth has a nickel mass percentage of the fifth optimal percentage;

[0072] An eleventh model is formed by replacing the corresponding number of iron atoms in the iron matrix model with vanadium atoms having an initial mass percentage of 0.5%, carbon atoms having a first optimal percentage, chromium atoms having a second optimal percentage, manganese atoms having a third optimal percentage, silicon atoms having a fourth optimal percentage, and nickel atoms having a fifth optimal percentage;

[0073] A plurality of twelfth models are formed by replacing an equal number of iron atoms in the eleventh model with f number of molybdenum atoms, wherein f is a plurality of non-repeating natural positive integers;

[0074] In this embodiment, the mass percentage of molybdenum is in the range of 0.4-1.5%. A plurality of mass percentages are selected, namely 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1%, 1.1%, 1.2%, 1.3%, 1.4%, and 1.5%. The number of molybdenum atoms corresponding to the mass percentages is respectively calculated, and the number of iron atoms in the eleventh model is replaced by the number of corresponding molybdenum atoms to obtain 12 twelfth models.

[0075] Simulating the heating and cooling process of the twelfth model, then pressing the diamond indenter model into the plurality of twelfth models, and obtaining the indentation depth, wherein the twelfth model having the smallest indentation depth has the sixth optimal percentage of molybdenum by mass;

[0076] Replacing the corresponding number of iron atoms in the iron matrix model with the first optimal percentage of carbon atoms, the second optimal percentage of chromium atoms, the third optimal percentage of manganese atoms, the fourth optimal percentage of silicon atoms, the fifth optimal percentage of nickel atoms, and the sixth optimal percentage of molybdenum atoms by initial mass percentage to form a thirteenth model;

[0077] A plurality of fourteenth models are formed by replacing an equal amount of iron atoms in the thirteenth model with g number of vanadium atoms, wherein g is a plurality of non-repeating natural positive integers;

[0078] In this embodiment, the mass percentage of vanadium is in the range of 0.4-1.5%. Multiple mass percentages are selected, namely 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, and 1%. The number of vanadium atoms corresponding to the mass percentage is calculated, and the number of iron atoms in the thirteenth model is replaced by the number of corresponding vanadium atoms to obtain 10 fourteenth models.

[0079] The heating and cooling processes of the fourteenth model are simulated, and then the diamond indenter model is pressed into multiple fourteenth models to obtain the pressing depth. The fourteenth model with the smallest pressing depth has the seventh optimal percentage of vanadium by mass.

[0080] The best hardness of the carbon-chromium alloy is achieved when the carbon in the iron matrix model is the first optimal percentage, the chromium is the second optimal percentage, the manganese is the third optimal percentage, the silicon is the fourth optimal percentage, the nickel is the fifth optimal percentage, the molybdenum is the sixth optimal percentage, and the vanadium is the seventh optimal percentage.

[0081] When using different numbers of carbon, chromium, manganese, silicon, nickel, molybdenum, and vanadium atoms to replace the iron atoms in the iron matrix model, a random insertion method is adopted, and the atoms of each element component are evenly distributed in the iron matrix model to ensure the stability of the iron matrix model.

[0082] When the diamond indenter model is pressed into the iron matrix model after atom replacement, the speed is the same and slow. The size of the diamond indenter model needs to be larger than the iron matrix model to ensure normal insertion. The diamond indenter model can be simulated and generated using Materials Studio based on the mass, shape, and size of the diamond in daily experiments.

[0083] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0084] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for a person skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to replace some of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions claimed to be protected by the present invention.

Claims

1. A method for producing a carbon-chromium alloy of optimum hardness, characterized in that: The following steps are involved: S1: Set the element composition of the carbon-chromium alloy, including carbon, chromium, manganese, silicon, nickel, molybdenum, vanadium and iron; S2: setting the total mass of the carbon-chromium alloy and constructing an iron matrix model in the software; S3: setting the initial mass percentage of each element component and the mass percentage range of each element component, calculating the initial atomic number of each element component, and using the initial atomic number of each element component to replace an equal amount of iron atoms in the iron matrix model to form a first model; S4: replacing an equal number of iron atoms in the first model with a number of carbon atoms to form a plurality of second models, wherein a is a plurality of non-repeating natural positive integers; S5: simulating a heating and cooling process for the second model in the software, and then pressing the diamond indenter model into the cooled second model to obtain the indentation depth. The number of carbon atoms in the second model with the minimum indentation depth is the optimal number of carbon atoms, and the corresponding mass percentage of the carbon element is the first optimal percentage. S6: using the carbon atoms with the optimal number of carbon atoms and the initial number of manganese atoms, silicon atoms, nickel atoms, molybdenum atoms, and vanadium atoms to replace an equal amount of iron atoms in the iron matrix model to form a third model; S7: replacing an equal number of iron atoms in the third model with b number of chromium atoms to form a plurality of fourth models, wherein b is a plurality of non-repeating natural positive integers; S8: simulating a heating and cooling process for the fourth model in software, and then pressing the diamond indenter model into the cooled fourth model, respectively, and obtaining an indentation depth. The number of chromium atoms in the fourth model with the smallest indentation depth is the optimal number of chromium atoms, and the corresponding mass percentage of chromium element is the second optimal percentage. S9: Similarly, the optimal mass percentage of manganese is the third optimal percentage, the optimal mass percentage of silicon is the fourth optimal percentage, the optimal mass percentage of nickel is the fifth optimal percentage, the optimal mass percentage of molybdenum is the sixth optimal percentage, and the optimal mass percentage of vanadium is the seventh optimal percentage; S10: A carbon-chromium alloy with optimal hardness can be obtained according to the optimal percentage of each element component and the quality of the carbon-chromium alloy.

2. The method for producing a carbon-chromium alloy with optimal hardness according to claim 1, characterized in that: The formula for calculating the initial atomic number of each element component in step S3 is: X i = n i ×N A ; Among them, X i Indicates the number of atoms, n i Indicates the amount of substance of the element component, N A is Avogadro's constant, i is one of carbon, chromium, manganese, silicon, nickel, molybdenum and vanadium; n i =m i / M i ; Among them, n i Indicates the amount of substance of the element component, m i Represents the initial mass of each element component, M i is the relative molecular mass of the substance, i is one of carbon, chromium, manganese, silicon, nickel, molybdenum and vanadium; m i= M×X i Where M represents the mass of carbon chromium alloy, X i Indicates the initial mass percentage of each element component.

3. The method for producing a carbon-chromium alloy with optimal hardness according to claim 1, wherein: In step S4 or S7, carbon atoms or chromium atoms are used to replace an equal amount of iron atoms by a random insertion method, and the atoms of each element component are evenly distributed in the iron matrix model.

4. The method for producing a carbon-chromium alloy with optimal hardness according to claim 1, wherein: The specific steps of pressing the diamond indenter model into the plurality of second models or the fourth models in step S5 or S8 are as follows: pressing the diamond indenter model from directly above, and the size of the diamond indenter model is larger than that of the second model or the fourth model.

5. The method for producing a carbon-chromium alloy with optimal hardness according to claim 4, characterized in that: The speed at which the diamond indenter mold is pressed into the second mold and the speed at which the diamond indenter mold is pressed into the fourth mold are the same.

6. The method for producing a carbon-chromium alloy with optimal hardness according to claim 1, wherein: In the step S5 or S8, the heating temperature for simulating heating the second model or the fourth model is 800-1000° C., and natural cooling is used for cooling.

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