BFe30-1-1 corrosion-resistant copper alloy with high impact energy and preparation method of BFe30-1-1 corrosion-resistant copper alloy

Abstract

The invention provides a BFe30-1-1 corrosion-resistant copper alloy with high impact energy and a preparation method of the BFe30-1-1 corrosion-resistant copper alloy. The alloy comprises the following components in percentage by weight: 0.4 wt%-0.75 wt% of Fe, 0.5 wt%-1.0 wt% of Mn, 29.0 wt%-32.0 wt% of Ni, 0.2 wt%-0.5 wt% of Ti and the balance of copper. The method comprises the following steps: step 1, preparing coiled wires; step 2, processing the substrate; step 3, GMAW surfacing is carried out; step 4, nondestructive testing; and step 5, testing room-temperature impact energy. According to the BFe30-1-1 corrosion-resistant copper alloy with the high impact energy and the preparation method of the BFe30-1-1 corrosion-resistant copper alloy, the composition of the corrosion-resistant copper alloy can be optimized, and the preparation cost of the copper alloy is reduced; and the preparation method of the copper alloy can be optimized, the use safety and reliability of the BFe30-1-1 corrosion-resistant copper alloy in the impact environment are improved, and the stability of the preparation method is guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of alloy, in particular to a BFe30-1-1 corrosion-resistant copper alloy with high impact energy and a preparation method thereof. BACKGROUND

[0002] The corrosion-resistant copper alloy represented by BFe30-1-1 is widely used in the fields of domestic and foreign ships and ocean engineering, such as important parts of through-hull piping system, heat exchange equipment and valve, because it has excellent cold and hot working performance, corrosion resistance and anti-sea biological fouling performance. The corrosion-resistant copper alloy BFe30-1-1 is usually used as a structural material in the application scene, and inevitably will be subjected to the action of impact force and will be twisted and deformed to a certain extent, and even may be broken or fractured when the external force is large enough. At present, the domestic and foreign corrosion-resistant copper alloy BFe30-1-1 can be divided into castings, forgings, sheet materials, pipe materials and other processed parts according to product types, and its room temperature impact energy is about 150J. In order to further improve the safety and reliability of the corrosion-resistant copper alloy BFe30-1-1 used in high impact environment in ships and ocean engineering, it is of great significance to study how to optimize the composition and preparation method of the corrosion-resistant copper alloy BFe30-1-1, so that it can have higher impact energy (≥240J).

[0003] The patent CN105003754A proposes a heat preservation impact resistant copper pipe, introduces a production process of the heat preservation impact resistant copper pipe, and the production idea is to sequentially arrange the expanded perlite layer rock, the fabric layer and the sheath from inside to outside on the copper pipe, so as to improve the transportation quality of the copper pipe and prolong the service life of the copper pipe. This method actually wraps a thick protective buffer layer on the copper pipe, and does not directly improve the material performance of the copper pipe. The patent CN103667786A proposes an impact resistant copper nickel alloy and a preparation method thereof, introduces an impact resistant copper nickel alloy and a preparation process thereof, and the composition of the copper nickel alloy is as follows: the weight ratio of Ni is 7.7wt.%-8.4wt.%, the weight ratio of Pt is 0.2wt.%-0.4wt.%, the weight ratio of Ti is 0.1wt.%-0.3wt.%, the weight ratio of Rb is 0.03wt.%-0.06wt.%, the weight ratio of Os is 0.04wt.%-0.06wt.%, and the balance is Cu. The main preparation method is that during the smelting process of the alloy, Ni, Pt and Ti are added at 1300°C and smelted for 5 hours, then Rb, Os and Cu are added at 1800°C and smelted for 5 hours, then the alloy is cooled at a rate of 45°C / s to obtain a copper nickel alloy with high impact toughness. The above preparation method improves the performance by adding expensive Rb, Pt and Os elements, and the high smelting temperature and long holding time significantly increase the preparation cost, and the prepared alloy system is not the BFe30-1-1 corrosion resistant copper alloy for ships and marine engineering. SUMMARY

[0004] Therefore, the present application aims to provide a BFe30-1-1 corrosion resistant copper alloy with high impact work and a preparation method thereof, so as to solve the problems that the BFe30-1-1 corrosion resistant copper alloy used as a structural material may be twisted, deformed, cracked or broken in a high impact environment, thereby causing low safety and reliability, and the addition of expensive elements to improve the material performance not only increases the cost of the copper alloy, but also the prepared alloy is not suitable for the application scenarios required by ships and marine engineering; so as to optimize the composition of the corrosion resistant copper alloy, reduce the preparation cost of the copper alloy, optimize the preparation method of the copper alloy, improve the safety and reliability of the BFe30-1-1 corrosion resistant copper alloy in the impact environment, and ensure the stability of the preparation method.

[0005] To achieve the above purpose, the technical scheme of the present application is as follows:

[0006] The application relates to a BFe30-1-1 corrosion-resistant copper alloy with high impact work and a preparation method thereof.

[0007] The application relates to a preparation method of a BFe30-1-1 corrosion-resistant copper alloy with high impact work, and the method is applied to the preparation of the BFe30-1-1 corrosion-resistant copper alloy with high impact work.

[0008] Step one, disc wire preparation: the components of the BFe30-1-1 corrosion-resistant copper alloy and the components of impurity elements are respectively controlled to prepare the disc wire of the corrosion-resistant copper alloy with a required diameter;

[0009] Step two, substrate processing: BFe30-1-1 corrosion-resistant copper alloy ingots or plates are adopted to obtain the substrate for surfacing by blanking and machining to meet the size requirements;

[0010] Step three, GMAW surfacing: the prepared corrosion-resistant copper alloy disc wire is used for GMAW surfacing on a multifunctional welder, and the surfacing layer with a required height on the substrate is obtained through layer-by-layer surfacing treatment;

[0011] Step four, nondestructive testing: after the surfacing layer is cut and separated from the substrate, the surfacing layer is subjected to surface treatment and flaw detection to obtain a qualified surfacing sample;

[0012] Step five, room temperature impact work test: the surfacing sample is sampled, and the sample is processed according to the regulation and impact test is carried out to obtain the BFe30-1-1 corrosion-resistant copper alloy with high impact work.

[0013] Further, step one comprises:

[0014] Step S11: the components of the corrosion-resistant copper alloy and the elements in the impurity elements are respectively controlled according to the weight ratio;

[0015] Step S12: the disc wire of the corrosion-resistant copper alloy with a required diameter is prepared through a required process.

[0016] Further, in step S11, the elements in the impurity elements are controlled according to the weight ratio as follows: P <=0.02 wt%, Pb <=0.02 wt%, Si <=0.15 wt%, S <=0.01 wt%, C <=0.04 wt%, and the total amount of other impurity elements <=0.1 wt%.

[0017] Further, in step S12, the diameter of the prepared BFe30-1-1 corrosion-resistant copper alloy wire is Φ1.2mm, and the tolerance is ±0.06mm.

[0018] Further, in step two, the thickness of the surfacing substrate is ≥30mm.

[0019] Further, step three includes:

[0020] Step S31: GMAW surfacing: using the prepared corrosion-resistant copper alloy wire to perform GMAW surfacing on a multifunctional welder;

[0021] Step S32: After completing a layer of surfacing, remove the oxides on the surface of the completed surfacing layer; and detect the height of the current surfacing layer.

[0022] Step S33: Determine whether the current surfacing height reaches the required surfacing height; if yes, perform step four; otherwise, return to step S31 to perform the next layer of surfacing.

[0023] Further, in step S31, the welding current of GMAW surfacing is in the range of 100A-300A.

[0024] Further, in step S31, the arc voltage of GMAW surfacing is in the range of 15V-40V.

[0025] Further, step four includes:

[0026] Step S41: Non-destructive testing: after cutting and separating the surfacing layer from the substrate, perform surface treatment on the surfacing layer;

[0027] Step S42: Use calibrated X-ray flaw detection equipment to perform flaw detection on the surfacing layer;

[0028] Step S43: Determine whether the X-ray flaw detection result meets the Class II qualified requirements specified in NB / T 47013.2-2023; if yes, obtain a qualified surfacing sample and perform step five; otherwise, the current surfacing layer is unqualified.

[0029] Compared with the prior art, the BFe30-1-1 corrosion-resistant copper alloy with high impact work and the preparation method thereof have the following beneficial effects:

[0030] By optimizing the component composition of the corrosion-resistant copper alloy, the preparation cost of the copper alloy is reduced; by optimizing the preparation method of the copper alloy, the copper alloy has the performance of high impact work, improves the safety and reliability of the BFe30-1-1 corrosion-resistant copper alloy in impact environment, and ensures the stability of the preparation method. BRIEF DESCRIPTION OF DRAWINGS

[0031] The accompanying drawings, which form a part of this specification, are included to provide a further understanding of the application and are incorporated into and constitute a part of this specification. The embodiments of the application, and their

[0032] Figure 1 Flow chart of the preparation method of the corrosion-resistant copper alloy. DETAILED DESCRIPTION

[0033] The application concepts will hereinafter be described with the aid of terms typically employed by those skilled in the art of conveying the substance of their work to others skilled in the art. However, such application concepts can be embodied in many different forms and should not be considered limited to the embodiments set forth herein.

[0034] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0035] The present application will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0036] In order to solve the phenomenon of distortion, deformation, cracking or breaking of the BFe30-1-1 corrosion-resistant copper alloy used as a structural material in the prior art under high impact environment, thereby causing the problems of low safety and reliability, and the problem that the material performance is improved by adding expensive elements, which not only easily increases the cost of the copper alloy, but also the prepared alloy is not suitable for the application scenarios required by ships and marine engineering; the present embodiment proposes a BFe30-1-1 corrosion-resistant copper alloy with high impact work and a preparation method thereof, the components of the BFe30-1-1 corrosion-resistant copper alloy with high impact work are as follows: Fe 0.4 wt%-0.75 wt%, Mn 0.5 wt%-1.0 wt%, Ni 29.0 wt%-32.0 wt%, Ti 0.2 wt%-0.5 wt%, and the balance is copper.

[0037] By optimizing the component composition of the corrosion-resistant copper alloy, the preparation cost of the copper alloy is reduced, and the economic benefits of the BFe30-1-1 corrosion-resistant copper alloy with high impact work in actual application are improved.

[0038] A preparation method of a BFe30-1-1 corrosion-resistant copper alloy with high impact work, the method is applied to prepare the BFe30-1-1 corrosion-resistant copper alloy with high impact work, and the method comprises the following steps:

[0039] Step one, disc preparation: the components of the BFe30-1-1 corrosion-resistant copper alloy and the components of impurity elements are controlled respectively to prepare the corrosion-resistant copper alloy disc with the required diameter;

[0040] Step two, substrate processing: using BFe30-1-1 corrosion-resistant copper alloy ingot or plate, through blanking, machining to obtain the substrate for surfacing that meets the size requirements;

[0041] Step three, GMAW surfacing: using the prepared corrosion-resistant copper alloy wire on a multifunctional welder for GMAW surfacing, after layer-by-layer surfacing, the desired height of the surfacing layer on the substrate is obtained;

[0042] Step four, non-destructive testing: after cutting the surfacing layer and the substrate, the surfacing layer is surface treated and detected, and the qualified surfacing sample is obtained;

[0043] Step five, room temperature impact energy test: sample the surfacing sample, process the sample according to the provisions and carry out impact test, and obtain the desired BFe30-1-1 corrosion-resistant copper alloy with high impact energy.

[0044] Among them, step five includes: room temperature impact energy test: sample the surfacing sample, process the sample according to the provisions of GB / T 229-2020 "Metallic materials Charpy pendulum impact test method" and carry out impact test, record the impact energy value of the sample; obtain the desired BFe30-1-1 corrosion-resistant copper alloy with high impact energy. The impact energy value is recorded as impact energy KV2. In this embodiment, high impact energy refers to an impact energy environment of ≥240J.

[0045] Through the five processes of wire preparation, substrate processing, GMAW surfacing, non-destructive testing and room temperature impact energy test, the preparation method of copper alloy can be optimized, the copper alloy has high impact energy performance, the safety and reliability of BFe30-1-1 corrosion-resistant copper alloy in impact environment are improved, and the stability of the preparation method is ensured. And successfully realized the preparation of BFe30-1-1 corrosion-resistant copper alloy with high impact energy (≥240J), with the characteristics of good process stability.

[0046] Step one includes:

[0047] Step S11: respectively selecting each element in each component and impurity element of BFe30-1-1 corrosion-resistant copper alloy according to weight ratio control;

[0048] Step S12: prepare the desired diameter of corrosion-resistant copper alloy wire through the required process.

[0049] In step S11, the weight ratio of each element in the impurity elements is: P≤0.02 wt%, Pb≤0.02 wt%, Si≤0.15 wt%, S≤0.01 wt%, C≤0.04 wt%, and the total of other impurity elements≤0.1 wt%. In step S12, the diameter of the BFe30-1-1 corrosion-resistant copper alloy wire prepared is Φ1.2 mm, and the tolerance is ±0.06 mm. The required process includes a drawing forming process. Through the required process, the cast ingot obtained by casting can be prepared into a wire through an n-pass drawing process; n is a positive integer.

[0050] By controlling the composition of the corrosion-resistant copper alloy and the composition of each element in the impurity elements, the quality of the wire preparation can be effectively improved, and the strength of the wire preparation can be ensured. Unlike the prior art, which adds a plurality of expensive elements to improve the material performance, the present application can reduce the preparation cost of the alloy by optimizing the composition of the corrosion-resistant copper alloy.

[0051] In step two, the surface of the substrate needs to be smooth and clean. The thickness of the substrate for surfacing is ≥30 mm.

[0052] By controlling the thickness of the substrate, the deformation caused by thermal stress during surfacing can be reduced, which effectively protects the operation stability and safety during the subsequent surfacing process.

[0053] Step three includes:

[0054] Step S31: GMAW surfacing: using the prepared Φ1.2 mm corrosion-resistant copper alloy wire to perform GMAW surfacing on a multifunctional welder;

[0055] Step S32: After completing a layer of surfacing, remove the oxides on the surface of the completed surfacing layer; and detect the height of the current surfacing layer;

[0056] Step S33: Determine whether the current surfacing height reaches the required surfacing height; if yes, obtain the required height of the surfacing layer on the substrate after layer-by-layer surfacing; execute step four; if no, return to step S31 to perform the next layer of surfacing.

[0057] In step S31, the parameter range of GMAW surfacing includes: the welding current of GMAW surfacing is 100A-300A; the arc voltage of GMAW surfacing is 15V-40V; and the welding speed of GMAW surfacing is 20cm / min-200cm / min.

[0058] By controlling the GMAW surfacing parameters, layer-by-layer surfacing of the wire on the substrate is realized, and after completing a layer of surfacing, the surfacing layer surface oxidation products are removed, and then the next layer of surfacing is carried out until the surfacing layer reaches the required height. The height of the surfacing layer is precisely controlled, and the influence of excessive or insufficient surfacing on the required corrosion-resistant copper alloy is avoided. Further, it is beneficial to improve the quality of surfacing, ensure the preparation efficiency of surfacing, and reduce the number of rework.

[0059] Step four includes:

[0060] Step S41: non-destructive testing: after cutting the surfacing layer and the substrate apart, the surfacing layer is surface treated;

[0061] Step S42: using the calibrated X-ray flaw detection equipment to detect the surfacing layer;

[0062] Step S43: determining whether the X-ray flaw detection result meets the II level qualified requirement specified in NB / T 47013.2-2023; if yes, a qualified surfacing sample is obtained, and step five is executed; if no, the current detected surfacing layer is unqualified.

[0063] In step S41, the surface treatment of the surfacing layer includes slightly polishing the surfacing layer surface to remove oxidation products and unevenness affecting the flaw detection result.

[0064] Through non-destructive testing of the surfacing layer, unqualified surfacing samples can be preliminarily checked out, and the safety in the room temperature impact energy test process is improved. It is also beneficial to improve the stability of the process.

[0065] Example 1:

[0066] Step one, wire preparation:

[0067] A wire with a diameter of 1.2 mm is prepared, and the chemical composition is as follows: Fe is 0.559 wt%, Mn is 0.875 wt%, Ni is 31.21 wt%, Ti is 0.414 wt%, P < 0.005 wt%, Pb is 0.0067 wt%, Si < 0.01 wt%, S < 0.001 wt%, and copper is the balance.

[0068] Step two, substrate processing: a BFe30-1-1 corrosion-resistant copper alloy substrate with a length of 150 mm, a width of 120 mm, and a thickness of 60 mm is obtained by cutting and processing, and the substrate surface is a machined surface and is kept clean and smooth.

[0069] Step three, GMAW surfacing: the present application uses Φ1.2 mm BFe30-1-1 corrosion-resistant copper alloy wire on the TPS 600i intelligent welding machine for GMAW surfacing, and the surfacing parameters are as follows: welding current 263 A, arc voltage 21.9 V, and welding gun moving speed is kept at 80~120 cm / min. The surfacing layer basically covers the surface of the substrate, and after each layer of surfacing is completed, the surfacing layer surface oxidation products are removed using a hard brush, and then the next layer of surfacing is carried out. Finally, a BFe30-1-1 corrosion-resistant copper alloy surfacing layer with a thickness of about 25 mm is obtained.

[0070] Step four, non-destructive testing:

[0071] The GMAW surfacing layer is separated from the substrate using wire cutting processing, and the surfacing layer surface oxidation products and unevenness are removed by grinding. The XYD4510 / 2 type X-ray detector within the calibration qualified validity period is used, and the X-ray detection is carried out according to the method specified in NB / T 47013.2-2023, and the detection result meets the standard specified Ⅱ level qualified requirements.

[0072] Step five, room temperature impact energy test:

[0073] The samples are taken on the horizontal reference plane of the GMAW surfacing BFe30-1-1 corrosion-resistant copper alloy block, and the impact energy KV2 of the samples is determined according to the provisions of GB / T 229-2020, and the impact energy of 3 parallel samples is 251 J, 243 J and 253 J, and the average value is 249 J.

[0074] After the preparation method of the present application is applied to the preparation of corrosion-resistant copper alloy, it is found that the average impact energy of the prepared copper alloy is 249 J>240 J, so it is not difficult to see that the preparation method of the present application has excellent process stability, and can successfully realize the preparation of BFe30-1-1 corrosion-resistant copper alloy with high impact energy (≥240 J), and can improve the safety and reliability of BFe30-1-1 corrosion-resistant copper alloy in impact environment.

[0075] The above only describes the preferred embodiments of the present application and does not limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A BFe30-1-1 corrosion-resistant copper alloy with high impact energy, characterized in that: The components of the alloy are as follows in weight ratio: Fe 0.4 wt%-0.75 wt%, Mn 0.5 wt%-1.0 wt%, Ni 29.0 wt%-32.0 wt%, Ti 0.2 wt%-0.5 wt%, and the balance is copper.

2. A method for preparing a BFe30-1-1 corrosion-resistant copper alloy with high impact energy, characterized in that: The method is applied to prepare a BFe30-1-1 corrosion-resistant copper alloy with high impact energy as claimed in claim 1, and the method comprises the following steps: Step 1: Coil wire preparation: Control the composition of BFe30-1-1 corrosion-resistant copper alloy and the composition of impurity elements to prepare a corrosion-resistant copper alloy coil wire of the desired diameter; Step 2: Substrate processing: Use BFe30-1-1 corrosion-resistant copper alloy ingots or plates to obtain a surfacing substrate that meets the size requirements through blanking and machining; Step 3, GMAW surfacing: using the prepared corrosion-resistant copper alloy coil wire to perform GMAW surfacing on a multifunctional welding machine, after layer-by-layer surfacing processing, a surfacing layer of the required height is obtained on the substrate; Step 4: Non-destructive testing: After the cladding layer is separated from the substrate by cutting, the cladding layer is surface treated; and flaw detection is performed to obtain qualified cladding samples; Step 5: Room temperature impact energy test: Sample the surfacing specimens, process the specimens according to regulations, and conduct impact tests to obtain the required BFe30-1-1 corrosion-resistant copper alloy with high impact energy.

3. The method for preparing a BFe30-1-1 corrosion-resistant copper alloy with high impact energy according to claim 2, characterized in that: The step one comprises: Step S11: selecting various components of the corrosion-resistant copper alloy and various elements in the impurity elements according to weight ratio; Step S12: preparing the corrosion-resistant copper alloy coil wire of the required diameter through the required process.

4. The method for preparing a BFe30-1-1 corrosion-resistant copper alloy with high impact energy according to claim 3, characterized in that: In step S11, the weight ratio of each element in the impurity elements is: P≤0.02 wt%, Pb≤0.02 wt%, Si≤0.15 wt%, S≤0.01 wt%, C≤0.04 wt%, and the total of other impurity elements is ≤0.1 wt%.

5. The method for preparing a BFe30-1-1 corrosion-resistant copper alloy with high impact energy according to claim 3, characterized in that: In step S12, the diameter of the prepared BFe30-1-1 corrosion-resistant copper alloy coiled wire is Φ1.2 mm, and the tolerance is ±0.06 mm.

6. The method for preparing a BFe30-1-1 corrosion-resistant copper alloy with high impact energy according to claim 2, characterized in that: In the step 2, the thickness of the base plate for surfacing welding is ≥30 mm.

7. The method for preparing a BFe30-1-1 corrosion-resistant copper alloy with high impact energy according to claim 2, characterized in that: The step three includes: Step S31: GMAW surfacing: using the prepared corrosion-resistant copper alloy coiled wire to perform GMAW surfacing on a multifunctional welding machine; Step S32: After completing one layer of surfacing, remove the oxide on the surface of the completed surfacing layer; and detect the height of the current surfacing layer; Step S33: Determine whether the current surfacing height reaches the required surfacing height; if yes, proceed to step 4; if no, return to step S31 and proceed to the next layer of surfacing.

8. The method for preparing a BFe30-1-1 corrosion-resistant copper alloy with high impact energy according to claim 7, characterized in that: In step S31, the welding current of GMAW surfacing is in the range of 100A-300A.

9. The method for preparing a BFe30-1-1 corrosion-resistant copper alloy with high impact energy according to claim 7, characterized in that: In step S31, the arc voltage of GMAW surfacing is in the range of 15V-40V.

10. The method for preparing a BFe30-1-1 corrosion-resistant copper alloy with high impact energy according to claim 2, characterized in that: The fourth step includes: Step S41: non-destructive testing: after the cladding layer is cut and separated from the substrate, the cladding layer is subjected to surface treatment; Step S42: using a calibrated X-ray flaw detection device to perform flaw detection on the weld overlay layer; Step S43: Determine whether the X-ray inspection result meets the Level II qualification requirements specified in NB / T 47013.2-2023; if yes, obtain a qualified cladding sample and execute step 5; if no, the currently inspected cladding layer fails.

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