Nitride alloy cored wire

Abstract

The utility model discloses a nitralloy cored wire, and belongs to the technical field of nitralloy materials. The cored wire comprises an outer sheath formed by a metal belt, and the outer sheath formed by the metal belt extends in the length direction and bends towards the two sides in the width direction to form a containing cavity; the accommodating cavity is filled with the granular and / or powdery filling material, and the accommodating cavity is sealed by the outer sheath through a seam or a folded edge extending along the length of the core-spun yarn; the volume of the containing cavity is composed of the volume of the filling material and the volume of a gap, and the ratio of the volume of the gap is 19-62% per unit length.

Description

Technical Field

[0001] The utility model belongs to the technical field of nitrided alloy materials, and more specifically, relates to a nitrided alloy cored wire. Background Art

[0002] Nitrided alloy is an alloy widely used in the process of steel smelting. In today's steel production, in order to improve the strength of steel, ferrovanadium or ferroniobium and other alloys need to be added during the steelmaking process through microalloying to achieve this effect. In order to give full play to the microalloy strengthening effect of vanadium and niobium, generally an appropriate amount of nitrided alloy needs to be added during steelmaking to form strong carbonitrides with microalloying elements niobium and vanadium, and improve the precipitation strengthening and precipitation hardening effects of microalloying elements. Therefore, the use of nitrided alloy in steel smelting is relatively extensive. Currently, there are mainly three methods for vanadium-nitrogen microalloying: 1) adding vanadium-nitrogen alloy; 2) adding ferrovanadium and adding a nitrogen increasing agent (such as silicon nitride alloy) during the smelting process; 3) adding ferrovanadium and blowing nitrogen during the smelting process.

[0003] Among them, the cored wire technology is a technical method for adding nitrided alloy into molten steel. Its use process is to first crush various additive raw materials (such as deoxidizer, desulfurizer, modifier, alloy materials, etc.) to be added into molten steel or molten iron into powders of a certain particle size, and then wrap them with cold-rolled low-carbon steel (or non-ferrous metal) strips to form a composite material of any length (i.e., cored wire). Then, with the help of a wire feeding machine, the cored wire of a specified length is sent into the molten steel through the slag layer at a certain speed and inserted to a certain depth. As the cored wire continuously melts at a certain place in the molten steel, the additives wrapped by it will also be continuously melted into the molten steel or molten iron, interact with the surrounding molten steel or molten iron, and perform deoxidation, desulfurization, microalloying, composition fine-tuning, and modification on the molten liquid to be treated, so as to improve the service performance of the molten metal to be treated and improve its cleanliness.

[0004] Related technical solutions for cored wires have been publicly disclosed, such as: the technical solution of an invention named "A cored wire for vanadium-nitrogen microalloying and composite deoxidation in metallurgy" with the Chinese patent application number 201210377151.X and the publication date of October 8, 2012; the technical solution of an invention named "A silicon nitride manganese cored wire for nitrogen increasing in vanadium microalloyed steel" with the Chinese patent application number 201410131544.1 and the publication date of April 3, 2014; the technical solution of an invention named "A cored wire for vanadium-nitrogen microalloying and composite deoxidation in metallurgy" with the Chinese patent application number 201320280835.8 and the publication date of May 22, 2013.

[0005] However, for the cored wires disclosed in the above patents, the service performance cannot meet the usage requirements, so there is still room for further improvement in the structure. Summary of the Invention

[0006] 1. Problem to be Solved

[0007] In view of the problems existing in the existing cored wire, one of the purposes of the present utility model is to provide a nitride alloy cored wire, optimize the structure of the cored wire, and improve the use effect.

[0008] 2. Technical Solution

[0009] In order to solve the above problems, the technical solutions adopted by the present utility model are as follows:

[0010] The first aspect of the present utility model provides a nitride alloy cored wire, including:

[0011] An outer sheath formed by a metal strip, and the outer sheath formed by the metal strip extends along the length direction and bends to both sides in the width direction to form a receiving cavity;

[0012] Granular and / or powdery filling materials filled in the receiving cavity, wherein the outer sheath closes the receiving cavity by a seam or a hem extending along the length of the cored wire;

[0013] The volume of the receiving cavity consists of the volume of the filling material and the void volume, and per unit length, the proportion of the void volume is 19-62%.

[0014] The above-mentioned granular and / or powdery filling materials include at least one nitride or nitride alloy, and the nitride or nitride alloy includes vanadium nitride, silicon nitride, manganese nitride, titanium nitride, chromium nitride, boron nitride, silicomanganese nitride, zirconium nitride, niobium nitride, etc.

[0015] According to any embodiment of the first aspect of the purpose of the present utility model, the metal strip material of the outer sheath is a composite layer of low-carbon steel and aluminum, low-carbon steel or pure iron, wherein the thickness of the outer sheath is 0.2-2.0 mm, preferably, the thickness of the outer sheath is 0.2-0.8 mm or 0.8-1.2 mm or 1.2-2.0 mm.

[0016] According to any embodiment of the first aspect of the purpose of the present utility model, the outer sheath is a low-carbon steel outer sheath, so that the composition of the finished steel is interfered as little as possible by the carbon in the outer sheath.

[0017] According to any embodiment of the first aspect of the present invention, per unit length, the granular and / or powdered filler material accounts for 23% to 82% of the total cored wire weight, with specific values being 19%, 20%, 21%, 22%, 23%, 24%, 25%, 26%, 27%, 28%, 29%, 30%, 31%, 32%, 33%, 34%, 35%, 36%, 37%, 38%, 39%, 40%, 42%, 45%, 48%, 50%, 52%, 55%, 58%, 60%, 65%, 68%, 70%, 72%, 75%, 78%, 80%, and 82%. Due to the different materials and thicknesses of the outer jacket and the different densities of the filler material, the weight proportion of the outer jacket will vary with the material and thickness.

[0018] According to any embodiment of the first aspect of the present invention, the outer sheath closes the accommodating cavity by a seam extending along the length of the cored wire, so that the cross-section of the cored wire is substantially circular.

[0019] 3. Beneficial effects

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] (1) In the nitride alloy cored wire of the present invention, especially when the cored wire is in a closed state, the air in the void volume will participate in the reaction, thereby reducing the yield of the nitride alloy. By controlling the proportion of the void volume, the oxidation resistance of the cored wire is improved, thereby improving the yield of the nitride alloy;

[0022] (2) The nitride alloy cored wire of the present invention can achieve an appropriate hardness of the cored wire by controlling the porosity of the filling material (wire core material), and can accurately implement the wire feeding process to ensure that problems such as wire jamming and wire breakage do not occur during the wire feeding process as much as possible, thereby improving the stability of the microalloying effect of the nitride alloy on steel grades (such as high-strength steels such as HRB500(E), HRB400(E), and HRB600). BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The technical solutions of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. However, it should be understood that these drawings are designed for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, unless otherwise specified, these drawings are intended only to conceptually illustrate the structures described herein and are not necessarily drawn to scale.

[0024] Figure 1 This is a physical diagram of Example 1 of the nitride alloy cored wire of the present utility model;

[0025] Figure 2 This is a schematic structural diagram of Example 1 of the nitride alloy cored wire of the present invention;

[0026] Figure 3 This is a schematic structural diagram of Embodiment 2 of the nitrogen alloy cored wire of the present utility model;

[0027] Figure 4 This is a schematic structural diagram of Embodiment 2 of the nitrogen alloy cored wire of the present utility model.

[0028] Explanation of reference numerals:

[0029] 100, outer sheath; 110, accommodation cavity; 111, gap; 120, seam; 130, hem; 200, filling material. Detailed implementation manners

[0030] The present disclosure can be more easily understood by referring to the following description in combination with the accompanying drawings and examples, all of which form a part of the present disclosure. It should be understood that the present disclosure is not limited to the specific products, methods, conditions or parameters described and / or illustrated herein. Further, the terms used herein are for the purpose of describing specific embodiments by way of example only and are not intended to be limiting, unless otherwise specified.

[0031] It should also be understood that, for the sake of clarity, certain features of the present disclosure may be described herein in the context of separate embodiments, but may also be provided in combination with each other in a single embodiment. That is, unless clearly incompatible or specifically excluded, each separate embodiment is considered combinable with any other embodiment, and such combination is considered to represent another different embodiment. Conversely, for the sake of brevity, the various features of the present disclosure described in the context of a single embodiment may also be provided separately or in any sub-combination. Finally, although a particular embodiment may be described as part of a series of steps or part of a more general structure, each step or sub-structure itself may also be considered an independent embodiment.

[0032] Unless otherwise specified, it should be understood that each individual element in a list and each combination of the individual elements in the list will be construed as a different embodiment. For example, a list of embodiments represented as "A, B, or C" should be construed as including embodiments "A", "B", "C", "A or B", "A or C", "B or C", or "A, B, or C".

[0033] In the present disclosure, the singular forms of the articles "a", "an", and "the" also include the corresponding plural referents, and a reference to a particular numerical value includes at least that particular value, unless the context clearly indicates otherwise. Thus, for example, a reference to "a substance" is a reference to at least one of such substance and its equivalents.

[0034] Terms including ordinal numbers such as “first” and “second” may be used to explain various components or fluids, but these components and fluids are not limited by these terms. Thus, without departing from the teachings of the present disclosure, these terms are only used to distinguish one component / fluid from another component / fluid.

[0035] When describing items by using associative terms such as “... and / or...” etc., the description should be understood to include any one of the associated listed items and all combinations of one or more of them.

[0036] Generally, the use of the term “about” indicates an approximation that may vary according to the desired characteristics obtained through the disclosed subject matter and will be interpreted in a context-dependent manner based on functionality. Thus, one of ordinary skill in the art will be able to interpret a certain degree of difference on a case-by-case basis. In some cases, the number of significant digits used when expressing a particular value may be a representative technique for determining the difference allowed by the term “about”. In other cases, a gradient within a series of values may be used to determine the range of difference allowed by the term “about”. Further, all ranges in the present disclosure are inclusive and combinable, and references to values stated in a range include each value within that range.

[0037] Example 1

[0038] As Figure 1 and Figure 2 shown, the nitride alloy cored wire of this embodiment includes an outer sheath 100 formed by a metal strip, and the outer sheath 100 formed by the metal strip extends along the length (X) direction and bends to both sides in the width (Y) direction to form a receiving cavity 110; the specific metal strip may be in the form of a continuous metal strip, which is initially flat (e.g., a flat cross-section), and it can be roll-formed to shape the profile of the metal strip and finally form an enclosed tubular shape to completely enclose (forming a seam); granular and / or powdery filling material 200 filled in the receiving cavity 110.

[0039] The above-mentioned granular and / or powdery filling material 200 includes vanadium nitride, silicon nitride, titanium nitride, silicomanganese nitride, niobium nitride, and so on.

[0040] Wherein the outer sheath 100 closes the receiving cavity 110 by a seam 120 extending along the length of the cored wire; the volume of the receiving cavity 110 is composed of the volume of the filling material 200 and the volume of the void 111; for the volume of the above-mentioned receiving cavity 110, the volume of the filling material 200, and the volume of the void 111, a unit length (1 m) can be adopted. First, measure the volume of the receiving cavity 110, then measure the volume of the filling material 200, and then calculate the difference to obtain the corresponding data ratio.

[0041] Measure the data of the cored wire in this embodiment. Select the effective diameter of the cored wire to be 13 mm. After measuring the unit length (the length is 1 m), the average proportion of the volume of the void 111 is 19%.

[0042] Serial number <![CDATA[Volume of accommodation cavity / m 3 > <![CDATA[Void volume / m 3 > Proportion / % 1# <![CDATA[132.75*10 -6 > <![CDATA[26.948*10 -6 > 20.3 2# <![CDATA[132.69*10 -6 > <![CDATA[25.343*10 -6 > 19.1

[0043] Since most of the filling materials 200 are in granular or powder form, the cored wire is usually not 100% filled. Excessive voids 111 in the cored wire will affect the reaction of the cored wire in steel. Especially when the cored wire is in a closed state, the air in the volume of the void 111 will participate in the reaction, thus reducing the recovery rate of the nitriding alloy.

[0044] In this embodiment, the metal strip material of the outer sheath 100 is low-carbon steel so that the composition of the finished steel is interfered as little as possible by the carbon in the outer sheath 100; the thickness of the outer sheath 100 is 0.2 mm, 0.5 mm, 0.8 mm, 1 mm or 1.5 mm.

[0045] In addition, for the cored wire of the same batch, after intercepting the unit length and weighing, it is obtained that the average value of the granular and / or powdery filling material 200 accounting for the total weight of the cored wire is about 75%.

[0046] Combined with the attached Figure 1 As shown, the outer sheath 100 is closed by a seam 120 extending along the length of the cored wire to enclose the receiving cavity 110, so that the cross-sectional shape of the cored wire is basically circular.

[0047] Embodiment 2

[0048] As Figure 3 and Figure 4 shown, the structure of this embodiment is basically the same as that of Embodiment 1. The difference is that the outer sheath 100 is closed by a hem 130 extending along the length of the cored wire to enclose the receiving cavity 110.

[0049] The above-mentioned granular and / or powdery filling material 200 includes at least one nitride or nitriding alloy, and the nitrides include vanadium nitride, silicon nitride, silicomanganese nitride, titanium nitride, etc.

[0050] Wherein the outer sheath 100 is closed by a seam 120 extending along the length of the cored wire to enclose the receiving cavity 110; the volume of the receiving cavity 110 is composed of the volume of the filling material 200 and the volume of the void 111; for the volume of the above-mentioned receiving cavity 110, the volume of the filling material 200 and the volume of the void 111, the unit length (1 m) can be adopted. First, measure the volume of the receiving cavity 110, then measure the volume of the filling material 200, and then calculate the difference to obtain the corresponding data ratio.

[0051] Measure the data of the cored wire in this embodiment. The effective diameter of the cored wire is 13 mm. After measuring the unit length (1 m), the average proportion of the volume of the void 111 is 62%.

[0052] Serial number <![CDATA[Volume of accommodation cavity / m 3 > <![CDATA[Void volume / m 3 > Proportion / % 1# <![CDATA[130.15*10 -6 > <![CDATA[81.05*10 -6 > 62.3 2# <![CDATA[131.98*10 -6 > <![CDATA[81.432*10 -6 > 61.7

[0053] Since most of the filling materials 200 are in granular or powder form, the cored wire is usually not 100% filled. Excessive voids 111 in the cored wire will affect the reaction of the cored wire in steel. Especially when the cored wire is in a closed state, the air in the volume of the voids 111 will participate in the reaction, thus reducing the recovery rate of the nitriding alloy.

[0054] In this embodiment, the metal strip material of the outer sheath 100 is a composite layer of low-carbon steel and aluminum, and aluminum can be used as a deoxidizer; the thickness of the outer sheath 100 is 0.2 mm, 0.3 mm or 0.5 mm.

[0055] In addition, for the cored wires of the same batch, after intercepting and weighing the unit length, it is obtained that the average value of the granular and / or powdery filling materials 200 accounting for the total weight of the cored wire is about 34%.

[0056] Combined with the attached Figure 3 As shown, the outer sheath 100 is closed by the hem 130 extending along the length of the cored wire to enclose the accommodation cavity 110, so that the cross-sectional shape of the cored wire is basically circular.

[0057] Example 3

[0058] Measure the data of the cored wire in this embodiment. The effective diameter of the cored wire is 13 mm. After measuring the unit length (1 m), the average proportion of the volume of the void 111 is 20%.

[0059] Example 4

[0060] Measure the data of the cored wire in this embodiment. The effective diameter of the cored wire is 13 mm. After measuring the unit length (1 m), the average proportion of the volume of the void 111 is 21%.

[0061] Example 5

[0062] Measure the data of the cored wire in this embodiment. The effective diameter of the cored wire is 13 mm. After measuring the unit length (1 m), the average proportion of the volume of the void 111 is 22%.

[0063] Example 6

[0064] Measure the data of the cored wire in this embodiment. The effective diameter of the cored wire is 13 mm. After measuring the unit length (1 m), the average proportion of the volume of the void 111 is 23%.

[0065] Example 7

[0066] The cored wire of this example was measured. The effective diameter of the cored wire is 13 mm. After measuring the unit length (1 m), the average proportion of the volume of the void 111 is 24%.

[0067] Example 8

[0068] The cored wire of this example was measured. The effective diameter of the cored wire is 13 mm. After measuring the unit length (1 m), the average proportion of the volume of the void 111 is 25%.

[0069] Example 9

[0070] The cored wire of this example was measured. The effective diameter of the cored wire is 13 mm. After measuring the unit length (1 m), the average proportion of the volume of the void 111 is 26%.

[0071] Example 10

[0072] The cored wire of this example was measured. The effective diameter of the cored wire is 13 mm. After measuring the unit length (1 m), the average proportion of the volume of the void 111 is 27%.

[0073] Example 11

[0074] The cored wire of this example was measured. The effective diameter of the cored wire is 13 mm. After measuring the unit length (1 m), the average proportion of the volume of the void 111 is 28%.

[0075] Example 12

[0076] The cored wire of this example was measured. The effective diameter of the cored wire is 13 mm. After measuring the unit length (1 m), the average proportion of the volume of the void 111 is 29%.

[0077] Example 13

[0078] The cored wire of this example was measured. The effective diameter of the cored wire is 13 mm. After measuring the unit length (1 m), the average proportion of the volume of the void 111 is 30%.

[0079] Example 14

[0080] The cored wire of this example was measured. The effective diameter of the cored wire is 13 mm. After measuring the unit length (1 m), the average proportion of the volume of the void 111 is 31%.

[0081] Example 15

[0082] The cored wire of this embodiment is measured for data. The effective diameter of the cored wire is 13 mm. After measuring the unit length (1 m), the average proportion of the volume of the void 111 is 32%.

[0083] Example 16

[0084] The cored wire of this embodiment is measured for data. The effective diameter of the cored wire is 13 mm. After measuring the unit length (1 m), the average proportion of the volume of the void 111 is 33%.

[0085] Example 17

[0086] The cored wire of this embodiment is measured for data. The effective diameter of the cored wire is 13 mm. After measuring the unit length (1 m), the average proportion of the volume of the void 111 is 34%.

[0087] Example 18

[0088] The cored wire of this embodiment is measured for data. The effective diameter of the cored wire is 13 mm. After measuring the unit length (1 m), the average proportion of the volume of the void 111 is 35%.

[0089] Example 19

[0090] The cored wire of this embodiment is measured for data. The effective diameter of the cored wire is 13 mm. After measuring the unit length (1 m), the average proportion of the volume of the void 111 is 36%.

[0091] Example 20

[0092] The cored wire of this embodiment is measured for data. The effective diameter of the cored wire is 13 mm. After measuring the unit length (1 m), the average proportion of the volume of the void 111 is 37%.

[0093] Example 21

[0094] The cored wire of this embodiment is measured for data. The effective diameter of the cored wire is 13 mm. After measuring the unit length (1 m), the average proportion of the volume of the void 111 is 38%.

[0095] Example 22

[0096] The cored wire of this embodiment is measured for data. The effective diameter of the cored wire is 13 mm. After measuring the unit length (1 m), the average proportion of the volume of the void 111 is 40%.

[0097] Example 23

[0098] Measure the data of the cored wire in this embodiment. The effective diameter of the cored wire is 13 mm. After measuring the unit length (1 m), the average proportion of the volume of the void 111 is 42%.

[0099] Example 24

[0100] Measure the data of the cored wire in this embodiment. The effective diameter of the cored wire is 13 mm. After measuring the unit length (1 m), the average proportion of the volume of the void 111 is 45%.

[0101] Example 25

[0102] Measure the data of the cored wire in this embodiment. The effective diameter of the cored wire is 13 mm. After measuring the unit length (1 m), the average proportion of the volume of the void 111 is 48%.

[0103] Example 26

[0104] Measure the data of the cored wire in this embodiment. The effective diameter of the cored wire is 13 mm. After measuring the unit length (1 m), the average proportion of the volume of the void 111 is 50%.

[0105] Example 27

[0106] Measure the data of the cored wire in this embodiment. The effective diameter of the cored wire is 13 mm. After measuring the unit length (1 m), the average proportion of the volume of the void 111 is 52%.

[0107] Example 28

[0108] Measure the data of the cored wire in this embodiment. The effective diameter of the cored wire is 13 mm. After measuring the unit length (1 m), the average proportion of the volume of the void 111 is 55%.

[0109] Example 29

[0110] Measure the data of the cored wire in this embodiment. The effective diameter of the cored wire is 13 mm. After measuring the unit length (1 m), the average proportion of the volume of the void 111 is 57%.

[0111] Example 30

[0112] Measure the data of the cored wire in this embodiment. The effective diameter of the cored wire is 13 mm. After measuring the unit length (1 m), the average proportion of the volume of the void 111 is 59%.

[0113] Example 31

[0114] Measure the data of the cored wire in this embodiment. The effective diameter of the cored wire is 13 mm. After measuring the unit length (1 m), the average proportion of the volume of the void 111 is 61%.

[0115] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this utility model belongs; the terms and / or combinations used herein include any and all combinations of one or more related listed items.

Claims

1. A nitride alloy cored wire, characterized in that, Comprising: An outer sheath (100) formed by a metal strip, the outer sheath (100) formed by the metal strip extends along the length direction and bends towards both sides in the width direction to form a receiving cavity (110); Granular filling material (200) filled in the receiving cavity (110), wherein the outer sheath (100) closes the receiving cavity (110) by a seam (120) or a hem (130) extending along the length of the cored wire; The volume of the receiving cavity (110) consists of the volume of the filling material (200) and the volume of the voids (111), and for each unit length, the proportion of the volume of the voids (111) is 19 - 62%; The granular filling material includes vanadium nitride, silicon nitride, manganese nitride, titanium nitride, chromium nitride, boron nitride, silicon manganese nitride, zirconium nitride or niobium nitride.

2. The cored wire of nitride alloy according to claim 1, wherein The metal strip material of the outer sheath (100) is low-carbon steel or pure iron, and the thickness of the outer sheath (100) is 0.2 - 2.0 mm.

3. The cored wire of nitrided alloy according to claim 1, characterized in that, The cored wire of nitriding alloy according to claim 2, wherein the thickness of the outer sheath (100) is 0.2 - 0.8 mm or 0.8 - 1.2 mm or 1.2 - 2.0 mm.

4. The cored wire of nitride alloy according to claim 3, characterized in that, The outer sheath (100) is a low-carbon steel outer sheath (100).

5. The cored wire of nitrided alloy according to any one of claims 1-4, characterized in that The outer sheath (100) closes the receiving cavity (110) by a seam (120) extending along the length of the cored wire, so that the cross-sectional shape of the cored wire is substantially circular.

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