Method for manufacturing different hardness regions on a steel sheet surface

Abstract

The application discloses a kind of production methods of different hardness regions of steel plate surface, it is related to steel hardness detection technical field, comprising: obtaining two steel samples of same size;Several hard positioning points are evenly set on the surface of each sample;Different yield strength electrode is used to weld the hard positioning points one by one.The application sets multiple hard positioning points on the surface of the intercepted steel sample, and uses different yield strength electrode to weld at the corresponding hard positioning point, and then heat treatment is carried out on the sample to form multiple regions with different hardness values on the surface of the steel sample, thereby providing solid data support and reference basis for the surface hard block detection intelligent system of steel plate.

Description

Technical Field

[0001] This invention relates to the field of steel hardness testing technology, and in particular to a method for fabricating different hardness zones on the surface of a steel plate. Background Technology

[0002] With the rapid development of industry, the requirements for material properties are becoming increasingly stringent, especially in fields such as petroleum, chemical, and mining. In these fields, the surface hardness of steel plates has become one of the key indicators for measuring their wear resistance and corrosion resistance. Although the traditional flame gun local heating method can improve the surface hardness of steel plates to a certain extent, it has many limitations, such as uneven heating and inaccurate hardness control, making it difficult to meet the high-precision and high-consistency industrial testing requirements.

[0003] Customers are increasingly demanding strict requirements for testing the hardness of the entire surface of steel plates. To meet this market need, it is particularly urgent to develop a production technology that can precisely control the hardness value of a certain area on the surface of a steel plate. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a method for manufacturing different hardness regions on the surface of a steel plate.

[0005] To solve the above technical problems, the technical solution of the present invention is as follows:

[0006] A method for manufacturing different hardness zones on the surface of a steel plate includes:

[0007] Obtain two steel samples of the same size;

[0008] Several hard positioning points are evenly opened on the surface of each sample;

[0009] The hard positioning points were welded one by one using welding electrodes with different yield strengths.

[0010] As a preferred embodiment of the method for manufacturing different hardness regions on the surface of the steel plate according to the present invention, wherein: a plurality of hard positioning points on the sample are arranged in a matrix;

[0011] The diameters of several hard locating points in any row are all equal, and the diameters of the hard locating points in different rows increase sequentially.

[0012] In a preferred embodiment of the method for manufacturing different hardness regions on the surface of the steel plate according to the present invention, the number of welding rods is equal to the sum of the number of rows of hard positioning points in the two samples.

[0013] As a preferred embodiment of the method for manufacturing different hardness regions on the surface of the steel plate according to the present invention, the step of welding the hard positioning points one by one with welding electrodes of different yield strengths includes:

[0014] Use any welding rod to weld any row of the hard positioning points in any sample.

[0015] Use any unused welding rod to weld any row of the hard positioning points in any sample that has not been welded.

[0016] Repeat the previous step until all welding rods have been welded to the hard locating points.

[0017] As a preferred embodiment of the method for manufacturing different hardness regions on the surface of the steel plate according to the present invention, wherein: the number of rows and columns of the hard positioning points in any sample are three; in two samples, the diameter of the hard positioning points in the row with the smallest diameter is 8.7 mm, the diameter of the hard positioning points in the row with the middle diameter is 10 mm, and the diameter of the hard positioning points in the row with the largest diameter is 14 mm.

[0018] In a preferred embodiment of the method for manufacturing different hardness regions on the surface of the steel plate according to the present invention, the number of welding rods is six, and the yield strengths of the six welding rods are 500MPa, 600MPa, 700MPa, 800MPa, 900MPa and 1000MPa, respectively.

[0019] As a preferred embodiment of the method for manufacturing different hardness regions on the surface of the steel plate according to the present invention, the step of obtaining two steel samples of the same size includes:

[0020] Two steel samples of the same size were cut from the head and tail of the steel.

[0021] In a preferred embodiment of the method for manufacturing different hardness regions on the surface of the steel plate described in this invention, the length and width of any of the samples are both 120 mm.

[0022] The beneficial effects of this invention are:

[0023] This invention creates multiple hard positioning points on the surface of a cut steel sample and welds them onto the corresponding hard positioning points using welding rods with different yield strengths. After heat treatment of the sample, multiple regions with different hardness values ​​can be formed on the surface of the steel sample, thus providing solid data support and reference for an intelligent system for detecting surface hard blocks in steel plates. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 A schematic flowchart illustrating the method for manufacturing different hardness regions on the surface of a steel plate provided by the present invention;

[0026] Figure 2 This is a schematic diagram of a steel sample;

[0027] Figure 3 This is a schematic diagram of the hardness regions on the surface of a steel sample prepared by the method for creating different hardness regions on the surface of a steel plate provided by the present invention. Detailed Implementation

[0028] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0029] This application provides a method for fabricating different hardness zones on the surface of a steel plate. See [link to relevant documentation]. Figure 1 The method specifically includes the following steps:

[0030] Step S101: Obtain two steel samples of the same size.

[0031] Specifically, in this embodiment, steel material is first obtained, and then a steel sample with a length of 120mm and a width of 120mm is cut from its head and tail.

[0032] Step S102: Evenly open several hard positioning points on the surface of each sample.

[0033] Specifically, the hard positioning points on each sample are arranged in a matrix. Furthermore, the diameters of the hard positioning points in any row are all equal, and the diameters of the hard positioning points in different rows increase sequentially.

[0034] See Figure 2 In this embodiment, the hard positioning points within each steel sample are arranged in a matrix, with three rows and three columns. Within each steel sample, the bottom row of hard positioning points has the smallest diameter, the top row has the largest diameter, and the middle row has a centered diameter. Furthermore, within two steel samples, the diameters of corresponding rows of hard positioning points are equal; that is, the bottom two rows of hard positioning points have equal diameters, the top two rows have equal diameters, and the middle two rows have equal diameters.

[0035] In this embodiment, within the two samples, the smallest row of hard locating points has a diameter of 8.7 mm, the middle row has a diameter of 10 mm, and the largest row has a diameter of 14 mm. When creating hard locating points on the surface of each steel sample, three rows and three columns of hard locating points are evenly arranged at 30 mm intervals, for a total of nine hard locating points.

[0036] In this embodiment, the depth of all hard positioning points is 5mm.

[0037] Step S103: Weld the hard positioning points one by one using welding rods with different yield strengths, and perform standard heat treatment on the sample after welding.

[0038] Specifically, welding electrodes with different yield strengths are used to weld each row of hard locating points one by one. It should be noted that the number of welding electrodes is equal to the sum of the number of rows of hard locating points in the two samples. That is, in this embodiment, the number of welding electrodes is six. Therefore, the specific steps for welding each row of hard locating points one by one using welding electrodes with different yield strengths are as follows:

[0039] Step S103a: Select any welding rod to weld any row of the hard positioning points in any sample.

[0040] Step S103b: Select any unused welding rod to weld any row of the hard positioning points in any sample that has not been welded.

[0041] Step S103c: Repeat step S103b until all welding electrodes are welded to the hard locating points.

[0042] In this embodiment, the yield strengths of the six welding electrodes are 500MPa, 600MPa, 700MPa, 800MPa, 900MPa and 1000MPa, respectively.

[0043] After all welding electrodes have been welded to the corresponding hard locating points, the samples undergo a standard heat treatment process to obtain different hardness values ​​for different areas of the surface, such as... Figure 3 As shown, a range of steel plate surface hardness values ​​between 225HV and 365HV was produced to meet specific industrial application requirements.

[0044] After the heat treatment process, the sample surface is finely polished to ensure the accuracy of the test results. Subsequently, using specialized hardness testing equipment, the HV and HRC hardness values ​​are measured at multiple preset testing points on the sample. By systematically analyzing this data, the effectiveness of this invention in producing different hardness values ​​can be scientifically evaluated, thus providing solid data support and reference for the intelligent system for detecting surface hardness blocks in steel plates.

[0045] As can be seen, the technical solution of this application creates multiple hard positioning points on the surface of the cut steel sample and welds them onto the corresponding hard positioning points using welding rods with different yield strengths. After heat treatment of the sample, multiple areas with different hardness values ​​can be formed on the surface of the steel sample, thereby providing solid data support and reference for the intelligent system for detecting surface hard blocks of steel plates.

[0046] In addition to the above embodiments, the present invention may have other implementation methods; all technical solutions formed by equivalent substitution or equivalent transformation fall within the protection scope claimed by the present invention.

Claims

1. A method for manufacturing different hardness zones on the surface of a steel plate, characterized in that: include: Obtain two steel samples of the same size, with the length and width of each sample being 120 mm. Several hard positioning points are uniformly opened on the surface of each sample. The hard positioning points on the sample are arranged in a matrix. The diameter of the hard positioning points in any row is equal, and the diameter of the hard positioning points in different rows increases sequentially. The number of rows and columns of the hard positioning points in any sample is three. In two samples, the diameter of the hard positioning points in the row with the smallest diameter is 8.7 mm, the diameter of the hard positioning points in the row with the middle diameter is 10 mm, and the diameter of the hard positioning points in the row with the largest diameter is 14 mm. The depth of all hard positioning points is 5 mm. The hard positioning points were welded one by one using welding rods with different yield strengths. There were six welding rods, and the yield strengths of the six welding rods were 500MPa, 600MPa, 700MPa, 800MPa, 900MPa and 1000MPa, respectively. After that, the sample was heat-treated to form multiple areas with different hardness values ​​on the surface of the steel sample, and the hardness values ​​were between 225HV and 365HV. The step of welding the hard positioning points one by one with welding electrodes of different yield strengths includes: Use any welding rod to weld any row of the hard positioning points in any sample. Use any unused welding rod to weld any row of the hard positioning points in any sample that has not been welded. Repeat the previous step until all welding rods have been welded to the hard locating points.

2. The method for manufacturing different hardness regions on the surface of a steel plate according to claim 1, characterized in that: The process of obtaining two steel samples of the same size includes: Two steel samples of the same size were cut from the head and tail of the steel.

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