CN115078144A - Method for detecting hardness performance of pyrophyllite block - Google Patents
Method for detecting hardness performance of pyrophyllite block Download PDFInfo
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- CN115078144A CN115078144A CN202210699011.8A CN202210699011A CN115078144A CN 115078144 A CN115078144 A CN 115078144A CN 202210699011 A CN202210699011 A CN 202210699011A CN 115078144 A CN115078144 A CN 115078144A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/40—Investigating hardness or rebound hardness
- G01N3/42—Investigating hardness or rebound hardness by performing impressions under a steady load by indentors, e.g. sphere, pyramid
- G01N3/44—Investigating hardness or rebound hardness by performing impressions under a steady load by indentors, e.g. sphere, pyramid the indentors being put under a minor load and a subsequent major load, i.e. Rockwell system
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0076—Hardness, compressibility or resistance to crushing
- G01N2203/0078—Hardness, compressibility or resistance to crushing using indentation
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Abstract
The invention relates to a method for detecting hardness performance of pyrophyllite blocks. In the detection method, a Rockwell hardness tester is used for detecting key point positions on the specific surface of the pyrophyllite block by matching the total test stress with different sizes with the Rockwell steel ball pressure heads with different diameters aiming at a plurality of pyrophyllite blocks with the same type and different specifications, stable and reliable measurement data are obtained on the premise that the pyrophyllite block is not damaged and the subsequent synthesis use is not influenced, the measured hardness data is effectively analyzed, abnormal values are removed, the stability of the data is determined, and a standard hardness interval of the pyrophyllite block with the corresponding specification is established; after the standard hardness interval is established, the hardness of the pyrophyllite block to be detected is detected, and the detected hardness data is compared with the standard hardness interval, so that the soft and hard uniformity of the pyrophyllite block can be effectively evaluated under the condition that the performance and the use of the pyrophyllite block are not influenced.
Description
Technical Field
The invention relates to the technical field of hardness testing, in particular to a method for detecting hardness performance of a pyrophyllite block.
Background
With the development of modern industry and technology, the demand of industrial production for artificial superhard materials is continuously increased, and the production, quality and application scale of the superhard materials are greatly developed in recent decades. The pyrophyllite block has good pressure transmission, heat resistance, heat preservation, insulation and sealing performances, and is the most widely and most critical production auxiliary material in the production process of superhard materials.
The pyrophyllite block is different from a metal material, the uniformity inside the block body is difficult to guarantee in the production process, the block body has weak deformation capacity, and the pyrophyllite block is very easy to break under large pressure. At present, when soft and hard uniformity of the pyrophyllite block is evaluated, the performance of other pyrophyllite blocks produced in the same batch is usually evaluated by combining the use condition of part of the pyrophyllite block on-machine synthesis experiments. However, the evaluation by the method is often accompanied by the accident of pressure relief blasting, and the method also increases the loss of the top hammer of the press; in addition, the pressure relief blasting is caused by poor performance of individual blocks of the pyrophyllite blocks in the same batch, so that all the pyrophyllite blocks in the whole batch are abandoned, a large amount of waste is caused, and the cost of an enterprise is greatly increased.
And the performance of the pyrophyllite block is accurately and effectively evaluated, so that the method has great influence on improving the synthesis quality of the superhard material, ensuring the process stability of the superhard material, reducing the product resource loss and lowering the enterprise cost. Therefore, a nondestructive testing and analyzing method capable of effectively evaluating the soft and hard uniformity of the pyrophyllite block is urgently needed.
Disclosure of Invention
The invention aims to provide a method for detecting the hardness performance of a pyrophyllite block, which is used for solving the problems of low accuracy, large loss and high cost of the existing pyrophyllite block hardness evaluation method.
The method for detecting the hardness performance of the pyrophyllite block comprises the following steps:
1) the method comprises the following steps of (1) carrying out hardness detection on a plurality of pyrophyllite blocks of the same type, and determining a standard hardness interval of the pyrophyllite blocks according to hardness data, wherein the method specifically comprises the following steps;
1.1 preparing a pyrophyllite block to be detected, wherein the pyrophyllite block to be detected is a cuboid block with a cylindrical cavity in the middle, and the cylindrical cavity penetrates through two opposite side faces of the cuboid block;
1.2 determining a detection point at a key point position of a pyrophyllite block to be detected;
1.3, performing hardness test on the determined detection points, performing combined detection for a plurality of times by adopting different specifications and different maximum total experimental stresses aiming at the pyrophyllite blocks to be detected to obtain hardness data of different combinations, and ensuring that the pyrophyllite blocks after detection are not damaged and the subsequent synthesis and use of the pyrophyllite blocks are not influenced;
1.4, recording all hardness data of all detection points, analyzing abnormal values of the recorded hardness data, and removing the abnormal values;
1.5 after the abnormal value is removed, analyzing according to the hardness data to obtain a standard hardness interval of the pyrophyllite block;
2) and (3) carrying out hardness detection on the pyrophyllite block to be detected, and comparing the hardness data with the standard hardness interval determined by 1.5 to obtain the local and overall soft and hard uniformity of the pyrophyllite block to be detected.
According to the method for detecting the hardness performance of the pyrophyllite block, hardness detection is carried out by selecting key point positions on the surface of the pyrophyllite block, the local and overall hardness degree of the pyrophyllite block can be effectively reflected, other loss types of processing are not needed to be carried out on the pyrophyllite block, subsequent synthesis and use of the pyrophyllite block are not affected after detection, all produced pyrophyllite blocks are detected, detection results are refined to each block from the whole batch, the soft and hard uniformity of the pyrophyllite block can be accurately evaluated, the soft and hard uniformity serves as a performance evaluation index of the pyrophyllite block, pressure release and blasting risks are reduced, press top hammer loss is reduced, the detection accuracy and the utilization rate of the pyrophyllite block are greatly improved, and cost is reduced.
Further, in 1.2, detection points are respectively determined on two through side surfaces of the cylindrical cavity of the pyrophyllite block to be detected, and detection points are respectively determined on the other four side surfaces. Through all selecting the check point on each side of the pyrophyllite piece that awaits measuring, can be comparatively accurate evaluate the local and holistic soft or hard degree of pyrophyllite piece, improved comprehensive nature and the accuracy of the hardness performance evaluation to the pyrophyllite piece.
Further, when the detection points are determined in 1.2, four detection points are taken from two through side surfaces of the cylindrical cavity of the pyrophyllite block to be detected, the detection points are the central positions of shortest connecting lines from four edges to the excircle of the central hole, and diagonal cross points of corresponding surfaces are taken as the detection points from the other four side surfaces of the pyrophyllite block to be detected. The positions are selected as detection points, so that fewer detection points can be selected as far as possible to accurately reflect the hardness of each part and the whole of the pyrophyllite block to be detected, the detection efficiency is improved, and the detection accuracy is guaranteed.
Furthermore, four detection points on one side surface communicated with the cylindrical cavity of the pyrophyllite block to be detected are sequentially marked as a first detection point, a second detection point, a third detection point and a fourth detection point in the clockwise direction, four detection points on the other side surface communicated with the cylindrical cavity of the pyrophyllite block to be detected are also sequentially marked as a first detection point, a second detection point, a third detection point and a fourth detection point, and the first detection point, the second detection point, the third detection point and the fourth detection point on the two side surfaces respectively correspond to each other in the axial direction of the cylindrical cavity, so that hardness data of the detection points on the two side surfaces can be recorded conveniently. Therefore, the hardness data of each detection point can be conveniently marked, and data statistics and analysis processing are conveniently carried out.
Further, in 1.3, the specifications of the pressure heads are respectively 1.588mm, 3.175mm, 6.35mm and 12.7mm of the diameter of the steel ball, the total test stress is 590N and 980N respectively, the pressure heads with different specifications are combined with the two total test stresses respectively aiming at the pyrophyllite blocks to be tested with different ingredients, the optimal diameter of the steel ball and the optimal total test stress of the pyrophyllite blocks to be tested with different ingredients are determined, and then combination detection is carried out. Therefore, the optimal detection method can be found for different ingredients (artificial pyrophyllite blocks with different ingredients and natural pyrophyllite blocks with different ingredients) and pyrophyllite blocks with different block sizes, and the accuracy of combined detection data is guaranteed.
Further, it was determined that 6.35mm 588N total experimental stress and 12.7mm 588N total experimental stress were used for natural pyrophyllite blocks, and 6.35mm 980N total experimental stress and 12.7mm 980N total experimental stress were used for artificial pyrophyllite blocks. By the detection in the mode, the combined detection data can be obtained more accurately.
Further, in 1.4, abnormal values are determined and removed for all measured hardness data; when judging whether the data is an abnormal value, regarding each pyrophyllite block, taking hardness data of four detection points on four side surfaces parallel to the axis of the cylindrical cavity as hardness data of a group of point locations of the same type, and regarding the hardness data of the four detection points on the side surface through which the cylindrical cavity is communicated as hardness data of a group of point locations of the same type, namely, regarding each pyrophyllite block, three groups of hardness data of the point locations of the same type are provided; and when the difference between the hardness data of a certain detection point and the hardness mean value of the hardness data of the other three detection points of the same type of point positions of the detection point is larger than the standard deviation determined based on the hardness data of the other three point positions of the same type, judging that the hardness data is an abnormal value and removing the abnormal value. Noise data can be accurately removed, and then the overall stability index and the hardness standard interval of the pyrophyllite block can be accurately obtained according to the measured hardness data.
Furthermore, when the pyrophyllite block to be detected is prepared in 1.1, six faces of the pyrophyllite block to be detected are recorded in a distinguishing mode so as to conveniently correspond to hardness data of a detection point. Therefore, the hardness data of each detection point can be conveniently marked, and data statistics and analysis processing are conveniently carried out.
Furthermore, the side facing a pressing person when the pyrophyllite block is taken out of the press is a first side, the other sides are a second side, a third side and a fourth side in a clockwise mode in sequence, the other two sides of the pyrophyllite block are two sides with cylindrical cavities communicated, the side located on the upper side in the two sides is an A side, and the side located on the lower side in the two sides is a B side. Therefore, hard data of the same type of point positions can be conveniently distinguished and marked, and data recording errors are not easy to cause.
Further, the hardness data analysis in 1.5 is to judge the discreteness of the hardness data, establish box diagram analysis to obtain the characteristics of data distribution, obtain the fluctuation degree of the data through the height of the box body in the box diagram analysis, and analyze and compare the hardness data of the pyrophyllite blocks of the same type and different batches to obtain a standard hardness interval. Data analysis can be conveniently and quickly performed through the box diagram to obtain the data fluctuation degree, the discrete form of the hardness data can be conveniently judged, and then the stability standard and the standard interval of the hardness data can be accurately and quickly obtained.
Drawings
Fig. 1 is a schematic diagram of marking each side surface of a pyrophyllite block in a first embodiment of the method for detecting hardness property of a pyrophyllite block of the present invention;
fig. 2 is a schematic diagram of marking detection points on the first and fourth sides of a pyrophyllite block in the first embodiment of the method for detecting hardness performance of a pyrophyllite block of the present invention;
fig. 3 is a schematic diagram of marking a detection point on a side a of a pyrophyllite block in the first embodiment of the method for detecting hardness performance of a pyrophyllite block of the present invention;
fig. 4 is a schematic diagram of marking a detection point on the A, B side surface of a pyrophyllite block in the first embodiment of the method for detecting the hardness performance of the pyrophyllite block.
In the figure: 1. a first side surface; 2. a second side surface; 3. a third side; 4. a fourth side surface.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or apparatus that comprises the element.
The features and properties of the present invention are described in further detail below with reference to examples.
Example 1 of the method for detecting the hardness property of a pyrophyllite block of the present invention:
the following detection method is adopted in the embodiment:
in the detection method of the embodiment, overall, a rockwell hardness tester is used, key point positions on the specific surface of a pyrophyllite block are detected by matching total test stresses of different sizes with rockwell steel ball pressure heads of different diameters aiming at a plurality of pyrophyllite blocks of the same type and different specifications, stable and reliable measurement data are obtained on the premise that the pyrophyllite block is not damaged and the subsequent synthesis use is not influenced, the measured hardness data are effectively analyzed, abnormal values are removed, the stability of the data is determined, and a standard hardness interval of the pyrophyllite block of the corresponding specification is established; after the standard hardness interval is established, the hardness of the pyrophyllite block to be detected is detected, and the detected hardness data is compared with the standard hardness interval, so that the soft and hard uniformity of the pyrophyllite block can be effectively evaluated under the condition that the performance and the use of the pyrophyllite block are not influenced.
The method specifically comprises the following steps:
preparing a pyrophyllite block to be detected: preparing a pyrophyllite block with corresponding specification, wherein the pyrophyllite block to be detected is a cuboid hollow pressure transfer block with a cylindrical cavity in the middle, the cylindrical cavity penetrates through two opposite side faces of the cuboid block, and the pressure transfer block to be detected is qualified according to other standard requirements of products. Firstly, six surfaces of the air pressure transfer block are recorded in a distinguishing manner, as shown in fig. 1, the side, facing a pressing person, of the block body when the block body is taken out of the press is a first side surface 1, other side surfaces are a second side surface 2, a third side surface 3 and a fourth side surface 4 in sequence clockwise, meanwhile, the side surface, located at the upper side, of the block body is an A side surface, the side surface, located at the lower side, of the block body is a B side surface, the A side surface and the B side surface are two side surfaces with cylindrical cavities communicated, and the first side surface, the second side surface, the third side surface and the fourth side surface 4 are side surfaces parallel to the axis of the cylindrical cavities.
Determining detection points at key points of the pyrophyllite block to be detected: the method for determining the hardness uniformity of the test block body comprises the steps of firstly determining the point position which can reflect the hardness data of the side surface, the upper surface and the lower surface of the hollow pressure transmission block most, namely the optimal hardness detection position. For the first, second, third and fourth sides 4 of the hollow pressure-transmitting block, the diagonal intersection position is selected as the hardness detection point of these sides, and the detection point is determined by drawing a cross line on the corresponding side, and each point measures one point, as shown in fig. 2, P1 and P2 marked on the first side 1 and the fourth side 4 are the detection points of two sides.
For the side a and the side B of the hollow pressure transmission block, as shown in fig. 3-4, the side a and the side B respectively take the center positions of the shortest connecting lines from the four edges to the excircle of the center hole as detection points, wherein the four detection points of the side a are respectively clockwise sequentially recorded as a first detection point a1, a second detection point a2, a third detection point A3 and a fourth detection point a4, the four detection points of the side B are respectively clockwise sequentially recorded as a first detection point B1, a second detection point B2, a third detection point B3 and a fourth detection point B4, and the first, second, third and fourth detection points on the two sides respectively correspond to each other in the axial direction of the cylindrical cavity, so as to record hardness data of the detection points on the two sides.
Because the types of the existing pyrophyllite blocks are different, the natural pyrophyllite blocks and the artificial pyrophyllite blocks exist, the ingredients of the two pyrophyllite blocks are different, and aiming at the pyrophyllite blocks of different types, in the embodiment, a combination test is firstly carried out to determine the optimal detection mode aiming at the pyrophyllite blocks to be detected of different types, and after the optimal detection mode aiming at the pyrophyllite blocks of different types is determined, the optimal detection mode is adopted to carry out combination detection on the pyrophyllite blocks of corresponding types.
Firstly, different types of pyrophyllite blocks are provided with corresponding Rockwell steel ball pressure heads with different diameters and total test stresses with different sizes: the pressure heads are respectively 1.588mm, 3.175mm, 6.35mm and 12.7mm in diameter of the steel ball, the total test stress is 590N and 980N, the pressure heads with different specifications are respectively combined with two types of total test stress, so that the pyrophyllite blocks cannot be damaged after detection, the subsequent synthesis use of the pyrophyllite blocks is not influenced, and the optimal combination of the pressure head specifications and the total test stress is searched for different blocks. After the test, the optimal combination is determined to be 6.35mm combined 588N total experimental stress and 12.7mm combined 588N total experimental stress for the natural pyrophyllite block, and 6.35mm combined 980N total experimental stress and 12.7mm combined 980N total experimental stress for the artificial pyrophyllite block. And then, according to the determined optimal combination, the position of the pressure head corresponds to the position of the mark point of the pyrophyllite block, and the corresponding point position is measured.
And recording the hardness data of each detection point measured by the pyrophyllite block to be detected, and analyzing the abnormal values of all hardness data. Determining and removing abnormal values of all measured hardness data, judging whether the data are abnormal values or not, specifically, when judging whether the data are abnormal values or not, regarding each pyrophyllite block, regarding hardness data of four detection points on four side surfaces parallel to the axis of the cylindrical cavity as hardness data of a group of point locations of the same type, regarding hardness data of four detection points on a side surface through which the cylindrical cavity is communicated as hardness data of a group of point locations of the same type, namely, regarding each pyrophyllite block, hardness data of three groups of point locations of the same type are provided; and when the difference between the hardness data of a certain detection point and the hardness mean value of the hardness data of the other three detection points of the same type of point positions of the detection point is larger than the standard deviation determined based on the hardness data of the other three point positions of the same type, judging that the hardness data is an abnormal value and removing the abnormal value.
And after the abnormal value is eliminated, the discreteness of the block hardness data is judged, and box line graph analysis is established to obtain the characteristics of data distribution. The fluctuation degree of data is obtained through the height of the box body in the box diagram analysis, and the overall stability standard and the standard hardness interval of the block are obtained through analyzing and comparing pyrophyllite blocks of the same type and different batches.
After the standard is established, hardness detection is carried out on each pyrophyllite block, and hardness data of the pyrophyllite block is compared with a standard hardness interval, so that local and overall soft and hard uniformity of the pyrophyllite block can be obtained.
According to the method for detecting the hardness performance of the pyrophyllite block, disclosed by the invention, hardness detection is carried out by selecting key point positions on the surface of the pyrophyllite block, the local and overall hardness degrees of the pyrophyllite block can be effectively reflected, other loss types of processing are not required to be carried out on the pyrophyllite block, the subsequent synthesis and use of the pyrophyllite block are not influenced after detection, and the detection result is refined from the whole batch to each block by detecting all produced pyrophyllite blocks, so that the soft and hard uniformity of the pyrophyllite block can be accurately evaluated, the soft and hard uniformity is taken as a performance evaluation index of the pyrophyllite block, the pressure release and blasting risk is reduced, the press top hammer loss is reduced, the detection accuracy and the utilization rate of the pyrophyllite block are greatly improved, and the cost is reduced.
The invention also provides other variant embodiments, as follows:
in other embodiments, five points may be respectively selected as the detection points on the first, second, third, and fourth sides 4, one of the five points is located at the intersection of the diagonal of the side where the five points are located, and the other four points are located at the intersection of the circle with the intersection of the diagonal as the center of the circle and the diagonal. In this way, when the abnormal value is eliminated, the hardness data of five points on each of the first, second, third and fourth sides are respectively used as the hardness data of five groups of points of the same type.
In other embodiments, four specifications of a rockwell (rockwell) steel ball pressure head can be adopted to match three total test stresses, wherein the three test stresses are 588N, 980N and 1480N respectively, and hardness data of 12 different combinations are obtained for the same detection point so as to determine the optimal combination of the diameter of the steel ball and the total test stress.
The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention, the scope of the present invention is defined by the appended claims, and all structural changes that can be made by using the contents of the description and the drawings of the present invention are intended to be embraced therein.
Claims (10)
1. A method for detecting the hardness performance of a pyrophyllite block is characterized by comprising the following steps:
1) the method comprises the following steps of (1) carrying out hardness detection on a plurality of pyrophyllite blocks of the same type, and determining a standard hardness interval of the pyrophyllite blocks according to hardness data, wherein the method specifically comprises the following steps;
1.1 preparing a pyrophyllite block to be detected, wherein the pyrophyllite block to be detected is a cuboid block with a cylindrical cavity in the middle, and the cylindrical cavity penetrates through two opposite side faces of the cuboid block;
1.2 determining a detection point at a key point position of a pyrophyllite block to be detected;
1.3, performing hardness test on the determined detection points, performing multiple combined detection on the pyrophyllite block to be detected by adopting different specifications and different maximum total experimental stresses to obtain hardness data of different combinations, and ensuring that the pyrophyllite block is not damaged after detection and subsequent synthesis and use of the pyrophyllite block are not influenced;
1.4, recording all hardness data of all detection points, analyzing abnormal values of the recorded hardness data, and removing the abnormal values;
1.5, after eliminating the abnormal values, analyzing according to the hardness data to obtain a standard hardness interval of the pyrophyllite block;
2) and (3) carrying out hardness detection on the pyrophyllite block to be detected, and comparing the hardness data with the standard hardness interval determined by 1.5 to obtain the local and overall soft and hard uniformity of the pyrophyllite block to be detected.
2. The method for detecting the hardness performance of the pyrophyllite block according to claim 1, wherein in 1.2, detection points are respectively determined on two through side surfaces of the cylindrical cavity of the pyrophyllite block to be detected, and detection points are respectively determined on the other four side surfaces.
3. The method for detecting the hardness performance of the pyrophyllite block according to claim 2, wherein when the detection points are determined in 1.2, four detection points are taken from two side surfaces of the pyrophyllite block to be detected, wherein the four detection points are the central positions of the shortest connecting lines from four edges to the excircle of the central hole, and the diagonal intersection points of corresponding surfaces are taken as the detection points from the rest four side surfaces of the pyrophyllite block to be detected.
4. The method for detecting the hardness performance of the pyrophyllite block according to claim 3, wherein four detection points on one side surface through which the cylindrical cavity of the pyrophyllite block to be detected is communicated are sequentially marked as a first detection point, a second detection point, a third detection point and a fourth detection point clockwise, four detection points on the other side surface through which the cylindrical cavity of the pyrophyllite block to be detected is also sequentially marked as a first detection point, a second detection point, a third detection point and a fourth detection point, and the first detection point, the second detection point, the third detection point and the fourth detection point on the two side surfaces respectively correspond to each other in the axial direction of the cylindrical cavity, so that hardness data of the detection points on the two side surfaces can be recorded conveniently.
5. The method for detecting the hardness performance of the pyrophyllite block according to any one of claims 1-4, wherein in 1.3, the specifications of the pressure heads are respectively 1.588mm, 3.175mm, 6.35mm and 12.7mm of the diameter of the steel ball, the total test stress is respectively 590N and 980N, for the pyrophyllite blocks to be detected with different ingredients, the pressure heads with different specifications are respectively combined with the two total test stresses, the optimal combination of the diameter of the steel ball and the total test stress of the pyrophyllite blocks to be detected with different ingredients is determined, and then the combination detection is carried out.
6. The method for detecting the hardness performance of the pyrophyllite block according to claim 5, wherein 6.35mm 588N total experimental stress and 12.7mm 588N total experimental stress are used for the natural pyrophyllite block; 6.35mm with 980N total experimental stress and 12.7mm with 980N total experimental stress were used for the artificial pyrophyllite block.
7. The method for detecting the hardness property of the pyrophyllite block according to any one of claims 1-4, wherein in 1.4, abnormal values are determined and removed for all measured hardness data; when judging whether the data is an abnormal value, regarding each pyrophyllite block, taking hardness data of four detection points on four side surfaces parallel to the axis of the cylindrical cavity as hardness data of a group of point locations of the same type, and regarding the hardness data of the four detection points on the side surface through which the cylindrical cavity is communicated as hardness data of a group of point locations of the same type, namely, regarding each pyrophyllite block, three groups of hardness data of the point locations of the same type are provided; and when the difference between the hardness data of a certain detection point and the hardness mean value of the hardness data of the other three detection points of the same type of point positions of the detection point is larger than the standard deviation determined based on the hardness data of the other three point positions of the same type, judging that the hardness data is an abnormal value and removing the abnormal value.
8. The method for detecting the hardness performance of the pyrophyllite block according to claim 7, wherein when the pyrophyllite block to be detected is prepared in 1.1, six faces of the pyrophyllite block to be detected are recorded in a distinguishing manner so as to correspond to hardness data of a detection point.
9. The method for detecting the hardness performance of the pyrophyllite block according to claim 8, wherein the side facing a pressing person when the pyrophyllite block is taken out of the press is marked as a first side (1), other sides are sequentially a second side (2), a third side (3) and a fourth side (4) clockwise, the other two sides of the pyrophyllite block are two sides with a cylindrical cavity penetrating through, the side positioned on the upper side in the two sides is marked as an A side, and the side positioned on the lower side in the two sides is marked as a B side.
10. The method for detecting the hardness performance of the pyrophyllite block according to any one of claims 1-4, wherein the hardness data analysis in 1.5 is to judge the discreteness of the hardness data, establish box plot analysis to obtain the characteristics of data distribution, obtain the fluctuation degree of the data through the height of a box body in the box plot analysis, and analyze and compare the hardness data of the pyrophyllite blocks of the same type and different batches to obtain a standard hardness interval.
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