Steel ball hardness detector

Abstract

A steel ball hardness detector comprises a detection table and durometers, the detection table is in a concave shape, the bottom face of the middle of the detection table is a detection station used for containing a to-be-detected steel ball, the durometers are placed on platforms on the two sides of the detection table, and the detection ends of the durometers are located on the bottom face and right face the detection station. The hardness meter magnetic switch is in magnetic attraction with the detection table platform after being turned on, a handle of the hardness meter is rotated clockwise, a pressure head of the hardness meter is in contact with the surface of the steel ball under the hydraulic action, dents with different diameters and depths are formed along with different loading forces of a dial plate, and corresponding hardness values are obtained through optical measurement. The field steel ball hardness detection is effectively realized.

Description

Technical Field

[0001] The utility model relates to a steel ball hardness tester. Background Art

[0002] Ultra-supercritical thermal power units use more than 20 types of metal materials, and the quality of the manufacturing and processing technology directly affects the performance of the product. Since hardness is the ability of a metal surface to resist deformation or cracking within a local volume, it can indirectly reflect the value of tensile strength to a certain extent. Surface hardness and microhardness tests can reflect the microstructural state of the metal surface and its local area.

[0003] Because the Leeb hardness tester is an indirect test using numerical conversion, discrepancies in test results can lead to significant disputes between suppliers and suppliers. While Brinell hardness measurements are often used as the final basis for determining material hardness, Section 7.1.5 of the "Regulations for Metal Supervision in Thermal Power Plants" (DLT438-2016) stipulates that for the hardness test of steel pipes, a portable Leeb hardness tester can be used in accordance with GB / T 17394.1. If the hardness deviates from the specified value in this regulation, a portable Brinell hardness tester should be used for verification. However, according to the standard and product manual, Section 5.4.1.2 Test Conditions stipulates that only flat and curved specimens can be tested, and only pipes with a diameter of 50 mm and a wall thickness of 8 mm or more can be tested. Welds on austenitic stainless steel pipes, such as those made of 28.5 × 5.8 mm diameter water-cooled wall pipes and non-ferromagnetic materials such as final-stage superheaters and partition screens, as well as 80 mm diameter high-chromium grinding balls in non-wet ball mills, cannot be tested on-site and must be sent to a laboratory for testing using a fixed benchtop machine. This results in lengthy testing cycles and uncontrolled test results. Summary of the Invention

[0004] In order to overcome the deficiencies of the prior art, the utility model provides a steel ball hardness tester, which effectively realizes on-site steel ball hardness testing.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] A steel ball hardness tester includes a testing platform and a hardness tester. The testing platform is concave in shape. The middle bottom surface of the testing platform is used to place a testing station for the steel ball to be tested. The hardness tester is placed on the platforms on both sides of the testing platform. The detection end of the hardness tester is located on the bottom surface and directly opposite to the detection station.

[0007] Furthermore, the detection station is a countersink.

[0008] Furthermore, the hardness tester is a magnetic hardness tester, and the detection end of the hardness tester is an indenter located in the middle of the bottom surface. Of course, other hardness testers can also be used.

[0009] The beneficial effects of the utility model are mainly manifested in: effectively realizing on-site steel ball hardness detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of a steel ball hardness tester.

[0011] Figure 2 This is a schematic diagram of a magnetic hardness tester.

[0012] Figure 3 It is a working status diagram. DETAILED DESCRIPTION

[0013] The present invention will be further described below in conjunction with the accompanying drawings.

[0014] Reference Figures 1 to 3 A steel ball hardness tester includes a testing platform 1 and a hardness tester 2. The testing platform 1 is concave in shape. The middle bottom surface of the testing platform is used to place a testing station 3 for the steel ball to be tested. The hardness tester 2 is placed on the platforms on both sides of the testing platform 1. The detection end of the hardness tester 2 is located on the bottom surface and is opposite to the detection station 3.

[0015] Furthermore, the detection station 3 is a countersink.

[0016] Furthermore, the hardness tester 2 is a magnetic hardness tester, and the detection end of the hardness tester 2 is an indenter located in the middle of the bottom surface. Of course, other hardness testers can also be used.

[0017] The magnetic hardness tester comprises a hydraulic system inside a rotating hand wheel, a magnetic switch, a high hardness indenter and a loading force gauge, and is realized using existing technology.

[0018] This embodiment uses the domestically produced Shenyang Tianxing THBR portable Brinell hardness tester, which uses strong magnetic adsorption as a support point and utilizes a carbide ball or diamond cone indenter to form an indentation of a certain depth on the workpiece surface through a specified loading force. The indentation diameter is measured and calculated by the measurement system.

[0019] The embodiments of this specification are merely examples of implementations of the utility model and are provided for illustrative purposes only. The scope of protection of this utility model should not be considered limited to the specific forms described in these embodiments. The scope of protection of this utility model also extends to equivalent technical means that can be conceived by ordinary technicians in this field based on the concept of this utility model.

Claims

1. A steel ball hardness tester, characterized in that: The detector includes a testing platform and a hardness tester. The testing platform is concave in shape. The middle bottom surface of the testing platform is a testing station for placing the steel ball to be tested. The hardness tester is placed on the platforms on both sides of the testing platform. The detection end of the hardness tester is located on the bottom surface and is opposite to the detection station.

2. A steel ball hardness tester as claimed in claim 1, characterized in that: The detection station is a countersink.

3. A steel ball hardness tester according to claim 1 or 2, characterized in that: The hardness tester is a magnetic hardness tester, and the detection end of the hardness tester is an indenter located in the middle of the bottom surface.

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