A method for measuring the hardness distribution of fasteners
A technology of hardness distribution and fasteners, applied in the direction of testing material hardness, etc., can solve the problems of long measurement time, unsightly hardness distribution curve, inaccurate measurement data, etc., achieve short measurement time, high accuracy, and improve work efficiency Effect
Active Publication Date: 2021-05-28
AEROSPACE PRECISION PROD INC LTD
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Problems solved by technology
[0004] In view of this, the present invention aims to propose a method for measuring the hardness distribution of fasteners to solve the problems of long measurement time, inaccurate measurement data, and unsightly hardness distribution curves of the existing measurement methods
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[0036] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.
[0037] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner" and "outer" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and Simplified descriptions, rather than indicating or implying that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and thus should not be construed as limiting the invention. In addition, the terms "first", "second", etc. are used for descriptive purposes only, and should not be understood ...
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The invention provides a method for measuring the hardness distribution of fasteners, comprising the following steps: using a scribe method to scribe on a sample with a blade; measuring three hardness points equidistantly at the starting end of the scribe, as a standard hardness , respectively corresponding to the depth of the corresponding part of the scratch, the data obtained by using the scribing method is the scratch depth h, the known data includes the blade tip angle η, the constant pressure F, and the functional relationship between the micro-Vickers hardness and the indentation depth : Through the control of the controller program, the above relationship is corresponding to the depth curve of the scratch, and the hardness distribution curve of the area to be tested can be obtained. The method for measuring the hardness distribution of fasteners described in the present invention directly measures and calculates the hardness distribution of the measured area by drawing a line on the area to be measured and through the functional relationship of hardness-scratch depth, and the accuracy of the measurement data is high.
Description
technical field [0001] The invention belongs to the field of hardness measurement, in particular to a method for measuring the hardness distribution of fasteners. Background technique [0002] Hardness is an indicator of the softness and hardness of a material, and at the same time has a certain relationship with the mechanical properties of the material (such as: tension, shear, etc.). Because its measurement method is simpler and faster than the measurement method of tension, shear, etc., hardness is often used in the production process of fasteners to judge whether the product meets the expected mechanical performance requirements. The hardness test is generally a single-point measurement, and the hardness value is calculated according to the size of the indentation. At present, some new products in fasteners have put forward new requirements for the performance of the product, and it is not possible to simply test its tensile force, shear, and single-point (or within-ar...
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IPC IPC(8): G01N3/42
CPCG01N3/42
Inventor 齐跃康彪孙虹烨高伟张文静袁娅张槐刘小鹏梁铠璐
Owner AEROSPACE PRECISION PROD INC LTD