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Method for making portable hardometer verification test block

A manufacturing method and a hardness tester technology, applied in the field of metallurgy, can solve the problems of many test points, damage, and inability to perform normal calibration on the calibration surface, and achieve the effect of saving costs and avoiding deviations

Inactive Publication Date: 2018-01-26
NANJING IRON & STEEL CO LTD
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Before using the portable hardness tester, it is required to use a standard test block for calibration to ensure the normality of the hardness tester to be used. However, due to frequent calibration, the purchased standard test block has too many test points on the calibration surface and causes damage. normal check

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0018] A manufacturing method of a test block for a portable hardness tester includes the following steps:

[0019] (1) Select die steel plate 718H with a thickness of 90mm. After the die steel heat treatment, take a sample from the head of the die steel plate. The sampling position is 1 / 2 or 1 / 4 of the width direction of the steel plate. The sampling size is: length * width = 110*110mm, get sample;

[0020] (2) After the sample is cooled, the sample is milled and prepared. The size of the prepared sample is: thickness*length*width=80*100*100mm, and the surface of the sample is smoothed with sandpaper and polishing paper. The edges and corners of the produced sample are smoothly transitioned to obtain a test block for the hardness tester;

[0021] (3) Use a desktop hardness tester to measure the hardness of the same section of the prepared hardness tester. It can be divided into Bush hardness (HBW) or Rockwell hardness (HRC). Note the hardness of the four corners and the center, the...

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Abstract

The invention discloses a method for making a portable hardometer verification test block. The method comprises the following steps: 1, selecting a die steel plate having a certain thickness, carryingout heat treatment on the die steel, and sampling the head of the die steel plate with the sampling position being 1 / 2 or 1 / 4 position of the steel plate in a width direction to obtain a sample; 2, cooling the sample, milling and processing the sample to obtain a required sample size, and smoothing the surface of the sample by using sand paper and polishing paper to obtain a hardometer verification test block; 3, measuring the hardness, which can be Brinell hardness or Rockwell hardness, of the same cross section of the produced hardometer verification test block by a desk hardometer, and recording the hardness values of four corners and the center; and 4, verifying an onsite portable hardometer by a standard test block, and determining the hardness values of the four corners and the center of the hardometer verification test block. The method ensures the accuracy of the portable hardometer to be used before use according to the characteristics of a hardometer test material, and the produced hardometer verification test block can save the cost.

Description

Technical field [0001] The invention relates to a method for manufacturing a test block in the field of metallurgy, in particular to a method for manufacturing a test block for a portable hardness tester. Background technique [0002] Before using the portable hardness tester, it is required to use standard test blocks for verification to ensure that the hardness tester to be used is normal. However, due to frequent verification, the purchased standard test block has too many test points on the verification surface and damages it. Perform normal verification. How to use on-site materials to make a test block for the hardness tester to reduce the cost of purchasing standard test blocks and make full use of the on-site corner materials is a technical problem to be solved by those skilled in the art. Summary of the invention [0003] The technical problem to be solved by the present invention is that, in view of the shortcomings of the above prior art, a method for making a test blo...

Claims

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Application Information

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IPC IPC(8): G01N3/02G01N3/62
Inventor 邓中涛
Owner NANJING IRON & STEEL CO LTD
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