Hardness test method

A detection method and hardness technology, applied in the direction of testing material hardness, etc., can solve the problems of serious temperature drift, small linear working range, unsatisfactory, etc., and achieve the effect of expanding the detection range and improving the detection accuracy
CN101893534AInactive Publication Date: 2010-11-24BAOSHAN IRON & STEEL CO LTD
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
BAOSHAN IRON & STEEL CO LTD
Publication Date
2010-11-24
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention discloses a hardness test method. The hardness test method comprises the following steps of: firstly, demarcating and drawing a hardometer working curve (namely an indentation depth-hardness value curve) by using test blocks with different hardness and using a VB software program; secondly, testing a workpiece to be tested; and substituting a tested indentation depth value into the hardometer working curve to obtain the hardness value of the workpiece to be tested. The technical scheme has the advantages of greatly improving the test precision and the stability, enlarging the test range and effectively monitoring the whole working process of equipment in a dynamic state to ensure that a hardometer can meet actual needs of automated large-scale production.
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Description

technical field

[0001] The invention relates to the relevant technical field of hardness detection, especially for the hardness tester with high precision and large detection range. The electrical signal of the indentation depth is converted into a digital signal by analog-to-digital conversion, and then the digital signal is subjected to nonlinear conversion processing to obtain the indentation depth value, and the hardness value of the standard test block is obtained through calculation. Background technique

[0002] The hardness tester used in the steel production line is an instrument for online measurement of the hardness value of the product on the drill pipe production line. Since the hardness value reflects an important physical parameter of the pipe after a series of previous processes such as heat treatment, it directly affects the resistance to hydrogen sulfide. The quality of high-grade steel products such as corrosion pipes, anti-oxidation pipes, and high-resist...

Claims

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