Method for rapidly measuring particle size of titanium nitride in high-speed wire steel

A high-speed wire rod, rapid measurement technology, used in particle size analysis, measuring device, particle and sedimentation analysis, etc., can solve the problem of undetectable and unsuitable titanium nitride particle size, and achieve smooth product logistics, improved identification ability, and improved preparation. easy effect

Active Publication Date: 2014-07-16
武汉钢铁有限公司
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Problems solved by technology

In this way, many titanium nitride particles with a diameter smaller than 1 μm cannot be detected.
Therefore, the analysis conditions recommended by the standard are not suitable for the analysis of titanium nitride particle size

Method used

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  • Method for rapidly measuring particle size of titanium nitride in high-speed wire steel
  • Method for rapidly measuring particle size of titanium nitride in high-speed wire steel
  • Method for rapidly measuring particle size of titanium nitride in high-speed wire steel

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Embodiment 1

[0035] The rapid determination method of the particle size of titanium nitride in the high-speed wire steel of the present invention comprises the following steps:

[0036] 1) The sample is analyzed by spark spectrometry, the time resolution window is opened at 60-350 μs, the sample is sparked 2000 times, and the light intensity measured by the titanium element channel is recorded for each discharge; figure 1 shown;

[0037] 2) Establish a calculation model:

[0038] In order to obtain an accurate average value of normal pulse light intensity, abnormal pulses need to be eliminated successively. Titanium normal pulse (i.e. solid solution titanium part) light intensity I Zi The calculation formulas of the average value Ip and the standard deviation S are as follows formulas 1 and 2:

[0039] I P = Σ I Zi n Formula 1; ...

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Abstract

The invention discloses a method for rapidly measuring the particle size of titanium nitride in high-speed wire steel. The method comprises the following steps of analyzing a sample on a spark spectrometer, opening a time-resolved window at 60 to 350 microseconds, performing spark discharge on the sample 1,000 to 2,000 times, and recording the measured light intensity of a titanium channel during the discharge each time; calculating an average value Ip and the standard deviation S of regular pulses I(Zi), calculating a threshold value Y of the pulse light intensity, converting the titanium irregular pulse intensity I(Yi) and the titanium regular pulse intensity I(Zi) into corresponding titanium content by using a standard curve respectively, calculating the content of titanium in the titanium nitride by using a difference value of the converted titanium content, calculating the content of the titanium nitride, and converting the content of the titanium nitride into the mass of the titanium nitride so as to finally obtain the particle size of the titanium nitride. According to the method, requirements on the preparation of the sample are un-harsh, the high measurement speed is ensured, the omission is avoided, a lower limit value of detection on the particle size of the titanium nitride can be lowered to be less than 1 micrometer, and a new solution is provided for the rapid measurement on the particle size of the titanium nitride.

Description

technical field [0001] The invention relates to a method for measuring the particle size of titanium nitride, in particular to a method for quickly measuring the particle size of titanium nitride in high-speed wire steel. Background technique [0002] Cord steel is a high-end product among high-speed wire rods, which has extremely strict quality requirements, and a series of item inspections must be carried out before the product leaves the factory. Among them, the particle size of titanium nitride is an indicator that has a great impact on quality, is the most difficult to detect, and takes the longest time. Titanium nitride is precipitated from the steel during rolling. [0003] At present, the mature detection method of titanium nitride particle size is the metallographic inspection method. The metallographic method has strict requirements on sample preparation, and the test surface needs to be polished to a mirror surface; the metallographic method takes 2 hours to ana...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/02
Inventor 沈克张兆雄陶勇马广平郭芳黄双李小杰关菊梅贾丽晖赵在群
Owner 武汉钢铁有限公司
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