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.