In order to ensure the safe development of the industry, trade, metallurgy, and coal industry in the new era, the friction spark particles of typical metal materials—Gr5 titanium alloy, Q235 steel, 304 stainless steel and aluminum, magnesium, zinc, and copper alloys are used as the research objects to explore the temperature of the friction area of metal materials. , Spark particles surface morphology, particle size characteristics, and ignition characteristics.
The test results show that the physical properties of metal materials have a significant impact on the occurrence of friction sparks: high melting point, high hardness, low thermal conductivity metal materials—Gr5 titanium alloy, Q235 steel, and 304 stainless steel are more likely to produce friction spark particles; their friction contact points The highest temperatures are 462, 750, and 801°C respectively. The pressure of the friction test piece and the rotation speed of the rotating disc directly affect the particle size of the friction spark and the amount of spark per unit time: as the pressure of the friction test piece increases and the rotation speed of the rotating disc increases, the particle size of the friction spark and the amount of spark per unit time appear A certain growth trend. The friction spark particles can ignite the hydrogen-air mixture and the alcohol liquid mist. The high temperature and high-pressure environment generated by the explosive combustion makes more friction spark particles aggravate the explosion and combustion, which increases the risk of friction spark particles.
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