EFFECT OF COILING TEMPERATURE ON PROPERTIES OF GRANULAR REINFORCED NM300TP WEAR-RESISTANT STEEL
In order to fully utilize TiC particles to improve the wear resistance of steel,a medium carbon+low manganese+high silicon+high aluminum+high titanium composition system was adopted.By accurately controlling the proportion of microstructure,TiC particle size and volume fraction,the influence of coiling temperature on the properties of particle reinforced NM300TP wear-resistant steel was studied.The results show that when the coiling temperatures are 665℃,615℃,545℃,and 480℃,the experimental steel microstructures are PF+DP+GB,PF+GB+M/A,GB+M/A,and GB+M/A,respectively.As the coiling temperature decreases,the tensile strength of the test steel first increases and then decreases,while the elongation,hardness and impact performance show an increasing trend.When the coiling temperature is 480℃ and 545℃,all properties of the test steel meet the technical requirements,and products containing more M or M/A structures in the steel have better wear resistance.When the coiling temperature is low,the test steel contains a large amount of micron,submicron,and nanoscale TiC particles,which have strong resistance to deformation and wear,making the test steel exhibit the same wear resistance as martensitic wear-resistant steel at lower strength.
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