Effects of C/B4C ratio on microstructure and property of Fe-based alloy coating reinforced with in situ synthesized TiB2-TiC |
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| Authors: | JiangShaoqun WangGang LvChangyue WangZehua ZhouZehua |
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| Affiliation: | College of Mechanics and Materials, Hohai university, Nanjing,210098 Changzhou Hohai Insitute of Science and Technology Limited Liability Company, Changzhou,213164 School of Materials Sciences and Engineering, Southeast University, Nanjing,211189,College of Mechanics and Materials, Hohai university, Nanjing,210098 Changzhou Hohai Insitute of Science and Technology Limited Liability Company, Changzhou,213164 School of Materials Sciences and Engineering, Southeast University, Nanjing,211189,College of Mechanics and Materials, Hohai university, Nanjing,210098 Changzhou Hohai Insitute of Science and Technology Limited Liability Company, Changzhou,213164 School of Materials Sciences and Engineering, Southeast University, Nanjing,211189,College of Mechanics and Materials, Hohai university, Nanjing,210098 Changzhou Hohai Insitute of Science and Technology Limited Liability Company, Changzhou,213164 School of Materials Sciences and Engineering, Southeast University, Nanjing,211189 and College of Mechanics and Materials, Hohai university, Nanjing,210098 Changzhou Hohai Insitute of Science and Technology Limited Liability Company, Changzhou,213164 School of Materials Sciences and Engineering, Southeast University, Nanjing,211189 |
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| Abstract: | The Fe-based alloy coatings reinforced with in situ synthesized TiB2-TiC were prepared on Q235 steel by reactive plasma cladding using Fe901 alloy, Ti, B4, and graphite(C) powders as raw materials. The effects of C/B4C weight percentage ratio(0-1.38) on the microstructure, microhardness, and wet sand abrasion resistance of the coatings were investigated. The results show that the coatings consist of (Fe, Cr) solid solution, TiC, TiB2, Ti8C5, and Fe3C phases. The decrease of C/B4C ratio is propitious to the formation of TiB2 and Ti8C5. Increasing the C/B4C ratio can help to refine the microstructure of the coatings. However, the microhardness of the middle-upper of the coatings and the wet sand abrasion resistance of coatings degenerate with the increase of C/B4C ratio. The coating exhibits and the wet sand abrasion resistance at C/B4C=0 and its average mass loss rate per unit wear distance is 0.001 2%/m. The change of the wet sand abrasion resistance of the coatings with C/B4C ratio can be mainly attributed to the combined action of the changes of microhardness and the volume percentage of the ceramic reinforcements containing titanium in the coatings. |
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| Keywords: | plasma cladding Fe-based alloy coating TiB2-TiC in situ synthesis abrasion |
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