Microstrucmre and properties of HVOF sprayed Ni-based submicron WS2/CaF2 self-lubricating composite coating

Microstrucmre and properties of HVOF sprayed Ni-based submicron WS2/CaF2 self-lubricating composite coating

Ni-based submicron WS2/CaF2 self-lubricating composite coatings were produced on carbon steel substrate by high velocity oxygen fuel（HVOF） spray processing, and the microstructure and mechanical properties of the coatings were investigated. Non-uniform microstructure characterized by some pores and...

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Veröffentlicht in:Transactions of Nonferrous Metals Society of China 2009, Vol.19 (1), p.85-92
1. Verfasser: 章小峰 张祥林 王爱华 黄早文
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数值模拟
超音速火焰喷涂过程
金属粉末
颗粒行为
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description Ni-based submicron WS2/CaF2 self-lubricating composite coatings were produced on carbon steel substrate by high velocity oxygen fuel（HVOF） spray processing, and the microstructure and mechanical properties of the coatings were investigated. Non-uniform microstructure characterized by some pores and microcracks is observed in the produced composite coatings, which leads to low microhardness value, low adhesive strength and low frictional coefficient. For Ni45-5%CaF2-10%WS2 （mass fraction） and Ni45-10%CaF2-5%WS2 （mass fraction） coatings, under the test condition of load 40 N and speed 2 m/s, the friction coefficients obtained at room temperature are in the range of 0.35-0.48 and 0.31-0.41, respectively. The friction coefficients of two kinds of coatings increase to 0.4-0.63 and 0.35-0.46, respectively, at the test speed of 1 m/s. And the Ni45-10%CaF2-5%WS2 coating presents the minimum friction coefficient of 0.32-0.38 and good anti-wear properties at 400 ℃.
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subjects 数值模拟
超音速火焰喷涂过程
金属粉末
颗粒行为
title Microstrucmre and properties of HVOF sprayed Ni-based submicron WS2/CaF2 self-lubricating composite coating
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