Effect of phosphorus content on the mechanical and friction properties of oil-impregnated bronze bearings
Oil-impregnated bronze bearings with the different phosphorus contents(0～1%,mass fraction)were produced at the different sintering temperatures.To study the effect of P content on the friction and mechanical properties of the bearings,the friction coefficient and wear loss at the certain speed and load were measured,and the open-loop strength of bearings was examined.In addition,the optimized bearing content and sintering process parameters under the certain working conditions were obtained.The results show that,with the increase of P content,the wear loss of the bearings reduces,while the mechanical performances are improved.However,when the P content is excessed,the oil content reduces which is lower than the minimum standard.As the sintering temperature increases,the mechanical properties of the bearings are improved,but the friction coefficient is unstable.The open-loop strength and oil content of the oil-impregnated bronze bearing samples with 0.7%P content by mass after sintering at 650℃are 22 MPa and 13.52%,respectively,showing the good comprehensive performance as the stable friction factor and the best sintering state.
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