that the particles occupy on the surface and along a cross section of the ring flange is observed to be 5 40 preferably 10 30 the percentage of the area that the silicon carbide occupies in the abovedescribed embodiment is 19 5 along the cross section and 25 6 at the surface when the percentage of the area that the silicon carbide covers is less than 5 the anti wearing property of the ring deteriorates and when it exceeds 40 the sliding property of the ring traveller deteriorates to cause baking of the traveller after a short period of use and frequent yarn cuttings although the thickness of the composite plated layer 6 was taken as 30 u03bcm a thickness of 5 35 u03bcm is preferable when the thickness is less than 5 u03bcm the anti wearing properties when the spindle revolution speed is more than 20 000 r p m deteriorate and when it exceeds 35 u03bcm the treating time of the composite plating becomes extremely long which makes production cost of the ring high it is more desirable that the thickness of the composite plated layer be 16 35 u03bcm since the life of high speed spinning can thereby be prolonged the heat treatment conditions for the ring 1 formed with the composite plated layer 6 were such that the heat.