Tip for a pick tool, method of making same and pick tool comprising same

摘要

A tip for a pick tool, comprising a polycrystalline diamond (PCD) structure joined to a substrate body. The PCD structure has a strike surface including an apex opposite a boundary with the substrate body. At least an outer volume of the PCD structure contains filler material between diamond grains, the content of the filler material being more than 5 weight percent of the PCD material in the outer volume. The outer volume is proximate at least an area of the strike surface including the apex, and the thickness of the PCD structure between the apex and the boundary with the substrate body is at least 2.5 mm.

主权项

1. A tip for a pick tool, comprising a polycrystalline diamond (PCD) structure joined to a substrate body, the PCD structure having a strike surface including an apex opposite a boundary with the substrate body, the thickness of the PCD structure disposed between the apex and the boundary with the substrate body being at least 3 mm; in which the PCD structure consists of diamond and filler material, the filler material comprising catalyst material for diamond, the content of the filler material being more than 5 weight percent of the PCD structure and the content of the catalyst material being substantially uniform throughout the PCD structure; including in an outer volume of the PCD structure proximate at least an area of the strike surface including the apex, the outer volume containing filler material between diamond grains, the content of the filler material being more than 5 weight percent of the PCD structure in the outer volume.