Diamond bonded construction with improved braze joint

摘要

Diamond bonded constructions comprise a body comprising a plurality of bonded together diamond grains with interstitial regions disposed between the grains that are substantially free of the catalyst material used to initially sinter the body. A metallic substrate is attached to the body, and a braze joint is interposed between the body and the substrate. The body is metallized to include a metallic material disposed along a substrate attachment surface in contact with the braze joint, wherein the metallic material is different from the braze joint material. The metallic material may exist within a region of the body extending fully or partially into the body, and/or may exist as a layer extending away from the substrate attachment surface. The body includes a working surface characterized by empty interstitial regions or by interstitial regions filled with an infiltrant material, wherein the infiltrant material is different from the metallizing material.

主权项

1. A diamond bonded construction comprising:
a body comprising a plurality of bonded together diamond grains with interstitial regions disposed between the diamond grains, wherein the interstitial regions are substantially free of a catalyst material used to initially form the body at high pressure/high temperature conditions, the body having a top surface and a bottom surface opposite the top surface; a carbide wetting material disposed along the body bottom surface and extending therefrom at least a partial depth into the body; a braze joint disposed between the carbide wetting material and a single metallic substrate, the braze joint being formed from a braze material, wherein the braze material is different from the wetting material and is capable of forming an attachment between the substrate and wetting material at elevated temperature conditions in the absence of elevated pressure during a process independent of one used to apply the wetting material to the body.