NDLI: Improved Hardfacing for Drill Bits and Drilling Tools

Content Provider	Springer Nature Link
Author	Sue, Albert Sreshta, Harry Qiu, Bao He
Copyright Year	2010
Abstract	New flame spray hardfacing, DSH (DuraShell$^{®}$ Steel Hardfacing, US patent pending), was developed to improve thermal conductivity, abrasion wear, and erosion resistance for subterranean drilling application. The materials consisted of spherical cast WC/W$_{2}$C and Ni-Si-B alloy powders. The hardfacing compositions were tailored for various processes such as flame spray and laser cladding. Typically, the hardfacing comprised hard tungsten carbide particles being uniformly distributed in a tough Ni-alloy matrix. The hardness of WC/W$_{2}$C exceeded 2300 Hv$_{.3}$ and that of Ni-alloy matrix varied from about 400 to 700 Hv$_{.3.}$ High- and low-stress abrasion resistances of these hardfacing materials were characterized and compared to the conventional hard coatings of cast WC/W$_{2}$C and Ni-Cr-Si-B-Fe. The increase in thermal, wear, and erosion resistances of the hardfacing improved the durability of PDC (polycrystalline diamond compact) steel body bit and drilling tools and their cost-effective performance. Several case studies of DSH hardfacings on drill bits were described.
Starting Page	372
Ending Page	377
Page Count	6
File Format	PDF
ISSN	10599630
Journal	Journal of Thermal Spray Technology
Volume Number	20
Issue Number	1-2
e-ISSN	15441016
Language	English
Publisher	Springer US
Publisher Date	2010-11-02
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	flame spray fluidity laser cladding PDC steel bit WC/W$_{2}$C Analytical Chemistry Operating Procedures, Materials Treatment Characterization and Evaluation of Materials Materials Science Tribology, Corrosion and Coatings Surfaces and Interfaces, Thin Films
Content Type	Text
Resource Type	Article
Subject	Surfaces, Coatings and Films Materials Chemistry Condensed Matter Physics

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