TY - JOUR
AU - Qiu, Bao
AB - 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/W2C 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/W2C 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/W2C 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.
TI - Improved Hardfacing for Drill Bits and Drilling Tools
JF - Journal of Thermal Spray Technology
DO - 10.1007/s11666-010-9569-x
DA - 2010-11-02
UR - https://www.deepdyve.com/lp/springer-journals/improved-hardfacing-for-drill-bits-and-drilling-tools-PO9gEApDWM
SP - 372
EP - 377
VL - 20
IS - 2
DP - DeepDyve
ER -