US 11,987,889 B2
Boring bit component with hard face wear resistance material with subsequent heat treatment
Keith A. Johnson, West Bend, WI (US); Andrew J. Theisen, Fond du Lac, WI (US); Mark More, West Bend, WI (US); and Casey Placek, Van Dyne, WI (US)
Assigned to Kondex Corporation, Lomira, WI (US)
Filed by Keith A. Johnson, West Bend, WI (US); Andrew J. Theisen, Fond du Lac, WI (US); Mark More, West Bend, WI (US); and Casey Placek, Van Dyne, WI (US)
Filed on Mar. 28, 2020, as Appl. No. 16/833,555.
Claims priority of provisional application 62/833,283, filed on Apr. 12, 2019.
Prior Publication US 2020/0325584 A1, Oct. 15, 2020
Int. Cl. C23C 26/00 (2006.01); C21D 9/22 (2006.01); C22F 1/10 (2006.01); C22F 1/18 (2006.01); E21B 7/04 (2006.01); E21B 10/46 (2006.01)
CPC C23C 26/00 (2013.01) [C21D 9/22 (2013.01); C22F 1/10 (2013.01); C22F 1/18 (2013.01); E21B 7/046 (2013.01); E21B 10/46 (2013.01)] 27 Claims
OG exemplary drawing
 
1. A method for hardening a horizontal directional drilling (HDD) component, comprising:
hard facing the horizontal directional drilling (HDD) component at a region thereof, wherein the horizontal directional drilling (HDD) component comprises a boring bit, wherein the boring bit comprises a mounting base portion and an engagement bit portion extending axially forward from the mounting base portion, wherein a front thrust surface is along the engagement bit portion at an axially front-most location facing away from the mounting base portion, and wherein said hard facing covers at least 90% of the front thrust surface; and then subsequently
heat treating the hard faced horizontal directional drilling (HDD) component.