Method for preparing WC hard alloy wear resistance area on petroleum drill rod surface

Abstract

The invention relates to a method for preparing a WC hard alloy wear resistance area on a petroleum drill rod surface. The method is characterized in that: the method comprises the following steps: (1) carrying out a pretreatment for the petroleum drill rod surface; (2) selecting alloy powder and adjusting an automatic powder feeding device; (3) cladding a bottoming alloy coating by a high power laser; (4) cladding spherical WC and Ni-Cr-B-Si mixed alloy powder by the high-power laser; (5) carrying out defectoscopy inspection after cladding. According to the present invention, the gradient coating method is adopted to prepare the WC hard alloy wear resistance area on the petroleum drill rod surface, the nickel-base alloy powder is adopted as the bottoming layer, the high wear resistance WC hard alloy powder is adopted as the working layer, such that the good binding strength of the working layer and the substrate is ensured in the case of meeting of the working layer characteristics, and the cracks can be prevented from expanding to the substrate during the using process, wherein the nickel-base alloy powder has good toughness and high strength, and has good metallurgy compatibility with the substrate.

Description

technical field

[0001] The invention relates to a method for preparing a wear-resistant coating on the surface of a drilling device component, in particular to a method for preparing a WC hard alloy wear-resistant belt on the surface of an oil drill pipe of a drilling device using laser cladding technology, which belongs to the laser cladding technology field. Background technique

[0002] The main function of the oil drill pipe joint wear-resistant band is to protect the casing and prevent the wear of the drilling tool. The surfacing is welded on the surface of the drilling tool for the purpose of double protection. It can be used on drilling tools in open hole and horizontal well engineering. It plays an important role in protecting casing, drill pipe, heavy drill pipe and drill collar from being worn out in oil drilling engineering. It can increase the service life of drilling tools by more than 3 to 5 times.

[0003] The oil drill pipe joint wear-resistant band requi...