Method for preparing WC (Wolfram Carbide) cemented carbide wearing layer on surface of petroleum drilling tool stabilizer through laser cladding

Abstract

The invention discloses a method for preparing a WC (Wolfram Carbide) cemented carbide wearing layer on a surface of a petroleum drilling tool stabilizer through laser cladding. A tough bottoming transition layer which is in good metallurgical bonding with a matrix is formed on the surface of a shell in a fusion covering manner through rapid laser scanning by using a high-power laser, and mixture alloy powder of spherical WC and Ni-Cr-B-Si, which is wearing-resisting and excellent in corrosion resistance, is prepared on the surface of the bottoming alloy through laser cladding. The power, position, shape and the like of a laser beam of the method can be accurately controlled, selective area or even micro-area fusion covering is easy to realize, the dilution rate of coating components is low, the coating thickness can be accurately controlled, non-contact type treatment is adopted, and automatic control is easy to realize in the whole process; in addition, a laser cladding process is non-pollution on the environment, free of radiation and low in noise, has the characteristics that the productivity is high, the energy consumption is low, the cladding layer machining margin is small, the finished product rate is high, the comprehensive cost is low, and the like, and can be widely applied.

Description

[0001] technical field

[0002] The invention belongs to the technical field of laser cladding, in particular to a method for preparing a WC hard alloy wear-resistant layer by laser cladding on the surface of an oil drilling tool stabilizer of a drilling device. Background technique

[0003] Drilling tool stabilizer is an important tool for petroleum drilling tools to prevent well inclination changes. In the case of using a relatively rigid drill collar and applying a large bit pressure, a reasonable stabilizer will make the well inclination change rate and azimuth change rate smaller, Improve wellbore quality and drilling speed, reduce drilling cost. Since the outer diameter of the stabilizer and the borehole clearance are very small, the edge of the rotating drilling tool is easy to wear, especially in hard formations, the outer diameter will soon be worn out. Therefore, the outer diameter of the stabilizer is coated with wear-resistant materials to ensure wear The layer...