Laser cladding preparation method of NiCrBSiCe corrosion-resistant sucker rod

Abstract

The invention discloses a laser cladding preparation method of a NiCrBSiCe corrosion-resistant sucker rod. The method comprises the steps that 1, the surface of the sucker rod is treated, and scale, grease and dirt are removed; 2, the sucker rod subjected to surface treatment is subjected to sand blasting and roughening, and the roughness is larger than Ra 25; 3, NiCrBSi powder and Ce2O3 powder are mixed according to the weight ratio of (4-10):1, sodium silicate is added, the mixture is ground and ground uniformly, water is added, and slurry is formed; 4, the roughened sucker rod is coated with the slurry, and the slurry is dried at the temperature of 150 DEG C-200 DEG C; 5, a self-protecting material is coated and dried at the temperature of 150 DEG C-200 DEG C; and 6, laser cladding is adopted, the laser power ranges from 2 kW to 10 kW, the facula width ranges from 3 mm to 10 mm, the scanning speed ranges from 2 mm / s to 5 mm / s, a NiCrBSiCe abrasion-resistant coating cladding the surface of the sucker rod is obtained, the thickness of the coating ranges from 700 um to 800 um, and the corrosion-resistant sucker rod is obtained. According to the method, microhardness of the obtained coating is 750-950 HV0.2 and is far higher than that of a base body, and the corrosion-resistant performance of the sucker rod is improved.

Description

technical field [0001] The invention relates to the field of material technology, in particular to a laser cladding preparation method of an abrasion-resistant sucker rod. Background technique [0002] After years of development in the oil field, it has now reached the middle and late stages. With the increase of water content in oil wells, the proportion of oil well maintenance workload caused by abrasion has increased significantly, and there is a gradual upward trend. Abrasion is a general term for the interaction between wear and corrosion. The problem of eccentric wear of sucker rods is essentially a problem of abrasion. The early scrapping of the sucker rod due to the abrasion of the oil well causes a sharp increase in the input of manpower and material resources, resulting in serious waste. [0003] At present, the development of oil fields has entered a period of high water cut. The water content of some oil fields is as high as 94.5%. The well fluid contains corros...

AI Technical Summary

Problems solved by technology

The combination of corrosion and wear is more harmful than simple corrosion or wear, because wear will remove the corrosion layer on the surface of the equipment that acts as a corrosion inhibitor, thereby accelerating the wear of the corrosion surface, causing equipment failure or even shutdown, and reducing oil well production

In recent years, due to the increase of water content in the well fluid, in order to stabilize the crude oil production, it is necessary to increase the number of pump strokes, which further aggravates the wear of the sucker rod