Laser surface cladding treatment technology for tooth surface of roller bit

Abstract

The invention discloses a laser surface cladding treatment technology for the tooth surface of a roller bit, which comprises the following steps: (1) performing pretreatment on the tooth surface of the roller bit; (2) inspecting the tooth surface of the roller bit by a dye penetrant inspection process; (3) adopting the nickel base alloy powder as a base coat of the tooth surface of the roller bit; (4) cladding a base alloy by high-power CO2 laser complete equipment; (5) adopting spherical WC and Ni-Cr-B-Si self-fusion alloy mixed alloy powder as a working layer of the tooth surface of the roller bit; (6) cladding the spherical WC and Ni-Cr-B-Si mixed powder by a high-power laser in two processing modes of narrow-band cladding processing and wide-band cladding processing; and (7) after the cladding, performing flaw detection inspection to ensure that the surface of the processed part is flat. The technology provided by the invention strengthens the tooth surface of the roller bit, prolongs the service life of the roller bit, basically solves the problems of early bald-grinding, peeling and the like of the roller bit, improves the operation efficiency of a drilling machine and reduces the production cost.

Description

technical field [0001] The invention relates to the field of surface strengthening technology of a roller cone bit, in particular to a laser surface cladding treatment process for the tooth surface of a roller cone bit. Background technique [0002] With the continuous growth of people's demand for energy utilization, the exploration and development of oil and gas resources in my country are also developing continuously, which makes people put forward higher requirements for the drilling performance of drilling equipment. The roller cone drill is the main rock-breaking tool for drilling. It produces crushing and sliding shearing between the hard rock under high drilling pressure and is accompanied by huge impact and strong erosion of cuttings mud. Materials present serious challenges. Because the service environment of the roller cone bit is the huge impact of the gravel and the strong erosion of the rocky mud, the material for the manufacture of the roller cone bit must ha...

AI Technical Summary

Problems solved by technology

Diamond has very high hardness and good comprehensive wear resistance, so it has played an irreplaceable role in high-hard rock drill teeth. However, the preparation process of diamond buttons is complex, high cost, low strength, and low impact toughness. These unfavorable factors limit the its application

Cemented carbide has high strength and hardness, good red hardness, good wear resistance, small thermal expansion coefficient, good chemical stability, and compared with diamond, the cost of cemented carbide is much lower, and it is currently used in a large amount of drilling teeth. However, compared with diamond materials, the hardness of cemented carbide materials is much lower, and the comprehensive performance is far inferior to that of diamonds. Moreover, cemented carbides contain strategic metals such as W, Co, and Ta. Extensive use of cemented carbides to manufacture roller cone drills will increase resources. , The tense situation of the environment limits the further development of cemented carbide