High-strength bolt heat treatment process

Abstract

The invention relates to the heat treatment process technology field, and discloses a high-strength bolt heat treatment process. The process comprises the following steps of S1, firstly, taking materials, and carrying out ultrasonic flaw detection on selected semi-finished bolts; S2, carrying out deburring treatment on the qualified semi-finished bolts, putting the semi-finished bolts into a stirring machine, pouring a certain amount of gravel into the stirring machine, starting the stirring machine to carry out stirring for 35-45 min, and finally, guiding out the semi-finished bolts and separating the gravel; S3, then successively carrying out normalizing treatment, annealing treatment, quenching treatment and tempering treatment on the semi-finished bolts; and S4, cleaning the bolts after heat treatment and cooling, and meanwhile putting the bolts into a drying machine to be dried for 33-42 min. By using the high-strength bolt heat treatment process, the bolts can obtain an ideal structure and performance through multiple times of heat treatment, the structure can be uniform through hardening, production quality of the bolts is improved, and meanwhile use reliability of the boltsis increased.

Description

technical field [0001] The invention relates to the technical field of heat treatment technology, in particular to a high-strength bolt heat treatment technology. Background technique [0002] With the increasingly prominent environmental protection issues and the increasingly tense energy supply, wind power generation, as a clean and renewable energy generation method, has received more and more attention, which has led to the rapid development of the wind power industry. Wind power is not limited to the development of land platforms, but is moving towards ocean platforms. With the development of the wind power industry, the production of high-strength bolts for wind power generation equipment is also facing unprecedented challenges. With the expansion of wind power installed capacity, the requirements for the performance indicators of high-strength bolts are also getting higher and higher, not only requiring high strength, but also At the same time, the requirements for p...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a heat treatment process for high-strength bolts, which has the advantages of improving the production quality of bolts and improving the reliability of bolts at the same time. The cooling method can obtain good mechanical properties, but for bolts with large specifications, the conventional cooling method often cannot make the material obtain the ideal structure and properties, and there are often situations such as lack of hardening and uneven structure, which will affect the bolts. Production quality, while affecting the reliability of bolts