Device and technique for processing rope drill rod in medium-frequency induction way

Abstract

The invention provides a device and a technique for processing a rope drill rod in a medium-frequency induction way, and solves the problems of low production efficiency, poor evenness of integral heat treatment of the drill rod, and low energy utilization rate in the traditional heat treatment techniques for producing long steel pipes. The device mainly comprises a quenching induction coil, a quenching spraying cooling water loop, a tempering induction coil, a tempering spraying water loop and a variable-frequency adjustable-speed roller way. The technique is realized in a way that: using a production mode of section-by-section advance continuous induction heating; and quickly heating to the austenite temperature before quenching the drill rod, thereby forming an ultrafine martensitic structure during quenching and forming a fine-grain ferrite-pearlite structure during normalizing. Since the induction heating has the advantage of short tempering time, the precipitated small-grain carbides can be evenly distributed on the fine-grain martensitic substrate. The invention carries out the section-by-section advance continuous heating by utilizing the electromagnetic induction of the medium-frequency current, and can simultaneously carry out the quenching and the tempering. The invention ensures the heat treatment evenness of the drill rod body and achieves the goal of enhancing the comprehensive mechanical properties of the drill rod.

Description

technical field [0001] The invention relates to a device and a process method for processing wireline drill pipe used for drilling. Background technique [0002] The wireline coring drill pipe that is widely used in geological exploration is a thin-walled alloy steel pipe. During use, it must bear the tensile stress generated by the rod's own weight on the one hand, and on the other hand it must withstand the high-speed rotation of the power head. Therefore, the mechanical performance requirements of the drill pipe are relatively high. As the exploration depth increases, the requirements for the mechanical performance of the drill pipe body gradually increase. Ordinary hot-rolled or cold-drawn steel pipes can no longer meet the requirements for use. Therefore, the overall mechanical performance of the drill pipe must be improved through overall quenching and tempering treatment. , to extend the service life of the drill pipe. [0003] Therefore, our factory has introduced ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a kind of medium frequency induction processing equipment and technology for wireline drill pipes, so as to solve the problem of low production efficiency, poor uniformity of overall heat treatment

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