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Abstract
In the process of copper alloy hot continuous rolling, the problem of copper sticking to the roller seriously affects the surface quality, performance, and service life of the copper products. Roll sticking occurs as the adhesion energy of Cu is lower than that of Fe and the Fe-Cu interface, and the severe surface deformation which forces the copper into direct contact with the roll during the process of profile rolling. Based on the copper deformation law and adhesion phenomenon in the hot continuous rolling process, a rolling deformation model and roll copper adhesion model or copper alloy hot continuous rolling were established, and their simulation was realized using finite element software. Through finite element modeling of the hot rolling deformation zone, the distribution of the temperature, contact normal stress, and exposure rate in the hot rolling deformation zone were obtained, which were consistent with the actual roll adhesion phenomenon and copper adhesion position. To address the copper sticking behavior of the rolls, the process optimization method of matching the motor speed with the elongation coefficient (the 1# and 2# motor speeds were adjusted to 1549 r/min and 1586 r/min, respectively), adjusting the roll gap to 7.9 mm, and increasing the number and pressure of roll spray nozzles were put forward, which effectively solved the problem of copper sticking to the roll, significantly improved the surface quality of the copper and the service life of the roll, and can be used in production.
Highlights
Copper and its alloys are important non-ferrous metals
With the rapid development of the Chinese economy and industrial technology, the development of advanced material connection technology is the key to expanding the potential applications of engineering alloys, with copper alloy in particular exhibiting significant potential
The present study aiming to address the problem of copper sticking to the roll during the hot rolling process, by investigating the key technologies intended to improve the production line process of high quality and large output continuous casting and rolling of copper rod
Summary
Copper and its alloys are important non-ferrous metals. Due to their excellent overall performance (higher corrosion resistance, excellent electrical and thermal conductivity, easy manufacturing, resistance to biological pollution, and other attractive features), they are widely used in many environments and industries [1]. The present study aiming to address the problem of copper sticking to the roll during the hot rolling process, by investigating the key technologies intended to improve the production line process of high quality and large output continuous casting and rolling of copper rod. C Jin-Won et al [14] have carried out a detailed study on steel-bonding behavior under hot rolling conditions, which revealed that the high-temperature tensile strength and oxidation resistance are important factors affecting bonding between the bare metal and the roll surface. The sticking behavior and mechanism underlying the hot continuous rolling of copper wire, which have important practical significance in solving the problem of copper sticking to the hot rolls, require further research to promote the production and manufacture of high-quality copper wire. By optimizing the existing process, positive results were achieved which may result in economic benefits in this enterprise
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