Ten-gate holeless rod continuous rolling process

Abstract

The invention discloses a ten-gate holeless rod continuous rolling process, and belongs to a metal rolling process. The ten-gate holeless rod continuous rolling process is characterized in that hole rollers in previous ten gates of rod continuous rolling are replaced by flat rollers; hole rolling of rods in the previous ten gates is replaced by holeless rolling; holeless rolling in the previous ten gates is adopted to roll the rods; the rolling parameters are as follows: the rolling height-width ratio is 0.90-1.8; the reduction rate in each gate is 20%-60%; the rolling temperature is 950 DEG C-1100 DEG C; the height*width range of blanks is 150 mm*150 mm-165 mm*165 mm; the absolute broadsiding coefficient range is 0.18-0.45; holeless rolling of the rods in the previous ten gates is realized; the production cost is reduced; the product quality and the utilization rate of a rolling mill are improved; and the application range of the blanks is widened.

Description

technical field [0001] The invention belongs to the metal rolling process, in particular to a bar continuous rolling process. Background technique [0002] Bar production generally adopts the pass (also known as groove, the same below) rolling method, and the pass system consists of rough rolling passes (six passes), extended passes (six passes) and finishing passes (six passes); Rough and medium rolling passes are generally composed of box-shaped holes (holes are also called grooves, the same below)-elliptical holes. The extension and finishing rolling passes are generally elliptical holes-round hole systems. The main rolling holes using this pass system The advantage is that the deformation is relatively uniform, the commonality of the pass is good, the transition of the cross-sectional shape of the rolled piece in different passes is relatively smooth, it is not easy to generate local stress, and the cooling of the rolled piece is relatively uniform. This pass system has ...

AI Technical Summary

Problems solved by technology

[0009] The ten-pass non-perforated continuous bar rolling process proposed by the present invention solves the following two problems that may theoretically occur in the non-perforated rolling process: 1) The stability of the rolled piece is poor, and twisting and falling off occur. 2) The corner sharpening law of the rolled piece during the rolling process is not clear, and the surface quality of the product is affected

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