METHOD FOR ROLLING OF SECTIONAL BARS

摘要

FIELD: technological processes. ^ SUBSTANCE: method includes heating of blank and multi-pass pressing in rollers with gauges on working parts of barrels with water cooling of gauges and reduction of blank temperature in passes. Reduction of rollers wear is provided by the fact that passes are carried out in temperature interval 850-1150°C with drawing coefficient of 1.015-1.45 per pass in rollers, working parts of which are made of alloy with the following chemical composition, wt %: 18-24 Co; 4.8-9.6 Ni; 0.8-3.2 Cr; the rest is WC. ^ EFFECT: higher quality of sectional bars and increase of rollers resistance. ^ 2 tbl, 6 ex