METHOD FOR PRODUCING SEAMLESS COLD-DEFORMED PIPES OF 426x8-25 mm SIZE MADE OF STEEL OF '08Х18Н10Т-Ш' GRADE

摘要

FIELD: metallurgy.;SUBSTANCE: method involves ingots casting with electroslag remelting, turning them into ingot billets, the central hole drilling in ingot billets, heating, feeding of ingot billets grease to the central hole, ingots piercing in the mill of cross-screw rolling on the mandrel into the cupped blanks, heating of the cupped blanks and piercing-rolling in the mill of cross-screw rolling on the mandrel into the cupped blanks, rolling the cupped blanks on TPU 8-16" with pilger mills into the tube stocks, correcting to curvature not more than 5.0 mm for the length of the pipe, thermal treatment in the form of austenitization, pipes cutting into two equal parts, mechanical processing-boring and turning into the tube stock workpieces, rolling of mechanically processed tube stocks on CRT 450 mill into trade pipes.;EFFECT: reduced expensive metal consumption, reduced roughness of outer and inner pipes surfaces, improved productivity and increased pipes lengths, reduced cost provided by regulation of workpieces processing modes at all stages of production.;1 tbl