METHOD OF MANUFACTURE OF DIE Russian patent published in 2006 - IPC B23K31/02 B23K35/32 B23K9/04 C21D9/50 

FIELD: mechanical engineering and metalworking; methods of manufacture of cold strain dies.

SUBSTANCE: proposed method includes welding-on the welding material on working section of die of the following chemical composition: C, 0.5-1.5%; Si, 0.2-2.0%; Mn, 0.3-6.0%; Cr, 0.3-10%; Co, 0.3-10%; V, 0.3-2.0%; Mo, 5.0-10.0%, unavoidable admixtures; the remainder being Fe. Welded-on metal is cooled down at rate above critical rate of hardening in temperature interval of Ar₁-600°C. Welded-on working part is subjected to machining for obtaining required geometry and to treatment by cold of welded-on metal. After machining and treatment by cold, welded-on metal is tempered at temperature of 480-520°C ensuring separation of dispersed carbides and intermetallic compounds without coagulation.

EFFECT: enhanced hardness of working part of die; enhanced reliability; increased productivity.

2 cl, 4 dwg, 3 tbl