METHOD OF CHOOSING CUTTING HARD ALLOY FOR STEEL CUTTING WORK Russian patent published in 2009 - IPC B23B1/00 

FIELD: metallurgy industry.

SUBSTANCE: method involves characteristic comparison of the processed steel and cutting hard alloy with further selection of the ones which correspond to each other mostly. By means of temperature dependence curves of structure-sensitive characteristics of processed steel, critical temperature is defined, which corresponds to structural transformations in processed steel, then it is compared to temperature of maximum operability of cutting hard alloy and the cutting hard alloy the compared characteristics of which are similar or coincide is chosen. At that, as critical temperature, there accepted is temperature of extremum of processed steel ductility within 600 to 1150°C or temperature of extremum of specific heat capacity of processed steel within 600 to 1150°C, or temperature of extremum of thermal-conductivity coefficient of processed steel within 600 to 1150°C, temperature of extremum of linear expansion coefficient of processed steel within 600 to 1150°C, or final temperature converting ferrite into austenite at slow heating of A_C3 for hypoeutectoid steels or final temperature of dissolving cementite in austenite at low heating of A_cm for hypereutectoid steels.

EFFECT: achieving maximum operability of hard-alloy cutting plates.

2 dwg