| 摘要 |
FIELD: rolled stock production, namely rolling wire rod in small bar rolling mills. SUBSTANCE: method comprises steps of cooling mean portion of rolled piece; beginning cooling process in time moment when length of leading non-cooled end of rolled piece achieves value alphan.-c.= alphar.m./mut, where alphan.-c. - length of non-cooled end of rolled piece (m), alphar.m.- total elongation value after cooling process beginning; completing cooling process after achieving length of cooled portion of rolled piece equal to mut, where alphac= [1-2.(alphan.-c./lb.mut.l.)].lb.mut.l.- length of mean cooled portion of rolled piece(m), alphac - length of blank(m), lb - length of rolling mill(m), mut.l. - total elongation value before cooling process beginning. Cooling degree is determined according to expression DELTAT = K.DELTAB, where DELTAT- cooling degree (C), B- desirable additional widening of mean portion of rolled piece(mm), K- factor taking into account steel kind and determined according to next expression K= 84 x lnsigmay - 369, where sigmay - reference yield strength. EFFECT: possibility of making rods with geometry stable along their whole length, reduced number of rejected rods. 1 ex
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