An improved friction-welding process for effecting a joint between steel and nodular graphite-containing cast iron by using (i) a short friction-generating time so as to minimize diffusion of carbon into steel and (ii) an elevated forging pressure so as to effect a quantitative ejection of carburized melt but avoid formation of a weld laminate, is provided, as well as a nodular graphite-containing cast iron of grade 40.3 S, suitable for use in friction-welding and comprising about 280-320 graphite nodules per mm2, 280-300 ferrite grains per mm2 and a spherulite proportion of about at least 95% by weight of the graphite precipitations.
申请公布号
RU1771440(C)
申请公布日期
1992.10.23
申请号
SU19874203814
申请日期
1987.12.07
申请人
VALTER KHUNDKHAUZEN GMBKH UND KO, K×;KUKA SCHWEISSANLAGEN & ROBOTE
发明人
VOLFGANG FARRENKOPF,DE;KHAJNRIKH GRYUNAUER,DE;MANFRED MENTSINGER,DE;JOAKHIM FON KHIRSH,DE;RAJNKHARD OPITTS,DE