Bonding method to prevent the formation of martensite in metal bonding applications

摘要

A bonding method: (a) a first component which is a length of rail train (12) comprising a first alloy having a temperature of austenitization known under which martensite is formed when the component is heated and then cooled to a predetermined cooling rate; and (b) a second component is a stud, a bolt or a block for fixing to a signal cable, wherein the second component comprises a second alloy; characterized in that said method comprises providing a machine friction welding inertia (10) and operate it to create a weld between the first (12) and the second component without passing the austenitizing temperature of the first alloy, where is operating the machine inertia friction welding (10) to provide a thrust load of 910 to 13000 Kg (2000 to 24,000 lbs.), a rotational inertia of 0,051- Kg.m2 0.80 (1.21 to 19 Wk2 ) and an initial speed of rotation of the spindle 300 to 13000 rpm.