Effect of Controlled Rolling and Cooling Process Parameters on Precipitated Pearlite of 60Si2MnA Spring Steel Wire Rods

The effect of controlled rolling and cooling process parameters on the precipitated pearlite of 60Si2MnA spring steel wire rods is carefully investigated. Experimental results show that when other process parameters are alike, the interlamellar pearlite spacing of 60Si2MnA wire rods is mainly determined by cooling rate in the process from the rod layer to the coil collecting station. The more rapid the cooling rate in this process, the thinner the interlamellar pearlite spacing. The interlamellar pearlite spacing tends to reduce with the increase of finishing temperature or rod-laying temperature. The degenerative pearlite emerges especially after cooling at a rapid rate and its content increases with the elevation of cooling rate after finish rolling. The pearlite colony becomes small obviously at a low finishing temperature.