A rolling method of steel for non-quenched and tempered connecting rod of an engine and a manufacturing method of a forging
A non-quenching and tempering, engine technology, applied in the manufacture of tools, metal rolling, metal rolling, etc., can solve the problems of many elements that are easy to segregate, affect the breaking performance of connecting rods, and uneven structure
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[0030] 46MnVS6 round steel (Φ38.0mm) for engine non-quenched and tempered connecting rod (wt.%: C0.44~0.47%, Si0.52~0.62%, Mn 1.20~1.28%, S 0.045~0.060%, V 0.14 ~0.16%, Nb 0.022~0.038%, Cr 0.18~0.26%, Ni 0.11~0.15%, N 0.012~0.021%) production as an example:
[0031] Steel rolling and forging process: Heating furnace heating - billet rolling - intermediate billet finishing - intermediate billet heating - second fire rolling - cooling - non-destructive testing - blanking - induction heating - forging - controlled cooling.
[0032] 1. Billet heating;
[0033]The continuous casting billet with a section of 280*320mm is heated in an air gas double regenerative heating furnace. The heating temperature is controlled as follows: the furnace temperature of the second heating stage is 1180-1230°C; the furnace temperature of the first heating stage is 950-1050°C; the soaking section is 1190 ~1220°C, control the heating temperature in the preheating section ≤ 850°C (preferably 780~840°C ...
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