METHOD FOR PRODUCING COMPONENT USING AGE HARDENING TYPE BAINITIC NON-HEAT TREATED STEEL

摘要

PROBLEM TO BE SOLVED: To provide a method for producing a component using age hardening type bainitic non-heat treated steel, having high strength and low toughness.SOLUTION: The present invention provides a method for producing a component using age hardening type bainitic non-heat treated steel which contains, in mass%, C: 0.10-0.40%, Si: 0.01-2.00%, Mn: 0.10-3.00%, P: 0.001-0.150%, S: 0.001-0.200%, Cu: 0.001-2.00%, Ni: 0.40% or less, and Cr: 0.10-3.00%, and further contains one or more of Mo: 0.02-2.00%, V: 0.02-2.00%, Ti: 0.001-0.250%, and Nb: 0.010-0.100%, with the balance being Fe and unavoidable impurities, and the content (mass%) of the chemical components satisfying a predetermined relational expression, and the method including an age hardening step and a strain age hardening step.SELECTED DRAWING: Figure 1