2000-282176 is referenced by 3 patents.
PROBLEM TO BE SOLVED: To produce a steel wire for spring excellent in heat resistance in the temp. region of 130 to 250°C and to provide a method for producing it. SOLUTION: This steel wire for a heat resistant spring contains, by weight, 0.7 to 0.9% C, 0.7 to 1.2% Si and 0.3 to 0.9% Mn and furthermore, contains plural elements selected from the group composed of 0.05 to 0.5% Cr, 0.005 to 0.05% Cu and 0.01 to 0.1% Mo. Its tensile strength is 1,400 to 1,900 MPa, twisting strength is 600 to 1000 MPa before aging and 800 to 1100 MPa after aging, and elongation is ≥3%. The minimum width of the thickness of a ferritic layer in a pearlite lamellar is ≥20 nm.