Production method of 18CrNiMo7-6 forging for wind power equipment gear
A technology for wind power equipment and production methods, which is applied to the field of 18CrNiMo7-6 forgings for wind power equipment gears, and can solve problems such as workpiece cracking, narrow transition temperature range, and long transition time
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[0016] The technical solutions of the present invention will be further described below in conjunction with specific embodiments.
[0017] The production method of 18CrNiMo7-6 forgings for wind power equipment gears, the steps are as follows: blanking→forging→normalizing→tempering→rough turning→UT flaw detection→finish turning;
[0018] 1) Cutting: Take 18CrNiMo7-6 steel as raw material ingot, its chemical composition requirements are as follows: C: 0.15-0.21%, Si: 0.17-0.35%, Mn: 0.50-0.90%, P: ≤0.020%, S: ≤0.015%, Cr:1.50~1.80%, Ni:1.40~1.70%, Mo:0.25~0.35%, Cu:≤0.20%, Al:0.02~0.05%, Nb:≤0.05%, V:≤0.15%, Ti: ≤0.01%, N: 0.007~0.018%, Ca: ≤10ppm, Sn: ≤100ppm, Pb: ≤100ppm, Bi: ≤100ppm, Sb: ≤30ppm, As: ≤150ppm, H: ≤1.8ppm, O : ≤18ppm, Al / N: 3 / 5, As+Sn+Pb+Sb+Bi: ≤0.035%, the balance is Fe; the smelting method of electric furnace + ladle refining + vacuum refining is adopted when the ingot is unloaded, during the smelting process The protective pouring method is used to protect ...
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