Steel for wind power yaw bearing ring and heat treatment method
A heat treatment method and yaw bearing technology, applied in heat treatment furnaces, heat treatment equipment, furnace types, etc., can solve the problems of parts with low hardenability, and achieve the effect of improving hardenability
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Embodiment 1
[0014] The steel for wind power yaw bearing rings, according to the mass percentage, has a chemical composition of: C 0.44, Si 0.31, Mn 0.60, Mo 0.17, Ni 0.53, Cr 1.12, B 0.0020, A1 酸溶 0.028, V 0.09, N≤0.002, O≤0.0005, H≤0.00010, S≤0.003, P≤0.008, the rest is Fe and a small amount of impurities.
[0015] According to the design composition, the material is fed, smelted, cast into ingots, processed into forged billets by forging, and processed into wind power yaw bearing rings, heated to 850 ° C for 4 hours for austenitization, oil quenching, and then Heat to 640°C for 3 hours, then cool the material oil to room temperature; then carry out surface induction heating and quenching, the heating rate is 90°C / s, the heating temperature is 945°C, hold for 3s, and then cool at 60-70°C / s Speed quench to room temperature.
[0016] Sampling at the wall thickness of 12.5mm for mechanical performance test: the yield strength is 1155MPa, the tensile strength is 1278MPa, the elongation is...
Embodiment 2
[0018] The steel for wind power yaw bearing rings, according to the mass percentage, has a chemical composition of: C 0.44, Si 0.33, Mn 0.65, Mo 0.16, Ni 0.52, Cr 1.15, B 0.0020, A1 酸溶 0.028, V 0.09~0.10, N≤0.002, O≤0.0005, H≤0.00010, S≤0.003, P≤0.008, the rest is Fe and a small amount of impurities.
[0019] According to the design composition, the material is fed, smelted, cast into ingots, processed into forged billets by forging, and processed into wind power yaw bearing rings, heated to 850 ° C for 4 hours for austenitization, oil quenching, and then Heat to 640°C for 3 hours, then cool the material oil to room temperature; then carry out surface induction heating and quenching, the heating rate is 90°C / s, the heating temperature is 945°C, hold for 3s, and then cool at 60-70°C / s Speed quench to room temperature.
[0020] Sampling at the wall thickness of 12.5mm for mechanical performance test: the yield strength is 1158MPa, the tensile strength is 1283MPa, the elongati...
Embodiment 3
[0022] The steel for wind power yaw bearing rings, according to the mass percentage, has a chemical composition of: C 0.44, Si 0.32, Mn 0.63, Mo0.17, Ni 0.55, Cr 1.15, B 0.0020, A1 酸溶 0.029, V 0.09~0.10, N≤0.002, O≤0.0005, H≤0.00010, S≤0.003, P≤0.008, the rest is Fe and a small amount of impurities.
[0023] According to the design composition, the material is fed, smelted, cast into ingots, processed into forged billets by forging, and processed into wind power yaw bearing rings, heated to 850 ° C for 4 hours for austenitization, oil quenching, and then Heat to 640°C for 3 hours, then cool the material oil to room temperature; then carry out surface induction heating and quenching, the heating rate is 90°C / s, the heating temperature is 945°C, hold for 3s, and then cool at 60-70°C / s Speed quench to room temperature.
[0024] Sampling at the wall thickness of 12.5mm for mechanical performance test: the yield strength is 1162MPa, the tensile strength is 1285MPa, the elongatio...
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