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

Inactive Publication Date: 2020-12-08
ZHANGJIAGANG HONGYANG METAL PRODS MFG
View PDF10 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the key components of generators mainly rely on imports. The research and development of bearing ring materials is an important way to reduce production costs, and there are still deficiencies in the heat treatment process of steel for high-power bearing rings. The low hardenability of the parts in the heat treatment process is Important Causes of Internally Generated Defects

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

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...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
yield strengthaaaaaaaaaa
tensile strengthaaaaaaaaaa
yield strengthaaaaaaaaaa
Login to view more

Abstract

The invention discloses steel for a wind power yaw bearing ring. The steel comprises the following chemical components of, in percentage by mass, 0.44 to 0.45% of C, 0.30 to 0.35% of Si, 0.60 to 0.70%of Mn, 0.16 to 0.18% of Mo, 0.50 to 0.60% of Ni, 1.10 to 1.20% of Cr, 0.0020 to 0.0021% of B, 0.028 to 0.030% of A1 acid solution, 0.09 to 0.10% of V, N less than or equal to 0.002%, O less than or equal to 0.0005%, H less than or equal to 0.00010%, S less than or equal to 0.003%, P less than or equal to 0.008% and the balance Fe and a small amount of impurities. The heat treatment method comprises the following steps that feeding is carried out according to design components, smelting is carried out, casting into a cast ingot is carried out, forging into a forging stock is carried out, the forging material is processed into the wind power yaw bearing ring, heating is carried out to 850 + / -2 DEG C, the temperature is kept for 3-4 hours, austenitizing is carried out, oil quenching is carried out, heating is carried out to 640 DEG C, the temperature is kept for 3 hours, oil cooling is carried out on the material to room temperature; and then surface induction heating quenching is carried out, the heating speed is 85-90 DEG C / s, the heating temperature is 945 DEG C, heat preservation is carried out for 3 s, and then quenching is carried out to the room temperature at the cooling speed of 50-80 DEG C / s. According to the formula, V and Al alloy elements are added, the N content is controlled, and the generation of VN is prevented by utilizing the N fixing effect of the Al element,so that V exists in austenite in a solid solution state, and the hardenability of the steel is improved.

Description

technical field [0001] The invention relates to an alloy steel and a heat treatment method thereof, in particular to a steel for wind power yaw bearing rings and a heat treatment method thereof. Background technique [0002] As a renewable green energy, wind energy is increasingly favored by countries all over the world. In recent years, the development of high-power wind turbines has put forward higher requirements for bearing rings. At present, the key components of generators mainly rely on imports. The research and development of bearing ring materials is an important way to reduce production costs, and there are still deficiencies in the heat treatment process of steel for high-power bearing rings. The low hardenability of the parts in the heat treatment process is An important cause of internally generated defects. In addition, the heat treatment process needs to be further optimized to improve the plasticity, toughness and low temperature impact resistance of the pr...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/54C22C38/06C22C38/46C22C38/44C21D9/40C21D1/18C21D1/10
CPCC21D1/10C21D1/18C21D9/40C22C38/02C22C38/04C22C38/06C22C38/44C22C38/46C22C38/54Y02P10/25
Inventor 顾正明
Owner ZHANGJIAGANG HONGYANG METAL PRODS MFG
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2023 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap