Special steel and processing technique of high-wear-resistance bearing

Abstract

The invention discloses a special steel of a high-wear-resistance bearing. The blank comprises the following chemical components in percentage by mass: 0.21-0.23% of C, 0.07-0.09% of Si, 0.66-0.68% of Mn, 0.83-0.85% of Ni, 9.1-9.3% of Cr, 0.55-0.57% of Mo, 0.13-0.15% of V, 0.11-0.13% of Nb, 0.01-0.03% of Cu, 0.19-0.21% of Ti, 0.05-0.07% of B, at most 0.025% of S, at most 0.015% of P, 0.12-0.14% of rare-earth metal and the balance of Fe. The rare-earth metal comprises the following chemical components in percentage by mass: 2-4% of cerium, 11-13% of neodymium, 3-5% of gadolinium, 4-6% of lutetium, 5-7% of dysprosium, 1-3% of europium, 8-10% of erbium and the balance of lanthanum. The invention also discloses a processing technique of the high-wear-resistance bearing, which comprises the following steps: forging, annealing, tempering, turning, carburizing and heat treatment. The product has the characteristics of high working size precision, stable inherent quality, excellent properties, long service life and high reliability.

Description

technical field

[0001] The invention belongs to the technical field of mechanical transmission, and relates to a special steel material for a high wear-resistant bearing, in particular to a special steel material for a high wear-resistant bearing and its processing technology. Background technique

[0002] Bearing is an important component in contemporary mechanical equipment. It plays a role in fixing and reducing the friction coefficient of load during mechanical transmission. When other parts move relative to each other on the shaft, it is used to reduce the load during power transmission. Its main function is to support the mechanical rotating body to reduce the friction coefficient of the mechanical load of the equipment during the transmission process.

[0003] At present, in my country, the production concentration of the bearing industry is low, and the R&D and innovation capabilities are low. Since most enterprises are still at a low level in the construction and op...

Examples

Embodiment 1

[0049] This embodiment provides a special steel for high wear-resistant bearings. The mass percentage of the chemical composition of the blank is: C: 0.21%, Si: 0.07%, Mn: 0.66%, Ni: 0.83%, Cr: 9.1%, Mo : 0.55%, V: 0.13%, Nb: 0.11%, Cu: 0.01%, Ti: 0.19%, B: 0.05%, S: 0.025%, P: 0.015%, rare earth metal: 0.12%, and the balance is Fe;

[0050] Among them, the chemical composition mass percentage of rare earth metals is: cerium: 4%, neodymium: 13%, gadolinium: 5%, lutetium: 6%, dysprosium: 7%, europium: 3%, erbium: 10%, and the balance is lanthanum .

[0051] This embodiment also provides a high wear-resistant bearing processing technology, including forging, annealing, tempering, turning, carburizing and heat treatment:

[0052] Forging process: Keep the workpiece blank at 830°C for free forging for 18 minutes;

[0053] Annealing process: After hot forging, keep warm at 785°C for 12 minutes, then cool to 235°C in the furnace, keep warm for 8 minutes, and finally cool to room t...

Embodiment 2

[0059] This embodiment provides a special steel for high wear-resistant bearings. The mass percentage of the chemical composition of the blank is: C: 0.23%, Si: 0.09%, Mn: 0.68%, Ni: 0.85%, Cr: 9.3%, Mo : 0.57%, V: 0.15%, Nb: 0.13%, Cu: 0.03%, Ti: 0.21%, B: 0.07%, S: 0.02%, P: 0.01%, rare earth metal: 0.14%, and the balance is Fe;

[0060] Among them, the chemical composition mass percentage of rare earth metals is: cerium: 2%, neodymium: 11%, gadolinium: 3%, lutetium: 4%, dysprosium: 5%, europium: 1%, erbium: 8%, and the balance is lanthanum .

[0061] This embodiment also provides a high wear-resistant bearing processing technology, including forging, annealing, tempering, turning, carburizing and heat treatment:

[0062] Forging process: keep the workpiece blank at 850°C for free forging for 16 minutes;

[0063] Annealing process: After hot forging, keep warm at 795°C for 10 minutes, then cool to 245°C in the furnace, keep warm for 6 minutes, and finally cool to room temp...

Embodiment 3

[0069] This embodiment provides a special steel for high wear-resistant bearings, the mass percentage of the chemical composition of the blank is: C: 0.22%, Si: 0.08%, Mn: 0.67%, Ni: 0.84%, Cr: 9.2%, Mo : 0.56%, V: 0.14%, Nb: 0.12%, Cu: 0.02%, Ti: 0.20%, B: 0.06%, S: 0.022%, P: 0.013%, rare earth metal: 0.13%, and the balance is Fe;

[0070] Among them, the chemical composition mass percentage of rare earth metals is: cerium: 3%, neodymium: 12%, gadolinium: 4%, lutetium: 5%, dysprosium: 6%, europium: 2%, erbium: 9%, and the balance is lanthanum .

[0071] This embodiment also provides a high wear-resistant bearing processing technology, including forging, annealing, tempering, turning, carburizing and heat treatment:

[0072] Forging process: keep the workpiece blank at 840°C for free forging for 17 minutes;

[0073] Annealing process: After hot forging, keep warm at 790°C for 11 minutes, then cool to 240°C in the furnace, keep warm for 7 minutes, and finally cool to room te...

technical field

[0001] The invention belongs to the technical field of mechanical transmission, and relates to a special steel material for a high wear-resistant bearing, in particular to a special steel material for a high wear-resistant bearing and its processing technology. Background technique

[0002] Bearing is an important component in contemporary mechanical equipment. It plays a role in fixing and reducing the friction coefficient of load during mechanical transmission. When other parts move relative to each other on the shaft, it is used to reduce the load during power transmission. Its main function is to support the mechanical rotating body to reduce the friction coefficient of the mechanical load of the equipment during the transmission process.

[0003] At present, in my country, the production concentration of the bearing industry is low, and the R&D and innovation capabilities are low. Since most enterprises are still at a low level in the construction and op...

Examples

Embodiment 1

[0049] This embodiment provides a special steel for high wear-resistant bearings. The mass percentage of the chemical composition of the blank is: C: 0.21%, Si: 0.07%, Mn: 0.66%, Ni: 0.83%, Cr: 9.1%, Mo : 0.55%, V: 0.13%, Nb: 0.11%, Cu: 0.01%, Ti: 0.19%, B: 0.05%, S: 0.025%, P: 0.015%, rare earth metal: 0.12%, and the balance is Fe;

[0050] Among them, the chemical composition mass percentage of rare earth metals is: cerium: 4%, neodymium: 13%, gadolinium: 5%, lutetium: 6%, dysprosium: 7%, europium: 3%, erbium: 10%, and the balance is lanthanum .

[0051] This embodiment also provides a high wear-resistant bearing processing technology, including forging, annealing, tempering, turning, carburizing and heat treatment:

[0052] Forging process: Keep the workpiece blank at 830°C for free forging for 18 minutes;

[0053] Annealing process: After hot forging, keep warm at 785°C for 12 minutes, then cool to 235°C in the furnace, keep warm for 8 minutes, and finally cool to room t...

Embodiment 2

[0059] This embodiment provides a special steel for high wear-resistant bearings. The mass percentage of the chemical composition of the blank is: C: 0.23%, Si: 0.09%, Mn: 0.68%, Ni: 0.85%, Cr: 9.3%, Mo : 0.57%, V: 0.15%, Nb: 0.13%, Cu: 0.03%, Ti: 0.21%, B: 0.07%, S: 0.02%, P: 0.01%, rare earth metal: 0.14%, and the balance is Fe;

[0060] Among them, the chemical composition mass percentage of rare earth metals is: cerium: 2%, neodymium: 11%, gadolinium: 3%, lutetium: 4%, dysprosium: 5%, europium: 1%, erbium: 8%, and the balance is lanthanum .

[0061] This embodiment also provides a high wear-resistant bearing processing technology, including forging, annealing, tempering, turning, carburizing and heat treatment:

[0062] Forging process: keep the workpiece blank at 850°C for free forging for 16 minutes;

[0063] Annealing process: After hot forging, keep warm at 795°C for 10 minutes, then cool to 245°C in the furnace, keep warm for 6 minutes, and finally cool to room temp...

Embodiment 3

[0069] This embodiment provides a special steel for high wear-resistant bearings, the mass percentage of the chemical composition of the blank is: C: 0.22%, Si: 0.08%, Mn: 0.67%, Ni: 0.84%, Cr: 9.2%, Mo : 0.56%, V: 0.14%, Nb: 0.12%, Cu: 0.02%, Ti: 0.20%, B: 0.06%, S: 0.022%, P: 0.013%, rare earth metal: 0.13%, and the balance is Fe;

[0070] Among them, the chemical composition mass percentage of rare earth metals is: cerium: 3%, neodymium: 12%, gadolinium: 4%, lutetium: 5%, dysprosium: 6%, europium: 2%, erbium: 9%, and the balance is lanthanum .

[0071] This embodiment also provides a high wear-resistant bearing processing technology, including forging, annealing, tempering, turning, carburizing and heat treatment:

[0072] Forging process: keep the workpiece blank at 840°C for free forging for 17 minutes;

[0073] Annealing process: After hot forging, keep warm at 790°C for 11 minutes, then cool to 240°C in the furnace, keep warm for 7 minutes, and finally cool to room te...