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Self-lubricating alloy high-hardness bearing

A high-hardness, self-lubricating technology, used in bearing components, shafts and bearings, mechanical equipment, etc., can solve the problems of insufficient ball hardness and large wear, and achieve the effect of long service life, improved service life and high hardness

Inactive Publication Date: 2016-12-14
NINGBO DAER MACHINERY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Rolling bearings are mainly ball bearings, which are general-purpose parts, but the hardness of the balls is insufficient and the wear is relatively large

Method used

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  • Self-lubricating alloy high-hardness bearing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The invention proposes a self-lubricating alloy high-hardness bearing, which includes a bearing outer ring, balls and a bearing inner ring, wherein the outer raceway surface of the bearing inner ring is coated with polytetrafluoroethylene, and the ball is an iron alloy, and its components are calculated by weight percentage Including: C: 0.2%, Si: 0.6%, B: 0.04%, V: 0.3%, Ni: 0.05%, Mo: 0.3%, Nb: 0.13%, Al: 0.4%, Cr: 3.2%, Zr: 0.1 %, Sc: 0.05%, Y: 0.1%, S≤0.015%, P≤0.02%, and the balance is Fe.

Embodiment 2

[0030]The invention proposes a self-lubricating alloy high-hardness bearing, which includes a bearing outer ring, balls and a bearing inner ring, wherein the outer raceway surface of the bearing inner ring is coated with polytetrafluoroethylene, and the ball is an iron alloy, and its components are calculated by weight percentage Including: C: 0.5%, Si: 0.3%, B: 0.07%, V: 0.1%, Ni: 0.08%, Mo: 0.2%, Nb: 0.17%, Al: 0.2%, Cr: 4.0%, Zr: 0.07 %, Sc: 0.08%, Y: 0.07%, S≤0.015%, P≤0.02%, and the balance is Fe.

[0031] The preparation process of the ball includes: smelting, casting and heat treatment; wherein the heat treatment includes: austenitizing treatment, austempering and tempering.

Embodiment 3

[0033] The invention proposes a self-lubricating alloy high-hardness bearing, which includes a bearing outer ring, balls and a bearing inner ring, wherein the outer raceway surface of the bearing inner ring is coated with polytetrafluoroethylene, and the ball is an iron alloy, and its components are calculated by weight percentage Including: C: 0.25%, Si: 0.55%, B: 0.045%, V: 0.28%, Ni: 0.055%, Mo: 0.29%, Nb: 0.135%, Al: 0.38%, Cr: 3.3%, Zr: 0.095 %, Sc: 0.055%, Y: 0.095%, S≤0.015%, P≤0.02%, and the balance is Fe.

[0034] The preparation process of the ball includes: smelting, casting and heat treatment; wherein the heat treatment includes: austenitizing treatment, austempering and tempering.

[0035] The temperature of austenitizing treatment is 920°C, and the time of austenitizing treatment is 3h.

[0036] The specific operation of isothermal quenching is as follows: air-cool the austenitized material to 400°C, then place it in a nitrate salt bath for 38 minutes, the tempe...

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Abstract

The invention discloses a self-lubricating alloy high-hardness bearing which comprises a bearing outer ring, a ball and a bearing inner ring; polytetrafluoroethylene is used for coating an outer roller surface of the bearing inner ring; the ball is made of an iron alloy; and the iron alloy consists of the following components in percentage by weight: 0.2-0.5% of C, 0.3-0.6% of Si, 0.04-0.07% of B, 0.1-0.3% of V, 0.05-0.08% of Ni, 0.2-0.3% of Mo, 0.13-0.17% of Nb, 0.2-0.4% of Al, 3.2-4.0% of Cr, 0.07-0.1% of Zr, 0.05-0.08% of Sc, 0.07-0.1% of Y, less than or equal to 0.015% of S, less than or equal to 0.02% of P and the balance Fe. The self-lubricating alloy high-hardness bearing is small in friction force, is less in abrasion, is great in hardness, is excellent in toughness, is good in contact fatigue strength and is long in service life.

Description

technical field [0001] The invention relates to the technical field of bearings, in particular to a self-lubricating alloy high-hardness bearing. Background technique [0002] Bearings are common mechanical parts used to support journals or rotating parts on shafts. They are used to determine the relative movement position of the rotating shaft and other parts, reduce the friction coefficient during its movement, and ensure its rotation accuracy, its quality and carrying capacity. It directly affects the working performance of the whole machine. [0003] According to the working principle of the bearing, it can be divided into rolling friction bearing (rolling bearing) and sliding friction bearing (sliding bearing). Rolling bearings are mainly ball bearings, which are general-purpose parts, but the hardness of the balls is insufficient and the wear is relatively large. Contents of the invention [0004] Based on the technical problems existing in the background technolog...

Claims

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Application Information

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IPC IPC(8): C22C38/18C22C38/02C22C38/32C22C38/12C22C38/08C22C38/06C22C38/14C21D1/20F16C33/58F16C33/32
CPCC22C38/18C21D1/20C21D6/004C21D2211/002C22C38/005C22C38/02C22C38/06C22C38/08C22C38/12C22C38/14C22C38/32F16C33/32F16C33/585
Inventor 卢顺俊
Owner NINGBO DAER MACHINERY TECH CO LTD
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