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Corrosion-resistant linear bearing steel ball and preparation method thereof

A technology of linear bearings and steel balls, applied in shafts and bearings, bearing components, manufacturing tools, etc., can solve the problems of ordinary linear bearings being unusable, damaging other parts and the whole machine, bearing steel balls and steel balls being corroded, and achieving improvement Anti-corrosion performance, extended service life, and improved precision

Active Publication Date: 2019-03-08
宁波恒力汽配轴承有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the steel balls of ordinary linear bearings are mostly made of Gr15 bearing steel, but the steel balls are in point contact with the bearing ring, and the contact with the shaft is also point contact in use. Although the operation is flexible, the bearing capacity is low, and it can be used in actual use. Suitable for use on working surfaces with low load
When the load is heavy, there will be a phenomenon of blockage or linear axis, which will easily cause damage, reduce the operating life, and damage other components and the whole machine
Moreover, ordinary linear bearings cannot be used in special and harsh environments, especially when used in acidic, alkaline and high-humidity environments, the inside and outside of the bearing steel balls and the steel balls will be rusted and corroded in a short period of time

Method used

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  • Corrosion-resistant linear bearing steel ball and preparation method thereof
  • Corrosion-resistant linear bearing steel ball and preparation method thereof
  • Corrosion-resistant linear bearing steel ball and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～4

[0031] The corrosion-resistant linear bearing steel balls in Examples 1-4 include a metal base and a corrosion-resistant layer coated on the metal base, the metal base is made of alloy steel, and the alloy steel includes the following components in mass percentage: 1.28-1.65% C, 0.6~1.0% Cu, 0.4~0.55Mn, 0.15~0.35Si, 1.4~1.5%Cr, 0.8~1.5%Bi, 0.1~0.3%Ni, 0.15~0.25%Ti, 1.3~1.8%Ta, 10~ 13% nano-ceramic, the balance is Fe.

[0032] The nano-ceramic comprises the following components in mass percentage, 32-38% of nano-AlN, 20-25% of nano-β-SiC, and the balance of nano-BeO.

[0033]The corrosion-resistant layer is an organic hydrophobic coating with a thickness of 0.5-3 μm.

[0034] The composition of the metal matrix in Examples 1-4 is shown in the table below.

[0035] Table 1: Composition of metal substrates in Examples 1-4

[0036]

[0037] The composition and mass percent and the thickness of the corrosion-resistant layer of nano-ceramics in Examples 1 to 4 are shown in the...

Embodiment 5

[0041] The preparation method of corrosion-resistant linear bearing steel ball in the present invention comprises the following steps,

[0042] (1), prepare the raw material according to the composition and mass percentage of the alloy steel in Example 3, melt the raw material into a melt, pour the melt into the forming mold at 1280° C. When the internal temperature drops to 890°C, it is kept for 3 hours, and then slowly lowered to 250°C for 3 hours to prepare a green body. A heating and cooling device is installed in the forming mold. The heating device is a resistance wire installed in the forming mold, and the cooling device is set The cooling pipeline in the forming mold, the cooling medium is passed through the pipeline;

[0043] (2) After heat-treating the green body in the forming mold, the cooked body is obtained. The heat treatment process is to control the heating and cooling device of the forming mold, first heat the temperature to 560 ° C, keep it for 3 hours, then...

Embodiment 6

[0047] The preparation method of corrosion-resistant linear bearing steel ball in the present invention comprises the following steps,

[0048] (1), prepare raw materials according to the composition and mass percentage of the alloy steel in Example 3, smelt the raw materials into a molten liquid, pour the molten liquid into a forming mold at 1320 ° C after refining and removing slag, and pour it into the forming mold after pouring When the internal temperature drops to 930°C, keep it warm for 2.5 hours, then slowly cool down to 300°C and keep it warm for 2.5 hours to make a green body. A heating and cooling device is installed in the forming mold. The heating device is a resistance wire set in the forming mold. The cooling device It is a cooling pipeline arranged in the forming mold, and a cooling medium is passed through the pipeline;

[0049] (2) After heat-treating the green body in the forming mold, the cooked body is obtained. The process of heat treatment is to control ...

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Abstract

The invention relates to an anti-corrosion linear bearing steel ball and a preparation method thereof and belongs to the technical field of mechanical manufacturing. According to the anti-corrosion linear bearing steel ball, the linear bearing steel ball comprises a metal matrix and an anti-corrosion layer, wherein the metal matrix is coated with the anti-corrosion layer and is made of alloy steel; and the alloy steel comprises the following components of, by mass, 1.28-1.65% of C, 0.6-1.0% of Cu, 0.4-0.55% of Mn, 0.15-0.35% of Si, 1.4-1.5% of Cr, 0.8-1.5% of Bi, 0.1-0.3% of Ni, 0.15-0.25% ofTi, 1.3-1.8% of Ta, 10-13% of nanometer ceramic and the balance Fe. The linear bearing steel ball is good in anti-corrosion property, high in strength and good in impact resistance.

Description

technical field [0001] The invention belongs to the technical field of mechanical manufacturing, and relates to a corrosion-resistant linear bearing steel ball and a preparation method thereof. Background technique [0002] A linear bearing is a linear motion system used in conjunction with a cylindrical shaft for linear travel. Since the bearing ball is in point contact with the outer shell of the bearing, the steel ball rolls with the minimum frictional resistance, so the linear bearing has small friction and is relatively stable, does not change with the bearing speed, and can obtain smooth linear motion with high sensitivity and high precision. [0003] At present, the steel balls of ordinary linear bearings are mostly made of Gr15 bearing steel, but the steel balls are in point contact with the bearing ring, and the contact with the shaft is also point contact in use. Although the operation is flexible, the bearing capacity is low, and it can be used in actual use. It ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/50C22C38/48C22C38/42C22C38/04C22C38/02C21D9/36C09D1/00C09D127/06C09D5/08C09D5/16C09D7/61C09D7/63B05D7/14F16C33/32
Inventor 郑世良梅雪成
Owner 宁波恒力汽配轴承有限公司