High-hardness low-carbon bearing steel ball

A bearing steel ball, high hardness technology, applied in the direction of furnace type, furnace, heat treatment furnace, etc., can solve the problems of easy cracking, low impact toughness, reducing the hardness of steel balls and wear resistance

Inactive Publication Date: 2017-08-04
芜湖市永帆精密模具科技有限公司
View PDF8 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the existing bearing steel balls mainly use high-carbon bearing steel GCr15 as raw material, which has the advantages of high hardness and good wear resistance, but its impact toughness is low and it is easy to crack; people usually increase the steel ball by reducing the carbon content. Toughness, but low carbon content will reduce the hardness and wear resistance of steel balls

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • High-hardness low-carbon bearing steel ball

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A high-hardness low-carbon bearing steel ball, the weight percentage of each component is as follows: C: 0.15%, Cr: 13.5%, W: 1.2%, Co: 3.5%, V: 0.25%, Si: 0.35%, Mn : 0.2%, Ni: 0.25%, B: 0.007%, S≤0.015%, P≤0.015%, Mo: 0.575%, and the remainder is Fe.

Embodiment 2

[0019] A high-hardness low-carbon bearing steel ball, the weight percentage of each component is as follows: C: 0.1%, Cr: 14%, W: 1%, Co: 4%, V: 0.22%, Si: 0.4%, Mn : 0.1%, Ni: 0.3%, B: 0.006%, S≤0.015%, P≤0.015%, Mo: 0.9%, the remainder is Fe;

[0020] Among them, in the preparation process of high-hardness low-carbon bearing steel balls, scrap steel is smelted, carbon, chromium, molybdenum, tungsten, cobalt, vanadium, silicon, manganese, nickel, boron are added, rough refining, refining, casting out of the furnace, cleaning and polishing A smooth spherical ingot satisfying the above-mentioned components was obtained, wherein the casting temperature was 1500°C; the spherical ingot was taken, heated to 940°C in a propane atmosphere, and the carbon potential was adjusted to 1.4%. 0.95%, heat preservation for 6 hours, then adjust the temperature to 500°C, heat preservation and tempering for 4 hours, then raise the temperature to 990°C, heat preservation for 40 minutes, water que...

Embodiment 3

[0022] A high-hardness low-carbon bearing steel ball, the weight percentage of each component is as follows: C: 0.2%, Cr: 13%, W: 1.5%, Co: 3%, V: 0.28%, Si: 0.3%, Mn : 0.3%, Ni: 0.2%, B: 0.008%, S≤0.015%, P≤0.015%, Mo: 0.3%, the remainder is Fe;

[0023] Among them, in the preparation process of high-hardness low-carbon bearing steel balls, scrap steel is smelted, carbon, chromium, molybdenum, tungsten, cobalt, vanadium, silicon, manganese, nickel, boron are added, rough refining, refining, casting out of the furnace, cleaning and polishing A smooth spherical ingot satisfying the above composition was obtained, wherein the casting temperature was 1460°C; the spherical ingot was taken, heated to 950°C in a propane atmosphere, and the carbon potential was adjusted to 1.3%. 0.91%, heat preservation for 6.5 hours, then adjust the temperature to 480°C, heat preservation and tempering for 6 hours, then raise the temperature to 970°C, heat preservation for 60 minutes, water quench t...

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
thicknessaaaaaaaaaa
Login to view more

Abstract

The invention discloses a high-hardness low-carbon bearing steel ball. The high-hardness low-carbon bearing steel ball comprises the following components by weight percent: 0.1% to 0.2% of C, 13% to 14% of Cr, 1% to 1.5% of W, 3% to 4% of Co, 0.22% to 0.28% of V, 0.3% to 0.4% of Si, 0.1% to 0.3% of Mn, 0.2% to 0.3% of Ni, 0.006% to 0.008% of B, 0.015% or less of S, 0.015% or less of P, and Mo, and the balance being Fe, wherein Mo weight percent equals to Ni weight percent * (Co weight percent-W weight percent)* 100. The high-hardness low-carbon bearing steel ball is high in hardness, high in strength, good in toughness and good in fatigue resistance.

Description

technical field [0001] The invention relates to the technical field of steel balls, in particular to a high-hardness low-carbon bearing steel ball. Background technique [0002] At present, the existing bearing steel balls mainly use high-carbon bearing steel GCr15 as raw material, which has the advantages of high hardness and good wear resistance, but its impact toughness is low and it is easy to crack; people usually increase the steel ball by reducing the carbon content. Toughness, but lower carbon content will reduce the hardness and wear resistance of steel balls. Contents of the invention [0003] Based on the technical problems existing in the background technology, the present invention proposes a high-hardness low-carbon bearing steel ball, which has high hardness, high strength, good toughness and good fatigue resistance. [0004] A high-hardness low-carbon bearing steel ball proposed by the present invention has the weight percentages of its components as follo...

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): C22C38/46C22C38/52C22C38/44C22C38/54C22C38/02C22C38/04C23C8/22C21D1/18C21D6/04C21D9/36
CPCC22C38/46C21D1/18C21D6/004C21D6/04C21D9/36C21D2211/001C21D2211/008C22C38/02C22C38/04C22C38/44C22C38/52C22C38/54C23C8/22
Inventor 吴水金
Owner 芜湖市永帆精密模具科技有限公司
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.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap