Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

High-toughness carburized bearing steel with ultra-long contact fatigue life and preparation method thereof

A tough carburizing bearing, contact fatigue technology, applied in the field of alloy steel, to achieve the effect of less Paralympics, bearing impact load, toughness and fatigue performance improvement

Active Publication Date: 2013-03-20
CENT IRON & STEEL RES INST
View PDF5 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the comprehensive mechanical properties and ultra-long contact fatigue properties obtained based on composition and process optimization have not been reported yet.

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-toughness carburized bearing steel with ultra-long contact fatigue life and preparation method thereof
  • High-toughness carburized bearing steel with ultra-long contact fatigue life and preparation method thereof
  • High-toughness carburized bearing steel with ultra-long contact fatigue life and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] According to the chemical composition range designed by the present invention, 4 furnaces (number 1-4) of the invention steel were smelted on a 400kg vacuum induction furnace and a vacuum consumable furnace, and in addition 3 groups of Cr-Ni-Mo comparison steel (number 5-7) , No. 5 is 20GrNiMo, No. 6 is 18Gr2Ni4Mo, and No. 7 is 20Gr2Ni4A. The specific chemical composition is shown in Table 1. The content of P and S elements in the invention steel is significantly lower than that of the comparison steel.

[0026] Invention Steel first carries out the ratio of alloying elements on the basis of selected low-phosphorus-sulfur raw materials. Through vacuum smelting, it is cast into ingots. The diameter of the ingot is not less than Φ360mm. The temperature is 1050°C, the final forging (rolling) temperature is 880°C, and finally rolled into Φ120 and Φ85 bars. Invention steel and comparison steel were processed into standard room temperature tensile specimens, Charpy notch impa...

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
tensile strengthaaaaaaaaaa
bending fatigue strengthaaaaaaaaaa
crystal sizeaaaaaaaaaa
Login to View More

Abstract

The invention relates to a high-toughness carburized bearing steel with ultra-long contact fatigue life and a preparation method thereof, belonging to the technical field of alloy steel. The steel comprises the following chemical components in percentage by weight: 0.16-0.24% of C, at most 0.10% of Si, at most 0.10% of Mn, 0.30-1.50% of Cr, 1.5-4.5% of Ni, 0.30-1.50% of Mo, 0.02-0.10% of Nb, 0.3-0.9% of V, and the balance of Fe and inevitable impurities, wherein [N]+[O]+[H]+P+S<=0.0080%, and Ti<=0.0030%. The invention particularly relates to a high-toughness carburized bearing steel which has the advantages of high shock resistance load, stable dimension and ultra-long contact fatigue life in the serve process. Compared with the prior art, the invention has the advantages of high surface hardness, high core toughness, high dimensional stability, high bending fatigue strength limit and ultra-long contact fatigue life.

Description

technical field [0001] The invention belongs to the technical field of alloy steel, and in particular provides a high-strength and tough carburized bearing steel with super-long contact fatigue life and a preparation method. Background technique [0002] As a key component of the transmission system of high-speed trains, special vehicles, metallurgical and engineering machinery, bearings are not only the constraints on the performance, life and reliability of the whole machine, but also affect the stability and safety of the whole machine. As the transmitted energy increases, the speed, temperature and life increase, especially the strong impact of the wheel-set bearings caused by the severe snaking motion of the high-speed train and the high impact load of the rolling mill bearings, requiring the bearings to have higher load-carrying capacity, that is, bearing steel The core has high strength and toughness, and the surface is super-hardened; the bearing can work continuousl...

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 Patents(China)
IPC IPC(8): C22C38/48C21D8/00C23F17/00
Inventor 杨卯生周清跃张斌俞峰李建新刘丰收何金光赵开礼
Owner CENT IRON & STEEL RES INST
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com