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

Manufacturing method of low-oxygen low-inclusion bearing steel

A technology for bearing steel and impurities, applied in the direction of manufacturing converters, etc., can solve the problems of uneven distribution of non-metallic inclusions, and the difficulty of steel performance to meet strict standard requirements.

Inactive Publication Date: 2018-08-03
温州市赢创新材料技术有限公司
View PDF3 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the bearing steel prepared by this method still has the problem of uneven distribution of non-metallic inclusions, and the performance of the steel is difficult to meet the strict standard requirements

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
  • Manufacturing method of low-oxygen low-inclusion bearing steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055]A method for preparing low-oxygen and low-inclusion bearing steel, including raw material preparation, converter smelting and alloying, LF+VD refining, continuous casting, rolling, slow cooling; controlling the chemical composition mass percentage of the bearing steel to be C 1.06, Si 0.7, Mn 1.30, Mo0.02, Ni 0.06, Cr 1.85, Co 0.02, V 0.02, Al S 0.01, Hf 0.02, Ta 0.01, Te 0.005, Cu0.05, S≤0.025, P≤0.025, [O]≤10×10 -6 , [H]≤2×10 -6 , the remainder being Fe and unavoidable impurities; The specific production steps are as follows:

[0056] (1) Raw material preparation

[0057] The converter with a capacity of 300t is used as the standard raw material, among which molten iron with P≤0.07%, S≤0.02% accounts for 87~88%, and scrap steel with P≤0.07%, S≤0.02%, Ti≤0.05% accounts for 8-10% %, the rest is iron lumps with P≤0.07%, S≤0.02%;

[0058] (2) Converter smelting

[0059] Converter smelting is used, the end point phosphorus is ≤0.01%, the end point carbon is ≥0.25%, th...

Embodiment 2

[0071] A method for preparing low-oxygen and low-inclusion bearing steel, including raw material preparation, converter smelting and alloying, LF+VD refining, continuous casting, rolling, and slow cooling; the chemical composition mass percentage content of the controlled bearing steel is C 1.08, Si 0.72, Mn 1.32, Mo0.04, Ni 0.07, Cr 1.88, Co 0.03, V 0.025, Al S 0.02, Hf 0.025, Ta 0.018, Te 0.006, Cu0.8, S≤0.025, P≤0.025, [O]≤10×10 -6 , [H]≤2×10 -6 , the remainder being Fe and unavoidable impurities; The specific production steps are as follows:

[0072] (1) Raw material preparation

[0073] The converter with a capacity of 300t is used as the standard raw material, among which molten iron with P≤0.07%, S≤0.02% accounts for 87~88%, and scrap steel with P≤0.07%, S≤0.02%, Ti≤0.05% accounts for 8-10% %, the rest is iron lumps with P≤0.07%, S≤0.02%;

[0074] (2) Converter smelting

[0075] Converter smelting is used, the end point phosphorus is ≤0.01%, the end point carbon i...

Embodiment 3

[0087] A method for preparing low-oxygen and low-inclusion bearing steel, including raw material preparation, converter smelting and alloying, LF+VD refining, continuous casting, rolling, slow cooling; controlling the chemical composition mass percentage of bearing steel to be C 1.1, Si0 .75, Mn 1.35, Mo0.05, Ni 0.08, Cr 1.9, Co 0.04, V 0.03, Al S 0.03, Hf 0.03, Ta 0.02, Te 0.008, Cu 0.1, S≤0.025, P≤0.025, [O]≤10×10 -6 , [H]≤2×10 -6 , the remainder being Fe and unavoidable impurities; The specific production steps are as follows:

[0088] (1) Raw material preparation

[0089] The converter with a capacity of 300t is used as the standard raw material, among which molten iron with P≤0.07%, S≤0.02% accounts for 87~88%, and scrap steel with P≤0.07%, S≤0.02%, Ti≤0.05% accounts for 8-10% %, the rest is iron lumps with P≤0.07%, S≤0.02%;

[0090] (2) Converter smelting

[0091] Converter smelting is used, the end point phosphorus is ≤0.01%, the end point carbon is ≥0.25%, the temp...

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

No PUM Login to View More

Abstract

The invention discloses a manufacturing method of low-oxygen low-inclusion bearing steel. The manufacturing method comprises the steps of preparing of raw materials, converter smelting and alloying, LF+VD refining, continuous casting, rolling and slow cooling, wherein the mass percent of chemical components of the bearing steel in content is controlled to reach the standards of 1.06-1.1% of C, 0.7-0.75% of Si, 1.30-1.35% of Mn, 0.02-0.05% of Mo, 0.06-0.08% of Ni, 1.85-1.9% of Cr, 0.02-0.04% of Co, 0.02-0.03% of V, 0.01-0.03% of Als, 0.02-0.03% of Hf, 0.01-0.02% of Ta, 0.005-0.008% of Te, 0.05-0.1% of Cu, less than or equal to 0.025% of S, less than or equal to 0.025 of P, less than or equal to 10*10<-6> of O, less than or equal to 2*10<-6> of H and the balance Fe and inevitable impurities.According to the manufacturing method of the low-oxygen low-inclusion bearing steel smelting, the raw materials, the refining process, refining slag, crystallizer casting powder and the continuous casting process are controlled, so that the content of the obtained non-metal impurities of the bearing steel is low, and the content of the Ti is low; the phenomenon of nozzle nodulation is avoided inthe continuous casting process of square billets, blank throwing is smooth, the solidification speed of a blank shell is high, and safety of continuous casting is ensured, so that a final product is uniform in component, stable in performance and good in strength; and after heat treatment, the yield strength reaches 700 MPa, the tensile strength reaches 910 MPa, and the elongation at the cross section reaches 35%.

Description

technical field [0001] The invention relates to a method for producing bearing steel, in particular to a method for producing high-carbon chromium bearing steel using a converter and a continuous casting machine. Background technique [0002] High-carbon chromium bearing steel is mainly used for steel balls, rollers and rings on bearings of automobiles, motorcycles, household appliances, tractors, railway vehicles, metallurgical and mining machinery, and high-speed rotating, high-load mechanical bearings. Before the present invention, the domestic traditional bearing steel production process is: electric furnace smelting→LF furnace refining→vacuum refining→die casting or continuous casting→rolling→slow cooling hood slow cooling (air cooling). The production of high-carbon chromium bearing steel by electric furnace and vacuum treatment has many procedures, long cycle, difficult smelting organization and high production cost. [0003] High-carbon chromium bearing steel is the...

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
IPC IPC(8): C22C38/02C22C38/04C22C38/44C22C38/52C22C38/46C22C38/06C22C38/48C22C38/60C22C38/42C22C33/04C21D8/00C21D1/26C21D1/18B22D11/111C21C5/36C21C7/06C21C7/10
CPCB22D11/111C21C5/36C21C7/06C21C7/10C21D1/18C21D1/26C21D8/005C22C33/04C22C38/002C22C38/02C22C38/04C22C38/06C22C38/42C22C38/44C22C38/46C22C38/48C22C38/52C22C38/60
Inventor 周建武
Owner 温州市赢创新材料技术有限公司
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