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

Fine-grain steel for engineering machinery track link section and preparation method thereof

A technology of construction machinery and crawler chains, which is applied in the field of steel metallurgy, can solve problems such as coarse grains, and achieve the effects of fine grains, excellent strength and toughness, and enhanced hardenability

Active Publication Date: 2020-06-30
JIANGSU YONGGANG GROUP CO LTD
View PDF7 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of the above technical problems, the present invention proposes a fine-grained steel for track chain rail joints of construction machinery and its preparation method, aiming at solving the problems of compositional design and coarse crystal grains of steel for chain rail joints

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
  • Fine-grain steel for engineering machinery track link section and preparation method thereof
  • Fine-grain steel for engineering machinery track link section and preparation method thereof
  • Fine-grain steel for engineering machinery track link section and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Embodiment 1: The implementation steps of the present invention are specifically illustrated by the preparation method of Ф50 specification round steel.

[0042] 1) Converter smelting: The converter uses high-quality molten iron and scrap steel, and the ratio of scrap steel is 10%. When tapping, the slag is left in double gears to prevent oxidative slag from entering the ladle. Add 120kg of ferrochromium, 550kg of ferromanganese, 300kg of silicon-manganese alloy, 50kg of aluminum ingot, 60kg of recarburizer to deoxidize the alloy; 300kg of pre-melted refining slag and 300kg of lime. The tapping temperature is 1610°C, the end point carbon is 0.10%, and the end point phosphorus is 0.009%.

[0043] 2) LF refining: After the ladle enters the station, the LF furnace is heated up to perform slagging and alloy fine-tuning operations. In the early stage, depending on the thinness and thickness of the top slag in the steel, 50kg of lime was added, and ferrosilicon powder, sili...

Embodiment 2

[0049] Embodiment 2: The implementation steps of the present invention are specifically illustrated by the preparation method of Ф70 specification round steel.

[0050] 1) Converter smelting: The converter adopts high-quality molten iron and scrap steel, and the ratio of scrap steel is 8%. When tapping, the slag is left in double gears to prevent oxidative slag from entering the ladle. 120kg of ferrochrome, 550kg of ferromanganese, 300kg of silicon-manganese alloy, 70kg of aluminum ingot, 60kg of recarburizer are added to the steel for deoxidation of the alloy; 300kg of pre-melted refining slag and 300kg of lime. The tapping temperature is 1614°C, the end point carbon is 0.08%, and the end point phosphorus is 0.008%.

[0051] 2) LF refining: After the ladle enters the station, the LF furnace is heated up to perform slagging and alloy fine-tuning operations. In the early stage, depending on the thinness and thickness of the top slag in the steel, 60kg of lime was added, and f...

Embodiment 3

[0057] Embodiment 3: The implementation steps of the present invention are specifically illustrated by the preparation method of Ф40 specification round steel.

[0058] 1) Converter smelting: The converter adopts high-quality molten iron and scrap steel, and the ratio of scrap steel is 9%. When tapping, the slag is left in double gears to prevent oxidative slag from entering the ladle. 120kg of ferrochromium, 550kg of ferromanganese, 300kg of silicon-manganese alloy, 65kg of aluminum ingot, 60kg of recarburizer are added to the steel for deoxidation of the alloy; 300kg of pre-melted refining slag and 300kg of lime. The tapping temperature is 1612°C, the end point carbon is 0.13%, and the end point phosphorus is 0.010%.

[0059] 2) LF refining: After the ladle enters the station, the LF furnace is heated up to perform slagging and alloy fine-tuning operations. In the early stage, depending on the thinness and thickness of the top slag in the steel, 60kg of lime was added, and...

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
Login to View More

Abstract

The invention provides fine-grain steel for an engineering machinery track link section and a preparation method thereof. The fine-grain steel comprises the following chemical components: by mass, 0.30-0.38% of C, 0.20-0.30% of Si, 1.15-1.35% of Mn, less than or equal to 0.013% of P, less than or equal to 0.003% of S, 0.020-0.032% of Al, 0.0017-0.0030% of B, less than or equal to 0.06% of V, lessthan or equal to 0.04% of Ti, 0.18-0.24% of Cr, less than or equal to 0.012% of Ni, less than or equal to 0.04% of Cu, less than or equal to 0.02% of Mo, less than or equal to 12*10<-6> of [O], less than or equal to 44*10<-6> of [N], and the balance Fe and inevitable impurities. Through the reasonably designed chemical components, the purity of molten steel is improved, heating and rolling technological parameters are controlled, the components of the steel are designed reasonably, the purity and performance of the steel are improved, and the grain size is refined. The fine-grain steel produced through the preparation method has excellent strength and toughens, is fine and uniform in grain size and has the low-power non-metallic inclusion and surface quality.

Description

technical field [0001] The invention belongs to the technical field of steel metallurgy, and in particular relates to a fine-grained steel for engineering machinery crawler chain rail links and a preparation method thereof. Background technique [0002] Construction machinery crawler steel is a steel used in large quantities in construction machinery. It mainly bears complex alternating loads and the working conditions are very harsh. Therefore, the material is required to have comprehensive properties such as high strength, toughness and fatigue strength. With the development of large-scale and light-weight construction machinery, higher requirements are put forward for the strength, toughness, wear resistance and fatigue performance of the material itself. [0003] By searching relevant databases, it was found that CN103160729A "Medium Carbon Microalloyed Engineering Machinery Crawler Chain Segment Steel and Its Production Process" discloses chemical components C0.30-0.37%...

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): C22C38/02C22C38/04C22C38/06C22C38/42C22C38/44C22C38/46C22C38/50C22C38/54C22C33/06C21D8/02C21C7/10C21C7/06C21C5/28
CPCC21C5/28C21C7/06C21C7/10C21D8/0226C21D2211/005C21D2211/009C22C33/06C22C38/001C22C38/002C22C38/02C22C38/04C22C38/06C22C38/42C22C38/44C22C38/46C22C38/50C22C38/54Y02P10/20
Inventor 薛伟江王军查亚鑫王鲁义陆汉刚朱爱华
Owner JIANGSU YONGGANG GROUP CO LTD
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