Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Medium alloy ultrahigh strength and toughness rare earth steel and preparation method thereof

An ultra-high toughness, rare earth technology, applied in the field of medium alloy ultra-high toughness rare earth steel and its preparation, can solve the problems of smelting process output limitation, achieve high hardness, high toughness, and improve the effect of toughness

Active Publication Date: 2019-07-26
日照市质量检验检测研究院(国家碳素结构钢产品质量检验检测中心(山东)日照市药品不良反应监测中心日照市纺织纤维监测中心
View PDF4 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the need for vacuum induction + vacuum self-consumption smelting, the price of large-size bars of this steel reaches 80,000 yuan / ton, and the output is greatly limited due to the harsh smelting process

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
  • Medium alloy ultrahigh strength and toughness rare earth steel and preparation method thereof
  • Medium alloy ultrahigh strength and toughness rare earth steel and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] An ultra-high strength and toughness rare earth steel, comprising the following components in mass fraction: C: 0.26%-0.31%, Mn: 0.50%-0.80%, Si: 1.25%-1.60%, S: ≤0.005%, P: ≤0.010 %, Cr: 3.25%~3.60%, Ni: 0.80%~1.20%, Mo: 0.35%~0.60%, W: 0.40%~1.00%, Nb: 0.02%~0.04%, V: 0.20%~0.40%, La: 0.0045% to 0.006%, Ce: 0.0105% to 0.014%.

[0019] As a preferred embodiment of the present invention, the ultra-high-strength rare earth steel includes the following components in mass fraction: C: 0.28% to 0.29%, Mn: 0.60% to 0.70%, Si: 1.35% to 1.45%, S: ≤0.005 %, P: ≤0.010%, Cr: 3.35%~3.45%, Ni: 0.90%~1.00%, Mo: 0.45%~0.50%, W: 0.60%~0.80%, Nb: 0.02%~0.03%, V: 0.20% to 0.30%, La: 0.005% to 0.006%, Ce: 0.011% to 0.012%.

[0020] The preparation method of ultra-high-strength rare-earth steel provided by the present invention comprises the following steps: electric furnace smelting→LF furnace refining→VD vacuum degassing→argon protection pouring electrodeelectrode flame cutting riser...

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
Lengthaaaaaaaaaa
Widthaaaaaaaaaa
Login to View More

Abstract

The invention provides a kind of medium alloy ultrahigh strength and toughness rare earth steel and relates to the technical field of rare earth steel, in particular to medium alloy ultrahigh strengthand toughness rare earth steel and a preparation method thereof. The medium alloy ultrahigh strength and toughness rare earth steel is characterized by comprising, by mass, 0.26%-0.31% of C, 0.50%-0.80% of Mn, 1.25%-1.60% of Si, less than or equal to 0.005% of S, less than or equal to 0.010% of P, 3.25%-3.60% of Cr, 0.80%-1.20% of Ni, 0.35%-0.60% of Mo, 0.40%-1.00% of W, 0.02%-0.04% of Nb, 0.20%-0.40% of V, 0.0045%-0.006% of La and 0.0105%-0.014% of Ce. The medium alloy ultrahigh strength and toughness rare earth steel has the characteristics of being high in strength, hardness, toughness andthe like, can also reduce the production cost and achieves a lot of positive effects meeting the application requirements.

Description

technical field [0001] The invention relates to the technical field of rare-earth steel, in particular to a medium-alloy ultra-high-strength rare-earth steel and a preparation method thereof. Background technique [0002] At present, ultra-high-strength steel can be divided into three categories: high-alloy maraging steel, high-alloy secondary hardening steel and low-alloy steel. Although the existing high-alloy maraging steel and high-alloy secondary hardening steel have good strength and toughness, both are high-alloy steels, which contain a large amount of alloying elements such as Co, Ni, and Mo, resulting in very expensive costs. , it is difficult to obtain a large number of applications. The existing low-alloy ultra-high-strength steel has high strength comparable to maraging steel and secondary hardening steel, and the production process is relatively simple, and the production cost is also low, but the fly in the ointment is that its toughness is very low. To this ...

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): C22C38/02C22C38/04C22C38/44C22C38/48C22C38/46C21C7/06C21C7/10C21D8/06C22B9/18
CPCC21C7/06C21C7/10C21D8/065C22B9/18C22C38/005C22C38/02C22C38/04C22C38/34C22C38/44C22C38/46C22C38/48
Inventor 徐亚东王亚男牟雪萍郭敏王刚肖玉平
Owner 日照市质量检验检测研究院(国家碳素结构钢产品质量检验检测中心(山东)日照市药品不良反应监测中心日照市纺织纤维监测中心
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
Eureka Blog
Learn More
PatSnap group products