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

Special high-strength and high-plasticity reinforcing steel bars for high speed railways

A high-speed railway, high-strength technology, applied in the field of high-strength steel bars, to achieve the effects of reducing loss force, uniform splitting force without direction, and high tensile strength

Inactive Publication Date: 2014-07-23
江苏盛大金属制品有限公司
View PDF2 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the construction of high-speed railways in Germany and Japan, ballastless subgrades and prestressed concrete sleeper slabs are used in high-speed railways, and the main reinforcement of the sleeper slabs is made of large-scale, high-strength prestressed steel bars. At present, there is no such product in China.

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
  • Special high-strength and high-plasticity reinforcing steel bars for high speed railways

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] This embodiment proposes a special high-strength and high-plasticity steel bar for high-speed railways. The structure is as shown in 1. Each steel bar is 5m long and includes a steel bar body 1 and thread teeth 2 on the two ends of the steel bar body. A continuous spiral rib 3, the angle α formed by the two tangent lines between the two sides of the continuous spiral rib and the surface of the steel bar is 92°; the thread teeth are continuously distributed within 50mm of the end surface of the steel bar body, and the width of the thread teeth The width of the continuous spiral rib is 3mm and the height is 0.6mm.

[0017] The high-strength and high-plastic steel bars for high-speed railways in this embodiment comprise the following components by weight percentage: C: 0.35%, Si: 0.5%, Mn: 1.5%, Nb: 0.04%, Cr: 0.08%, V: 0.02%, B: 0.001%, Mo: 0.004%, Al: 0.01%, P: 0.02%, S: 0.015%, Ti: 0.0085%, Ni: 0.0035%, composite rare earth: 6%, and the balance is Fe and Other impuriti...

Embodiment 2

[0023]This embodiment proposes a special high-strength and high-plasticity steel bar for high-speed railways. The structure is the same as that of Example 1. The difference lies in the components and processing methods of the high-strength and high-plasticity steel bars for high-speed railways in this embodiment. The steel in this embodiment is calculated by weight. The percentage contains the following components: C: 0.55%, Si: 0.9%, Mn: 1.7%, Nb: 0.05%, Cr: 0.09%, V: 0.04%, B: 0.003%, Mo: 0.007%, Al: 0.02% , P: 0.035%, S: 0.035%, Ti: 0.01%, Ni: 0.005%, compound rare earth: 7%, the balance is Fe and other impurities, and the compound rare earth contains the following components by weight percentage: La: 35% , Ce: 12%, Y: 9%, Sc: 14%, Gd: 3%, Sm: 6%, Dy: 2%, Pr: 19%.

[0024] The processing method of high-strength and high-plasticity steel bars for high-speed railways is carried out according to the following steps:

[0025] ⑴ Send the smelted steel bar into the heating furna...

Embodiment 3

[0029] This embodiment proposes a special high-strength and high-plasticity steel bar for high-speed railways. The structure is the same as that of Example 1. The difference lies in the components and processing methods of the high-strength and high-plasticity steel bars for high-speed railways in this embodiment. The steel in this embodiment is calculated by weight. The percentage contains the following components: C: 0.35%, Si: 0.5%, Mn: 1.5%, Nb: 0.04%, Cr: 0.08%, V: 0.02%, B: 0.001%, Mo: 0.004%, Al: 0.01%%, P: 0.02%, S: 0.015%, Ti: 0.0085%, Ni: 0.0035%, compound rare earth: 6%, the balance is Fe and other impurities, and the compound rare earth contains the following components by weight percentage: La : 33%, Ce: 11%, Y: 10%, Sc: 15%, Gd: 5%, Sm: 7%, Dy: 2%, Pr: 17%.

[0030] The processing method of high-strength and high-plasticity steel bars for high-speed railways is carried out according to the following steps:

[0031] ⑴ Send the smelted steel bar into the heating f...

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
Yield strengthaaaaaaaaaa
Login to View More

Abstract

The invention relates to special high-strength and high-plasticity reinforcing steel bars for high speed railways. Each reinforcing steel bar is 2-6m long, and comprises a reinforcing steel bar body and threads on the surfaces of two ends of the reinforcing steel bar body, wherein the threads are continuously distributed on the surfaces of the ends of the reinforcing steel bar body within a range of 45-55mm; the threads are 3mm wide and 0.4-0.6mm high, and tips of the threads are in arc transition by 2-5 degrees; the steel material comprises the following components in percentage by weight: 0.35-0.55% of C, 0.5-0.9% of Si, 1.5-1.7% of Mn, 0.04-0.05% of Nb, 0.08-0.09% of Cr, 0.02-0.04% of V, 0.001-0.003% of B, 0.004-0.007% of Mo, 0.01-0.02% of Al, 0.02-0.035% of P, 0.015-0.035% of S, 0.0085-0.01% of Ti, 0.0035-0.005% of Ni, 6-7% of compound rare earth, and the balance of Fe and other impurities. According to the steel material disclosed by the invention, the tensile strength is no less than 910Mpa, the yield strength is no less than 830Mpa, the elongation is no less than 15% and the 1000h relaxation rate is less than 2.5%.

Description

technical field [0001] The invention relates to a high-strength steel bar, in particular to a special high-strength and high-plasticity steel bar for high-speed railways. Background technique [0002] With the development of global industrialization, it is necessary to reduce the weight of engineering structures and equipment to improve their economy and safety. Therefore, it is urgently required that the strength of steel should be greatly improved under the premise of ensuring sufficient toughness. Since the mid-1990s, Japan, China, and South Korea have successively launched national research and development projects to improve the strength of steel. [0003] Although the promotion and application of high-strength steel bars in China has made great progress in recent years, there is still a big gap compared with foreign developed countries. In the United States, Britain, Japan, Germany, Russia and other European, American and Southeast Asian countries, steel bars above gr...

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): C22C38/58
Inventor 姚圣法吴海洋
Owner 江苏盛大金属制品有限公司
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