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Method for processing high-strength high-ductility reinforcing steel bars special for high speed railway

A high-speed railway and steel bar processing technology, applied in the field of steel bar processing, to achieve the effect of high strength and high elongation

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

AI Technical Summary

Problems solved by technology

For such a high train running speed, firstly, the track construction needs to be innovated to adapt to the safe operation of high-speed trains. According to the construction of high-speed railways in Germany and Japan, high-speed railways all use ballastless roadbed and prestressed concrete sleeper slabs, and the main reinforcement of the sleeper slabs is uniform. Using large-scale, high-strength prestressed steel bars, there is no such product in China at present

Method used

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  • Method for processing high-strength high-ductility reinforcing steel bars special for high speed railway

Examples

Experimental program
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Effect test

Embodiment 1

[0028] This embodiment proposes a special high-strength and high-plastic steel bar for high-speed railways. The structure is shown in 1. Each steel bar is 5m long, including a steel bar body 1 and thread teeth 2 on the surface of both ends of the steel bar body. The thread teeth 2 are at the ends of the steel bar body. The surface is continuously distributed within the range of 50mm. The width of the thread tooth 2 is 3mm, the height is 0.5mm, and the tip of the thread tooth has a 5° arc transition.

[0029] 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 impurities, wherein the compound rare earth contains the following components by weight percentage: La: 33%, Ce: 11%, Y: 10%, Sc: 1...

Embodiment 2

[0035]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%.

[0036] The processing method of high-strength and high-plasticity steel bars for high-speed railways is carried out according to the following steps:

[0037] ⑴ Send the smelted steel bar into the heating furna...

Embodiment 3

[0041] 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%.

[0042] The processing method of high-strength and high-plasticity steel bars for high-speed railways is carried out according to the following steps:

[0043] ⑴Send the smelted steel bar into the heating fu...

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Abstract

The invention relates to a method for processing reinforcing steel bars, in particular to a method for processing high-strength high-ductility reinforcing steel bars special for a high speed railway. The smelted reinforcing steel bars are processed according to the following steps of acid pickling and parkerising, drawing, hot rolling and rib engraving, primary heat treatment, winding up, threaded tooth rolling, secondary heat treatment and packing and storage. The online continuous air cooling and quenching process technology is adopted, the strength grade of products can be 900 Mpa to 1450 Mpa, the elongation is larger than 15 percent, the strength and bending ratio is larger than 1.15, the relaxation rate of 1000 h is smaller than 2.5 percent, and the elongation and strength are high.

Description

technical field [0001] The invention relates to a steel bar processing method, in particular to a special high-strength and high-plasticity steel bar processing method 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 countrie...

Claims

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Application Information

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IPC IPC(8): B23P15/20E04C5/03
CPCB21C37/045B21H3/04B21H3/12C21D9/525E04C5/03
Inventor 姚圣法吴海洋
Owner 江苏盛大金属制品有限公司
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