Q355NE hot-rolled round steel for high-speed rail bogie and production process

A production process and bogie technology, applied in the field of iron and steel metallurgy, can solve the problems of unqualified steel strength and impact performance, and achieve the effect of ensuring the purity of steel and continuous casting

Pending Publication Date: 2022-03-08
BENGANG STEEL PLATES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the quality of any link is not guaranteed, it will seriously affect the strength and impact performance of the steel and fail to meet the requirements.

Method used

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  • Q355NE hot-rolled round steel for high-speed rail bogie and production process
  • Q355NE hot-rolled round steel for high-speed rail bogie and production process
  • Q355NE hot-rolled round steel for high-speed rail bogie and production process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0033] The chemical composition of Example 1-5 is shown in Table 2; the low-magnification structure of the product of Example 1-5 is shown in Table 3; the non-metallic inclusions of the product of Example 1-5 are shown in Table 4; the mechanical properties of the product of Example 1-5 are shown in Table 5; The impact properties of the products of Examples 1-5 are shown in Table 6.

[0034] The chemical composition (wt%) of each embodiment steel of table 2

[0035] element C Si mn Cr P S Ni V Mo Alt Cu CEV example 1 0.16 0.27 1.45 0.14 0.009 0.005 0.02 0.03 0.02 0.025 0.02 0.43 Example 2 0.15 0.23 1.42 0.12 0.010 0.002 0.01 0.02 0.01 0.020 0.01 0.41 Example 3 0.17 0.35 1.43 0.10 0.008 0.005 0.02 0.04 0.01 0.030 0.01 0.42 Example 4 0.14 0.30 1.48 0.06 0.005 0.003 0.01 0.05 0.02 0.035 0.02 0.44 Example 5 0.18 0.20 1.46 0.16 0.004 0.002 0.02 0.03 0.01 0.038 0.01 0.40 ...

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PUM

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Abstract

The invention provides Q355NE hot-rolled round steel for a high-speed rail bogie and a production process. The steel comprises the following chemical components in percentage by weight: 0.14%-0.18% of C, 0.17%-0.40% of Si, 1.41%-1.49% of Mn, 0.05%-0.18% of Cr, 0.02%-0.05% of V, less than or equal to 0.05% of Ni, less than or equal to 0.05% of Cu, less than or equal to 0.05% of Mo, 0.015%-0.040% of Als, less than or equal to 0.012% of P, less than or equal to 0.010% of S, less than or equal to 15 ppm of oxygen and the balance of iron and inevitable impurities. In order to reduce the normalizing cost, alloy addition is developed to replace normalizing treatment, the final structure and performance of a steel product can be improved through solid solution and precipitation of added alloy elements in the hot working process, the normalizing production procedures are reduced, and the production cost is reduced.

Description

technical field [0001] The invention relates to the technical field of iron and steel metallurgy, in particular to a Q355NE hot-rolled round steel for high-speed rail bogies and a production process. Background technique [0002] The high-speed rail bogie is a key component to ensure the safe and smooth operation of the train. With the continuous increase of train speed, the requirements for bogie performance are getting higher and higher. The steel Q355NE for high-speed railway bogies is required to withstand high-strength loads and low-temperature impact loads in a non-quenched and tempered state. The as-rolled steel Q355NE requires low-temperature impact properties of not less than 34J at -40°C, and has very high requirements for performance indicators such as yield strength and tensile strength. Therefore, in the production of steel Q355NE for high-speed rail bogies, the requirements for steel composition design, converter smelting, refining, and continuous casting are ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/06C22C38/20C22C38/22C22C38/24C22C38/42C22C38/44C22C38/46B22D11/111B22D11/115B22D11/16C21C7/06C21C7/10C22C33/04
CPCC22C38/02C22C38/04C22C38/24C22C38/20C22C38/22C22C38/06C22C38/46C22C38/42C22C38/44C22C33/04C21C7/06C21C7/0006B22D11/16B22D11/115B22D11/111C21C7/10
Inventor 张群卢秉军阚开
Owner BENGANG STEEL PLATES
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