X65 steel plate for pipe fittings and production method thereof

A technology of X65 and steel plates, which is applied in the field of X65 steel plates for pipe fittings and its production, can solve the problems of difficult production, long production cycle and high cost

Inactive Publication Date: 2012-02-08
NANYANG HANYE SPECIAL STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the production of the known X65 grade steel plate is difficult, the production cycle is long, and it is difficult for enterprises with poor equipment level to produce low-cost and high-quality pipeline steel
As steel X65 for pipe fittings, because the requirements of the technical agreement are slightly lower than those of pipeline steel, the production difficulty is slightly lower, but the amount of alloy added in the production of this type of steel plate by domestic steel is large, and the cost is high

Method used

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  • X65 steel plate for pipe fittings and production method thereof
  • X65 steel plate for pipe fittings and production method thereof
  • X65 steel plate for pipe fittings and production method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Through KR molten iron pretreatment, converter smelting, LF refining, VD vacuum refining, continuous casting, heating, rolling, controlled cooling, and slow cooling processes, the finished steel X65 steel plate for pipe fittings with the chemical composition described in Table 1 below is obtained, wherein The mechanical and mechanical properties of X65 steel plates for pipe fittings are shown in Table 3 below.

[0034] Table 1 Chemical Composition of Steel in Example 1

[0035]

Embodiment 2

[0037] Through KR hot metal pretreatment, converter smelting, LF refining, VD vacuum refining, continuous casting, heating, rolling, controlled cooling, and slow cooling processes, the finished steel X65 steel plate for pipe fittings with the chemical composition described in Table 2 below is obtained, wherein The mechanical and mechanical properties of X65 steel plates for pipe fittings are shown in Table 3 below.

[0038] Table 2 Chemical Composition of Steel in Example 2

[0039]

[0040] The process route of the present invention: KR molten iron pretreatment→converter smelting→LF refining→VD vacuum smelting→continuous casting machine pouring→slab slow cooling→slab heating→slab dephosphorization→TMCP rolling→controlled cooling→steel plate straightening→stacking Pile slow cooling→surface inspection→finishing→flaw detection→performance inspection→qualified product storage.

[0041]Steelmaking composition: Since the steel plate requires high yield strength, it is difficult...

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PUM

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Abstract

The invention discloses an X65 steel plate for pipe fittings. The steel plate comprises the following chemical components by weight percent: 0.04-0.12% of C, 0.20-0.40% of Si, 1.30-1.65% of Mn, 0.010% or less of P, 0.005% or less of S, 0.40 or less of microalloying elements (V, Nb, Ti, Mo and Ni), 0.050% or less of Als and the balance of Fe and residual elements. The production method comprises a series of technologies, namely KR molten iron pretreatment, converter smelting, ladle furnace (LF) refining, vapor deposition (VD) vacuum refining, continuous casting, heating, rolling, controlled cooling and slow cooling. By reasonably adopting the low carbon and low manganese chemical component design of multiple composite microalloy elements and the LF and VD technologies, the cleanliness of the steel can be ensured and the total grade of various inclusions is no more than 3.0; and by controlling rolling and controlling cold treatment, the grain size of the steel reaches the grade 11-12. By effectively applying the measures, the X65 steel plate for 16-25 mm pipe fittings can be produced successfully.

Description

technical field [0001] The invention belongs to the technical field of steel plate production, and in particular relates to a steel X65 steel plate for pipe fittings and a production method thereof. Background technique [0002] High-quality pipeline steel has always been a "bottleneck" in the development of my country's metallurgical industry. At present, the production of the known X65 steel plate is difficult and the production cycle is long, and it is difficult for enterprises with poor equipment level to produce low-cost and high-quality pipeline steel. As steel X65 for pipe fittings, because the requirements of the technical agreement are slightly lower than those of pipeline steel, the production difficulty is slightly lower. However, the amount of alloy added in the production of this type of steel plate by domestic steel materials is large, and the cost is high. Contents of the invention [0003] In view of the above problems, the present invention provides a low...

Claims

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Application Information

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IPC IPC(8): C22C38/14C22C38/12C22C38/08
Inventor 朱书成于飒许少普张立新崔冠军高照海李忠波袁永旗李亮亮赵迪刘庆波贾涛张强
Owner NANYANG HANYE SPECIAL STEEL CO LTD
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