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High-strength steel with high minimum yield limit and method for producing such steel

A high-strength steel and yield strength technology, applied in the field of high-strength steel, can solve problems such as meeting requirements and improving steel performance

Inactive Publication Date: 2020-02-07
THYSSENKRUPP STEEL EURO AG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, the steels described in the prior art cannot satisfy the requirements in all respects and there is a need to improve the properties of the steel

Method used

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  • High-strength steel with high minimum yield limit and method for producing such steel
  • High-strength steel with high minimum yield limit and method for producing such steel
  • High-strength steel with high minimum yield limit and method for producing such steel

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Embodiment Construction

[0181] The invention is explained below with the aid of examples.

[0182] A total of six molten steels were produced in the laboratory and actual operation tests of the system, and their chemical compositions are shown in Table 1. Additionally, calculate the carbon equivalent CET, Pcm and Ceq of these molten steels. Liquid steels A, B, C, D and E were produced in the laboratory, and molten steel F was tested in operation. Molten steels A, B, C and D are molten steels taken together as comparative examples. Only molten steels E and F relate to flat steel products according to the invention. All molten steel is cast into slabs, which are then heated to the slab temperature according to Table 2 at a heating rate of 4 K / min, descaled with 200 bar water before rolling and then with 10-50% pass The secondary reduction e and the total deformation ev between 81 and 98% are rolled into flat steel products. After rolling, the flat steel products are cooled in the air or in stacks. ...

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PUM

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Abstract

The present invention relates to a high-strength steel having a minimum yield limit of 1300 MPa, a production method for such steel and applications of such steel.

Description

technical field [0001] The present invention relates to a high-strength steel having a high minimum yield limit; and a production method for such steel and the use of such steel. Background technique [0002] In the fields of civil engineering, general machinery manufacturing, electronic technology, etc., steels or alloys with special combinations of mechanical properties and chemical corrosion properties are required. It should generally have a combination of high yield limit, good toughness, high fatigue strength, high corrosion resistance and high wear resistance. [0003] In crane and mobile crane manufacturing, steels with a minimum yield limit of up to 1100 MPa are generally used at this stage. The continuous development of high-strength fine-grained structural steels has revolutionized the field of mobile crane construction by reducing operating weight while increasing load-carrying capacity. Advances in mobile crane construction technology increasingly require high...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D8/02C21D9/46C21D1/18C22C38/00C22C38/12C22C38/44C22C38/46C22C38/48C22C38/50C22C38/54C22C38/02C22C38/04C22C38/06C22C38/42
CPCC21D8/0226C21D8/0263C22C38/001C22C38/002C22C38/02C22C38/04C22C38/06C22C38/42C22C38/44C22C38/46C22C38/48C22C38/50C22C38/54C21D2211/008C21D9/46C21D1/18C21D6/004C21D6/005C21D6/008C21D8/0205
Inventor 海因茨-沃纳·布伦斯亚历山大·比约恩·容格曼安德列亚斯·克恩汉斯-约阿希姆·切尔西希
Owner THYSSENKRUPP STEEL EURO AG