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Production control method for low-alloy high-strength steel and galvanized strip steel

A production control method and low-alloy technology, applied in hot-dip plating process, metal material coating process, coating, etc., can solve the problems of reduced stamping and forming ability, no reprocessing, etc.

Inactive Publication Date: 2018-03-30
BEIJING SHOUGANG COLD ROLLED SHEET
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the prior art, when the cold-rolled low-alloy high-strength steel is subjected to a tensile test after annealing, there is a yield plateau on the stress-strain curve. This yield plateau often produces a slip line when it is reprocessed. That is, orange peel, which reduces the stamping ability and cannot be reprocessed

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  • Production control method for low-alloy high-strength steel and galvanized strip steel
  • Production control method for low-alloy high-strength steel and galvanized strip steel
  • Production control method for low-alloy high-strength steel and galvanized strip steel

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[0023] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0024] The embodiment of the present application provides a low-alloy high-strength steel. The chemical components contained in the low-alloy high-strength steel and the mass percentages of each chemical component are: carbon (C): 0.05-0.07%, silicon (Si): 0.03-0.06% , manganese (Mn): 0.3-0.5%, phosphorus (P): 0.02-0.03%, sulfur (S): 0-0.01%, all aluminum (Alt): 0.025-0.045%, niobium (Nb): 0.02-0.03 %, the rest is iron and impuriti...

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Abstract

The invention relates to the technical field of hot galvanizing, in particular to a production control method for low-alloy high-strength steel and galvanized strip steel. The low-alloy high-strengthsteel comprises the chemical ingredients of, in percentage by mass, 0.05-0.07% of carbon, 0.03-0.06% of silicon, 0.3-0.5% of manganese, 0.02-0.03% of phosphorus, 0-0.01% of sulphur, 0.025-0.045% of total aluminum, 0.02-0.03% of niobium and the balance iron and impurities. The yield strength level of the strip steel obtained by machining the low-alloy high-strength steel can reach 300 MPa or aboveby adjusting the chemical ingredients and the contents of all the chemical ingredients of the low-alloy high-strength steel; and meanwhile, the strength and the forming property of the strip steel arefurther improved, and remachining is facilitated.

Description

technical field [0001] The invention relates to the technical field of hot-dip galvanizing, in particular to a production control method of low-alloy high-strength steel and galvanized strip steel. Background technique [0002] With the vigorous development of the automobile manufacturing industry, the demand for steel sheets for automobiles is on the rise. At present, most of the parts used in domestic automobiles are formed by stamping. According to statistics, a car contains about 700 stamped parts. At the same time, automotive structural parts are developing in the direction of overall combination, that is, multiple parts are combined to simplify the assembly of the car body. Although the overall performance is good and its safety is improved, it has a greater impact on the formability of the steel plate. high demands. Therefore, steel and substrates for automobile bodies have developed from low-drawing low-carbon steel sheets in the past to high-deep drawing-grade in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/06C22C38/12C23C2/06C23C2/40C21D1/26C21D8/02
CPCC22C38/02C21D1/26C21D8/0226C21D8/0236C22C38/002C22C38/04C22C38/06C22C38/12C23C2/06C23C2/40
Inventor 程晓杰李振姚舜刘李斌柳智博史静陈瑾孙建华孙存友曾伟仔杨建新任君茹
Owner BEIJING SHOUGANG COLD ROLLED SHEET
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