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Hot-rolled steel sheet for hot press forming with small material variation and excellent formability and corrosion resistance, molded article using the same, and manufacturing method thereof

A technology of hot-rolled steel sheets and hot-press forming, which is applied in the field of hot-press formed products and hot-rolled steel sheets for hot-press forming, which can solve problems such as poor processing and non-disclosure, and achieve small material deviation, excellent formability and corrosion resistance Effect

Active Publication Date: 2018-01-30
浦项股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the technique relates to a thermoformed product obtained by thermoforming a cold-rolled or hot-rolled steel sheet obtained through an existing rolling process, wherein There is no disclosure of any treatment process for reducing material variation in the width direction or length direction of the steel plate before hot press forming, and therefore, it is considered that problems such as poor processing frequently occur when steering components are manufactured according to the above-mentioned technology

Method used

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  • Hot-rolled steel sheet for hot press forming with small material variation and excellent formability and corrosion resistance, molded article using the same, and manufacturing method thereof
  • Hot-rolled steel sheet for hot press forming with small material variation and excellent formability and corrosion resistance, molded article using the same, and manufacturing method thereof
  • Hot-rolled steel sheet for hot press forming with small material variation and excellent formability and corrosion resistance, molded article using the same, and manufacturing method thereof

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Embodiment Construction

[0036] Next, a hot-rolled steel sheet for hot press forming, which is an aspect of the present invention with little material variation and excellent formability and corrosion resistance, will be described in detail.

[0037] Carbon (C): 0.2 to 0.3% by weight

[0038] Carbon is an element used to form carbides in steel or solid-solve in ferrite to increase the strength of hot-rolled steel sheets. In order to obtain such an effect in the present invention, the carbon is preferably contained in an amount of 0.2% by weight or more, more preferably in an amount of 0.24% by weight or more. However, when the carbon content is too much, a very hard (hard) structure will be formed on the surface of the cast sheet or strip during the continuous casting and rolling process, resulting in surface cracks, or the yield strength of the hot-rolled steel plate may be affected. And the tensile strength is too high, so that when the tube is formed by using multi roll (multi roll) at room temper...

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Abstract

The invention discloses a hot rolled steel sheet for hot press forming having low deviation of mechanical property and excellent formability and corrosion resistance hot pressed part using the same and method for manufacturing thereof. On one hand, the invention provides a hot rolled steel for hot press forming. The hot rolled steel contains by weight percentage:0.2-0.3% of C, 1.2-1.8%of Mn, 0.01-0.5% of Si, less than 0.015% of P, less than 0.004% of S, 0.001-0.05% of A1, 0.006-0.02% of N, 0.0001-0.005% of B, less than 0.1% of Cr and less than 0.05% of Mo, a total of 0.060-1% of more than one selected from Cu and Ni, a total of 0.025-0.09% of more than one selected from Ti and Nb, and Fe containing a residual amount and unavoidable foreign affairs.

Description

technical field [0001] The invention relates to a material with small deviation and good formability A hot-rolled steel sheet for hot-press forming excellent in corrosion resistance, a hot-press-formed product using the same, and a method for producing the same. Background technique [0002] In recent years, in order to improve the fuel consumption efficiency and fuel efficiency of automobiles, the strengthening of automobile structural parts is being accelerated, and the multifunctionalization of said automobile structural parts is also being accelerated in order to meet the various characteristics required by each part. . [0003] Especially for automobile steering parts, not only excellent strength but also excellent fatigue resistance and corrosion resistance are required, and hot-rolled steel sheets are generally used as steel sheets for automobile steering parts. In addition, such a steering member is made into a tubular shape, and various forming processes and heat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/04C22C38/02C22C38/06C22C38/12C22C38/08C22C38/16C22C38/14C21D8/02
CPCC21D8/0226C21D2211/001C21D2211/005C21D2211/008C21D2211/009C22C38/001C22C38/02C22C38/04C22C38/06C22C38/08C22C38/12C22C38/14C22C38/16C22C38/32C21D8/0263C22C38/18
Inventor 成焕球裵成范
Owner 浦项股份有限公司
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