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Precipitation hardening steel plate with small material deviation in all directions and manufacturing method thereof

A technology for precipitation hardening and steel plates, which is applied in the field of precipitation hardening steel plates and its manufacturing, which can solve the problems of poor processability, uneven distribution, poor material uniformity, etc., and achieve the effect of less material deviation

Pending Publication Date: 2019-07-19
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, these technologies have the advantage of excellent yield ratio due to the presence of fine precipitates in the steel, but have the disadvantage of poor workability due to uneven distribution of these fine precipitates and poor material uniformity in all directions.

Method used

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  • Precipitation hardening steel plate with small material deviation in all directions and manufacturing method thereof
  • Precipitation hardening steel plate with small material deviation in all directions and manufacturing method thereof
  • Precipitation hardening steel plate with small material deviation in all directions and manufacturing method thereof

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Embodiment Construction

[0020] Next, a precipitation hardened steel sheet with less material variation in each direction according to one aspect of the present invention will be described in detail.

[0021] First, the alloy components and preferred content ranges of the precipitation-hardened steel sheet will be described in detail. Unless otherwise specified, the content of each component described later is based on weight.

[0022] C: 0.06 to 0.15%

[0023] Carbon is a precipitate-forming element and contributes to improving the strength of steel. When the content of carbon is too low, it is difficult to ensure an appropriate level of pearlite (pearlite) required for grain boundary strengthening, so that there is a possibility that the hole expandability will be deteriorated, and sufficient fine Ti-based precipitates cannot be obtained, so that Possibility of reduction in strength and yield ratio. On the other hand, when the content of carbon is too high, inclusion segregation bands are formed ...

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Abstract

The invention discloses a precipitation hardening steel plate and a manufacturing method of the precipitation hardening steel plate. The steel plate comprises, by weight, 0.06-0.15% of C, 1.5% or less(except 0%) of Mn, 0.002-0.03% of P, 0.01% or less of S, 0. 01% or less of N, 0.3% or less of Si, 0.01-0.06% of acid-soluble Al, 0.03-0.1% of Ti and the balance Fe and inevitable impurities. The precipitation hardening type steel plate has less material deviation in all directions, thereby being preferably used for structural parts such as components for automobiles and the like.

Description

technical field [0001] The present invention relates to a precipitation-hardened steel sheet and a method for producing the same, and more particularly, to a precipitation-hardened steel sheet that can be preferably used in structural parts such as automotive components with less variation in material in each direction and a method for manufacturing the same. Background technique [0002] In order to improve the impact resistance of the car body due to the tightening of regulations on the impact stability of automobiles, precipitation hardened steel sheets are widely used in structural parts such as members, beams, and pillars. [0003] The precipitation hardening method utilizes the phenomenon that a large number of fine precipitates are formed during cooling after solution heat treatment at a high temperature, and are strengthened by the stress field around the precipitates. The yield strength (YS) of the tensile strength (Tensile Strength, TS) is high, that is, the yield ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/04C22C38/02C22C38/06C22C38/14C21D8/02
CPCC22C38/04C22C38/02C22C38/06C22C38/002C22C38/001C22C38/14C21D8/0205C21D8/0236C21D8/0273C21D2211/005C21D2211/009
Inventor 韩箱浩
Owner 浦项股份有限公司
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