Wire rod excellent in drawing processability and method for producing the same

A technology of stretching processability and wire rod, applied in the field of wire rod and its manufacturing, can solve the problems of stretching processability that have not been clearly disclosed, and achieve the effect of excellent stretching processability

Active Publication Date: 2019-12-20
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 effect of the number or size of such hard inclusions on drawability and the optimum alloy composition to ensure cleanliness and drawability are not clearly disclosed

Method used

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  • Wire rod excellent in drawing processability and method for producing the same
  • Wire rod excellent in drawing processability and method for producing the same
  • Wire rod excellent in drawing processability and method for producing the same

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Embodiment Construction

[0029] Hereinafter, preferred embodiments of the present invention will be described. However, the embodiments of the present invention can be modified in various ways, and the scope of the present invention is not limited to the embodiments described below. In addition, the embodiments of the present invention are provided to more completely explain the present invention to those skilled in the art to which the present invention pertains.

[0030] The inventors understood that suppression of inclusions is required to improve drawing workability, but the effect of the number or size of inclusions on drawing workability is not clearly disclosed, and the optimal alloy composition for ensuring cleanliness and drawing workability It has not been clearly disclosed either, and therefore intensive research has been conducted to solve the above-mentioned problems.

[0031] Finally, it was confirmed that the Al existing in the spring steel 2 o 3 , TiN and other hard inclusions are c...

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Abstract

An aspect of the present invention relates to a wire rod excellent in drawability comprising, in terms of% by weight, 0.4 to 0.7% of C, 1.2 to 2.3% of Si, 0.1% to 1.0% of Mn, Cr: 0.1 to 1.0%, Al: 0.01% or less, Ti: 0.01% or less, N: 0.001 to 0.007% and balance Fe and unavoidable impurities. The present wire cord satisfies the following relation 1; the amount of impurities present is 1050 pieces / mm2 or less, the proportion of impurities containing Al2O3 is 28% or less and the proportion of impurities containing TiN is 15% or less; the formula is 0.002 <= 0.67Al + 0.5Ti <= 0.011, wherein the symbol of each element in the formula 1 is a weight value % indicating the content of each element.

Description

technical field [0001] The present invention relates to a wire rod excellent in drawability and a method for producing the same. Background technique [0002] The springs used in automobiles mainly include springs for clutches, engines, fuel injection devices, etc. (hereinafter referred to as "engine valve springs"), or suspension springs for suspension devices that ease the impact transmitted by the road surface. [0003] Generally speaking, in the manufacturing process of engine valve springs or suspension springs, it is necessary to undergo a stretching process that changes the diameter of the raw material, that is, the wire, into the wire diameter of the final spring product. The stretching process occupies a very important role in the spring manufacturing process. Partly, therefore, various attempts have been made to improve drawing processability. [0004] For example, according to the description in Patent Document 1, in the overall structure, the area ratio occupied...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/34C22C38/06C22C38/18C22C38/28C22C38/24C22C38/22C22C38/20C22C38/50C22C38/44C22C38/46C22C38/42C22C38/40F16F1/02
CPCC21D8/06C21D9/525C22C38/001C22C38/02C22C38/20C22C38/22C22C38/24C22C38/28C22C38/44C22C38/46C22C38/50
Inventor 金宽镐郑会荣金汉辉
Owner 浦项股份有限公司
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