Carbon steel composition for reduced thermal strain steering rack bar and method for manufacturing the same
A steering rack and composition technology, applied to components with teeth, belts/chains/gears, portable lifting devices, etc., can solve problems such as increased manufacturing costs, thermal strains, and thermal strains of materials, and achieve manufacturing Time and manufacturing cost reduction, omission of manufacturing process, and effects of reducing thermal strain
Active Publication Date: 2016-10-26
HYUNDAI MOTOR CO LTD
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Problems solved by technology
[0010] In the related field, in the method of developing a high-strength material, the high-strength material developed in the related field has the following problems: due to the high degree of strengthening, the impact strength and workability are reduced, and thermal strain occurs
However, if heat treatment is performed before the cutting process, the process is difficult due to the high degree of strengthening of the material, and the material undergoes thermal strain, thus requiring additional corrections
Therefore, the manufacturing time increases, so the manufacturing efficiency decreases and the manufacturing cost increases
Method used
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[0040] The following description is merely exemplary in nature and is not intended to limit the present disclosure, application or use. It should be understood that throughout the drawings, corresponding reference numerals indicate like or corresponding parts and features.
[0041] Hereinafter, exemplary modes of a carbon steel composition for a thermal strain-reduced steering rack and a manufacturing method thereof of the present disclosure will be described in detail with reference to the accompanying drawings. Prior to this, the terms or expressions used in the specification and claims should not be construed as being limited to the ordinary or dictionary meanings, but should be based on the best way for the inventor to properly define the term concept to describe the present disclosure of his own The principles of the content are understood to have meanings and concepts consistent with the technical spirit of the present disclosure. Therefore, it should be understood that...
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The present disclosure provides a carbon steel composition for a reduced thermal strain steering rack bar and a method for manufacturing the carbon steel composition. The carbon steel composition for a steering rack bar includes: iron (Fe) as a main component, about 0.39 to 0.43 wt % of carbon (C), approximately 0.15 to 0.35 wt % of silicon (Si), approximately 0.90 to 1.10 wt % of manganese (Mn), approximately 0.02 to 0.04 wt % of niobium (Nb), and approximately 0.10 to 0.15 wt % of vanadium (V). The method for manufacturing a carbon steel composition for a steering rack bar includes: filling and drawing the carbon steel composition; broaching the filled and drawn carbon steel composition; performing nitriding heat-treatment on a surface of the broached carbon steel composition; and inspecting the nitriding heat-treated carbon steel composition.
Description
[0001] Cross References to Related Applications [0002] This application claims priority from Korean Patent Application No. 10-2015-0052528 filed Apr. 14, 2015, which is hereby incorporated by reference in its entirety. field of invention [0003] The present invention relates to a carbon steel composition for a steering rack bar with reduced thermal strain and a method of manufacturing the same. Background technique [0004] The statements in this section merely provide background information related to the present disclosure and may not constitute prior art. [0005] Recently, environmental problems have come to the fore on a global scale, and therefore, methods of reducing fuel have been sought to cope with this problem including all industries. In order to reduce fuel, examples of proposals in the field of the vehicle industry include improving the efficiency of a vehicle engine and reducing vehicle weight. This helps improve the fuel efficiency of the vehicle by redu...
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Login to View More IPC IPC(8): C22C38/04C22C38/12C22C38/18C22C38/06C23C8/00F16H55/26
CPCC22C38/04C22C38/06C22C38/12C22C38/18C23C8/00F16H55/26C21D6/002C21D6/005C21D6/008C22C38/02C22C38/24C22C38/26C23C8/26
Inventor 金铉奎
Owner HYUNDAI MOTOR CO LTD