Shot ball having excellent strength and wear resistance and method for manufacturing same

a technology of strength and wear resistance and shot ball, which is applied in the field of shot ball, can solve the problems of damage to the shot ball, insufficient surface modification effect of the shot ball, and defects such as scratches or dents on the surface of products, and achieves excellent strength and wear resistance, easy to be broken, and improves strength and wear resistance.

Inactive Publication Date: 2020-03-19
POHANG IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The shot ball in this patent has a unique structure that doesn't change its shape when it cools down. This results in a strong and durable product that is resistant to breaking. Additionally, repeated use of the shot ball can further improve its strength and durability through a process called work hardening.

Problems solved by technology

However, the shot ball is damaged when used for a long time.
In this case, the shot ball does not sufficiently show the effect of surface modification, and makes defects such as scratches or dents on the surfaces of products.

Method used

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  • Shot ball having excellent strength and wear resistance and method for manufacturing same
  • Shot ball having excellent strength and wear resistance and method for manufacturing same

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Embodiment Construction

[0015]Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. The following embodiments are provided to sufficiently transfer the technical concepts of the disclosure to one of ordinary skill in the art. However, the disclosure is not limited to these embodiments, and may be embodied in another form. In the drawings, parts that are irrelevant to the descriptions may be not shown in order to clarify the disclosure, and also, for easy understanding, the widths, lengths, thicknesses, etc. of components are more or less exaggeratedly shown. Like numbers refer to like elements throughout this specification.

[0016]A shot ball having excellent strength and wear resistance, according to an embodiment of the present disclosure, may include, by weight %, 0.09% to 1.3% of carbon (C), 3% to 29% of manganese (Mn), 0.05% or less of phosphorus (P), 0.05% or less of sulfur (S), 1.0% to 8.0% of chromium (Cr), 10% or less (excluding 0...

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Abstract

Disclosed is a shot ball having excellent strength and wear resistance. The shot ball according to an embodiment of the present disclosure includes, by weight %, 0.09% to 1.3% of carbon (C), 3% to 29% of manganese (Mn), 1.0% to 8.0% of chrome (Cr), 0.05% or less of phosphorus (P), 0.05% or less of sulfur (S), 10% or less (excluding 0) of nickel (Ni), 7% or less (excluding 0) of molybdenum (Mo), 10% or less (excluding 0) of tungsten (W), the remainder iron (Fe), and other unavoidable impurities.

Description

TECHNICAL FIELD[0001]The present disclosure relates to a shot ball and a manufacturing method thereof, and more particularly, to a shot ball used in a shot blaster for surface modification and a method of manufacturing the shot ball.BACKGROUND ART[0002]A shot blasting process used for surface modification is a method for finishing the surfaces of strips cleanly by injecting a shot ball stored in a hopper at high pressure onto the strips so that the shot ball injected at high pressure collides with the strips to remove a scale, rust, coating, etc. existing on the surfaces of the strips by a mechanical force. The shot blasting process requires a shorter working time than a sand blasting process using sand.[0003]For this purpose, a shot ball is manufactured using a material such as cast iron and stainless steel. Particularly, in order to improve wear resistance, a shot ball is generally made of a hard structure.[0004]However, the shot ball is damaged when used for a long time. In this ...

Claims

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Application Information

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IPC IPC(8): C22C38/38C22C38/44C21D9/36B22F1/065
CPCC21D9/36C22C38/44C22C38/38C21D1/667C21D9/46C22C38/002C22C38/58B22F1/065
InventorLEE, SANG-CHULHAN, IL WOOKLEE, BONG KEUNLEE, DONG-RYEOLKIM, GEUG
OwnerPOHANG IRON & STEEL CO LTD