Production method of low carbon steel ball

A production method and low-carbon steel technology, applied in the manufacture of tools, abrasives, metal processing equipment, etc., can solve the problems of increasing the probability of steel shot breaking, reducing the impact resistance of steel shot, and reducing the service life, so as to shorten the processing time, Long service life and less internal defects

Inactive Publication Date: 2009-03-18
淄博大亚金属科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The carbon content of generally qualified high-carbon steel shot is required to be 0.8%-1.2%. Compared with low-carbon steel, the steel type of this material is subject to greater internal stress during heat treatment, especially quenching, and is prone to cracks, resulting in cracks in the steel shot. Reduced hit resistance
The low toughness of high carbon steel and partial quenching cracks increase the chance of breaking the steel shot, thus reducing the service life

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The production method is:

[0034] Smelting: Use ordinary steel raw materials. Melting in an electric arc furnace, melting temperature: 1590°C, decarburization by blowing oxygen during the smelting process, the carbon content is controlled within 0.30%, the high temperature oxidation time is prolonged, and the molten steel is purified to the maximum extent by boiling the molten steel;

[0035] Add silicon, manganese and other alloy materials to increase their content;

[0036] Remove the content of harmful elements such as sulfur and phosphorus;

[0037] The controlled chemical composition is (% by weight), carbon 0.22%, manganese 0.86%, silicon 0.25%, sulfur 0.025%, phosphorus 0.027%, and the rest is iron;

[0038] Granulation: The molten steel smelted with the above ingredients is poured on a high-speed rotating centrifugal device through a ladle. After being immersed in water, it is shaped to form a steel shot whose internal structure is bainite.

[0039] Drying:...

Embodiment 2

[0054] The production method is:

[0055] Smelting: Use ordinary steel raw materials. Smelting in an electric arc furnace, melting temperature: 1570°C, decarburization by blowing oxygen during the smelting process, the carbon content is controlled within 0.30%, the high temperature oxidation time is prolonged, and the molten steel is purified to the maximum extent by boiling the molten steel;

[0056] Add alloy materials such as silicon and manganese to increase the content of alloy elements;

[0057]Remove the content of harmful elements such as sulfur and phosphorus;

[0058] The controlled chemical composition is (% by weight), carbon 0.15%, manganese 0.96%, silicon 0.15%, sulfur 0.035%, phosphorus 0.032%, and the rest is iron;

[0059] Granulation: The molten steel smelted with the above ingredients is poured on a high-speed rotating centrifugal device through a ladle. After being immersed in water, it is shaped to form a steel shot whose internal structure is bainite. ...

Embodiment 3

[0067] The production method is:

[0068] Melting: use raw materials with low carbon content, smelting in induction furnace, smelting temperature: 1630 ℃, adjust the composition during the smelting process to ensure that the carbon content meets the standard of low-carbon steel, and obtain molten steel made of low-carbon steel;

[0069] The chemical composition is (weight %), carbon 0.20%, manganese 0.82%, silicon 0.26%, sulfur 0.031%, phosphorus 0.034%, and the rest is iron.

[0070] Granulation: Atomization forming, pouring the molten steel on the high-pressure sprayed water according to a certain flow rate, using the impact force of the high-pressure water to punch the molten steel into small droplets, the steel droplets gradually shrink, and form after falling into the water. : 2.4 kg, molten steel flow: 12.5 kg / s.

[0071] Drying: The formed steel shot is sucked up from the pool and put into a resistance type drying furnace for drying.

[0072] Screening: vibration scre...

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PUM

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Abstract

The invention relates to a method for manufacturing a mild steel shot, which belongs to the field of metallic abrasive materials, and is mainly applied to the boatbuilding industry, the container industry, the casting industry, the machine building industry, the vehicle aviation industry and so on. The method is characterized in that: firstly, the chemical compositions in weight percentage of the mild steel shot are 0.10 to 0.30 percent of carbon, 0.60 to 1.20 percent of manganese, 0.1 to 0.50 percent of silicon, less than or equal to 0.05 percent of sulfur, less than or equal to 0.05 percent of phosphor, and the balance being iron; and secondly, the manufacturing method comprises the following steps of smelting, granulating, drying, sieving and packing. The mild steel shot has small internal defects, high obdurability, strong impact resistance, long service life which is more than 20 percent higher than that of a common steel shot, reduced consumption of the steel shot, reduced use cost, quick cleaning speed, good elasticity, difficult breakage, and low environmental pollution. By utilization of the mild steel shot, the work efficiency is improved; the consumption is reduced; the economic benefit obtained is improved; and more than 30 percent of cost can be reduced.

Description

technical field [0001] The invention discloses a method for making low-carbon steel shots, which belongs to the field of metal abrasives. Low-carbon steel shot is a special metal abrasive, which is characterized by low carbon content and a more impact-resistant metallographic structure, so it has excellent comprehensive mechanical properties and a much longer service life than ordinary steel shots. It is used in a wide range of fields, such as shipbuilding, foundry, container industry and other steel industries. It can especially replace high-carbon steel shot and stainless steel shot, and is used in automobile manufacturing, casting, steel plate pretreatment, stainless steel plate descaling treatment, etc. Background technique [0002] General abrasives are divided into metal abrasives and non-metallic abrasives. At present, the application field of metal abrasives is gradually expanding, and some fields have replaced non-metallic abrasives. The most common and widely used ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/60C22C38/04B24C11/00B22F9/08B22F9/10
Inventor 韩庆吉
Owner 淄博大亚金属科技股份有限公司
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