High-carbon and low-alloy steel for grinding balls and manufacturing method thereof

A manufacturing method and low-alloy technology, which is applied in the field of metal smelting, can solve problems such as low production efficiency, high cost, and low content of wear-resistant alloys, and achieve the effects of increasing service life, enhancing hardness, and improving wear resistance

Inactive Publication Date: 2018-08-14
TIANJIN RONGCHENG UNITED IRON & STEEL GRP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

On the other hand, although high-alloy steel balls have good wear resistance, since most of the high-alloy ball milling steels are die-cast, the production efficiency is low and the cost is high, which cannot meet the m...

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  • High-carbon and low-alloy steel for grinding balls and manufacturing method thereof
  • High-carbon and low-alloy steel for grinding balls and manufacturing method thereof
  • High-carbon and low-alloy steel for grinding balls and manufacturing method thereof

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Embodiment Construction

[0039] The following is attached figure 1 The present invention is described in further detail.

[0040] A method for manufacturing steel for high-carbon and low-alloy grinding balls, comprising the following steps:

[0041] Step 1: In terms of mass percentage, 115t steel containing C0.73-0.83%, Si0.15-0.20%, Mn0.75-0.85%, Cr0.40-0.50%, P≤0.020%, S≤0.025% Add it into the converter for smelting, then add low nitrogen carbon powder, deoxidizer, silicomanganese, ferrosilicon, high carbon ferrochrome, titanium, copper, indium, gallium, nickel, zinc and tin into the converter in sequence, and the whole process is from the converter Argon is blown into the bottom of the furnace to control the oxygen pressure ≥ 0.8Mpa, and the end point of smelting is C ≥ 0.15%, P ≤ 0.015%. The amount added is 0.24% to 0.28% of the total weight of the materials charged into the converter;

[0042] Step 2: The molten steel tapped in Step 1 is transferred to the LF furnace for refining, and Ar is bl...

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Abstract

The invention discloses high-carbon and low-alloy steel for grinding balls. The steel comprises the following components, by mass percentage: 0.88-0.94% of C, 0.20-0.30% of Si, 0.90-1.00% of Mn, lessthan or equal to 0.025% of P, less than or equal to 0.025% of S, 0.50-0.60% of Cr, 0.010-0.050% of Ti, 0.20-0.30% of In, less than or equal to 0.25% of Cu, 0.080-0.100% of Ga, 0.20-0.26% of Ni, 0.10-0.14% of Zn, 0.14-0.16% of Sn and the balance Fe and inevitable impurities. The steel has the advantages that the production cost is relatively low, meanwhile, high-content carbon, manganese, tin, titanium and other elements are contained in the steel, so that the as-cast structure of the steel can be refined, and therefore the hardness of the grinding balls can be greatly improved, and good wear resistance of the grinding balls in the grinding process of an object with large hardness can be ensured; and in addition, high-content chromium is further contained in the steel, so that the grindingballs can also have relatively strong corrosion resistance, and therefore the grinding balls can be suitable for being used for grinding in a variety of fields.

Description

technical field [0001] The invention relates to the field of metal smelting, in particular to a steel for high-carbon and low-alloy grinding balls and a manufacturing method thereof. Background technique [0002] Wear-resistant steel is mainly used to manufacture various wear-resistant steel balls. Most of the traditional ball milling steels are carbon steel or high alloy steel. In recent years, with the rapid development of mining, construction, metallurgy, chemical industry, ceramics, energy, power plants and cement industries at home and abroad, the market demand for wear-resistant steel balls is increasing, and the working environment of steel balls is also increasing. The wear resistance of carbon steel balls can no longer meet the grinding requirements of the above industries. On the other hand, although high-alloy steel balls have good wear resistance, because most of the high-alloy ball milling steels are die-cast, the production efficiency is low and the cost is h...

Claims

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Application Information

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IPC IPC(8): C22C38/50C22C38/42C22C38/02C22C38/04C22C33/04C21C7/10C21C7/072C21C7/00
CPCC22C38/50C21C7/0056C21C7/072C21C7/10C22C33/04C22C38/002C22C38/008C22C38/02C22C38/04C22C38/42
Inventor 包石磊梁加银顾龙
Owner TIANJIN RONGCHENG UNITED IRON & STEEL GRP CO LTD
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