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High-carbon low-alloy wear-resistant ball steel and production process thereof

A production process and low-alloy technology, applied in the field of high-carbon low-alloy wear-resistant ball steel and its production process, can solve the problems of low production efficiency, high cost, low wear-resistant alloy content, etc., and achieve low production cost, The effect of low cost and uniform steel quality

Active Publication Date: 2014-04-16
ZENITH STEEL GROUP CORP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 market demand at all. Therefore, it is urgent to develop a product with better wear resistance than Carbon steel ball with low alloy content, a new type of high wear-resistant steel ball suitable for industrial mass production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A high-carbon low-alloy wear-resistant ball steel, its chemical composition weight percentage (wt%) is: C 0.99%, Si 0.24%, Mn 1.04%, Cr 0.54%, Ni 0.02%, Mo 0.02%, Al 0.032 %, S 0.002%, P 0.013%, Cu 0.04%, and the remainder is Fe.

[0029] The production process of the above-mentioned high-carbon low-alloy wear-resistant ball steel is as follows:

[0030] (1) Electric furnace smelting, smelting in a 90-ton electric furnace, adding molten iron and scrap steel, and adding ferrochrome and ferromanganese to the ladle when tapping, to achieve pre-removal of P and initial adjustment of components;

[0031] (2) LF refining, S removal and composition fine-tuning in a 100-ton LF furnace;

[0032] (3) VD vacuum furnace, vacuum degassing and composition fine-tuning in a 100-ton VD furnace;

[0033] (3) Continuous casting, using the R10m 5-machine 5-strand continuous casting machine produced by Italian Danieli Company, to cast a rectangular billet of 220*260mm;

[0034] (...

Embodiment 2

[0038] Another high-carbon low-alloy wear-resistant ball steel, its chemical composition weight percentage (wt%) is: C 0.99%, Si 0.29%, Mn 1.04%, Cr 0.55%, Ni 0.02%, Mo 0.02%, Al 0.043%, S 0.003%, P 0.007%, Cu 0.04%, the rest is Fe.

[0039] Production technology is identical with embodiment 1.

[0040] The steel used for the wear-resistant ball is ∮75mm, and the properties of the steel are as follows:

[0041] Types A, B, and C of non-metallic inclusions are all grade 0, grade D is coarse and grade 0, and grade D is fine is grade 0.5; the oxygen content is 8.4ppm.

Embodiment 3

[0043] Another high-carbon low-alloy wear-resistant ball steel, its chemical composition weight percentage (wt%) is: C 0.99%, Si 0.27%, Mn 1.07%, Cr 0.55%, Ni 0.02%, Mo 0.02%, Al 0.041%, S 0.004%, P 0.011%, Cu 0.04%, and the rest is Fe.

[0044] Production technology is identical with embodiment 1.

[0045] The steel used for the wear-resistant ball is ∮80mm, and the properties of the steel are as follows:

[0046] Types A, B, and C of non-metallic inclusions are all grade 0, category D is coarse and grade 0, and category D is fine is grade 0.5; the oxygen content is 7.7ppm.

[0047] Studies have shown that: the steel for wear-resistant balls of the present invention has good properties of forged or rolled steel balls, and the method of continuously making the steel balls fall freely for 48 hours from a height of 8 meters is used to test the wear-resistant and impact-resistant properties of the steel balls. All the balls have passed the test, and the steel balls have high we...

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PUM

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Abstract

The invention discloses a high-carbon low-alloy wear-resistant ball steel which comprises the chemical components by weight: 0.95-1.05% of C, 0.15-0.35% of Si, 1.00-1.20% of Mn, 0.45-0.65% of Cr, 0.020-0.045% of AL, less than or equal to 0.25% of Ni, less than or equal to 0.25% of Mo, less than or equal to 0.025% of S, less than or equal to 0.025% of P, less than or equal to 0.025% of Cu, and the balance of Fe. The production process comprises the steps of conducting electric furnace smelting, LF refining, VD refining, continuous casting and continuous rolling, adopting hot charging and hot conveying process, and rolling into round steel by a continuous rolling unit; and forging or rolling the round steel into steel balls. The alloy wear-resistant ball steel is low in cost, uniform in steel, high in cleanness, and good in wear resistance and impact resistance properties; and the production process is simple, can ensure the steel quality, improve the rolling rate and production efficiency, and is low in production cost.

Description

technical field [0001] The invention relates to a high-carbon low-alloy steel, in particular to a low-cost, high-wear-resistant high-carbon low-alloy wear-resistant ball steel and a production process 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 efficien...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/18C22C38/20C22C38/22C22C38/40C22C38/44C22C38/42C21C5/52C21C7/10
CPCY02P10/20
Inventor 许加陆黄国俊周浩
Owner ZENITH STEEL GROUP CORP CO LTD