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Materials and methods suitable for production of large-diameter wear-resistant steel balls for semi-autogenous mills

A semi-autogenous mill and large-diameter technology, applied in furnaces, heat treatment equipment, manufacturing tools, etc., can solve problems such as fatigue resistance, general wear resistance, influence of mine mill operation, low alloying elements, etc., to achieve extended durability Fatigue performance, increase the effective working time, increase the effect of wear resistance

Active Publication Date: 2021-08-31
SHANDONG IRAETA HEAVY IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, there are more and more large-scale semi-autogenous grinding machines at home and abroad. The quality of semi-autogenous grinding wear-resistant steel balls is related to the normal production and operation of the mill and the production cost. Currently, the steel bar alloy used in the production of steel balls on the market The elements are low, the fatigue resistance and wear resistance are average, and it is easy to break during use
[0003] Regarding the steel bar for wear-resistant steel ball production, the commercially available steel bar for wear-resistant steel ball production, its chemical composition is shown in Table 1 of the instruction manual. The disadvantage of the above-mentioned steel bar for wear-resistant steel ball production is that using the above-mentioned The steel ball products made of materials have low alloy elements, general fatigue resistance and wear resistance, and are easy to break during use, which has a serious impact on the operation of mine mills.

Method used

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  • Materials and methods suitable for production of large-diameter wear-resistant steel balls for semi-autogenous mills
  • Materials and methods suitable for production of large-diameter wear-resistant steel balls for semi-autogenous mills
  • Materials and methods suitable for production of large-diameter wear-resistant steel balls for semi-autogenous mills

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] It is suitable for the production of large-diameter wear-resistant steel balls for semi-autogenous mills. The chemical composition is: C0.75%, Si 0.4%, Mn 0.8%, P≤0.020%, S≤0.020%, Cr 1.5%, Ni≤0.30, Cu≤0.25%, Mo0.20; the balance is iron and other unavoidable impurities.

Embodiment 2

[0038] Steel ball in embodiment 1, the step of its production process is as follows:

[0039] (1) Use the plasma cutting machine to cut the qualified raw materials;

[0040] (2) Heat the prepared material to a temperature of about 1200°C;

[0041] (3) Transfer the raw material heated to the preset temperature to the air hammer for about 40 times of forging;

[0042] (4) When the forged steel ball is delivered to a quenching temperature of about 800°C, the steel ball is quenched;

[0043] (5) The steel ball is tempered immediately after quenching;

[0044] (6) After the steel ball is tempered, it is inspected.

[0045] Table 1 The chemical composition of the bars for steel balls currently available on the market

[0046]

Embodiment 3

[0048] The inventor has detected product of the present invention, and detection result is as follows:

[0049] 1. Hardness comparison test results HRC: Take 125 balls as an example (1 / 2 / 3 are new materials)

[0050]

[0051] Through the destructive core-pulling test, the five-point hardness distribution is more uniform, the hardness difference between the core and the surface is smaller, and the wear resistance is more stable during the operation of the mill.

[0052] 2. Comparative detection of drop test (1# is new material):

[0053]

[0054] Through the comparison of the drop test, it can be seen that the number of drops of the steel ball produced by the new material is significantly higher than that of other materials under the same conditions, so it can be seen from the comparison that the fatigue resistance of the product produced by the new material is significantly stronger than that produced by the conventional material.

[0055] 3. Comparison of actual wear i...

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Abstract

The invention relates to the field of wear-resistant steel ball production, in particular to a material suitable for the production of large-diameter wear-resistant steel balls for semi-autogenous mills. The material suitable for the production of large-diameter wear-resistant steel balls in semi-autogenous mills is characterized in that the chemical composition of the material is: C 0.5-0.9%, Si 0.2-0.5%, Mn 0.6-1.0%, P ≤0.020%, S≤0.020%, Cr 1.20~1.7%, Ni≤0.30, Cu≤0.25%, Mo0.10~0.25; the balance is iron and other unavoidable impurities. The present inventor obtained the best bar component distribution ratio by continuously optimizing and adjusting the alloy element content inside the steel, which can adapt to the complex working environment in the mill, prolong the fatigue resistance of wear-resistant steel balls, and increase the The wear resistance of the ball is improved, and the broken rate of the steel ball is effectively reduced, and the service life is longer, which can better save the wear consumption of the mining enterprise and reduce the grinding cost.

Description

technical field [0001] The invention relates to the field of wear-resistant steel ball production, in particular to a material suitable for the production of large-diameter wear-resistant steel balls in semi-autogenous mills, and also to a production method for the above-mentioned material. Background technique [0002] At present, there are more and more large-scale semi-autogenous grinding machines at home and abroad. The quality of semi-autogenous grinding wear-resistant steel balls is related to the normal production and operation of the mill and the production cost. The steel bar alloy used in the production of steel balls in the market The elements are low, the fatigue resistance and wear resistance are average, and it is easy to break during use. [0003] Regarding the steel bar for wear-resistant steel ball production, the commercially available steel bar for wear-resistant steel ball production, its chemical composition is shown in Table 1 of the instruction manual....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/42C22C38/44C21D1/18C21D9/36C21D8/00
CPCC21D1/18C21D8/005C21D9/36C22C38/002C22C38/02C22C38/04C22C38/42C22C38/44
Inventor 牛余刚高玉和秦英超韩增强张甜甜王聪
Owner SHANDONG IRAETA HEAVY IND
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