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High-strength high-toughness wear-resistant ball and preparation process thereof

A preparation process and high toughness technology, applied in the field of wear-resistant balls, can solve the problems of low impact toughness, low hardness, poor wear resistance, etc.

Inactive Publication Date: 2018-02-27
NINGGUO ZHENGXING WEAR RESISTANT MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although the existing wear-resistant balls provided by the prior art have good mechanical properties, strong impact toughness, and low unit wear, they still have the defects of relatively low hardness, low impact toughness, and poor wear resistance.

Method used

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  • High-strength high-toughness wear-resistant ball and preparation process thereof
  • High-strength high-toughness wear-resistant ball and preparation process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A high-strength and high-toughness wear-resistant ball, composed of the following elements: C: 1.5%, Si: 0.3%, Mn: 0.3%, Cr: 1.5%, W: 0.01%, Mo: 0.01%, P ≤0.05%, S≤0.05%, Sr: 0.05%, B: 0.05%, Zn: 0.1%, Mg: 0.02%, the balance is Fe;

[0024] The preparation process of the high-strength and high-toughness wear-resistant ball includes the following steps:

[0025] (1) Add pig iron, scrap steel, ferromanganese, ferrochrome, ferrotungsten, ferromolybdenum, ferro-strontium, ferro-zinc, ferro-magnesium, and recarburizer to the intermediate frequency induction furnace in sequence, heat to 1480°C, and smelt molten iron, then Carry out standing slag removal treatment;

[0026] (2) Add chromite sand powder to molten iron at 1480°C, stir evenly by ultrasonic, use wire feeding method to spheroidize, add SiFe and SiCa composite inoculant with 0.1% mass of molten iron, and incubate for a period of time;

[0027] (3) In the later stage of smelting, add a nodulizer to the nodulizer, c...

Embodiment 2

[0031] A high-strength and high-toughness wear-resistant ball, composed of the following elements: C: 2.5%, Si: 0.8%, Mn: 0.7%, Cr: 2.0%, W: 0.03%, Mo: 0.05%, P ≤0.05%, S≤0.05%, Sr: 0.15%, B: 0.1%, Zn: 0.4%, Mg: 0.04%, and the balance is Fe.

[0032] The preparation process of the high-strength and high-toughness wear-resistant ball includes the following steps:

[0033] (1) Add pig iron, steel scrap, ferromanganese, ferrochrome, ferrotungsten, ferromolybdenum, ferro-strontium, ferro-zinc, ferro-magnesium, and recarburizer to the medium-frequency induction furnace in sequence, heat to 1550°C, and smelt molten iron, then Carry out standing slag removal treatment;

[0034] (2) Add chromite sand powder to molten iron at 1530° C., stir evenly by ultrasonic, spheroidize by wire feeding method, add SiFe and SiCa composite inoculant with 0.1% mass of molten iron, and incubate for a period of time;

[0035] (3) In the later stage of smelting, add a nodulizer to the nodulizer, cover ...

Embodiment 3

[0039] A high-strength and high-toughness wear-resistant ball, composed of the following elements: C: 1.8%, Si: 0.5%, Mn: 0.4%, Cr: 1.6%, W: 0.01%, Mo: 0.02%, P ≤0.05%, S≤0.05%, Sr: 0.08%, B: 0.06%, Zn: 0.2%, Mg: 0.02%, and the balance is Fe.

[0040] The preparation process of the high-strength and high-toughness wear-resistant ball includes the following steps:

[0041](1) Add pig iron, scrap steel, ferromanganese, ferrochrome, ferrotungsten, ferromolybdenum, ferro-strontium, ferro-zinc, ferro-magnesium, and recarburizer into the medium-frequency induction furnace in sequence, heat to 1490°C, and smelt molten iron, then Carry out standing slag removal treatment;

[0042] (2) Add chromite sand powder to molten iron at 1490°C, stir evenly by ultrasonic, use wire feeding method to spheroidize, add SiFe and SiCa composite inoculant with 0.1% mass of molten iron, and incubate for a period of time;

[0043] (3) In the later stage of smelting, add a nodulizer to the nodulizer, co...

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Abstract

The invention relates to the technical field of wear-resistant balls, in particular to a high-strength high-toughness wear-resistant ball and a preparation process thereof. The high-strength high-toughness wear-resistant ball is composed of 1.5%-2.5% of C, 0.3%-0.8% of Si, 0.3%-0.7% of Mn, 1.5%-2.0% of Cr, 0.01%-0.03% of W, 0.01%-0.05% of Mo, less than or equal to 0.05% of P, less than or equal to0.05% of S, 0.05%-0.15% of Sr, 0.05%-0.1% of B, 0.1%-0.4% of Zn, 0.02%-0.04% of Mg and the balance Fe. By means of the wear-resistant ball, the defects that existing wear-resistant balls are low in hardness and impact toughness and poor in wear resistance are effectively made up to a certain extent.

Description

technical field [0001] The invention relates to the technical field of wear-resistant balls, in particular to a high-strength and high-toughness wear-resistant ball and a preparation process thereof. Background technique [0002] Wear-resistant ball is a kind of crushing medium used in ball mills, used to crush the materials in the mill, one is white cast iron with chromium as the main alloying element, referred to as chromium alloy cast iron, and the cast iron with chromium alloy cast iron as material The grinding ball is called chromium alloy cast iron grinding ball; the other is that the casting grinding ball made of ductile iron is called ductile iron grinding ball, and the matrix structure obtained by heat treatment is mainly bainite. Martensitic ductile iron grinding ball; the matrix structure obtained by heat treatment is mainly martensitic ductile iron grinding ball, referred to as martensitic ductile iron grinding ball. [0003] With the development of industry, va...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C37/10C22C33/08C21D5/00C21D1/18C21D9/36
CPCC22C37/10C21D1/18C21D5/00C21D9/36C22C33/08C22C37/06
Inventor 李根有李骏
Owner NINGGUO ZHENGXING WEAR RESISTANT MATERIALS
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