Boron-carbide-reinforced wear-resistant bainite ductile iron grinding ball and manufacturing method thereof

A technology of boron carbide and ductile iron grinding balls, which is applied in the field of wear-resistant materials, can solve the problems of poor wear resistance, less wear-resistant hardness of grinding balls, and high wear, and achieve the effect of simple heat treatment process and low production cost

Inactive Publication Date: 2013-07-31
LIAOYUAN JINCHENG HEAVY MINERAL PROCESSING MACHINERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the above invention still has the disadvantages of less wear-resistant hard phase in the grinding ball, low hardness, poor wear resistance, and high wear.

Method used

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  • Boron-carbide-reinforced wear-resistant bainite ductile iron grinding ball and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A 1000 kg intermediate frequency induction furnace is used to smelt boron carbide reinforced wear-resistant bainitic ductile iron grinding balls. The manufacturing process steps of the grinding balls are:

[0027] ①Heat and melt ordinary steel scrap, recarburizer, and ferrochrome, add ferrosilicon and ferromanganese after the molten iron is melted, after adjusting the composition before the furnace, raise the temperature of molten iron to 1532°C, add aluminum for deoxidation and alloying, and then sequentially Add ferro-titanium, ferro-boron and ferro-bismuth, and when the temperature of molten iron reaches 1561°C, it is released from the furnace.

[0028] ②Crush the yttrium-based heavy rare earth silicon-magnesium alloy and metal antimony into small pieces with a particle size of less than 12mm, dry them at 180°C for 3 hours, place them at the bottom of the ladle, and use the method of pouring into the ladle to spheroidize the molten iron.

[0029] ③Grinding balls with...

Embodiment 2

[0033] A 1000 kg intermediate frequency induction furnace is used to smelt boron carbide reinforced wear-resistant bainitic ductile iron grinding balls. The manufacturing process steps of the grinding balls are:

[0034] ①Heat and melt ordinary steel scrap, recarburizer, and ferrochromium, add ferrosilicon and ferromanganese after the molten iron is melted, after adjusting the composition before the furnace, raise the temperature of molten iron to 1542°C, add aluminum for deoxidation and alloying, and then sequentially Add ferro-titanium, ferro-boron and ferro-bismuth, and release it when the temperature of molten iron reaches 1579°C.

[0035] ②Crush the yttrium-based heavy rare earth silicon-magnesium alloy and metal antimony into small pieces with a particle size of less than 12mm, dry at 250°C for 2 hours, place them at the bottom of the ladle, and use the method of pouring into the ladle to spheroidize the molten iron.

[0036] ③Grinding balls with a diameter of 120mm are ...

Embodiment 3

[0040] A 1000 kg intermediate frequency induction furnace is used to smelt boron carbide reinforced wear-resistant bainitic ductile iron grinding balls. The manufacturing process steps of the grinding balls are:

[0041] ①Heat and melt ordinary steel scrap, recarburizer, and ferrochrome, add ferrosilicon and ferromanganese after the molten iron is melted, adjust the composition before the furnace, raise the temperature of molten iron to 1541°C, add aluminum for deoxidation and alloying, and then sequentially Add ferro-titanium, ferro-boron and ferro-bismuth, and release it when the temperature of molten iron reaches 1570°C.

[0042] ②Crush the yttrium-based heavy rare earth silicon-magnesium alloy and metal antimony into small pieces with a particle size of less than 12mm, dry them at 230°C for 3 hours, place them at the bottom of the ladle, and use the method of pouring into the ladle to spheroidize the molten iron.

[0043] ③Grinding balls with a diameter of 80mm are poured ...

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Abstract

The invention relates to a boron-carbide-reinforced wear-resistant bainite ductile iron grinding ball and a manufacturing method thereof. The invention is characterized in that the grinding ball comprises the following chemical components in percentage by mass: 3.35-3.65% of C, 2.50-2.90 of Si, 2.65-3.20 of Mn, 0.65-0.90 of Cr, 0.25-0.35 of B, 0.03-0.06 of Mg, 0.03-0.05 of Y, 0.05-0.09 of Bi, 0.08-0.12 of Ti, 0.03-0.08 of Al, 0.03-0.05 of Sb, at most 0.08 of P, at most 0.025 of S, and the balance of Fe and inevitable impurities. After being subjected to electric-furnace smelting, metal mold casting and water glass water solution quenching, the grinding ball has the characteristics of high hardness, favorable toughness, low crashing ratio, low abrasion and the like.

Description

technical field [0001] The invention belongs to the technical field of wear-resistant materials, and specifically relates to a boron carbide reinforced wear-resistant bainite ductile iron grinding ball and a manufacturing method thereof. Background technique [0002] Grinding balls are the main consumable parts of ball mills used in mining, building materials, electric power and chemical industries. With the rapid development of my country's economy, the demand for grinding balls is increasing. Since the early 1980s, my country has begun to develop and promote the application of high-chromium cast iron grinding balls. High-chromium cast iron grinding balls have excellent wear resistance and good impact fatigue resistance, and are suitable for manufacturing ball mill grinding balls. The use of this kind of grinding ball can reduce ball consumption and power consumption, and increase output and material fineness. In recent years, with the continuous rise in the price of chrom...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C37/06C22C33/10C21D5/00B02C17/20
Inventor 蒋建国杨村林宋学胜符寒光
Owner LIAOYUAN JINCHENG HEAVY MINERAL PROCESSING MACHINERY CO LTD
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