High-chrome multicomponent alloy steel lining plate for mine

A technology of alloy steel and liner, which is applied in the field of low-alloy wear-resistant steel, can solve the problems of inability to produce work hardening, easy breakage, and high product cost, and achieve the effects of improving impact toughness, improving impact toughness, and reducing raw material costs

Inactive Publication Date: 2012-07-11
NINGGUO LONGFEI WEAR RESISTEANT MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are some defects in the application of this kind of lining plate to the processing of medium-hard abrasives. For materials with work-hardening properties, because the hardness of the abrasive is relatively soft, work-hardening cannot occur, so the anti-wear performance cannot meet the requirements.
For ordinary high-hardness materials, because it contains sulfur, phosphorus and other impurity elements, iron has no absolute purity, and the processed liner has many impurities, insufficient toughness, easy to break, and short service life.
The alloy steel lining plate researched and developed in this field in modern times is mainly medium carbon alloy steel, which adopts casting, annealing, quenching, and tempering processes. Its components contain more precious metals such as Cr, Mo, and Cu, and the product cost is high. Control, toughness does not meet the requirements, and the application unit consumption is also high, which cannot reach the ideal level

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0008] The alloy composition by weight percentage is: C: 0.9, Si: 1.2, Mn: 1.1, Cr: 11, Mo: 0.5, Ni: 0.8, B: 0.1, Ti: 0.2, potassium and sodium modifier: 0.4, and the rest of the ingredients are Iron, after batching→add half of the potassium and sodium modifier→casting at 1500℃→add the other half of the potassium and sodium modifier→casting molding→heating and heat preservation to 950℃→quenching in oil at 85℃→heating to 180 Tempering at ℃, constant temperature for 4 hours → slow cooling with the furnace to 150 ℃ to get the final lining product, product hardness HRC = 59, impact toughness a k =30J·cm 2 .

Embodiment 2

[0010] The alloy composition by weight percentage is: C: 1.8, Si: 0.8, Mn: 1.5, Cr: 14, Mo: 0.4, Ni: 0.5, B: 0.2, Ti: 0.1, potassium and sodium modifier: 0.2, and the remaining ingredients are Iron, after batching→add half of the potassium and sodium modifier→casting at 1500℃→add the other half of the potassium and sodium modifier→casting molding→heating and heat preservation to 950℃→quenching in oil at 85℃→heating to 180 Tempering at ℃, constant temperature for 4 hours → slow cooling with the furnace to 150 ℃ to get the final lining product, product hardness HRC = 60, impact toughness a k =32J·cm 2

Embodiment 3

[0012] The alloy composition by weight percentage is: C: 0.6, Si: 0.6, Mn: 0.8, Cr: 12, Mo: 0.2, Ni: 0.7, B: 0.1, Ti: 0.2, potassium and sodium modifier: 0.3, and the rest of the ingredients are Iron, after batching→add half of the potassium and sodium modifier→casting at 1500℃→add the other half of the potassium and sodium modifier→casting molding→heating and heat preservation to 950℃→quenching in oil at 85℃→heating to 180 Tempering at ℃, constant temperature for 4 hours → slow cooling with the furnace to 150 ℃ to get the final lining product, product hardness HRC = 57, impact toughness a k =31J·cm 2 .

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Abstract

The invention relates to a high-chrome multicomponent alloy steel lining plate for a mine. Steel of the lining plate comprises the chemical compositions by weight percent as follows: C accounting for 0.5-1.8, Si accounting for 0.5-1.2, Mn accounting for 0.8-1.5, Cr accounting for 11-14, Mo accounting for 0.2-0.5, Ni accounting for 0.5-0.8, B accounting for 0.1-0.2, Ti accounting for 0.1-0.2, a potassium / sodium inoculant accounting for 0.2-0.4, and iron in balancing amount. The high-chrome multicomponent alloy steel lining plate is characterized in that the contents of precious metals including molybdenum and nickel are reduced by changing the compositions of the lining plate and adding the potassium / sodium inoculant; and compared with the traditional product, the manufactured lining plate has the advantages that the toughness is enhanced by 30% to 40%, the service life is prolonged more than twice, and the cost of raw materials is reduced by 20% to 30%, so that the high-chrome multicomponent alloy steel lining plate has a wide market prospect.

Description

technical field [0001] The invention relates to the field of low-alloy wear-resistant steel, in particular to a high-chromium multi-element alloy steel lining plate for mines. Background technique [0002] The liner is a consumable part that is second only to the grinding ball in the consumption of the ball mill. At present, the wear-resistant liner of the ball mill at home and abroad, such as ZGMn13 is used in China, and the American National Standard ANSI / ASTM and A532-82 are used in the United States. A group of II-B, II-C, II-D and II-E alloy cast iron, wear-resistant liners made of these grades are mainly suitable for high-hardness abrasive wear conditions, such as ore and sand, these materials Work hardening occurs during processing, or it has high hardness itself, so as to achieve the purpose of anti-wear and long service life. However, there are some defects in applying the liner made of this material to the processing of medium-hard abrasives. For materials with wo...

Claims

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Application Information

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IPC IPC(8): C22C38/54
Inventor李义平
OwnerNINGGUO LONGFEI WEAR RESISTEANT MATERIALS