Medium manganese steel lining material for ball mill and preparing method of material

A technology of ball mill and manganese steel, applied in the field of wear-resistant materials, can solve problems such as complex heat treatment process, achieve the effects of simplifying heat treatment process, uniform surface hardness, and improving yield strength

Inactive Publication Date: 2018-05-01
HENAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The ball mill liner material disclosed in this patent has certain impact toughness, but its hardness and hardenability still need to be further improved, and the heat treatment process is relatively complicated

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The medium manganese steel liner material for the ball mill of the present embodiment consists of the following components in mass percentage:

[0032] Carbon 0.27%, manganese 5.2%, silicon 0.15%, phosphorus 0.009%, sulfur 0.010%, niobium 0.01%, chromium 0.33%, and the balance is iron.

[0033] The preparation method of the medium manganese steel liner material for the ball mill of the present embodiment comprises the following steps:

[0034] 1) Calculate the weight of each raw material required according to the above mass percentage and weigh each raw material for later use; load scrap steel and pig iron raw materials into the vacuum induction melting furnace, and start vacuuming after the charging is completed. When the vacuum degree reaches 10Pa, induction melting The furnace starts to supply power to heat the charge;

[0035] 2) Add ferrosilicon, ferromanganese, ferrochrome and ferroniobium which were preheated at 200°C for 1.5h in sequence after the scrap steel a...

Embodiment 2

[0040] The medium manganese steel liner material for the ball mill of the present embodiment consists of the following components in mass percentage:

[0041] Carbon 0.28%, manganese 6.48%, silicon 0.20%, phosphorus 0.007%, sulfur 0.006%, niobium 0.03%, chromium 0.45%, and the balance is iron.

[0042] The preparation method of the medium manganese steel liner material for the ball mill of the present embodiment comprises the following steps:

[0043] 1) Calculate the weight of each raw material required according to the above mass percentage and weigh each raw material for later use; put scrap steel and pig iron raw materials into the vacuum induction melting furnace, and start vacuuming after the charging is completed. When the vacuum degree reaches 25Pa, induction melting The furnace starts to supply power to heat the charge;

[0044] 2) Add ferrosilicon, ferromanganese, ferrochrome and ferroniobium which were preheated at 200°C for 1.5h in sequence after the scrap steel a...

Embodiment 3

[0049] The medium manganese steel liner material for the ball mill of the present embodiment consists of the following components in mass percentage:

[0050] Carbon 0.35%, manganese 5.5%, silicon 0.25%, phosphorus 0.008%, sulfur 0.008%, niobium 0.03%, chromium 0.5%, and the balance is iron.

[0051] The preparation method of the medium manganese steel liner material for the ball mill of the present embodiment comprises the following steps:

[0052] 1) Calculate the weight of each raw material required according to the above mass percentage and weigh each raw material for later use; load scrap steel and pig iron raw materials into the vacuum induction melting furnace, and start vacuuming after the charging is completed. When the vacuum degree reaches 5Pa, induction melting The furnace starts to supply power to heat the charge;

[0053] 2) Add ferrosilicon, ferromanganese, ferrochrome and ferroniobium which were preheated at 200°C for 1.5h in sequence after the scrap steel and p...

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Abstract

The invention relates to a medium manganese steel lining material for a ball mill and a preparing method of the material, and belongs to the technical field of wear-resisting materials. The medium manganese steel lining material for the ball mill is composed of components including, by mass percent, 0.2 to 0.6% of carbon, 5.0 to 8.0% of manganese, 0.1 to 0.3% of silicon, not larger than 0.015% ofphosphorus, not larger than 0.015% of sulphur, 0.01 to 0.05% of niobium, 0.3 to 0.8% of chromium and the balance iron. According to the medium manganese steel lining material for the ball mill, methodof vacuum smelting and pressure casting is adopted for preparing. The mechanical property and the wear-resisting performance of the medium manganese steel lining material for the ball mill are excellent, the anti-bending strength reaches 821 MPa, the hardness reaches 55HRC, the impact power of a V-shaped sample reaches 30J, and the service life is prolonged by more than 25% compared with a traditional high manganese steel lining plate.

Description

technical field [0001] The invention relates to a medium manganese steel liner material for a ball mill and a preparation method thereof, belonging to the technical field of wear-resistant materials. Background technique [0002] Ball mill is the key equipment for crushing materials after they are crushed. It is widely used in mineral processing, building materials and chemical industries. The ball mill liner is used to protect the cylinder from the direct impact and friction of the grinding body and the material. In order to continuously improve the production efficiency of the ball mill and reduce the production cost of the ball mill, manufacturers put forward higher requirements on the service life of the liner of the ball mill. [0003] High manganese steel occupies an important position in wear-resistant metal materials, and this material has been widely used in metallurgy, mining, building materials, raw material processing and other industries. However, the austenit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/38C22C38/26C22C38/02C22C33/06B02C17/22
CPCC22C38/38B02C17/22C22C33/06C22C38/02C22C38/26
Inventor 汪宙魏世忠游龙潘昆明张国赏王晓东张小军
Owner HENAN UNIV OF SCI & TECH
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