Alloy material for large semi-autogenous mill cylinder lining plate

A technology of alloy material and semi-autogenous grinding machine, which is applied in the field of wear-resistant equipment, can solve the problems of large fluctuation range of casting hardness, temper brittleness of lining plate, and reduced production efficiency, so as to avoid temper brittleness, save manpower and Material resources and the effect of improving production efficiency

Inactive Publication Date: 2017-04-26
无锡欣誉户外用品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In actual production, the time for normalizing a furnace of castings is between 2-3 hours, and the time for heating pretreatment and tempering of castings is not included, which greatly reduces production efficiency, and the lining board cannot be processed in time. Tempering is easy to produce temper brittleness, and the hardness of castings after normalizing has a large fluctuation range

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] An alloy material for a cylinder lining plate of a large semi-autogenous mill, comprising the following components in parts by weight:

[0029] C: 0.42%, Si: 0.6%, Mn: 0.9%, P: ≤ 0.04%, S: ≤ 0.04%, Cr: 2.5%, Mo: 0.4%, Cu: 0.35%, and the balance is Fe.

[0030] The heat treatment process of this alloy material is:

[0031] 1) When the lining plate made of alloy material is heated to 960 ° C, the lining plate is oil-cooled for 30 to 40 seconds after heat preservation;

[0032] 2) After the oil is cooled, transfer the lining plate into the furnace and keep it for 30min without heating;

[0033] 3), take the lining plate out of the furnace, and put it into the furnace again when it is cooled to not higher than 200 °C;

[0034] 4), tempering, the tempering temperature is 400 ℃.

Embodiment 2

[0036] An alloy material for a cylinder lining plate of a large semi-autogenous mill, comprising the following components in parts by weight:

[0037] C: 0.50%, Si: 1.0%, Mn: 1.6%, P: ≤ 0.04%, S: ≤ 0.04%, Cr: 2.0%, Mo: 0.3%, Cu: 0.25%, and the balance is Fe.

[0038] The heat treatment process of this alloy material is the same as that of Implementation 1.

Embodiment 3

[0040] An alloy material for a cylinder lining plate of a large semi-autogenous mill, comprising the following components in parts by weight:

[0041] C: 0.46%, Si: 0.8%, Mn: 1.2%, P: ≤ 0.04%, S: ≤ 0.04%, Cr: 2.2%, Mo: 0.35%, Cu: 0.3%, and the balance is Fe.

[0042] The heat treatment process of this alloy material is the same as that of Implementation 1.

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Abstract

The invention discloses an alloy material for a large semi-autogenous mill cylinder lining plate. The alloy material comprises the following components in parts by weight: 0.42-0.50% of C, 0.6-1.0% of Si, 0.9-1.6% of Mn, P not more than 0.04%, S not more than 0.04%, 2.0-2.5% of Cr, 0.3-0.4% of Mo, 0.25-0.35% of Cu, and the balance of Fe. The alloy material reduces the carbon content, and adopts a heat treatment process of oil cooling+tempering; when the lining plate is heated to 960 DEG C, the lining plate is cooled in oil by 30-40 seconds after insulation; the lining plate is transferred into a furnace after oil cooling for keeping by 30 min in a state of not heating; when the lining plate is cooled to not above 200 DEG C, the lining plate is fed in the furnace again; and the lining plate is tempered at 400 DEG C. The alloy material is short in oil cooling time and higher in lining plate temperature; the structure of the finally obtained material is pearlite+sorbite; the improved heat treatment process greatly improves the production efficiency; after treatment, the hardness of the lining plate is more uniform, so that the tempering brittleness of a casting due to incapability of tempering is prevented; the prepared lining plate reaches the hardness of 355-375 HB; and the service life of the lining plate is nearly 4 months.

Description

technical field [0001] The invention relates to the field of wear-resistant equipment, in particular to an alloy material for a cylinder lining plate of a large-scale semi-autogenous mill. Background technique [0002] With the rapid development of science and technology and modern industry, the operation speed of mechanical equipment is getting higher and higher, and the frictional parts are worn faster and faster, and its service life is increasingly affecting modern equipment (especially high-speed operation). automatic production line) is an important factor in production efficiency. Although material wear rarely causes catastrophic damage to metal workpieces, the energy and material consumption it causes can be staggering. [0003] According to statistics, about 30% of the energy in the world's industrialized countries is consumed in different forms on wear and tear. For example, in the United States, the annual loss due to friction, wear and corrosion is about 100 bi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/22B02C17/22C21D6/00
CPCB02C17/22C21D6/002C21D6/005C21D6/008C22C38/02C22C38/04C22C38/12C22C38/16
Inventor 华晓东
Owner 无锡欣誉户外用品有限公司
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