High-carbon medium-chromium medium-manganese multicomponent alloy steel ball mill lining plate and thermal treatment process thereof

A technology of alloy steel balls and carbon in chromium, which is applied in the field of high carbon, medium chromium, medium manganese multi-element alloy steel ball mill liner and heat treatment process, and can solve the problem of high hardness

Active Publication Date: 2015-07-01
ANSTEEL GRP MINING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned patents and related tests have proved and recognized the role of the "chromium" element in improving hardness and wear resistance, but they only play a role in the hardness of chromium, and the hardness is high, wear resistance and corrosion resistance, etc. insufficient

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] First put the lining board of Example 1 into the furnace, and keep the gap between the lining boards at 120mm; power transmission is increased to 570°C at a rate of 80°C / hour; heat preservation for 2 hours; then continue to heat up to 890°C, and heat preservation for 5 hours Take it out of the oven, and then cool it with wind and mist for 2 hours, and the air supply volume of the air compressor is 8000m 3 / hour, the full wind pressure is 1000Pa. The air supply pipeline system is made by air supply from an air compressor. There are 8 rows of 32 mm in diameter connected to the main air duct. Each pipe is provided with air outlet holes with a distance of 150 mm and a diameter of 4 mm on the pipe wall. Connect a water pipe with a diameter of 16mm between the main pipe and the 8 rows of thin pipe joints. 3 / hour flow, and then naturally cool to room temperature in the air.

[0030] Return the lining plate after the first air-fog cooling to the room temperature furnace f...

Embodiment 2

[0034] First put the lining board of Example 2 into the furnace, and keep the gap between the lining boards at 110mm; power transmission is increased to 580°C at a rate of 90°C / hour; keep warm for 2.5 hours; then continue to heat up to 900°C, and keep warm for 6 hours Immediately and quickly out of the oven, and then cooled by wind and mist for 3 hours, the air supply volume of the air compressor is 10,000 cubic meters per hour, and the full air pressure is 2000Pa. With the same example 1 of the air compressor air supply device, during the air supply, the air is naturally cooled to room temperature with a water pipe at a flow rate of 3 cubic meters per hour.

[0035] Return the second air-fog-cooled liner to the room temperature furnace again, and heat it from room temperature to 580 °C at a rate of 80 °C / hour for 9 hours; then take it out of the furnace and air cool to room temperature.

[0036] Finally, return the liner to the furnace at room temperature and heat it to 260°C. ...

Embodiment 3

[0039] First, put the lining board of Example 3 into the room temperature furnace, keep the gap between the lining boards at 130 mm; increase the temperature to 590 °C at a rate of 100 °C / hour during power transmission; keep warm for 2 hours; then continue to heat up to 895 °C and keep warm for 5.5 Immediately after one hour, it will be quickly released from the oven, and immediately cooled by wind and mist for 2.5 hours. The air supply volume of the air compressor can meet the requirements between 9000 cubic meters per hour and the total wind pressure of 3000Pa. Air compressor air supply air duct system is the same as example 1, adjust to 4 cubic meters / hour flow rate with water pipe during air supply and then cool to room temperature in air naturally.

[0040] Return the liner after the air-fog cooling to the room temperature furnace again, heat it from room temperature with electricity, increase the temperature to 590 °C at a rate of 70 °C / hour, and keep it for 8.5 hours; th...

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Abstract

The invention relates to a high-carbon medium-chromium medium-manganese multicomponent alloy steel ball mill lining plate and a thermal treatment process thereof. The high-carbon medium-chromium medium-manganese multicomponent alloy steel ball mill lining plate comprises the following chemical components in percentage by weight: 0.7-1.5% of C, 1.8-2.5% of Cr, 0.5-0.8% of Ni, 1.0-1.6% of Mn, 0.2-0.5% of Si, 0.4-0.9% of Mo, 0.4-1% of Cu, 0.05-0.1% of V, 0.03-0.06% of Ti, 0.002-0.005% of B, not more than 0.03% of P, not more than 0.025% of S and the balance of Fe. Steel is prepared according to the content of the chemical components, and then the lining plate is cast; after being subjected to thermal treatment, the lining plate can achieve good mechanical performances and good wear resistance and corrosion resistance, has brinell hardness of 390-450, impact toughness (without a notch) of 110-150J / cm<2>, and the service life of the lining plate is one year and a half.

Description

[0001] The invention belongs to the technical field of wear-resistant metal materials in the iron and steel metallurgy industry, and in particular relates to a high-carbon, medium-chromium, medium-manganese multi-element alloy steel ball mill liner and a heat treatment process. Background technique [0002] Seeking high-quality, high wear-resisting ball mill liners in mine beneficiation production is a more attractive research topic. At present, the sight of researching wear-resistant ball mill liners at home and abroad has shifted from high manganese steel to alloy steel. The fact that the service life of high manganese steel used in ball mill liners is lower than that of alloy steel has been confirmed. verification. The reason is that the high manganese steel is not used in the high impact state, and it is applied on the ball mill under the condition that the hard layer cannot be formed, the hardness is low, and the HB is only about 200. The Rockwell hardness of the ball mi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/58C22C38/54C21D1/18C21D6/00
CPCC21D1/18C21D6/00C22C38/18C22C38/40C22C38/42C22C38/44C22C38/46C22C38/50C22C38/54C22C38/58
Inventor 韩建国黄金凤陈荫祚李辉
Owner ANSTEEL GRP MINING CO LTD
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