Wear-resistant bainite cast steel liner plate and manufacture process thereof

A manufacturing method, bainite technology, applied in the direction of manufacturing tools, casting molding equipment, molding machines, etc., can solve the problems of quenching medium easy to pollute the environment, unstable quality, high production cost, etc., to improve the performance of lining board and production process Simple and easy to implement, the effect of improving hardenability

Inactive Publication Date: 2009-04-01
YUNNAN KUNGANG WEAR RESISTANT MATERIAL SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to overcome the shortcomings of the existing alloy steel liners such as complex process, long process, large energy consumption, easy pollution of the quenching medium, high production cost, and unstable quality, the present invention provides a new type of bainite multiphase structure. Wear-resistant cast steel liner and manufacturing method thereof

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  • Wear-resistant bainite cast steel liner plate and manufacture process thereof
  • Wear-resistant bainite cast steel liner plate and manufacture process thereof
  • Wear-resistant bainite cast steel liner plate and manufacture process thereof

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Embodiment Construction

[0024] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0025] The composition mass ratio (wt.%) of cast steel liner plate in the present invention is: C: 0.45~0.55%; Si: 1.6~2.0%; Mn: 2.8~3.3%; P≤0.06%; S≤0.04%; The amount is Fe.

[0026] Put the raw materials after the chemical composition of Examples 1-4 listed in the following table into the intermediate frequency induction furnace for smelting. The electric furnace uses an acidic furnace lining, and uses quartz sand as a slagging agent. Add Si and Mn alloy elements 5 minutes before the furnace is released. , control the temperature of the molten steel at 1530°C, and the final deoxidation is the deoxidation in the aluminum wire ladle:

[0027]

[0028] (1) The melted molten steel is cast into shape according to the following method: vacuum solid mold casting (EPC). Specifically: first bond the lining boards into strings, t...

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Abstract

The present invention relates to one kind of wear resistant bainite cast steel liner plate and its manufacture process. The cast steel liner plate material consists of C 0.45-0.55 wt%, Si 1.6-2.0 wt%, Mn 2.8-3.3 wt%, P not more than 0.06 wt%, S not more than 0.04 wt% and Fe for the rest. Its manufacture process includes smelting in a medium frequency induction furnace, vacuum casting, cooling controlling heat treatment to obtain complex phase bainite structure, and final low temperature tempering. The liner plate material consists of needle like bainite as main component, small amount of martensite and residual austenite, and has hardness of HRC53-55, impact toughness of 22-27 J / sq cm, and excellent comprehensive performance.

Description

technical field [0001] The invention relates to a bainite wear-resistant cast steel liner and a manufacturing method thereof, belonging to the technical field of metal materials and their preparation. Background technique [0002] Ball mills are widely used in mining, metallurgy, building materials, electric power, chemical industry and other fields. As the main wear parts, the liner in the ball mill consumes a lot. At present, the ball mill liners widely used in our country are still traditional high-manganese steel liners. Due to the small impact force received during use, it is difficult to obtain the ideal work-hardening effect, so the wear resistance is poor. The resistance is low, and the surface of the liner will be plastically deformed during use, causing the liners to bite together or even deform as a whole. Other materials such as high chromium cast iron liner, although the initial hardness is high, but the impact toughness is poor, easy to break; there is another...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/04C22C33/04C21C7/06B22D27/04C21D9/46C21D1/18B22D18/00B22C11/00
Inventor 周荣蒋业华黎振华周荣锋卢德宏张玉勤
Owner YUNNAN KUNGANG WEAR RESISTANT MATERIAL SCI
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