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a wc p /Preparation method of high manganese steel-based composite wear-resistant lining plate

A technology of composite wear-resistant lining plate and high manganese steel, applied in the field of composite materials, can solve the problem that it is difficult to take into account the structure and performance of the wear-resistant layer and the matrix layer, the hardenability cannot be well controlled, and the service life of the lining plate is shortened. problems, to achieve good economic applicability, not easy to crack and fall off, and increase the cost.

Active Publication Date: 2019-07-16
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Chinese invention patent CN202200604U discloses a wear-resistant ceramic liner made of composite material. A layer of rubber is set between the wear-resistant layer and the base layer, which has a certain impact resistance. Under the working conditions of impact and high heat, the rubber layer is easy to fall off, which ultimately reduces the service life of the liner to a large extent
Chinese invention patent CN1962122A discloses a preparation method of a double-liquid double-alloy wear-resistant liner. The wear-resistant layer and the base layer are both made of bainite steel. Because the phase change of bainite steel is not easy during heat treatment Control, the production of small-volume and thin liners can easily control the phase transition of the structure, so that the structure and performance can be better matched, but the production of large-volume and thick liners cannot control the hardenability of the heat treatment of the plates. , leading to uneven thickness of the wear-resistant layer, it is difficult to balance the structure and performance of the wear-resistant layer and the matrix layer

Method used

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  • a wc <sub>p</sub> /Preparation method of high manganese steel-based composite wear-resistant lining plate
  • a wc <sub>p</sub> /Preparation method of high manganese steel-based composite wear-resistant lining plate
  • a wc <sub>p</sub> /Preparation method of high manganese steel-based composite wear-resistant lining plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] WC described in this example P / High manganese steel base composite wear-resistant lining plate, tungsten carbide particle size is 60~80 mesh, high manganese steel powder particle size is 200 mesh, such as figure 1 As shown, the thickness of the matrix is ​​200 mm, the height of the inlay is 100 mm, the inlay is a cylindrical platform, the diameter of the upper circle is 12 mm, and the diameter of the lower circle is 8 mm. The components and weight percentages of the matrix and the inlay are shown in Table 1.

[0029] Table 1

[0030]

[0031] WC described in this example P / High manganese steel matrix composite wear-resistant liner and preparation method thereof, specifically comprising the following steps:

[0032] (1) Powder metallurgy: Mix spherical WC particles with a volume fraction of 10% and high manganese steel powder with a volume fraction of 90% through a ball mill, mill for 2 hours, put the ball-milled powder into a specific mold, and shape it through...

Embodiment 2

[0038] WC described in this example P / High manganese steel base composite wear-resistant lining plate, tungsten carbide particle size is 60~80 mesh, high manganese steel powder particle size is 300 mesh such as figure 1 As shown, the thickness of the matrix is ​​200 mm, the height of the inlay is 75 mm, the inlay is a cylindrical platform, the diameter of the upper circle is 12 mm, and the diameter of the lower circle is 8 mm. The components and weight percentages of the matrix and the inlay are shown in Table 2.

[0039] Table 2

[0040]

[0041] A WC described in this embodiment P / High manganese steel matrix composite wear-resistant liner and preparation method thereof, specifically comprising the following steps:

[0042] (1) Powder metallurgy: Mix spherical WC particles with a volume fraction of 20% and 80% high manganese steel powder through a ball mill for 2.2 hours of ball milling, put the ball-milled powder into a specific mold and pass it through a press for ...

Embodiment 3

[0048] WC described in this example P / High manganese steel base composite wear-resistant lining plate, tungsten carbide particle size is 60~80 mesh, high manganese steel powder particle size is 400 mesh such as figure 1 As shown, the thickness of the matrix is ​​200mm, the height of the inlay is 60mm, the inlay is a cylindrical platform, the diameter of the upper circle is 12mm, and the diameter of the lower circle is 8mm. The components and weight percentages of the matrix and the inlay are shown in Table 3.

[0049] table 3

[0050]

[0051] WC described in this example P / High manganese steel matrix composite wear-resistant liner and preparation method thereof, specifically comprising the following steps:

[0052] (1) Powder metallurgy: Mix spherical WC particles with a volume fraction of 30% and high manganese steel powder with a volume fraction of 70% through a ball mill, mill for 2.5 hours, put the ball-milled powder into a specific mold, and shape it through a p...

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Abstract

The invention discloses a WCp / high manganese steel-based composite wear-resisting lining plate and a preparation method thereof and belongs to the field of composite materials. The WCp / high manganesesteel-based composite wear-resisting lining plate comprises inlaid bodies and a base body; the inlaid bodies are each made of a WCp / high manganese steel composite material, and the base body is made of Bema multi-phase steel; corresponding space structures are formed between the inlaid bodies in a spliced mode; the inlaid bodies are prepared through a powder metallurgy method, and the corresponding space structures are formed between the inlaid bodies in the spliced mode; a WCp / high manganese steel-based composite wear-resisting lining plate rough blank with the space structures is obtained through conventional sand mold or lost foam casting and subsequent heat treatment, and finally, the rough blank is subjected to hot isostatic pressing densification treatment, and then the WCp / high manganese steel-based composite wear-resisting lining plate with excellent properties and the space structures can be obtained. According to the preparation method, the defects of air holes, shrinkage cavities and the like generated by casting are quite effectively overcome, meanwhile the advantages of material are promoted through the certain space structures, the impact resistance and wear resistance of the lining plate are improved, and the limiting plate is suitable for bearing high, middle and low different impact loads.

Description

technical field [0001] The invention discloses a WC P A high-manganese steel-based composite wear-resistant liner and a preparation method thereof belong to the field of composite materials. Background technique [0002] With the development of my country's metallurgical industry, ball mills used in mining, metallurgy, cement and other industries are developing towards large scale. The lining plate protecting the ball mill cylinder must have good wear resistance and good toughness to adapt Impact force under more complex working conditions. At present, the domestic liners are mostly made of single materials such as high manganese steel and low alloy wear-resistant steel, which cannot meet a wide range of impact loads under actual working conditions, and their service life is greatly reduced. When the high-manganese steel is not used in a high-impact state, it is applied in the condition that the hard layer cannot be formed on the ball mill, it cannot be completely work-hard...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D19/16B22F7/08B22F3/15C21D1/30C22C38/04C22C38/02
CPCB22D19/16B22F3/15B22F7/08C21D1/30C21D2211/002C21D2211/008C22C38/02C22C38/04
Inventor 李祖来张亚峰山泉颜哲张飞
Owner KUNMING UNIV OF SCI & TECH
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