Bimetal composite type abrasion-resistant liner plate and manufacturing method

A technology of wear-resistant liner and manufacturing method, which is applied in the field of machinery and mechanical parts of coal-fired thermal power stations, can solve the problems of high production cost, small crack tendency, plastic deformation, etc., and achieve low production cost and simple and ingenious structure Effect

Inactive Publication Date: 2016-04-06
HUNAN DATANG ENERGY SAVING SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the commonly used metal liner materials for coal mills in my country mainly include the following four categories: (1) High manganese steel liner: the initial hardness is only HB179-229, and after testing, the hardness after wear is only HB240-350; this shows that In the process of use (especially on small and medium-sized mills), the work hardening effect has not been fully achieved, and its impact and wear resistance have not been fully exerted; at the same time, its yield strength is low, and it is easy to produce plastic deformation, which makes the liner Protrusion, in severe cases will break the mounting bolts, making disassembly difficult
(2) Medium and high carbon alloy steel liners: Due to the limitations of high manganese steel used as mill liners, various medium and high carbon steels have emerged; in terms of chemical composition, among these steels All contain a certain amount of Cr and Mo, and some also contain relatively high Si and Mn. After heat treatment, the structure can be tempered martensite or pearlite and a small amount of carbide; ak is 30 ~ 40J/cm2, HRC is 50-55, the wear resistance of pearlitic steel is slightly worse, but it has a small tendency to crack during casting or use; it contains less alloying elements, low cost, and has better toughness than white iron, and high manganese steel Ratio, high initial hardness, high strength, strong production adaptability, but not high wear resistance
(3) High chromium cast iron (steel) liner: this type of cast iron (steel) is

Method used

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specific Embodiment approach 1

[0049] The present invention will be described in detail below in conjunction with the accompanying drawings. As shown in the accompanying drawings:

[0050] A bimetal composite wear-resistant liner, which is composed of an intermediate steel plate 1, a high-chromium iron casting 2, and a carbon steel casting 3;

[0051] The bimetal composite wear-resistant liner, one side of the middle steel plate 1 and the high chromium cast iron casting 2 formed after solidification of the high chromium cast iron lava The carbon steel castings 3 formed after the slurry is solidified are all connected by casting.

[0052] For the bimetallic composite wear-resistant liner, the middle steel plate 1 and the carbon steel casting 3 are plate-shaped structures provided with bolt holes, and the high-chromium iron casting 2 is provided with bolt counterbores and sawtooth A plate-shaped structure with convex teeth.

[0053] A method for manufacturing a bimetal composite wear-resistant liner, the man...

specific Embodiment approach 2

[0066] Carry out according to specific embodiment one. As attached to the manual figure 1 , 2 , 3, and 4 show:

[0067] A bimetal composite wear-resistant liner, which is composed of an intermediate steel plate 1, a high-chromium iron casting 2, and a carbon steel casting 3;

[0068] The bimetal composite wear-resistant liner, one side of the middle steel plate 1 and the high chromium cast iron casting 2 formed after solidification of the high chromium cast iron lava The carbon steel castings 3 formed after the slurry is solidified are all connected by casting.

[0069] For the bimetallic composite wear-resistant liner, the middle steel plate 1 and the carbon steel casting 3 are plate-shaped structures provided with bolt holes, and the high-chromium iron casting 2 is provided with bolt counterbores and sawtooth A plate-shaped structure with convex teeth.

[0070] A bimetal composite wear-resistant liner was produced.

specific Embodiment approach 3

[0071] Carry out according to specific embodiment one. As attached to the manual Figure 5 Shown:

[0072] A method for manufacturing a bimetal composite wear-resistant liner, the manufacturing steps are as follows:

[0073] 1. Fabrication of lining plate casting model: on one side of the middle steel plate 1, the high-chromium iron casting 2 model made of polystyrene foam board is bonded with lost foam cold glue, and on the other side of the middle steel plate 1, it is bonded with lost foam cold glue The carbon steel casting 3 model made of polystyrene foam board, the high chromium iron casting 2 model, the middle steel plate 1, and the carbon steel casting 3 model together constitute the lining plate model; brush the surface of the lining plate model more than 3 times with a thickness of After the 1.5-2.5mm lost foam coating is dried at 40-50°C; place the dried liner model in a sandbox, fill it with sand and vibrate it, cover it with a plastic film, and then add a layer ...

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Abstract

The invention provides a bimetal composite type abrasion-resistant liner plate and a manufacturing method, and relates to the technical field of instruments. The key technology of 'bimetal composite' is adopted, one face of a middle steel plate of the bimetal composite type abrasion-resistant liner plate is connected with a high-chromium iron casting containing a metamorphic complex agent in a casting mode, and the other face of the middle steel plate of the bimetal composite type abrasion-resistant liner plate is connected with a carbon steel casting in a casting mode. The manufacturing method for the bimetal composite type abrasion-resistant liner plate comprises the steps that 1, a high-chromium iron casting model in a liner plate casting model is casted through high-chromium cast iron molten lava containing the metamorphic complex agent, a carbon steel casting model in the liner plate casting model is casted through carbon steel molten lava at the same time, and manufactured rough casting bodies are combined into a casting; 2, the casting is made into a quenching casting through air cooling and quenching; and 3, the quenching casting is made into the bimetal composite type abrasion-resistant liner plate through tempering. The bimetal composite type abrasion-resistant liner plate is applied to a ball mill and is skillful in structure, simple in manufacturing method, stable and reliable in effect, easy to manufacture and low in cost.

Description

technical field [0001] The invention relates to a bimetallic composite wear-resistant liner and a manufacturing method, and relates to the technical field of machinery; in particular, it relates to the technical field of mechanical components of coal-fired thermal power stations; in particular, it relates to the technical field of a bimetallic composite wear-resistant lining and a manufacturing method. Background technique [0002] As far as the ball mills used in coal-fired power plant boilers are concerned, they are classified according to the ratio of cylinder length to diameter: ①. Short mills; ②. Medium-long mills; ③Long mills. The barrel of the ball mill is one of the main working parts, and the material to be ground is ground into fine powder by the impact and grinding action of the grinding body in the barrel. The key component that is fixed on the inner wall of the coal mill cylinder and the end and plays a grinding role is the liner. The lining boards are classifi...

Claims

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Application Information

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IPC IPC(8): B02C17/22B22D19/16B22D19/08C22C37/10
CPCB02C17/22B22D19/085B22D19/16C22C37/06C22C37/08C22C37/10
Inventor 邓伟力冯伟陈俊夫邓耀华刘良华
Owner HUNAN DATANG ENERGY SAVING SCI & TECH CO LTD
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