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Preparation method of double-liquid bimetal composite wear-resistant lining board

A composite wear-resistant lining plate and dual-liquid bimetal technology, which is applied in the preparation of wear-resistant lining plates and the preparation of dual-liquid bimetallic composite wear-resistant lining plates, can solve the problem of poor combination of composite layers, high production cost, complicated operation, etc. problem, to achieve the effect of good composite layer combination, high production efficiency and simple preparation process

Inactive Publication Date: 2013-02-13
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Although a variety of composite liner manufacturing processes have been developed at home and abroad, the above-mentioned processes may have complex operations, high production costs, or poor bonding of the composite layers, and the liner is prone to delamination, cracking, and peeling during use.

Method used

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  • Preparation method of double-liquid bimetal composite wear-resistant lining board

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Experimental program
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Effect test

Embodiment 1

[0019] The specific preparation process of the double-liquid bimetallic composite wear-resistant liner is:

[0020] 1) Melt high-strength and tough cast steel 5 and high-hardness, high-chromium wear-resistant white cast iron 3 in 500 kg and 1000 kg intermediate frequency induction furnaces respectively, and then pour the two liquid metals into the same casting system through their respective pouring systems. In type 2, a bimetallic composite wear-resistant liner is obtained.

[0021] Among them, the specific composition and mass fraction % of high strength and toughness cast steel 5 are 0.29C, 0.54Si, 0.53Mn, 0.45Cr, 0.04Ce, 0.05La, 0.017S, 0.024P, and the balance is Fe.

[0022] During the pouring process of the bimetallic composite wear-resistant liner, the high-strength and tough cast steel 5 is first poured into the mold 2, the pouring temperature of the molten steel is 1522°C, and after 75% to 85% of the molten steel is poured, the protective agent is mixed with the remai...

Embodiment 2

[0025] The specific preparation process of the double-liquid bimetallic composite wear-resistant liner is:

[0026] 1) Melt high-strength and tough cast steel 5 and high-hardness nickel-hard wear-resistant white cast iron 3 in 500 kg and 1000 kg intermediate frequency induction furnaces respectively, and then pour the two liquid metals into the same casting system through their respective pouring systems. In type 2, a bimetallic composite wear-resistant liner is obtained.

[0027] Among them, the specific composition and mass fraction % of high strength and toughness cast steel 5 are 0.42C, 0.27Si, 0.84Mn, 0.31Cr, 0.06Ce, 0.03La, 0.012S, 0.030P, and the balance is Fe.

[0028] During the pouring process of the bimetallic composite wear-resistant liner, high-strength and tough cast steel 5 is first poured into the mold 2, the molten steel pouring temperature is 1549°C, and after 75% to 85% of the molten steel is poured, the protective agent is mixed with the remaining 25% to 15...

Embodiment 3

[0031] The specific preparation process of the double-liquid bimetallic composite wear-resistant liner is:

[0032] 1) Melt high-strength and tough cast steel 5 and high-hardness, high-boron, wear-resistant white cast iron 3 in 500 kg and 1000 kg intermediate frequency induction furnaces respectively, and then pour the two liquid metals into the same casting system through their respective pouring systems. In type 2, a bimetallic composite wear-resistant liner is obtained.

[0033] Among them, the specific composition and mass fraction % of high strength and toughness cast steel 5 are 0.34C, 0.41Si, 0.68Mn, 0.39Cr, 0.04Ce, 0.04La, 0.021S, 0.029P, and the balance is Fe.

[0034] During the pouring process of the bimetallic composite wear-resistant liner, high-strength and tough cast steel 5 is first poured into the mold 2, the molten steel pouring temperature is 1536°C, and after 75% to 85% of the molten steel is poured, the protective agent is mixed with the remaining 25% to 1...

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Abstract

The invention relates to a preparation method of a double-liquid bimetal composite wear-resistant lining board and belongs to the technical field of casting. The preparation method comprises the following steps: smelting high-toughness cast steel and high-hardness wear-resistant cast iron in an electric furnace and then successively pouring the two types of liquid metals into the same casting mold through respective pouring systems to obtain a bimetal composite wear-resistant lining board; pouring a protective agent into the casting mold together with 15-25 of residual molten steel after 75-85 percent of molten steel is poured; and adding a stream inoculation agent, of which the mass is 2.0-2.5 percent of that of molten iron in the pouring process of the molten iron; and destressing the composite lining board, controlling the destressing temperature within 230-320 DEG C and the heat insulation time within 8-10 hours, and then cooling air to a room temperature to obtain the double-liquid bimetal composite wear-resistant lining board. The double-liquid bimetal composite wear-resistant lining board has the advantages of good wear resistance and safety and reliability in use.

Description

technical field [0001] The invention discloses a preparation method of a wear-resistant liner, in particular relates to a preparation method of a double-liquid bimetal composite wear-resistant liner, which belongs to the technical field of casting. Background technique [0002] The high manganese steel liner has good toughness and the surface can be work hardened. However, when this material is used to manufacture ball mill liners, it is easy to produce plastic deformation, cut off the fixing bolts, and cause collapse accidents. Moreover, due to the insignificant surface work hardening during use, the anti-wear potential of high manganese steel cannot be exerted. As a replacement product of high manganese steel lining plate, medium carbon and medium chromium multi-element alloy steel lining plate, its matrix structure is mainly martensite, with high initial hardness, but the content of high hardness carbide is small, and its wear resistance It is still limited, and the serv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D19/16B22D1/00C22C38/18C22C38/14
Inventor 符寒光李家荣
Owner BEIJING UNIV OF TECH