Steel glue composite lining plate and preparation process thereof

Abstract

The invention relates to the technical field of steel-glue composite lining plates, in particular to a steel-glue composite lining plate and a preparation technology thereof.The preparation technology comprises the steps that a steel lining plate with a connecting groove is installed in a mold; heating the composite rubber material to soften the composite rubber material, squeezing the viscous composite rubber material into a mold, cooling, demolding and trimming to obtain an initial lining plate; and carrying out high-temperature vulcanization treatment on the initial lining plate to obtain the steel-rubber composite lining plate. The connecting grooves are formed in the steel base body, and the rubber layer is formed on the surface of the steel base body in a direct squeezing mode, so that the overall quality of the steel-rubber composite lining plate is improved; specifically, the binding force of the steel base body and the rubber layer is improved through the design that the connecting groove is narrow in top and wide in bottom; the steel matrix is subjected to heat treatment and nitriding treatment, the toughness and hardness of the steel matrix can be improved, the modified carbon fibers are added into the rubber material, the wear resistance and strength of the rubber layer are improved, and therefore the quality of the formed steel-rubber composite lining plate is improved.

Description

Technical Field

[0001] The invention relates to the technical field of steel-rubber composite lining plates, and in particular to a steel-rubber composite lining plate and a preparation process thereof. Background Art

[0002] Steel-rubber composite lining is a new type of material made of steel and rubber. It has excellent wear resistance, corrosion resistance and impact resistance. It is widely used in wear occasions in mining, power, steel, chemical and other industries. Ball mill steel-rubber composite lining is made of steel skeleton or alloy steel as the internal skeleton and high wear-resistant rubber as the external skeleton. The advantage of this is that the external rubber layer retains the wear resistance, while the internal steel skeleton or alloy steel skeleton greatly improves the impact resistance and impact resistance of the rubber lining.

[0003] The existing steel-rubber composite liner has the problem of rapid wear of the rubber layer, which shortens the service life of the steel-rubber composite liner; moreover, the bonding force between the steel skeleton and the rubber layer is weak, which also affects the quality of the steel-rubber composite liner. Based on this, a steel-rubber composite liner and its preparation process are proposed. Summary of the invention

[0004] In order to address the deficiencies in the prior art, the present invention provides a steel-rubber composite lining and a preparation process thereof, wherein a connecting groove is opened on a steel substrate and a rubber layer is formed on its surface by direct extrusion, thereby improving the overall quality of the steel-rubber composite lining.

[0005] To achieve the above objectives, the present invention provides the following technical solutions: a steel-rubber composite lining, comprising a steel lining, a connecting groove opened on the surface of the steel lining, and a rubber layer laid on the surface of the steel lining and in the connecting groove.

[0006] Preferably, the connecting groove is composed of a long connecting groove and a short connecting groove, the short connecting grooves are spaced apart on both sides of the long connecting groove, and the connecting groove is narrow at the top and wide at the bottom.

[0007] Preferably, the steel lining is prepared as follows: S1-1, putting the alloy raw materials into a furnace for melting, and after modification and refining treatment, skimming off the slag to obtain purified molten steel; S1-2, injecting the purified molten steel into a mold, cooling, demolding, and opening a connecting groove to obtain a steel matrix; S1-3, sequentially performing heat treatment and nitriding treatment on the steel matrix to obtain a steel lining.

[0008] Preferably, in step S1-1, the purified molten steel comprises the following components, in mass percentage: C 2.6-3.5%, Si 0.3-1.0%, Mn 0.3-1.0%, Cr 15-25%, Mo 0.1-1.0%, Ni 0.1-1.0%, Cu 0.1-1.2%, Ce or Y 0.8-1.5%, P≤0.05%, S≤0.035%, and the balance is Fe.

[0009] Preferably, in step S1-3, the heat treatment is performed by heating the temperature to 420-450°C at a rate of 40-50°C, and after keeping the temperature for 2-3 hours, the temperature is further increased to 820-840°C at a rate of 30-40°C.

[0010] Preferably, the nitriding treatment is to send the heat-treated steel substrate into a plasma nitriding furnace, during which the nitriding temperature is controlled to be 450°C, the nitriding time is 2.5h, the nitrogen flow rate is 0.1L / min, and the hydrogen flow rate is 0.3L / min.

[0011] Preferably, the rubber layer is made of a composite rubber material, and the composite rubber material is prepared as follows: nitrile rubber, butadiene rubber, modified carbon fiber, sulfur, carbon black, stearic acid and zinc oxide are put into an internal mixer, and mixed at 80-90° C. for 50-70 minutes to obtain the composite rubber material.

[0012] Preferably, the raw materials of the composite rubber material are as follows: 40-50 parts by weight of nitrile rubber, 30-40 parts of butadiene rubber, 15-25 parts of modified carbon fiber, 1-1.5 parts of sulfur, 10-15 parts of carbon black, 0.5-1 parts of stearic acid and 5-8 parts of zinc oxide.

[0013] Preferably, the modified carbon fiber is prepared as follows: S2-1, installing the long carbon fiber on a hanger, and treating it with ozone at a flow rate of 100 mL / min for 6.5 minutes to obtain pretreated long carbon fiber; S2-2, dissolving tetraethyl orthosilicate in anhydrous ethanol at a solid-liquid ratio of 1:10 g / ml, hanging the pretreated long carbon fiber into the obtained solution, adjusting the pH of the solution to 8.5 with ammonia water, and reacting at 60°C for 10 hours to obtain reinforced long carbon fiber; S2-3, hanging out the reinforced long carbon fiber and drying it, and then chopping it to obtain modified carbon fiber.

[0014] The present invention also provides a preparation process of a steel-rubber composite liner, comprising the following steps:

[0015] (1) Install the steel liner with the connection groove into the mold;

[0016] (2) heating the composite rubber material to soften it, extruding the viscous composite rubber material into the mold, and obtaining the initial lining plate after cooling, demolding, and trimming;

[0017] (3) The initial lining is subjected to high temperature vulcanization treatment to obtain a steel-rubber composite lining.

[0018] The present invention provides a steel-rubber composite lining plate and a preparation process thereof, which has the following beneficial effects compared with the prior art:

[0019] The present invention opens a connecting groove on a steel substrate, and forms a rubber layer on its surface by direct extrusion, thereby improving the overall quality of the steel-rubber composite lining; specifically, the design of the connecting groove being narrow at the top and wide at the bottom improves the bonding strength between the steel substrate and the rubber layer; the steel substrate is subjected to heat treatment and nitriding treatment to improve the toughness and hardness of the steel substrate, and modified carbon fiber is added to the rubber material to improve the wear resistance and strength of the rubber layer, thereby improving the quality of the formed steel-rubber composite lining.

[0020] The present invention performs ozone etching treatment on carbon fiber, thereby increasing the number of oxygen-containing functional groups on the surface of the carbon fiber and the surface roughness, and better in-situ depositing micro-nano silicon dioxide on the surface, which is beneficial to improving the wear resistance and strength of the carbon fiber, as well as the bonding between the carbon fiber and the rubber matrix, thereby enhancing the quality of the rubber layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0022] Figure 1 This is a cross-sectional view of the steel-rubber composite liner structure of the present invention;

[0023] Figure 2 It is a schematic diagram of the steel liner and connecting groove structure of the present invention. DETAILED DESCRIPTION

[0024] The following examples are used to explain the implementation methods of the present application in detail, so that the implementation process of how the present application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0025] Example 1

[0026] A steel-rubber composite lining includes a steel lining, a connection groove opened on the surface of the steel lining, and a rubber layer laid on the surface of the steel lining and in the connection groove. The connection groove is composed of a long connection groove and a short connection groove, the short connection grooves are spaced and distributed on both sides of the long connection groove, and the connection groove is narrow at the top and wide at the bottom, so that the rubber layer is partially embedded in the connection groove, thereby increasing the connection stability between the rubber layer and the steel lining.

[0027] Example 2

[0028] The modified carbon fiber was prepared as follows: long carbon fibers were mounted on a hanger and treated with ozone at a flow rate of 100 mL / min for 6.5 min to obtain pretreated long carbon fibers; ethyl orthosilicate was dissolved in anhydrous ethanol at a solid-liquid ratio of 1:10 g / ml, the pretreated long carbon fibers were hung into the obtained solution, the pH of the solution was adjusted to 8.5 with ammonia water, and the solution was reacted at 60°C for 10 h to obtain reinforced long carbon fibers; the reinforced long carbon fibers were hung out and dried, and then chopped to obtain modified carbon fibers.

[0029] Example 3

[0030] A preparation process of a steel-rubber composite liner comprises the following steps:

[0031] (1) Install the steel liner with the connection groove into the mold;

[0032] (2) heating the composite rubber material to soften it, extruding the viscous composite rubber material into the mold, and obtaining the initial lining plate after cooling, demolding, and trimming;

[0033] (3) The initial lining is subjected to high temperature vulcanization treatment to form a rubber layer to obtain a steel-rubber composite lining.

[0034] The above steel lining is prepared as follows: the alloy raw material is put into a furnace for melting, and after being subjected to modification and refining treatment, the slag is skimmed off to obtain purified molten steel; the purified molten steel includes the following components: C 3.5%, Si 0.3%, Mn 1.0%, Cr 15%, Mo1.0%, Ni 0.1%, Cu 1.2%, Ce 0.8%, P≤0.05%, S≤0.035%, and the balance is Fe; the purified molten steel is injected into the mold, and after cooling, demoulding, and opening the connecting groove, a steel matrix is ​​obtained; the steel matrix is ​​heated to 420°C at a rate of 50°C, and after keeping warm for 3h, the temperature is further heated to 840°C at a rate of 30°C; the heat-treated steel matrix is ​​then sent to a plasma nitriding furnace, the nitriding temperature is controlled to 450°C, the nitriding time is 2.5h, the nitrogen flow rate is 0.1L / min, and the hydrogen flow rate is 0.3L / min, and finally a steel lining plate is obtained, and the surface hardness of the steel lining plate is 62.5HRC.

[0035] The rubber layer is made of a composite rubber material. The composite rubber material is prepared as follows, by weight: 40 parts of nitrile rubber, 40 parts of butadiene rubber, 15 parts of modified carbon fiber in Example 1, 1.5 parts of sulfur, 10 parts of carbon black, 1 part of stearic acid and 8 parts of zinc oxide are put into an internal mixer and mixed at 90°C for 50 minutes to obtain a composite rubber material.

[0036] Example 4

[0037] A preparation process of a steel-rubber composite liner comprises the following steps:

[0038] (1) Install the steel liner with the connection groove into the mold;

[0039] (2) heating the composite rubber material to soften it, extruding the viscous composite rubber material into the mold, and obtaining the initial lining plate after cooling, demolding, and trimming;

[0040] (3) The initial lining is subjected to high temperature vulcanization treatment to form a rubber layer to obtain a steel-rubber composite lining.

[0041] The above steel lining is prepared as follows: the alloy raw material is put into a furnace for melting, and after being subjected to modification and refining treatment, the slag is skimmed off to obtain purified molten steel; the purified molten steel includes the following components: C 2.6%, Si 1.0%, Mn 0.3%, Cr 25%, Mo0.1%, Ni 1.0%, Cu 0.12%, Y 1.5%, P≤0.05%, S≤0.035%, and the balance is Fe; the purified molten steel is injected into the mold, and after cooling, demoulding, and opening the connecting groove, a steel matrix is ​​obtained; the steel matrix is ​​heated to 450°C at a rate of 40°C, and after keeping warm for 2h, the temperature is further heated to 820°C at a rate of 40°C; the heat-treated steel matrix is ​​then sent to a plasma nitriding furnace, the nitriding temperature is controlled to 450°C, the nitriding time is controlled to 2.5h, the nitrogen flow rate is 0.1L / min, and the hydrogen flow rate is 0.3L / min, and finally a steel lining plate is obtained, and the surface hardness of the steel lining plate is 61.8HRC.

[0042] The rubber layer is made of a composite rubber material. The composite rubber material is prepared as follows, by weight: 50 parts of nitrile rubber, 30 parts of butadiene rubber, 25 parts of modified carbon fiber in Example 1, 1 part of sulfur, 15 parts of carbon black, 0.5 parts of stearic acid and 5 parts of zinc oxide are put into an internal mixer and mixed at 80°C for 70 minutes to obtain a composite rubber material.

[0043] Example 5

[0044] A preparation process of a steel-rubber composite liner comprises the following steps:

[0045] (1) Install the steel liner with the connection groove into the mold;

[0046] (2) heating the composite rubber material to soften it, extruding the viscous composite rubber material into the mold, and obtaining the initial lining plate after cooling, demolding, and trimming;

[0047] (3) The initial lining is subjected to high temperature vulcanization treatment to form a rubber layer to obtain a steel-rubber composite lining.

[0048] The above steel lining is prepared as follows: the alloy raw material is put into a furnace for melting, and after being subjected to modification and refining treatment, the slag is skimmed off to obtain purified molten steel; the purified molten steel comprises the following components: C 3.0%, Si 0.5%, Mn 0.6%, Cr 20%, Mo0.8%, Ni 0.6%, Cu 1.0%, Y 1.2%, P≤0.05%, S≤0.035%, and the balance is Fe; the purified molten steel is injected into the mold, and after cooling, demoulding, and opening the connecting groove, a steel matrix is ​​obtained; the steel matrix is ​​heated to 430°C at a rate of 45°C, and after keeping warm for 2.5h, it is further heated to 825°C at a rate of 35°C; the heat-treated steel matrix is ​​then sent to a plasma nitriding furnace, the nitriding temperature is controlled to 450°C, the nitriding time is 2.5h, the nitrogen flow rate is 0.1L / min, and the hydrogen flow rate is 0.3L / min, and finally a steel lining plate is obtained, and the surface hardness of the steel lining plate is 63.3HRC.

[0049] The rubber layer is made of a composite rubber material. The composite rubber material is prepared as follows, by weight: 45 parts of nitrile rubber, 35 parts of butadiene rubber, 20 parts of modified carbon fiber in Example 1, 1.2 parts of sulfur, 12 parts of carbon black, 0.6 parts of stearic acid and 6 parts of zinc oxide are put into an internal mixer and mixed at 85°C for 60 minutes to obtain a composite rubber material.

[0050] Comparative Example 1

[0051] A preparation process of a steel-rubber composite liner is basically the same as that of Example 5, except that:

[0052] The preparation of the steel lining is as follows: the alloy raw material is put into a furnace for melting, and after being subjected to modification and refining treatment, the slag is skimmed off to obtain purified molten steel; the purified molten steel includes the following components: C 3.0%, Si 0.5%, Mn 0.6%, Cr 20%, Mo 0.8%, Ni 0.6%, Cu 1.0%, Y 1.2%, P≤0.05%, S≤0.035%, and the balance is Fe; the purified molten steel is injected into a mold, and after cooling, demolding, and opening a connecting groove, a steel matrix is ​​obtained; the steel matrix is ​​heated to 430°C at a rate of 45°C, and after being kept warm for 2.5 hours, the temperature is further increased to 825°C at a rate of 35°C, and then air-cooled to room temperature, and finally a steel lining is obtained, and the surface hardness of the steel lining is 52.4HRC.

[0053] Comparative Example 2

[0054] A preparation process of a steel-rubber composite liner is basically the same as that of Example 5, except that:

[0055] The modified carbon fiber is prepared as follows: long carbon fibers are mounted on a hanger and treated with ozone at a flow rate of 100 mL / min for 6.5 min to obtain pretreated long carbon fibers; ethyl orthosilicate is dissolved in anhydrous ethanol at a solid-liquid ratio of 1:10 g / ml, the pretreated long carbon fibers are hung into the obtained solution, the pH of the solution is adjusted to 8.5 with ammonia water, and the solution is reacted at 60°C for 10 h to obtain reinforced long carbon fibers; the reinforced long carbon fibers are hung out and dried, and then chopped to obtain modified carbon fibers.

[0056] Comparative Example 3

[0057] A preparation process of a steel-rubber composite liner is basically the same as that of Example 5, except that:

[0058] The preparation of modified carbon fiber is as follows: long carbon fiber is installed on a hanger; ethyl orthosilicate is dissolved in anhydrous ethanol at a material-liquid ratio of 1:10 g / ml, long carbon fiber is hung into the obtained solution, pH of the solution is adjusted to 8.5 with ammonia water, and the solution is reacted at 60°C for 10 hours to obtain reinforced long carbon fiber; the reinforced long carbon fiber is hung out and dried, and then it is chopped to obtain modified carbon fiber.

[0059] Comparative Example 4

[0060] A preparation process of a steel-rubber composite liner comprises the following steps:

[0061] (1) Install the steel liner into the mold;

[0062] (2) heating the composite rubber material to soften it, extruding the viscous composite rubber material into the mold, and obtaining the initial lining plate after cooling, demolding, and trimming;

[0063] (3) The initial lining is subjected to high temperature vulcanization treatment to form a rubber layer to obtain a steel-rubber composite lining.

[0064] The preparation of the above-mentioned steel lining is as follows: the alloy raw material is put into a furnace for melting, and after being subjected to modification and refining treatment, the slag is skimmed off to obtain purified molten steel; the purified molten steel includes the following components: C 3.0%, Si 0.5%, Mn 0.6%, Cr 20%, Mo0.8%, Ni 0.6%, Cu 1.0%, Y 1.2%, P≤0.05%, S≤0.035%, and the balance is Fe; the purified molten steel is injected into a mold, and after cooling and demolding, a steel matrix is ​​obtained; the steel matrix is ​​heated to 430°C at a rate of 45°C, and after being kept warm for 2.5 hours, the temperature is further heated to 825°C at a rate of 35°C; the heat-treated steel matrix is ​​then sent to a plasma nitriding furnace, and the nitriding temperature is controlled to be 450°C, the nitriding time is controlled to be 2.5 hours, the flow rate of nitrogen is controlled to be 0.1L / min, and the flow rate of hydrogen is controlled to be 0.3L / min, and finally a steel lining is obtained.

[0065] The rubber layer is made of a composite rubber material. The composite rubber material is prepared as follows, by weight: 45 parts of nitrile rubber, 35 parts of butadiene rubber, 20 parts of modified carbon fiber in Example 1, 1.2 parts of sulfur, 12 parts of carbon black, 0.6 parts of stearic acid and 6 parts of zinc oxide are put into an internal mixer and mixed at 85°C for 60 minutes to obtain a composite rubber material.

[0066] Quality Inspection

[0067] The steel-rubber composite linings prepared by the methods of Examples 3-5 and Comparative Examples 1-4 were used as test samples, with a specification of 430×430×11 mm (wherein the thickness of the steel substrate is 6 mm, the thickness of the rubber layer is 5 mm, and the total thickness is 11 mm), and the test was performed. The specific results are shown in the following table.

[0068] Table 1 Performance of steel-rubber composite lining

[0069]

[0070] It can be seen from the above table that the tearing strength, rubber layer wear loss, and peel strength of the steel-rubber composite lining in Comparative Examples 1-4 are not as good as those in Example 5 in one or more aspects, indicating that the overall quality of the steel-rubber composite lining can be improved by modifying the carbon fiber, nitriding the steel lining, and setting the connecting groove.

[0071] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A steel-rubber composite lining, characterized in that: It includes a steel lining, a connecting groove opened on the surface of the steel lining, and a rubber layer laid on the surface of the steel lining and in the connecting groove.

2. The steel-rubber composite lining according to claim 1 is characterized in that: The connecting groove is composed of a long connecting groove and a short connecting groove, and the short connecting grooves are distributed at intervals on both sides of the long connecting groove; and the connecting groove is narrow at the top and wide at the bottom.

3. The steel-rubber composite liner according to claim 1, characterized in that: The steel liner is prepared as follows: S1-1, putting the alloy raw materials into a furnace for melting, undergoing modification and refining treatment, and skimming off the scum to obtain purified molten steel; S1-2, injecting purified molten steel into the mold, cooling, demoulding, and opening connecting grooves to obtain a steel matrix; S1-3. The steel substrate is subjected to heat treatment and nitriding treatment in sequence to obtain a steel lining.

4. The steel-rubber composite liner according to claim 3 is characterized in that: In step S1-1, the purified molten steel includes the following components, measured by mass percentage: C 2.6-3.5%, Si 0.3-1.0%, Mn0.3-1.0%, Cr 15-25%, Mo0.1-1.0%, Ni 0.1-1.0%, Cu 0.1-1.2%, Ce or Y 0.8-1.5%, P≤0.05%, S≤0.035%, and the balance is Fe.

5. The steel-rubber composite lining according to claim 3 is characterized in that: In step S1-3, the heat treatment is performed by heating the temperature to 420-450°C at a rate of 40-50°C, and after keeping the temperature for 2-3 hours, the temperature is further raised to 820-840°C at a rate of 30-40°C.

6. The steel-rubber composite liner according to claim 3, characterized in that: The nitriding treatment is to send the heat-treated steel substrate into a plasma nitriding furnace, during which the nitriding temperature is controlled to be 450° C., the nitriding time is 2.5 hours, the nitrogen flow rate is 0.1 L / min, and the hydrogen flow rate is 0.3 L / min.

7. The steel-rubber composite liner according to claim 1, characterized in that: The rubber layer is made of composite rubber material, and the composite rubber material is prepared as follows: nitrile rubber, butadiene rubber, modified carbon fiber, sulfur, carbon black, stearic acid and zinc oxide are put into an internal mixer, and mixed at 80-90° C. for 50-70 minutes to obtain the composite rubber material.

8. The steel-rubber composite liner according to claim 7, characterized in that: The raw materials of the composite rubber material are as follows: 40-50 parts by weight of nitrile rubber, 30-40 parts by weight of butadiene rubber, 15-25 parts by weight of modified carbon fiber, 1-1.5 parts by weight of sulfur, 10-15 parts by weight of carbon black, 0.5-1 parts by weight of stearic acid and 5-8 parts by weight of zinc oxide.

9. The steel-rubber composite liner according to claim 7, characterized in that: The modified carbon fiber is prepared as follows: S2-1, mounting the long carbon fiber on a hanger, and subjecting the long carbon fiber to ozone treatment at a flow rate of 100 mL / min for 6.5 min to obtain a pretreated long carbon fiber; S2-2, dissolving tetraethyl orthosilicate in anhydrous ethanol at a material-liquid ratio of 1:10 g / ml, hanging the pretreated long carbon fiber into the obtained solution, adjusting the pH of the solution to 8.5 with ammonia water, and reacting at 60° C. for 10 hours to obtain reinforced long carbon fiber; S2-3, lifting out the reinforced long carbon fiber and drying it, and then chopping it to obtain modified carbon fiber.

10. The process for preparing the steel-rubber composite liner according to claim 7, characterized in that: The following steps are involved: (1) Install the steel liner with the connection groove into the mold; (2) heating the composite rubber material to soften it, extruding the viscous composite rubber material into the mold, and obtaining the initial lining plate after cooling, demolding, and trimming; (3) The initial lining is subjected to high temperature vulcanization treatment to obtain a steel-rubber composite lining.

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