High-temperature-friction-wear-resistant roller press side guide plate and preparation method thereof

Abstract

The invention relates to the technical field of metallurgical materials, and provides a high-temperature-friction-wear-resistant roller press side guide plate and a preparation method thereof.The high-temperature-friction-wear-resistant roller press side guide plate is composed of an iron matrix and a reinforcing phase, and the iron matrix is composed of, by weight, 10%-15% of Cr, 3%-5% of Ni, 5%-6% of Ti, 1%-3% of Mo, 0.5%-1.5% of B, 0.1%-0.3% of Mn, 5%-8% of Co and the balance Fe and inevitable impurities; the reinforcing phase is modified vanadium carbide, a modifier of the modified vanadium carbide comprises magnesium borate whiskers and silicide, and the mass ratio of the modifier to the vanadium carbide is (1-2): 20. According to the technical scheme, the problems of poor temperature resistance and poor wear resistance of the side guide plate of the roller press in the prior art are solved.

Description

Technical Field

[0001] The invention relates to the technical field of metallurgical materials, and in particular to a side guide plate of a high-temperature friction and wear-resistant roller press and a preparation method thereof. Background Art

[0002] In modern industrial production, roller presses, as an important crushing equipment, are widely used in cement, mining, metallurgy and other industries. With the continuous development of industrial technology, the performance requirements for roller presses are getting higher and higher.

[0003] During the operation of the roller press, the side guide plate plays a vital role. It not only has to bear the huge pressure from the material, but also has to withstand frequent friction and wear in a high temperature environment. Traditional side guide plate materials often cannot meet these harsh working conditions and are prone to problems such as severe wear and short life, which not only increases the maintenance cost of the equipment, but also affects production efficiency. Therefore, the development of a roller press side guide plate that is resistant to high temperature friction and wear has become an urgent need in the current industrial field. Summary of the invention

[0004] The invention provides a high-temperature friction and wear resistant roller press side guide plate and a preparation method thereof, which solves the problem of poor temperature resistance and poor wear resistance of the roller press side guide plate in the related art.

[0005] The technical solution of the present invention is as follows: The present invention provides a high temperature friction and wear resistant roller press side guide plate, which is composed of an iron matrix and a reinforcement phase. The iron matrix is ​​composed of the following components by weight percentage: Cr 10%~15%, Ni 3%~5%, Ti 5%~6%, Mo 1%~3%, B 0.5%~1.5%, Mn 0.1%~0.3%, Co 5%~8%, and the balance is Fe and inevitable impurities; The reinforcing phase is modified vanadium carbide, the modifier of the modified vanadium carbide includes magnesium borate whiskers and silicide, and the mass ratio of the modifier to the vanadium carbide is 1-2:20.

[0006] As a further technical solution, the mass ratio of the magnesium borate whiskers to the silicide is 2-3:3.

[0007] In the present invention, the mass ratio of magnesium borate whiskers and silicide is reasonably adjusted, and the interface bonding between vanadium carbide, magnesium borate whiskers and silicide is adjusted to obtain a roller press side guide plate with better temperature resistance and wear resistance.

[0008] As a further technical solution, the preparation of the modified vanadium carbide includes the following steps: mixing a modifier and vanadium carbide to obtain a mixture, and sintering, hot pressing and crushing the mixture to obtain the modified vanadium carbide.

[0009] As a further technical solution, the length of the magnesium borate whisker is 30-50 μm.

[0010] As a further technical solution, the silicide includes one or both of molybdenum silicide and tungsten silicide.

[0011] As a further technical solution, the mass ratio of the modified vanadium carbide to the iron matrix is ​​1-2:100.

[0012] The present invention also provides a method for preparing a high temperature friction and wear resistant roller press side guide plate, comprising the following steps: S1. According to the composition of the iron matrix, materials are prepared, molten steel is obtained after smelting, a reinforcing phase is added, and after uniform dispersion, a steel ingot is obtained by casting; S2. The steel ingot is rolled after being descaled to obtain a roller press side guide plate.

[0013] As a further technical solution, the smelting temperature is 1550~1650℃.

[0014] As a further technical solution, the casting temperature is 1500~1550℃.

[0015] As a further technical solution, the protective gas for smelting is argon.

[0016] The working principle and beneficial effects of the present invention are: In the present invention, vanadium carbide modified by magnesium borate whiskers and silicide is used as a reinforcing phase and added to an iron matrix to prepare a roller press side guide plate. The modified vanadium carbide has higher temperature resistance and wear resistance, can be more evenly dispersed in the iron matrix during the smelting process, is conducive to interface bonding, improves the bonding strength between the vanadium carbide and the iron matrix, and improves the overall temperature resistance and wear resistance of the side guide plate. DETAILED DESCRIPTION

[0017] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] In the following examples and comparative examples: Ferrochrome alloy: chromium content 75wt%, iron-nickel alloy: nickel content 80wt%, ferrotitanium alloy: titanium content 75wt%, ferromolybdenum alloy: molybdenum content 60wt%, ferromanganese alloy: manganese content 68wt%, iron-cobalt alloy: cobalt content 70wt%, ferroboron alloy: boron content 25wt%, scrap steel: iron content 98wt%; Vanadium carbide: particle size is 200nm, the manufacturer is Shanghai Xiangtian Nanomaterials Co., Ltd.; Magnesium borate whiskers: length 30~50μm, diameter 1μm, manufacturer is Shanghai Kaishefeng Industrial Co., Ltd.; Molybdenum silicide: particle size is 200nm, the manufacturer is Shanghai Xiangtian Nanomaterials Co., Ltd.; Tungsten silicide: particle size is 1μm, the manufacturer is Shanghai Xiangtian Nanomaterials Co., Ltd.

[0019] Example 1 The preparation of modified vanadium carbide comprises the following steps: 1 part of a modifier and 20 parts of vanadium carbide are uniformly mixed to obtain a mixture, the mixture is added into a hot pressing sintering furnace, the temperature is raised to 1600° C., hot pressing and heat preservation is performed for 3 hours, and the modified vanadium carbide is obtained by crushing, wherein 1 part of the modifier comprises 0.2 parts of magnesium borate whiskers and 0.8 parts of molybdenum silicide; The side guide plate of a high temperature friction and wear resistant roller press has an iron matrix composed of the following components by weight percentage: Cr10%, Ni 3%, Ti 5%, Mo 1%, B 0.5%, Mn 0.1%, Co 5%, and the balance is Fe and inevitable impurities; A method for preparing a high temperature friction and wear resistant roller press side guide plate comprises the following steps: S1. Mix ferrochrome (chromium content 75wt%), iron-nickel alloy (nickel content 80wt%), ferrotitanium alloy (titanium content 75wt%), ferromolybdenum alloy (molybdenum content 60wt%), ferromanganese alloy (manganese content 68wt%), iron-cobalt alloy (cobalt content 70wt%), and scrap steel (iron content 98wt%) according to target composition, heat to 1550° C., smelt in argon atmosphere to obtain molten steel, add modified vanadium carbide (wherein the mass ratio of modified vanadium carbide to iron matrix is ​​1:100), disperse evenly, and cast at 1500° C. to obtain a steel ingot; S2. After the steel ingot is descaled, it is rolled to obtain the side guide plate of the roller press.

[0020] Example 2 The preparation of modified vanadium carbide comprises the following steps: 1 part of a modifier and 20 parts of vanadium carbide are uniformly mixed to obtain a mixture, the mixture is added into a hot pressing sintering furnace, the temperature is raised to 1600° C., hot pressing and heat preservation is performed for 3 hours, and the modified vanadium carbide is obtained by crushing, wherein 1 part of the modifier comprises 0.2 parts of magnesium borate whiskers and 0.8 parts of tungsten silicide; The side guide plate of a high temperature friction and wear resistant roller press has an iron matrix composed of the following components by weight percentage: Cr12%, Ni 4%, Ti 5.5%, Mo 2%, B 1%, Mn 0.2%, Co 6.5%, and the balance is Fe and inevitable impurities; A method for preparing a high temperature friction and wear resistant roller press side guide plate comprises the following steps: S1. Mix ferrochrome (chromium content 75wt%), iron-nickel alloy (nickel content 80wt%), ferrotitanium alloy (titanium content 75wt%), ferromolybdenum alloy (molybdenum content 60wt%), ferromanganese alloy (manganese content 68wt%), iron-cobalt alloy (cobalt content 70wt%), and scrap steel (iron content 98wt%) according to target composition, heat to 1600° C., smelt in argon atmosphere to obtain molten steel, add modified vanadium carbide (wherein the mass ratio of modified vanadium carbide to iron matrix is ​​1.2:100), disperse evenly, and cast at 1525° C. to obtain a steel ingot; S2. After the steel ingot is descaled, it is rolled to obtain the side guide plate of the roller press.

[0021] Example 3 The preparation of modified vanadium carbide comprises the following steps: 1 part of a modifier and 20 parts of vanadium carbide are uniformly mixed to obtain a mixture, the mixture is added into a hot pressing sintering furnace, the temperature is raised to 1600° C., hot pressing and heat preservation is performed for 3 hours, and the modified vanadium carbide is obtained by crushing, wherein 1 part of the modifier comprises 0.2 parts of magnesium borate whiskers and 0.8 parts of tungsten silicide; The side guide plate of a high temperature friction and wear resistant roller press has an iron matrix composed of the following components by weight percentage: Cr15%, Ni 5%, Ti 6%, Mo 3%, B 1.5%, Mn 0.3%, Co 8%, and the balance is Fe and inevitable impurities; A method for preparing a high temperature friction and wear resistant roller press side guide plate comprises the following steps: S1. Mix ferrochrome (chromium content 75wt%), iron-nickel alloy (nickel content 80wt%), ferrotitanium alloy (titanium content 75wt%), ferromolybdenum alloy (molybdenum content 60wt%), ferromanganese alloy (manganese content 68wt%), iron-cobalt alloy (cobalt content 70wt%), and scrap steel (iron content 98wt%) according to target composition, heat to 1650° C., smelt in argon atmosphere to obtain molten steel, add modified vanadium carbide (wherein the mass ratio of modified vanadium carbide to iron matrix is ​​2:100), disperse evenly, and cast at 1550° C. to obtain a steel ingot; S2. After the steel ingot is descaled, it is rolled to obtain the side guide plate of the roller press.

[0022] Example 4 Compared with Example 2, the difference of Example 4 is that the modified vanadium carbide is prepared by the following steps: 2 parts of the modifier and 20 parts of vanadium carbide are evenly mixed to obtain a mixture, the mixture is added into a heat treatment furnace, the temperature is raised to 1600°C, and the sintering and hot pressing are carried out for 3 hours to obtain the modified vanadium carbide, wherein the 2 parts of the modifier include 0.4 parts of magnesium borate whiskers and 1.6 parts of tungsten silicide.

[0023] Example 5 Compared with Example 4, the difference of Example 5 is that 2 parts of the modifier include 0.8 parts of magnesium borate whisker and 1.2 parts of tungsten silicide.

[0024] Example 6 Compared with Example 4, the difference of Example 6 is that 2 parts of the modifier include 1 part of magnesium borate whisker and 1 part of tungsten silicide.

[0025] Example 7 Compared with Example 4, the difference of Example 7 is that 2 parts of the modifier include 1.2 parts of magnesium borate whiskers and 0.8 parts of tungsten silicide.

[0026] Comparative Example 1 Compared with Example 2, the difference in Comparative Example 1 is that the modified vanadium carbide is replaced by an equal amount of vanadium carbide.

[0027] Comparative Example 2 Compared with Example 2, the difference of Comparative Example 2 is that the added amount of the modifier is 0.5 parts, wherein the 0.5 parts of the modifier includes 0.1 parts of magnesium borate whiskers and 0.4 parts of tungsten silicide.

[0028] Comparative Example 3 Compared with Example 2, the difference of Comparative Example 3 is that the added amount of the modifier is 3 parts, wherein the 3 parts of the modifier include 0.6 parts of magnesium borate whiskers and 2.4 parts of tungsten silicide.

[0029] Comparative Example 4 Compared with Example 2, the difference in Comparative Example 4 is that 0.5 parts of the modifier is only magnesium borate whisker.

[0030] Comparative Example 5 Compared with Example 2, the difference in Comparative Example 5 is that 0.5 parts of the modifier is only tungsten silicide.

[0031] The roller press side guide plates prepared in Examples 1 to 7 and Comparative Examples 1 to 5 were tested according to the following method: 1. Maximum operating temperature: According to the test method specified in GB / T 8492-2014 "General purpose heat-resistant steel and alloy castings", the maximum operating temperature of the test sample is tested, and a thermal simulation experiment is carried out using a thermal simulation test machine. The microstructural changes of the side guide plate at different temperatures are observed through a metallographic microscope. The maximum temperature when there is no obvious deterioration of the microstructure (such as grain growth, phase change, etc.) is recorded as the maximum operating temperature of the side guide plate.

[0032] 2. Rockwell hardness: According to the test method specified in GB / T 230.1-2018 "Rockwell hardness test for metallic materials - Part 1: Test method", select Rockwell hardness scale C to test the Rockwell hardness of the sample.

[0033] The test results are shown in the following table: Table 1 Performance test results of the roller press side guide plates prepared in Examples 1 to 7 and Comparative Examples 1 to 5

[0034] Compared with Comparative Example 1, Example 2 adds modified vanadium carbide as a reinforcing phase. As a result, the maximum use temperature and Rockwell hardness of Example 2 are higher than those of Comparative Example 1, indicating that the addition of modified vanadium carbide can improve the temperature resistance and wear resistance of the roller press side guide plate. Compared with Example 2, the modifier of Comparative Example 4 is magnesium borate whisker, and the modifier of Comparative Example 5 is tungsten silicide. As a result, the maximum use temperature and Rockwell hardness of Example 2 are higher than those of Comparative Examples 4 and 5, indicating that when magnesium borate whisker and tungsten silicide are used to modify vanadium carbide at the same time, the temperature resistance and wear resistance of the roller press side guide plate can be improved. Compared with Example 2, Example 4 and Comparative Examples 2 and 3 add modifiers of different mass ratios. As a result, the maximum use temperature and Rockwell hardness of Examples 2 and 4 are higher than those of Comparative Examples 2 and 3, indicating that when the mass ratio of the modifier to vanadium carbide is 1 to 2:20, the obtained roller press side guide plate has better temperature resistance and wear resistance.

[0035] Compared with Example 4, Examples 5 to 7 added magnesium borate whiskers and tungsten silicide in different mass ratios. As a result, the maximum operating temperature and Rockwell hardness of Examples 5 and 6 were higher than those of Examples 4 and 7, indicating that when the mass ratio of magnesium borate whiskers to tungsten silicide is 2 to 3:3, the temperature resistance and wear resistance of the obtained roller press side guide plate are better.

[0036] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A side guide plate of a high temperature friction and wear resistant roller press, characterized in that: The invention is composed of an iron matrix and a reinforcement phase, wherein the iron matrix is ​​composed of the following components by weight percentage: Cr 10%-15%, Ni 3%-5%, Ti 5%-6%, Mo 1%-3%, B 0.5%-1.5%, Mn 0.1%-0.3%, Co 5%-8%, and the balance is Fe and inevitable impurities; the reinforcement phase is modified vanadium carbide, and the modifier of the modified vanadium carbide comprises magnesium borate whiskers and silicide, and the mass ratio of the modifier to the vanadium carbide is 1-2:

20.

2. The high temperature friction and wear resistant roller press side guide plate according to claim 1, characterized in that: The mass ratio of the magnesium borate whisker to the silicide is 2-3:

3.

3. The high temperature friction and wear resistant roller press side guide plate according to claim 1, characterized in that: The preparation of the modified vanadium carbide comprises the following steps: mixing a modifier and vanadium carbide to obtain a mixture, and sintering, hot pressing and crushing the mixture to obtain the modified vanadium carbide.

4. The high temperature friction and wear resistant roller press side guide plate according to claim 1, characterized in that: The length of the magnesium borate whisker is 30-50 μm.

5. The high temperature friction and wear resistant roller press side guide plate according to claim 1, characterized in that: The silicide includes one or both of molybdenum silicide and tungsten silicide.

6. The high temperature friction and wear resistant roller press side guide plate according to claim 1, characterized in that: The mass ratio of the modified vanadium carbide to the iron matrix is ​​1-2:

100.

7. The method for preparing a high temperature friction and wear resistant roller press side guide plate according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1. According to the composition of the iron matrix, materials are prepared, molten steel is obtained after smelting, a reinforcing phase is added, and after uniform dispersion, a steel ingot is obtained by casting; S2. The steel ingot is rolled after being descaled to obtain a roller press side guide plate.

8. The method for preparing a high temperature friction and wear resistant roller press side guide plate according to claim 7, characterized in that: The smelting temperature is 1550~1650℃.

9. The method for preparing a high temperature friction and wear resistant roller press side guide plate according to claim 7, characterized in that: The casting temperature is 1500-1550°C.

10. The method for preparing a high temperature friction and wear resistant roller press side guide plate according to claim 7, characterized in that: The protective gas for the smelting is argon.

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