Low-carbon steel composite wear-resistant lining plate

Abstract

The utility model relates to a low-carbon steel composite wear-resisting lining plate which comprises a base plate, wear-resisting layers are arranged on the base plate, the wear-resisting layers are arranged in an array mode, and the wear-resisting layers are formed in grooves in a stirring friction welding mode. The wear-resistant lining plate has the advantages that the wear-resistant layers arranged in the array are arranged on the base plate, and the wear-resistant layers are formed on the base plate in a non-full-covering processing mode, so that the residual stress of the wear-resistant lining plate can be remarkably reduced, the wear resistance of the surface of the lining plate is improved, the lining plate has plasticity and toughness, and the mechanical property of parts is remarkably improved; and the service life of parts is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of steel plate structure, especially relates to a low carbon steel composite wear-resistant lining plate. BACKGROUND

[0002] With the high-speed development of modern industry, the working conditions of mechanical equipment are becoming more and more severe, and many workpieces and equipment fail rapidly due to wear and tear. As one of the main forms of material damage, wear and tear causes considerable waste of materials and economic losses. According to statistics, friction consumes one-third of the world's primary energy, and about 80% of mechanical parts fail due to wear and tear. Surface engineering is a surface treatment method that enhances the strength, hardness and wear resistance of parts by means of surfacing and coating, etc. On this basis, the material properties such as plasticity and toughness of the original parts are also retained, thereby significantly improving the comprehensive mechanical properties of the parts and prolonging the service life of the strengthened parts.

[0003] Currently, there are two main ways to produce wear-resistant steel plates. One is to use high-hardness wear-resistant plates made of high-alloy components, but the price of this steel plate is relatively high, and its application is greatly limited. The other is to perform full-cover surfacing on the surface of plain carbon steel or stainless steel. Chinese Patent Publication No. CN 216693028 U discloses a wear-resistant steel plate, which has a wear-resistant layer surfacing on the base plate and a grid-shaped reinforcing layer surfacing on the wear-resistant layer. Chinese Patent Publication No. CN 202147448 U discloses a composite wear-resistant steel plate, which includes a base plate and a hard face layer surfacing on the base plate, and the hard face layer is a chromium carbide hard face layer. However, surfacing belongs to fusion welding technology, and full-cover surfacing is performed on the entire surface of the wear-resistant plate, which can cause a very large residual stress inside the wear-resistant plate, and a large number of net-shaped cracks can be formed in the hard face layer. In the process of use, the hard face layer has a large brittleness, and is easily subjected to wear and impact, which can cause the hard face layer to fall off, thereby seriously affecting the service life. SUMMARY

[0004] To overcome the shortcomings of the prior art, the utility model aims to provide a low carbon steel composite wear-resistant lining plate, which improves the wear-resistant performance of the lining plate, thereby significantly improving the mechanical properties of the parts and prolonging the service life of the parts.

[0005] To achieve the above-mentioned purpose, the utility model realizes the following technical scheme:

[0006] A low carbon steel composite wear-resistant lining plate, which comprises a base plate, and a wear-resistant layer is arranged on the base plate, wherein the wear-resistant layer is arranged in an array, and the wear-resistant layer is formed by friction stir welding in a groove.

[0007] The groove is a rectangular groove.

[0008] The groove is composed of two or more small grooves, and the spacing between the small grooves is less than or equal to 20 mm.

[0009] The groove is filled with alloy powder and or ceramic powder.

[0010] The depth of the groove is more than 3mm and the width is 10-20mm.

[0011] The depth of the wear-resistant layer is more than 3mm.

[0012] The upper surface of the wear-resistant layer is in the same plane with the surface of the substrate.

[0013] The substrate is a low-carbon steel plate.

[0014] The upper surface of the wear-resistant layer is a corrugated structure.

[0015] Compared with the prior art, the utility model has the beneficial effects that:

[0016] The utility model discloses a wear-resistant lining plate, which comprises a substrate and a wear-resistant layer arranged on the substrate in an array.

[0017] The utility model has the following specific advantages:

[0018] 1) The substrate of the wear-resistant lining plate is made of low-carbon steel, and the substrate has excellent toughness and machinability and low cost.

[0019] 2) The wear-resistant layer is prepared by using the non-full covering processing mode, the friction stir welding technology and the composite powder material, so that the residual stress of the wear-resistant lining plate can be significantly reduced.

[0020] 3) The unique spoon hole is formed by using the friction stir welding technology, and in the use process, the abrasive grains on the surface of the wear-resistant lining plate can fall into the spoon hole, so that the abrasive grains can be reduced on the wear-resistant lining plate, and the wear resistance of the wear-resistant lining plate can be improved. DRAWINGS

[0021] Figure 1 It is the arrangement structure schematic of groove Figure 1 .

[0022] Figure 2 It is the surface structure schematic of low-carbon steel composite wear-resistant lining plate Figure 1 .

[0023] Figure 3 It is the arrangement structure schematic of groove Figure 2 .

[0024] Figure 4 It is the surface structure schematic of low-carbon steel composite wear-resistant lining plate Figure 2 .

[0025] In the figure: 1 - substrate 2 - groove 3 - wear-resistant layer 4 - small groove. DETAILED DESCRIPTION

[0026] The utility model will be described in detail below in conjunction with the drawings of the specification, but it should be pointed out that the implementation of the utility model is not limited to the following embodiments.

[0027] Example 1:

[0028] See Figures 1-2 A low-carbon steel composite wear-resistant lining plate, comprising a substrate 1, the substrate 1 is provided with a wear-resistant layer 3, and the wear-resistant layer 3 is arranged in an array. The surface of the wear-resistant layer 3 is a corrugated structure, and one end has a conical groove consistent with the shape of the end of the friction stir tool. The substrate 1 is a low-carbon steel plate (Q235), and the carbon content is ≤0.25%. A plurality of rectangular grooves 2 with the same size are opened on the substrate 1, the grooves 2 are arranged in an array, the depth of the grooves 2 is 4.5 mm, the width is 15 mm, and the length is 90 mm. The grooves 2 are filled with composite powder, and the composite powder is composed of 30 wt% WC ceramic powder and 70 wt% Fe alloy powder. After filling the composite powder, the surface of the substrate 1 is level. Friction stir welding is performed at the position of the groove 2 to make the composite powder and the matrix fully mixed, and the friction stir processing path formed in the groove 4 is the wear-resistant layer 3 on the surface of the base material, see Figure 2 The tool for friction stir welding is tungsten-rhenium alloy. The flash formed on the surface of the substrate 1 after friction stir processing is removed by machining to make the surface of the low-carbon steel composite wear-resistant lining plate flat.

[0029] Example 2:

[0030] See Figures 3-4 A low-carbon steel composite wear-resistant lining plate, comprising a substrate 1, the substrate 1 is provided with a wear-resistant layer 3, and the wear-resistant layer 3 is arranged in an array. The substrate 1 is a Q215 low-carbon steel, and a plurality of small grooves 4 with the same geometric size are processed on the substrate 1. The small grooves 4 are arranged in pairs, one group of small grooves 4 is a groove group, and the groove groups are arranged in an array. The distance between the small grooves in the groove group is less than or equal to 20 mm. The depth of the small groove 4 is 3 mm, and the width is 12 mm. The small groove 4 is filled with composite powder, and the composite powder is composed of 50 wt% WC ceramic powder and 50 wt% Ni alloy powder. After filling the composite powder, the surface of the substrate 1 is level.

[0031] Friction stir welding is performed at the position of the small groove to make the composite powder and the matrix fully mixed, and the friction stir processing path formed in the two small grooves 4 of the groove group is opposite, and the friction stir processing path formed in the small groove 4 is the wear-resistant layer 3 on the surface of the base material, see Figure 4The tool of the friction stir welding is tungsten-rhenium alloy. The flash formed on the surface of the base plate 1 by the friction stir processing is removed by machining to make the surface of the low-carbon steel composite wear-resistant lining plate flat.

[0032] The utility model discloses an arrayed wear-resistant layer 3 is arranged on the base plate 1, and the base plate 1 forms the wear-resistant layer 3 by the non-full covering processing mode, can significantly reduce the residual stress of wear-resistant lining plate, improves the plasticity and toughness of lining plate surface wear-resistant performance simultaneously, thereby significantly improves the mechanical properties of parts, prolongs the service life of parts.

[0033] Through the above specific embodiment, the person skilled in the art can easily realize the utility model. However, it should be understood that the utility model is not limited to the above specific embodiment. On the basis of the disclosed embodiment, the person skilled in the art can arbitrarily combine different technical features to realize different technical solutions. Limited by the length and to make the specification brief, each scheme formed by these combinations is not described one by one. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A low carbon steel composite wear-resistant liner plate characterized by, The wear-resistant layer is formed by friction stir welding in the groove. The groove is a rectangular groove. The groove is composed of two or more small grooves, and the distance between the small grooves is less than or equal to 20 mm. The groove is filled with alloy powder and / or ceramic powder.

2. A low carbon steel composite wear-resistant liner plate according to claim 1, characterized in that, The depth of the groove is greater than or equal to 3 mm, and the width is 10-20 mm.

3. A low carbon steel composite wear-resistant liner plate according to claim 1, characterized in that, The depth of the wear-resistant layer is greater than or equal to 3 mm.

4. A low carbon steel composite wear-resistant liner plate according to claim 1, characterized in that, The upper surface of the wear-resistant layer is in the same plane as the surface of the substrate.

5. A low carbon steel composite wear-resistant liner plate according to claim 1, characterized in that, The substrate is a low-carbon steel plate.

6. A low carbon steel composite wear-resistant liner plate according to claim 1, characterized in that, The upper surface of the wear-resistant layer is a corrugated structure.

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