Preparation method of composite hard material

A technology of composite hard materials and hard alloy blocks, which is applied in the direction of metal material coating process, coating, fusion spraying, etc. Performance degradation and other problems, to achieve the effect of omitting mold engraving and layout time, simple and fast production process, and good wear resistance

Pending Publication Date: 2022-02-01
湖南威盾新材料技术有限责任公司
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  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the matrix (metal material part) of the composite hard material prepared by vacuum brazing has experienced high temperature in the vacuum furnace and is in an annealed state, resulting in a sharp decline in its mechanical properties, and the product is easily deformed and broken during use; There are many cracks on the surface of the composite hard material prepared by laser cladding, and the thickness of a single cladding is limited (generally less than 1mm). The prepared composite hard material has a low bondi

Method used

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  • Preparation method of composite hard material
  • Preparation method of composite hard material
  • Preparation method of composite hard material

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Experimental program
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Example Embodiment

[0034] According to an overall technical concept of the present invention, such as Figure 1-3 As shown, a method of preparing a composite hard material comprising the steps of:

[0035] According to the design requirements, the metal substrate can be steel, select the grade, performance, shape, size, and the distribution of the steel surface of the steel material, and the shape of the steel material may be a plane or a surface of the steel.

[0036] A nickel-based alloy coating is applied to the surface of the steel by flame spraying.

[0037] The hard alloy block is placed on the surface of the nickel-based alloy coating, and then the hard alloy block is generated by instantaneous current, so that the hard alloy block is automatically generated by instantaneous application. The melting point of the nickel-based alloy coating is lower than the liquid phase of the cemented carbide. At this time, the molten nickel-based alloy coating wets the lower surface of the hard alloy block. W...

Example Embodiment

[0047] Example 1

[0048] In the outer surface of the tubular 40Cr substrate of φ120mm outer diameter * φ260mm inner diameter * 70 mm, the powder nickel-based powder is used as a flame spray, and a layer of nickel-based alloy coating is applied, and the thickness is controlled at 0.08 mm. .

[0049] The 40 cR substrate of the nickel-based alloy coating is placed on the automatic fast discharge equipment clamp. Automatic fast discharge equipment has a hard alloy block automatic conveying and bonding device, the hard alloy block, which is a WD11C number provided by Wei Shun New Materials Co., Ltd., with a size of 12mm long * 5mm wide * 3mm thick. Depending on the customer's requirements, and combined with the outer diameter of the substrate, it is determined that the transverse direction and the longitudinal pitch between the hard alloy blocks are 3.3 mm and 2.5 mm, respectively, respectively, respectively, in the PLC program on the automatic fast discharge device.

[0050] The auto...

Example Embodiment

[0056] Example 2

[0057] In the surface of the tubular 40Cr substrate in the tubular 40Cr substrate of φ70 mm inner diameter * φ70 mm, the inner wall surface is applied, and a layer of nickel-based alloy coating is applied with a flame spraying method, and the thickness is controlled at 0.1 mm.

[0058] The 40 cR substrate of the nickel-based alloy coating is placed on the automatic fast discharge equipment clamp. Automatic fast discharge equipment has a hard alloy block automatic conveying and bonding device, the hard alloy block, which is a WD11C number provided by Wei Shun New Materials Co., Ltd., with a size of 12mm long * 5mm wide * 3mm thick. Depending on the customer's requirements, and combined with the outer diameter of the substrate in length, it is determined that the lateral direction between the hard alloy block is 3.5 mm and 3 mm, respectively, and in the PLC program on the automatic fast discharge device, respectively.

[0059] The automatic fast discharge device i...

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Abstract

The invention discloses a preparation method of a composite hard material, and belongs to the technical field of composite materials. The method comprises the following steps: spraying a nickel-based alloy coating on the surface of a metal matrix by flame; fixing a hard alloy block and the metal matrix through fusion welding; and cladding a metal ceramic material in gaps among the hard alloy blocks by adopting a plasma transferred arc cladding technology to obtain the composite hard material. According to the invention, the plasma transferred arc cladding technology is adopted to clad the metal ceramic material in the gaps between the hard alloy blocks, and the hard alloy blocks and the metal base material form metallurgical bonding, so that the compounding of the metal base material, the hard alloy, the nickel-based alloy and the tungsten carbide ceramic particles is realized. The obtained composite hard material has the advantages of lower porosity, fewer cracks, higher bonding strength between the plasma transferred arc cladding layer and the hard alloy block and between the plasma transferred arc cladding layer and the metal base material, and excellent wear resistance and impact resistance.

Description

technical field [0001] The invention belongs to the technical field of composite materials, in particular to a preparation method of composite hard materials. Background technique [0002] Cemented carbide is often used to prepare cutting tools due to its high hardness and wear resistance, and is known as the "teeth" of industry. Its industrial application is not limited to cutting tools, but also such as mining alloys and wear-resistant parts. However, due to its high brittleness, difficulty in processing, and high cost, the application of cemented carbide in some tool parts in some fields is greatly limited, especially some tools that have both wear and impact and cold and heat cycles. under harsh working conditions. For example, "radial bearings" and "rolling guides" for high-speed wire laying machines are used in screw motors in the field of oil and gas drilling and production. With the continuous development of technology, the emergence of composite hard materials wi...

Claims

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Application Information

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IPC IPC(8): C23C4/129C23C4/06C23C4/18C23C24/10C22C29/08C22C19/03C23C4/16
CPCC23C4/129C23C4/06C23C4/18C23C24/103C22C19/03C22C29/067C22C29/08C23C4/16
Inventor 刘少存
Owner 湖南威盾新材料技术有限责任公司
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