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Preparation method for increasing thickness of coating of diamond tool

A technology for diamond tools and coating thickness, which is applied in the field of preparation for increasing the coating thickness of diamond tools, can solve the problems of uneven distribution of diamonds, not a lot of content, cumbersome and complicated welding processes and steps, and achieves a simple manufacturing process and a high level of preparation. The method is simple and the effect of shortening the production time

Inactive Publication Date: 2013-08-21
CHINA YITUO GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, when the brazing filler metal melts and overflows when heated at high temperature, the brazing layer is thin and uneven in thickness, and the distribution of internal diamonds will also be uneven, shortening the service life of diamond tools
[0007] The invention with the patent No. 200710161619.0 selects the powder mixture of many precious metals such as Ti, V, Cr, Zr, Mo, W as the solder, and also manufactures a lot of templates with superabrasive particle size holes, which increases the cost. The welding process and steps are too cumbersome and complicated, and a lot of time is wasted
[0008] The paper "Adaptability of Vacuum Brazing Filler for Diamond Tools" (Journal of Welding Society, 2004, 25(1): 80-82) used BNi 2 When used as solder, in BNi 2 In the mixture with diamond, no other strong carbide forming elements are added, although BNi 2 Contains strong carbide-forming elements, but the content is not very large, it cannot fully wet the diamond, making it difficult to achieve a good solidification effect with the metal matrix

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1: A diamond coating with a thickness of 0.9 mm was prepared on a low-carbon steel Q235 substrate.

[0025] The thickness of the diamond tool coating is 0.9mm. According to the coating thickness requirements (the thickness of each layer of diamond brazing material is 0.5mm, the thickness is reduced to 60% of the original thickness after brazing, and each layer is reduced to 0.3mm after brazing. mm) plus two layers of barbed wire.

[0026] Include the following steps:

[0027] ①Remove scale from the surface of the low carbon steel Q235 substrate and clean it with acetone to avoid scale, oil and dust;

[0028] ② Select stainless steel wire mesh or wire mesh, the diamond particles used are 45-50 mesh (the average mesh number of diamond particles is 48 mesh), the wire mesh used is 48 mesh × 48 mesh (the diameter of the wire mesh is 0.17mm, the mesh size is 0.36 mm×0.36mm);

[0029] ③Cut the size of the screen according to the required diamond coating area, and cl...

Embodiment 2

[0033] Example 2: A diamond coating with a thickness of 1.2 mm was prepared on a 45 steel substrate.

[0034] The thickness of the diamond tool coating is 1.2mm, and three layers of barbed wire are added according to the coating thickness requirements (the thickness of each layer of diamond brazing material is 0.5mm, and each layer is reduced to 0.3mm after brazing).

[0035] Selected diamond and barbed wire specification are with embodiment 1.

[0036] The solder formula of the present embodiment is: Cr12%, 102 flux 9%, BNi 2 79%.

[0037] The preparation method of the diamond-coated brazing material is the same as in Example 1.

[0038] Diamond tool coating preparation method is: the preparation method of diamond tool is the same as embodiment 1, just will add three layers of barbed wire and evenly smear four layers of diamond brazing materials and heat to 1000 ℃ in vacuum brazing furnace.

Embodiment 3

[0039] Example 3: A diamond coating with a thickness of 1.5 mm was prepared on a low-carbon steel Q235 substrate.

[0040] The thickness of the diamond tool coating is 1.5mm, and four layers of barbed wire are added according to the coating thickness requirements (the thickness of each layer of diamond brazing material is 0.5mm, and each layer is reduced to 0.3mm after brazing).

[0041] The solder ratio of this embodiment is: Cr15%, 102 flux 12%, BNi 2 73%.

[0042] The preparation method of the diamond-coated brazing material is the same as in Example 1.

[0043] The method for making the diamond tool coating is as follows: the method for making the diamond tool is the same as in Example 1, except that four layers of barbed wire are added to evenly smear five layers of diamond brazing material and heated to 1050° C. in a vacuum brazing furnace.

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Abstract

The invention discloses a preparation method for increasing the thickness of a coating of a diamond tool. A brazing material comprises the following components in percentage by weight: 10 to 15 percent of Cr powder, 7 to 12 percent of 102 soldering flux, and 73 to 83 percent of BNi2. The method comprises the following steps of: uniformly mixing the brazing material and diamond grains mechanicallyto prepare a diamond brazing material; adding a small amount of rosin to bond the diamond brazing material; increasing the thickness of the diamond brazing material by adopting a layer-by-layer mesh adding mode; and brazing under the vacuum condition to realize solidified welding between the diamond grains and the steel matrix. The diamond tool with the thick coating can be prepared by the mesh adding method; and the diamond grains are uniformly distributed in the coating, and the service life of the diamond tool is prolonged. The mesh can also make the molten coating melt permeate and complement mutually in the coating, and reduce the internal defects of the coating.

Description

technical field [0001] The invention relates to a diamond tool coating technology for cutting non-metallic materials. It mainly proposes a preparation method for increasing the coating thickness of diamond tools. The prepared diamond tools are used for ceramics, glass, concrete and granite, etc. Processing of brittle materials. Background technique [0002] Diamond tools consist of a metal substrate and a diamond coating. Under the prior art, there are mainly the following methods for making diamond tools. [0003] Electroplated diamond tools. Because the electroplating process is simple and easy to use, it is mostly used in the manufacture of diamond tools. However, the tools produced by this method have only a thin layer of diamond coating on the surface, which is not very durable. Moreover, there is no chemical metallurgical bond between the electro-deposited coating metal on the diamond tool and the interface between the diamond particles and the metal substrate, and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P5/00
Inventor 李锋军任凤章蔡安克段华荣肖丽丽闫焉服
Owner CHINA YITUO GROUP