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Matrix and welding method for matrix and diamond piece

A technology of diamond sheet and welding method, which is applied in the field of surface processing and coating, can solve problems such as cracking, large stress, and scrapping, and achieve the effects of good thermal conductivity, low friction coefficient, and good wear resistance

Active Publication Date: 2016-07-13
LANGFANG SUPOWER DIAMOND TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Due to the different thermal expansion coefficients of diamond and base metal materials, large-sized diamond materials will generate greater stress during welding, which often leads to cracking and scrapping

Method used

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  • Matrix and welding method for matrix and diamond piece
  • Matrix and welding method for matrix and diamond piece

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1: as figure 1 , figure 2 As shown, a substrate, the substrate 4 has a cross groove 3, the cross groove 3 has notches on the side of the substrate 4; the cross groove 3 has notches on the four sides of the substrate 4.

[0021] The cross section of the cross groove 3 is rectangular, V-shaped or arc-shaped.

[0022] The diamond sheet 1 is connected to the substrate 4 through the solder paste 2 , and the cross groove 3 is located under the diamond sheet 1 . The material of the diamond sheet 1 can be diamond single crystal, CVD diamond thick film, polycrystalline diamond, or a composite of CVD diamond thick film and hard alloy, or a composite of polycrystalline diamond and hard alloy.

Embodiment 2

[0023] Embodiment 2: as figure 1 , figure 2 as shown,

[0024] A method for welding a substrate and a diamond sheet, comprising the following steps;

[0025] Mill the cross groove 3 on the surface of the substrate 4 of the cemented carbide, the width of the cross groove 3 is 0.05mm, and the depth of the cross groove 3 is 0.1mm, the surface of the substrate 4 of the cemented carbide is coated with the solder paste 2 of silver-copper-titanium alloy, and the diamond sheet The CVD diamond thick film of 1 is pressed on the solder paste 2, fixed well, after drying, put it into a vacuum brazing furnace to raise the temperature to 800 degrees, keep it warm for 3 minutes, and then cool it down. The material of the diamond sheet 1 can be diamond single crystal, CVD diamond thick film, polycrystalline diamond, or a composite of CVD diamond thick film and hard alloy, or a composite of polycrystalline diamond and hard alloy.

Embodiment 3

[0026] Embodiment 3: as figure 1 , figure 2 Shown, a kind of welding method of substrate and CVD diamond thick film tool;

[0027] The steps are as follows: Mill a cross groove 3 on the surface 4 of a hard alloy with a groove width of 1.8mm and a groove depth of 1.9mm, or process an annular groove plus a cross groove, the annular groove width is 2.0mm, and the annular groove depth is 1.9mm. The surface of the high-quality alloy 4 is covered with silver-copper-titanium alloy solder paste 2, and the CVD diamond thick film of the diamond sheet 1 is pressed on the solder paste to fix it. After drying, put it into a vacuum brazing furnace to raise the temperature to 880 degrees, keep it warm for 3 minutes, and cool down. That's it. The material of the diamond sheet 1 can be diamond single crystal, CVD diamond thick film, polycrystalline diamond, or a composite of CVD diamond thick film and hard alloy, or a composite of polycrystalline diamond and hard alloy.

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Abstract

The invention discloses a matrix and a welding method for the matrix and a diamond piece, and belongs to the technical field of surface processing and coating. The matrix is provided with a cross recess; the cross recess is provided with notches formed in the side surfaces; the section of the cross recess is rectangular, V-shaped or arc-shaped; the surface of the matrix is not limited to be horizontal, crossed, annular and / or grid-shaped. According to the welding method, the problem that a diamond is cracked due to different thermal expansion coefficients in a brazing process of a diamond brazing tool as a metal surface with a large thermal expansion coefficient has an expansion joint during cooling after high temperature welding is completed is solved. By the adoption of a method for slotting the surface of the metal matrix welded with the diamond (to achieve the effect of the expansion joint), the problem of cracks caused by different thermal expansion coefficients between the diamond and the tool matrix during welding is effectively avoided, and the whole strength of the diamond tool cannot be affected; therefore, a diamond material with an extremely low thermal expansion coefficient cannot be cracked.

Description

technical field [0001] The invention relates to a substrate and a welding method with a diamond sheet, belonging to the technical fields of surface processing and coating. Background technique [0002] Diamond has the highest hardness among known materials (Vickers hardness can reach 10,400kg / mm2, or about 102GPa), good wear resistance, extremely low coefficient of friction, and best thermal conductivity. Based on the above advantages, diamond is often welded with base metal materials to make various tools. [0003] In addition to the methods of electroplating and hot pressing with metal powder, the current diamond tools often use the method of brazing, and the diamond with a large contact area can only be brazed. [0004] Due to the different thermal expansion coefficients of diamond and base metal materials, large-sized diamond materials will generate greater stress during welding, which often leads to cracking and scrapping. [0005] After the welding of the diamond she...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K1/00B23K1/19B23P5/00
CPCB23K1/0008B23K1/19B23K2103/50B23P5/00
Inventor 李卫陈继锋
Owner LANGFANG SUPOWER DIAMOND TECH
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