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Method for manufacturing diamond tool with self-lubrication function

A diamond tool and functional technology, applied in the direction of manufacturing tools, metal processing equipment, welding equipment, etc., can solve the problems of reduced grinding efficiency, diamond thermal damage, shedding, etc., to reduce the heat generated by grinding, reduce the grinding temperature, Improves the effectiveness of the lubricating behavior

Inactive Publication Date: 2011-05-18
禹州市和汇超硬材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When these two kinds of diamond tools work under heavy load, the diamond abrasive particles fall off prematurely due to insufficient holding force on the diamond abrasive particles, the utilization rate of the diamond abrasive particles is low, and the tool life is short
In recent years, domestic and foreign studies have used the brazing method to make diamond tools, adding active elements (such as Ti, Cr, V, W) to the solder to improve the wettability of the solder to diamond abrasive particles. Diamond abrasive particles, The chemical metallurgical bond formed between the brazing filler metal and the matrix solves the problem of insufficient holding force on the diamond abrasive particles on the tool, but at the same time it also brings new problems, such as high brazing temperature and serious thermal damage to the diamond. self-sharpening is poor
The Ni-Cr alloy itself has high hardness and good wear resistance. After brazing, it has sufficient holding power for diamonds. However, the height of the brazing material layer and the exposed height of the diamond cannot maintain a proper ratio during use, so that the diamond tools In the later stage of use, the diamond exposure height is low, not sharp enough, and the grinding efficiency is reduced

Method used

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  • Method for manufacturing diamond tool with self-lubrication function
  • Method for manufacturing diamond tool with self-lubrication function

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment 1: a kind of manufacture method with self-lubricating function diamond tool, comprises the following steps:

[0015] (1) Add graphite particles with lubricating function to the Ni-Cr alloy; the content of graphite particles accounts for 2~20% of the total mass of the solder;

[0016] (2) Stir the mixture of Ni-Cr alloy and graphite particles evenly to form the solder for brazing diamond tools;

[0017] (3) if figure 1 As shown, diamond tool forming blanks are made in the order of diamond tool metal substrate 1, brazing filler metal 2, and diamond abrasive grains 3;

[0018] (4) Put the diamond tool forming blank into the heating furnace, adopt the brazing process, the heating temperature is 900~1100°C, and keep it warm for 1~20 minutes, so that the Ni-Cr alloy can chemically react with the graphite particles and diamond abrasive particles respectively. A diamond tool with self-lubricating function is produced.

[0019] The brazing method is a vacuum brazin...

Embodiment 2

[0021] Embodiment 2: A kind of manufacture method with self-lubricating function diamond tool, Ni-Cr alloy selects Ni-Cr-B-Si alloy for use, wherein Cr 17%, B 3.5%, Si 4.0%, C is 1%, Fe< 5.0%, and the balance is Ni. The diameter of graphite particles is 10 μm, and its mass accounts for 4% of the total mass of solder. The brazing filler metal (Ni-Cr-B-Si alloy and graphite particles) is mechanically stirred for 10 minutes, and the tool blank is made in the order of diamond tool steel substrate, brazing filler metal, and diamond abrasive grains, and the diamond tool substrate material is a steel substrate. Put the tool blank into the heating furnace, and carry out vacuum protection brazing at 1010°C for 1 minute, so that the Ni-Cr-B-Si alloy containing graphite particles and the diamond undergo a chemical reaction, and then cool to room temperature with the furnace.

[0022] Others are with embodiment 1.

Embodiment 3

[0023] Embodiment 3: A kind of manufacture method with self-lubricating function diamond tool, Ni-Cr alloy selects Ni-Cr-B-Si alloy for use, wherein Cr 17%, B 3.5%, Si 4.0%, C is 1%, Fe< 5.0%, and the balance is Ni. The diameter of graphite particles is 10 μm, and its mass accounts for 6% of the total mass of solder. The brazing filler metal (Ni-Cr-B-Si alloy and graphite particles) is mechanically stirred for 10 minutes, and the tool blank is made in the order of the diamond tool metal matrix, brazing filler metal, and diamond abrasive grains. The diamond tool matrix material is a steel matrix. Put the tool blank into the protection device, and perform induction brazing at 1030°C for 30 seconds, so that the Ni-Cr-B-Si alloy containing graphite particles and diamond undergo a chemical reaction, and cool to room temperature to take out the sample.

[0024] Others are with embodiment 1.

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Abstract

The invention provides a method for manufacturing a diamond tool with self-lubrication function. The method comprises the following steps: adding graphite particles with lubrication function into Ni-Cr alloy, wherein the graphite particles account for 2 to 20 percent of the total mass of the whole brazing filler metal; uniformly stirring mixture of the Ni-Cr alloy and the graphite particles to together form the brazing filler metal of a braze welding diamond tool; manufacturing a molded blank of the diamond tool according to a sequence of diamond tool metal substrate, the brazing filler metal and the diamond abrasive particles; putting the molded blank of the diamond tool into a heating furnace, adopting the brazing process, wherein the heating temperature is between 900 and 1,100 DEG C, the temperature is preserved for 1 to 20 minutes to ensure that the Ni-Cr alloy performs chemical reactions with the graphite particles and the diamond abrasive particles respectively to manufacture the diamond tool with the self lubrication function. The method can effectively improve the use performance, the lubrication effect and the scrap storage capability of the diamond tool to ensure that the diamond tool has higher grinding efficiency.

Description

technical field [0001] The invention belongs to the field of making superhard abrasive tools, in particular to a method for making a diamond tool with a self-lubricating function. Background technique [0002] At present, there are two main types of diamond tools, sintered and electroplated. Sintered diamond tools are made by mixing metal powder and diamond abrasive particles by pressing and sintering. The interface between diamond abrasive particles and the matrix material is almost non-wetting, and there is basically no chemical metallurgical combination; electroplated diamond tools only rely on coating machinery to embed and inlay diamond abrasive particles. There is little bond strength at the diamond and coating interface. When these two kinds of diamond tools work under a heavy load, the diamond abrasive particles fall off prematurely due to insufficient holding force to the diamond abrasive particles, the utilization rate of the diamond abrasive particles is low, and...

Claims

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Application Information

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IPC IPC(8): B23K1/008B23K1/002B23K1/20
Inventor 卢金斌孟普王志新
Owner 禹州市和汇超硬材料有限公司
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