Manufacturing method of copper-based brazing filler metal laser brazing cubic boron nitride grinding particles

A technology of cubic boron nitride and copper-based brazing filler metal, applied in manufacturing tools, welding media, welding equipment, etc., can solve the problems of high cost of CBN abrasive brazing, limited tool size, long production cycle, etc. The effect of low price, high energy density and low production cost

Active Publication Date: 2015-12-30
HENAN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for manufacturing cubic boron nitride abrasive grains by laser brazing of copper-based solder, which can effectively solv...

Method used

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  • Manufacturing method of copper-based brazing filler metal laser brazing cubic boron nitride grinding particles

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] see figure 1 , the manufacture method of copper-based solder laser brazing cubic boron nitride abrasive grains, specifically comprising the following steps:

[0017] (1). Put the 45 steel substrate and CBN abrasive 1 into an organic solvent and use ultrasonic cleaning method to degrease and decontaminate. This process should be strictly required to prevent oil from remaining on the metal surface after being heated and destroying the impact of liquid solder on the steel. The wetting effect of the substrate and uncoated CBN abrasive grains affects the formation of the solder layer;

[0018] (2). Distribute the copper-based solder 2 (Cu78-81Ni5-6Sn3-5.5Ti10-12) on the 45 steel substrate 3, arrange the 40 / 50 mesh CBN abrasive grains 1 in an orderly manner on the copper-based solder 2 Above, make 45 steel matrix 3-copper-based solder 2-CBN abrasive grains 1 to be processed samples arranged in sequence from bottom to top;

[0019] (3). Put the sample to be added into the CO...

Embodiment 2

[0022] The analysis of the microstructure of the interface between CBN abrasive grains and copper-based solder shows that active Ti elements are obviously segregated to the surface of CBN abrasive grains; and B and N elements in CBN also show diffusion phenomenon into the solder layer. These phenomena indicate that A chemical reaction takes place at the interface. The CBN abrasive grains are covered by copper-based solder, showing good wettability, which indicates that a wetting reaction has occurred between the CBN abrasive grains and the solder. After deep corrosion treatment, the reaction products on the surface of abrasive grains were found to be prismatic through SEM observation, and the X-ray diffraction spectrum showed that the reaction products on the surface of abrasive grains were TiN, TiB and TiB 2 ;

[0023] Analysis of the structure of the interface between the 45 steel matrix and copper-based solder, SEM topography photos and element line scanning, it can be see...

Embodiment 3

[0026] The equipment used in this embodiment mainly includes: CO 2 Lasers, CNC machining machines, and gas protection devices.

[0027] CO 2 The laser power of the laser is 600-750W, the spot scanning speed is 15-35mm / min, and the laser spot area is 8-15mm 2 , the best process parameters of laser brazing gold CBN abrasive grains are: laser power 680W, scanning speed 24mm / min, laser spot area 12mm 2 .

[0028] The copper-based solder is a high-temperature copper-based active solder, and the composition of the copper-based solder is Cu: 78-81%, Ni: 5-6%, Sn: 3-5.5%, Ti: 10-12%; The particle size of coated CBN abrasive grains is 40 / 50 / 60 mesh.

[0029] The cubic boron nitride abrasive grains are laser brazed on the 45 steel substrate with copper-based brazing material, and a chemical metallurgical reaction occurs at the bonding interface to realize the high-strength connection between the CBN abrasive grains and the substrate; Surface segregation occurs, and TiN, TiB and TiB...

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Abstract

The invention discloses a manufacturing method of copper-based brazing filler metal laser brazing cubic boron nitride grinding materials. The method particularly comprises the following steps that 1, a 45 steel substrate and CBN grinding particles are put in organic solvent, and deoiling and decontamination treatment are conducted through an ultrasonic cleaning method; 2, copper-based brazing filler metal is laid on the 45 steel substrate, and the CBN grinding particles are orderly distributed on the brazing filler metal; 3, a sample to be added is put on brazing equipment composed of a CO2 laser device, a numerical control machining tool and a gas shielding device, the copper-based brazing filler metal is heated and melted through laser which has certain frequency and is emitted by the CO2 laser device, and the brazing filler metal has good infiltration property on the steel substrate and the CBN grinding particles. According to the manufacturing method of the copper-based brazing filler metal laser brazing cubic boron nitride grinding materials, the manufacturing cost is low, brazing CBN particle grinding is conducted through laser, the energy density is high, the speed of increasing and decreasing the temperature is high, local heating can be achieved, a heat-affected zone is small, and heat damage is not prone to occurrence; laser beams can be transmitted through optical fibers, machining can almost be conducted on any brazing parts, and the flexibility is better.

Description

technical field [0001] The invention relates to the technical field of high-temperature brazing, in particular to a method for manufacturing cubic boron nitride abrasive grains by copper-based brazing material laser brazing. Background technique [0002] Cubic boron nitride (c-BN) is boron nitride with a cubic structure, and its molecular formula is BN. It has excellent properties such as high hardness, thermal stability and chemical inertness. Its hardness is second only to diamond. It is HV72000~98000 MPa, but its thermal stability is much higher than that of diamond, and it has greater chemical stability to iron series metal elements. Cubic boron nitride grinding tools have excellent grinding performance, not only capable of processing difficult-to-grind materials, improving productivity, but also effectively improving the grinding quality of workpieces. When grinding steel with cubic boron nitride abrasives, most of them can obtain high grinding ratio and machined surfa...

Claims

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Application Information

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IPC IPC(8): B23K1/005B23K35/30B23K1/20
CPCB23K1/0056B23K1/206B23K35/302
Inventor 杨志波张振明平美刘爱菊焦锋翟雁杨瑞云
Owner HENAN POLYTECHNIC UNIV
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