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Method for treatment of binding agent for super hard abrasive tools

A technology of superhard abrasive tools and processing methods, which is applied in the direction of grain processing, abrasive materials, grinding devices, etc., and can solve the problems of narrowing the average composition range, reducing energy storage, and reducing the beneficial effect of solid-state sintering, so as to achieve convenient application and improve Sinterable ability, effect of improving strength

Inactive Publication Date: 2008-11-26
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] 3. In the final stage, the layer becomes finer and more convoluted, and the average composition range of the powder mixture of each particle narrows
[0012] from figure 1 It can be seen that when the mechanical alloying is carried out for 30 hours, the energy release of the Cu-Fe powder reaches the maximum value during the heating process. If the time is too long, the energy storage will be reduced, and the beneficial effect on solid-state sintering will be reduced.

Method used

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  • Method for treatment of binding agent for super hard abrasive tools
  • Method for treatment of binding agent for super hard abrasive tools
  • Method for treatment of binding agent for super hard abrasive tools

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Embodiment 1

[0026] Preliminarily mix the metal powder with a mass ratio (wt%) of Cu 50%, Fe 50%, and an average particle size of 32-40 μm, put it into a steel ball mill jar, and add GCr15 with a diameter of 14mm according to 10 times the mass of the metal powder. steel ball, and drop into the metal powder mass 2% methanol as a process control agent. After sealing, open the vacuum valve to evacuate, and then inject argon. Place the ball mill jar on the XM-4×05 planetary ball mill, adjust the rotation speed to 200r / min, and the reverse frequency to 40Hz. After continuous mechanical alloying for 30 hours, the ball mill jar was removed and left for 5 hours, and then the mechanically alloyed metal powder was taken out. The processed metal powder is not subjected to any other treatment. After calculation, it is directly weighed and added to a graphite mold with a cavity of 4×7×40mm for the manufacture of small saw blade heads, and placed in a RYJ-98A type thermal On the pressure sintering mac...

Embodiment 2

[0028] Preliminarily mix the prepared metal powder according to the table below, put it into a steel ball mill tank, add GCr15 steel balls with a diameter of 14mm according to 10 times the weight of the metal powder, and drop methanol with a weight of 2% of the metal powder for the process control agent.

[0029] raw material

[0030] After sealing, open the vacuum valve to evacuate, and then inject argon. Place the ball mill jar on the XM-4×05 planetary ball mill, adjust the rotation speed to 200r / min, and the reverse frequency to 40Hz. After continuous mechanical alloying for 30 hours, the ball mill jar was removed and left for 5 hours, and then the mechanically alloyed powder was taken out. The treated powder is not subjected to other treatment, weighed after calculation, added to the graphite mold used to manufacture ultra-thin small saw blades with a thickness of 0.2mm, and placed on the RYJ-98A hot-press sintering machine. 20MPa, 780°C, hold for 3 minutes, made...

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Abstract

A method for preparing ultra-hard grinding tool with metallic binder features that the mixed metallic powder is ball-ground in high-energy ball grinder to make the particles in a high-energy state, and in the following sinter procedure, the energy accumulated in metallic particles is released, so resulting in lower sinter temp and high sinter performance.

Description

technical field [0001] The invention relates to a method for treating a bond in a metal bond superabrasive tool. Background technique [0002] Traditional metal-bonded superabrasives are uniformly mixed with various metal powders and superabrasives (such as diamond, cubic boron nitride, etc.) according to the calculation, then weighed, put into a mold, pressed, and sintered to become The metal bond-superabrasive complex combined with a metal bond and containing a certain proportion of superabrasives becomes the working part of the superabrasive tool. Because the quality of diamond and cubic boron nitride deteriorates seriously at high temperature, the sintering temperature is generally limited to below 900°C, and the commonly used temperature is between 750 and 850°C, and the holding time should be as short as possible. [0003] In order to meet the requirements of the performance of superabrasives on the binder during the working process, the binder is generally composed o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B24D18/00B24D3/06B02C17/00B02C25/00
Inventor 王明智赵玉成
Owner YANSHAN UNIV