A kind of manufacture method of polycrystalline diamond abrasive grain
A polycrystalline diamond and manufacturing method technology, applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of limited grinding ability, poor bonding between adhesive and diamond, and diamond abrasive grain falling off, and achieve high packing density. , strong binding, tight binding effect
Active Publication Date: 2021-06-11
ZHECHENG HUIFENG DIAMOND TECH
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Problems solved by technology
The difficulty of the process is reduced, and the price of diamond is also greatly reduced, but its durability and durability are poor, and the grinding capacity is limited
[0004] Adhesives are used to bond diamond particles together to form larger-sized abrasive grains, but the bonding between the adhesive and diamond is poor, mainly by van der Waals force, and there is no firm bond with the C atoms in the diamond. chemical bond
Cause the diamond abrasive grains to fall off from the substrate without functioning
Method used
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[0033] The embodiment of the present invention will be described in detail in conjunction with the accompanying drawings. This embodiment is based on the technical solution of the present invention, and provides detailed implementation and specific operation process, but the scope of protection of the present invention is not limited to the following embodiments.
[0034] According to accompanying drawing, a kind of manufacture method of polycrystalline diamond abrasive grain comprises the following steps:
[0035] Step 1. Put the diamond powder into the dispersion chamber 3;
[0036] Step 2, put Ti powder into the crucible, and then put the crucible into the heating tube 2;
[0037] Step 3, vacuuming, stop vacuuming when the vacuum value is lower than 1000pa, and pass in an inert gas, repeat three times; under the sealed condition, input the inert gas from the air inlet 101 into the air induction pipe 1 through the gas storage tank 4, The inert gas can be argon, neon, or xen...
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Abstract
The invention provides a method for producing polymerized polycrystalline diamond abrasive grains, comprising the following steps: coating the diamond powder with titanium; pressing the titanium-coated diamond powder into a block; sintering the formed diamond powder block , at a heating rate of 5-10°C / min, raise the temperature to 950-1050°C, keep it for 1.5-2.5h, and then lower the temperature to room temperature at a cooling rate of 3-7°C / min; sinter The final diamond powder block is ball milled in a ball mill; hydrochloric acid is added to the powder obtained after ball milling, and the volume fraction of hydrochloric acid is 10-15%, heated and stirred at a heating temperature of 40-60°C; the hydrochloric acid-treated powder is Take out the body, wash it with pure water until the pH value is 6.8~7.2, and obtain polycrystalline diamond abrasive grains after the powder is dried; this method has low cost, high packing density of diamond, and a strong chemical bond can be formed between diamond and binder , strong binding force.
Description
technical field [0001] The invention relates to the technical field of diamond surface treatment, in particular to a method for manufacturing polycrystalline diamond abrasive grains. Background technique [0002] As a precision abrasive, polycrystalline diamond is used for ultra-precision grinding and polishing of sapphire, magnetic head, hard disk, hard glass and crystal, ceramics and hard alloy, such as thinning of LED sapphire. It can also be used as a coating additive for the coating of metal molds, tools, components, etc., which can greatly improve surface wear resistance, surface hardness, and prolong service life. It is also often used as a grinding liquid for grinding. It is also possible to make knives that are less prone to chipping when cutting. [0003] Polycrystalline diamond is composed of spherical crystallites, and the crystallite size is only nanometers to tens of nanometers. It has excellent grinding performance, high removal rate and toughness, and bett...
Claims
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IPC IPC(8): C09K3/14
CPCC09K3/1418
Inventor 许坤段向阳田喜敏杨鹏许军伟杜银霄陈雷明曾凡光
Owner ZHECHENG HUIFENG DIAMOND TECH