Method for producing metal and diamond composite body

A manufacturing method and diamond technology, applied in metal rolling, manufacturing tools, metal processing equipment, etc., can solve problems such as low density, particle surface layer oxidation, and composite quality that cannot meet the requirements, so as to improve product quality and reduce production cost effect

Inactive Publication Date: 2009-07-15
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Here are the following insurmountable problems: First, most metal powders are easier to oxidize (larger specific surface area) than the same kind of metal blocks. The reduction treatment and hot pressing of metal powders before use are all to solve this problem. But it turns out that the problem of oxidation of the surface layer of the particles, which affects the quality of the complex, often occurs
Second, the price of almost all metal powders is higher than that of metal plates, pipes, etc., and the performance of the powder after sintering is much lower than that of similar metal blocks (the density is lower than that of the block), and the density is relatively low. Difficult to meet the body weight requirements
Third, due to the consideration of the ability of diamond to withstand temperature, during the metal powder sintering process and the metal powder composition ratio, it is often limited by the temperature to add low melting point substances, such as Sn, Zn, etc., thus sacrificing the sintered block. body performance

Method used

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  • Method for producing metal and diamond composite body
  • Method for producing metal and diamond composite body
  • Method for producing metal and diamond composite body

Examples

Experimental program
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Effect test

Embodiment 1

[0024] (1) Take a section of copper tube with a wall thickness of 1 mm and an inner diameter of 6 mm; (2) Flatten it on a press to leave a cavity of 2 to 3 mm; (3) The inner wall of the tube is washed with alkali, pickled and soaked in acetone to remove oil , rust and attachments, dry for later use; (4) fill the calculated amount of diamond with a particle size of 0.3mm and metal powder for brazing into the cavity of the flattened copper tube, and the metal for brazing The volume of the powder is 8% of the complex, and the composition is (Wt.%) 20% Sn+80% Cu. The calculated amount is estimated that the volume occupied by diamond in the composite body after rolling is 40%; (5) after shaking, one end is pressed and placed at the stick gap of the two-roll rolling mill, and rolled at a speed of 0.2m / min; (6 ) after each pass to measure the thickness; (7) rolling after three passes to obtain a composite body of 0.4 mm, and no diamond exposed on the surface. (8) Then the obtained c...

Embodiment 2

[0026] (1) get 08F steel plate, thickness 1.2mm, wide 10mm, according to embodiment 1 (1), (3) step process, by (4) same diamond and metal powder are evenly distributed on the steel plate, get another same steel plate Overlay on it, process by (5), (6), (7), (8) step in embodiment 1, the composite body that obtains is wide 11.5mm, thickness 0.48mm, after grinding off flashing, width is 9.6mm, The hardness is HRB106.

[0027] The method of the present invention can also carry out multi-layer composite rolling after softening annealing and surface treatment of the monolithic composite body obtained after rolling, so as to obtain a multi-layer composite body. This method abandons the shortcomings of the traditional method, greatly reduces the metal cost, improves the production efficiency, simplifies the manufacturing process of the diamond-metal composite, improves the quality of the product, and its economic and social benefits are very significant.

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Abstract

The invention discloses a method for manufacturing a composite body of metal and diamond, comprising the following steps: diamond grits and metal powder bonds are arranged between two metal plates which can be copper plates or low-carbon steel plates, the metal plates are rolled to be in a flat pipe shape, braze welding and sealing are carried out on the round seaming part to manufacture a prefabricated piece, and multi-time cold rolling is carried out so that the thickness of the metal plates in a flat pipe shape is a little bigger than that of a particle and the metal plates in a flat pipe shape are sintered at the temperature ranging from 700-900 DEG C. The invention abandons a traditional powder metallurgy like method, instead, the capability feature that great difference exists between the rigidity of the diamond and the rigidity of the copper plate or the low-carbon plate is utilized, thereby the diamond embedded into a copper block or a low-carbon block in the rolling process and the combination of a little amount of metal powder bonds and high-speed flow deformation and large deformation rate which are unique in the rolling process enable the metal plates to be mutually welded so that the problem in the traditional method that the metal powder is prone to be oxidized to cause the sintering quality to be reduced is avoided. The invention is favorable for the mechanized and automated manufacturing and lowers the manufacturing cost.

Description

technical field [0001] The invention relates to a method for manufacturing a metal and diamond composite body. The method used employs rolling techniques. Background technique [0002] The metal and diamond composite is the working part of the metal bond diamond tool. Synthetic diamond is an artificial crystal, the particle diameter of the general application is less than 0.5mm, and the diamond hardness is as high as HV9000~10000. Its crystal structure is stable below 770°C under normal pressure and atmospheric conditions, and it will be oxidized when it exceeds 770°C. The oxidation will intensify as the temperature rises. . Due to the small size of industrial diamond particles, it is generally necessary to use a binder to bond the particles into a block in the process of manufacturing abrasive tools, which is a composite body. Metal, resin, ceramics, rubber or electroplating can be used as abrasive bond materials, and the main function is to inlay and clamp fine diamond ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K1/00B21B1/00
Inventor 王明智李晓普
Owner YANSHAN UNIV
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