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Preparation method of diamond particle reinforced composite tool material for cutting building stones

A diamond particle-reinforced composite technology, which is applied in the field of preparation of diamond particle-reinforced composite tool materials for cutting stones, can solve the problems of high heat generation of cutting tools, shortened tool life, secondary damage of cutting tools, etc., and achieves good protection. , slow down wear speed, excellent thermal conductivity effect

Active Publication Date: 2020-06-12
揭阳空港经济区拓金金刚石工具有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At this stage, there are a series of problems in the cutting of stone, such as low quality of workers, poor working environment, complex processing conditions, etc.
In the process of cutting stone, the rotating speed of the cutting tool is high and the depth of the cutting tool is large. The overall processing method of the workers is relatively direct and rough, and the wear, heating and failure of the cutting tool are rarely considered, which leads to a large amount of heat generation and loss of the cutting tool. At the same time, a large number of stone particles with uneven particle sizes will be produced during the stone cutting process, which will cause secondary damage to the cutting tool, which not only greatly shortens the service life of the tool, but also indirectly increases the processing cost of the product
Existing cutting tool materials (traditional cutting tool materials and new cutting tool materials) are not practical in the complex working conditions of cutting stone, and cannot meet the conditions of stone cutting. Therefore, it is necessary to study a low-cost, high thermal conductivity, and excellent wear resistance New composite cutting tool materials with high toughness are imperative

Method used

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  • Preparation method of diamond particle reinforced composite tool material for cutting building stones

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 1. adopt particle size as 160 mesh copper powder, 200 mesh zinc powder, 200 mesh iron powder and artificial diamond particles with an average particle diameter of 200 μm as raw material, the mass percent of each component is: zinc powder: 18%; iron powder: 38% ; Synthetic diamond particles: 9%, the balance is copper and unavoidable impurities. First mix the weighed copper powder, zinc powder and artificial diamond particles into the polyurethane ball mill tank, use 4mm, 6mm, 8mm agate balls, the ball-to-material ratio is 3:5, and fill them with argon protection for ball milling. The ball milling time and speed were 6h and 300r / min, respectively, and the forward and reverse mixing was used, and the interval time was 30s. After the mixing is completed, put the copper-based composite powder into a vacuum bag, and vacuumize it for sealing.

[0024] ② Place the copper-based composite powder and iron powder in a 15mm×22mm graphite mold for compaction. First lay a layer of c...

Embodiment 2

[0026] ①Adopt 160 mesh copper powder, 200 mesh zinc powder, 200 mesh iron powder and artificial diamond particles with an average particle diameter of 200 μm as raw materials, and the mass percentages of each component are: zinc powder: 19%; iron powder: 37.5% ; Synthetic diamond particles: 11%, the balance is copper and unavoidable impurities. First mix the weighed copper powder, zinc powder and artificial diamond particles into the polyurethane ball mill tank, use 4mm, 6mm, 8mm agate balls, the ball-to-material ratio is 3:5, and fill them with argon protection for ball milling. The ball milling time and speed were 6h and 300r / min, respectively, and the forward and reverse mixing was used, and the interval time was 30s. After the mixing is completed, put the copper-based composite powder into a vacuum bag, and vacuumize it for sealing.

[0027] ② Place the copper-based composite powder and iron powder in a 15mm×22mm graphite mold for compaction. First lay a layer of copper-...

Embodiment 3

[0029]①Adopt 160 mesh copper powder, 200 mesh zinc powder, 200 mesh iron powder and artificial diamond particles with an average particle diameter of 200 μm as raw materials, and the mass percentage of each component is: zinc powder: 20%; iron powder: 37% ; Synthetic diamond particles: 10%, the balance is copper and unavoidable impurities. First mix the weighed copper powder, zinc powder and artificial diamond particles into the polyurethane ball mill tank, use 4mm, 6mm, 8mm agate balls, the ball-to-material ratio is 3:5, and fill them with argon protection for ball milling. The ball milling time and speed were 6h and 300r / min, respectively, and the forward and reverse mixing was used, and the interval time was 30s. After the mixing is completed, put the copper-based composite powder into a vacuum bag, and vacuumize it for sealing.

[0030] ② Place the copper-based composite powder and iron powder in a 15mm×22mm graphite mold for compaction. First lay a layer of copper-based...

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Abstract

The invention discloses a preparation method of a diamond particle reinforced composite tool material for cutting building stones. The method is characterized in that a re-pressing re-sintering technology in a powder metallurgy method is adopted, copper powder, iron powder, zinc powder and artificial diamond particles are weighed proportionally at first, the raw materials, except for the iron powder are mixed, then, the copper-based composite powder and the iron powder are arranged in a graphite mold for compaction, the initial pressure is 200 MPa, the formed blank is placed into a tube furnace, the temperature inside the furnace is increased to 500 DEG C and kept constant for 2 h, then, the compacted blank is re-pressed under the pressure of 750 MPa, finally, the temperature is increasedto 740-780 DEG C and kept constant for 2 h, secondary sintering is performed, and finally the diamond particle reinforced composite tool material is obtained. The material has the excellent heat conductivity, wear resistance, high strength, good tenacity and low production cost and will have the good economic and social benefits after being applied and popularized.

Description

technical field [0001] The invention belongs to the technical field of particle-reinforced metal matrix composite materials, and in particular relates to a method for preparing a diamond particle-reinforced composite tool material for cutting stones. Background technique [0002] In the field of cutting tools, traditional tool materials include tool steel, high-speed steel, and cemented carbide. Among them, tool steel has poor heat resistance and is usually only used for hand tools and some simple tools with low cutting speed, such as manual taps, files, saw blades, etc. Compared with tool steel, high-speed steel has good heat resistance and high hardness. The allowable cutting speed is 1 to 3 times that of carbon tool steel, and its service life is 10 to 40 times higher than that of tool steel; wear resistance, The strength and toughness are good, the bending strength is 3 to 5 times that of ordinary cemented carbide, and the impact toughness is 6 to 10 times that of cemen...

Claims

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Application Information

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IPC IPC(8): C22C26/00C22C30/02C22C30/06C22C1/05C22C1/10
CPCC22C26/00C22C30/02C22C30/06C22C1/05
Inventor 成小乐李滋阳符寒光屈银虎杨丹峰杨建
Owner 揭阳空港经济区拓金金刚石工具有限公司