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Surface nitriding treatment process of hard alloy cutter

A cemented carbide and surface nitriding technology, which is applied in the field of tool surface treatment, can solve the problems that the uniformity of the coating cannot be guaranteed, the cost of tool preparation is increased, and the coating equipment is complicated. The effect of good abrasiveness and low preparation cost

Inactive Publication Date: 2017-02-15
XINAN TOOLS GUIZHOU PROV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the film material is easily detached from the tool base
At the same time, the uniformity of the coating cannot be guaranteed
In addition, the coating equipment is relatively complex and expensive, which greatly increases the cost of tool preparation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] In this embodiment, the tool material is YT15 hard alloy, and the specific operation is as follows: First, put the YT15 hard alloy tool into an alcohol solution for ultrasonic cleaning for 20 minutes to remove oil, dust and sweat stains, etc., and then dry it with hot air ; Secondly, put the cleaned tool and the penetrating agent cerium chloride together into a vacuum furnace to evacuate to a vacuum, and then start to heat up; finally, when the temperature in the furnace reaches 580°C, feed 0.04MPa of ammonia gas, every Replace the ammonia gas every 0.5 hours, stop heating after 12 hours of heat preservation, and cool to room temperature with the furnace.

[0015] After testing, the surface layer of the tool treated by the present invention will form a uniform and dense nitriding layer with a thickness of 5 μm. This nitrided layer not only has high hardness, good corrosion resistance and wear resistance, but also penetrates into the surface layer of the matrix by 5 μm. ...

Embodiment 2

[0017] In this example, the tool material is YW1 cemented carbide, and the specific operation is as follows: First, put the YW1 cemented carbide tool into deionized water plus detergent solution for ultrasonic cleaning for 10 minutes, and then ultrasonically clean it with pure deionized water for 10 minutes Remove oil stains, dust and sweat stains, etc., and dry them with hot air; secondly, put the cleaned knives and penetrating agent lanthanum chloride together in a vacuum furnace to vacuum, and then start to heat up; finally, when the temperature in the furnace After reaching 540°C, feed 0.06MPa ammonia gas, replace the ammonia gas every 1 hour, stop heating after 16 hours of heat preservation, and cool to room temperature with the furnace.

[0018] After testing, the surface layer of the tool treated by the present invention will form a uniform and dense nitriding layer with a thickness of 6 μm. This nitriding layer not only has high hardness, good corrosion resistance and w...

Embodiment 3

[0020] In this embodiment, the tool material is YT5 cemented carbide, and its specific operation is as follows: first, put the YT5 cemented carbide tool into an acetone solution and perform ultrasonic cleaning for 20 minutes to remove oil stains, dust and sweat stains, etc., and dry it with hot air; Secondly, put the cleaned tool and lanthanum chloride into a vacuum furnace together to evacuate to a vacuum, and then start to heat up; finally, when the temperature in the furnace reaches 560°C, inject 0.08MPa of ammonia gas, every Replace the ammonia gas every 1 hour, stop heating after 20 hours of heat preservation, and cool to room temperature with the furnace.

[0021] After testing, the surface layer of the tool treated by the present invention will form a uniform and dense nitriding layer with a thickness of 5 μm. This nitriding layer not only has high hardness, good corrosion resistance and wear resistance, but also penetrates into the surface layer of the matrix by 5 μm. ...

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Abstract

The invention discloses a surface nitriding treatment process of a hard alloy cutter. The process includes the steps that firstly, the hard alloy cutter is placed in a solution to be ultrasonically cleaned for 10-20 min, oil dirt, dust, sweat stains and the like are removed, and the cutter is blow-dried with hot air; then the cleaned tool and an energizer are placed in a vacuum furnace to be vacuumized, and then heating is started for temperature rise; and finally when the temperature in the furnace reaches the specified temperature, ammonia gas of certain pressure is introduced, the ammonia gas is replaced at set intervals, heating is stopped after heat preservation is carried out for a period of time, and the cutter is cooled to room temperature in the furnace. A nitrided case with certain thickness can be formed on the surface layer of the hard alloy cutter treated through the surface nitriding treatment process, the nitrided case is high in hardness and good in corrosion resistance and abrasion resistance, is generated in the surface layer of a base body, and cannot fall off, and the service life of the tool is greatly prolonged; and meanwhile, the process is easy to operate, and the preparation cost is low.

Description

technical field [0001] The invention relates to a surface nitriding treatment process of a cemented carbide tool, belonging to the technical field of tool surface treatment. Background technique [0002] With the rapid development of science and technology, new materials and new processes are widely used in machinery manufacturing. The technical capabilities and demand characteristics of metal cutting tools have undergone more fundamental changes. High-precision, high-efficiency, high-reliability, and specialized (three high and one special) cutting tools will be the mainstream of the industry. Manufacturing companies have more and more requirements for cutting tools. higher. In order to better improve the cutting performance of the tool, meet various service conditions, and prolong the service life of the tool, tool manufacturers have adopted various coating technologies. By coating one or more layers of metal or non-metal material films with high hardness and good wear r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C8/24
CPCC23C8/24
Inventor 陆旭锋蒋道顺余金川李明祥
Owner XINAN TOOLS GUIZHOU PROV
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