Ion Nitriding Equipment for Titanium Alloy Parts

A technology of nitriding tooling and titanium alloys, applied in metal material coating process, coating, solid-state diffusion coating and other directions, can solve the problems of affecting the geometric accuracy of parts, out of tolerance of parts, large temperature fluctuations, etc., to improve production Efficiency, reduction of deformation difference and degree of deformation, effect of electric field uniformity

Active Publication Date: 2021-11-09
HARBIN DONGAN ENGINE GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] When plasma nitriding is carried out in batches for easily deformable parts that require precise control of deformation, due to the working principle of the ion nitriding furnace, the temperature of the effective working area in the traditional ion nitriding furnace fluctuates greatly. The difference in the space placement position in the space will cause the difference in the degree of deformation, which directly affects the geometric accuracy of the parts, and even some parts are deformed out of tolerance and become waste products.

Method used

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  • Ion Nitriding Equipment for Titanium Alloy Parts
  • Ion Nitriding Equipment for Titanium Alloy Parts
  • Ion Nitriding Equipment for Titanium Alloy Parts

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Take a certain specification of titanium alloy bearing bushing as an example, the bushing material is TA7, the ion nitriding temperature of this part is 840℃, and the bushing size is shown in the appendix figure 1 shown.

[0019] For optional tooling, please refer to figure 2 , Make sure to use TC4 material tooling of φ260mm×150mm, and drill holes of φ30mm in the center of the upper and lower bottoms of the tooling. See the attachment for other surface opening methods of the tooling. figure 2 .

[0020] There are several grooves on the wall of the cylinder, and the bottom surface is provided with a centrally symmetric array hole. The several grooves are parallel to each other in the longitudinal direction and on the same circumference in the transverse direction. By this method, the nitrogen-containing particles in the ion nitriding furnace can be uniformly entered into the tooling. internal.

[0021] The titanium alloy bearing bushing is placed at the geometric ce...

Embodiment 2

[0024] Take the titanium alloy bearing bushing of the same specification as an example, the bushing material is TA7, and the ion nitriding temperature of this part is 840℃. In order to improve production efficiency, combined with the effective working area height of the ion nitriding furnace (φ600mm×800mm), choose to use 3 tooling, the tooling and the tooling are in direct contact, please refer to image 3 and Figure 4 .

[0025] The titanium alloy bearing bushing, the tooling and the three cathode discs are concentric, which can effectively ensure that the parts are heated evenly in the ion nitriding furnace, and improve the local uniformity of the furnace temperature in each tooling.

[0026] In addition to the temperature-controlling thermocouple, insert two temperature-measuring thermocouples upward through the hole of the tooling base plate, and enter into the accessories of the upper two tooling parts for temperature measurement. The temperature-controlling and temper...

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Abstract

The invention belongs to titanium alloy heat treatment technology, in particular to a tool for reducing ion nitriding deformation of titanium alloy thin-walled rotary parts. The tooling is made of titanium alloy TC4. The tooling is a cylindrical structure, and the wall and the bottom plate are separated structures, and the wall is buckled on the bottom plate. There are several grooves on the wall, the grooves are parallel to each other in the longitudinal direction, and On the same circumference, the bottom surface is provided with centrally symmetrical array holes. The temperature measuring thermocouple is inserted through the array holes reserved on the bottom plate of the tooling and is adjacent to the parts in the tooling. Only one part is placed in each tooling to reduce the deformation difference and degree of deformation of the same batch of parts after ion nitriding. During work, tooling, titanium alloy parts and cathode disk are concentric. It can ensure that the voltage consistency of each part of the inner surface of the tooling is good, and the electric field in the tooling is relatively uniform. According to the actual production, several tools of the same specification can be stacked vertically and coaxially to improve production efficiency.

Description

technical field [0001] The invention belongs to the titanium alloy ion nitriding technology, and relates to an ion nitriding tool for titanium alloy parts. Background technique [0002] When ion nitriding is carried out in batches of easily deformed parts that require precise control of deformation, due to the working principle of the ion nitriding furnace, the temperature of the effective working area in the traditional ion nitriding furnace fluctuates greatly. The difference in the position of the inner space will cause the difference in the degree of deformation, which directly affects the geometric accuracy of the parts, and even some parts are out of tolerance and become waste. SUMMARY OF THE INVENTION [0003] The purpose of the present invention is to provide a tooling that can effectively reduce the influence of temperature fluctuations of ion nitridation of titanium alloy parts and ensure the geometric accuracy of the parts. [0004] The technical solution of the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C8/36
CPCC23C8/36
Inventor 孙振淋吴彦芬钱珏辛玉武
Owner HARBIN DONGAN ENGINE GRP
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