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Method and device for evaluating burning loss performance of tungsten electrode

An evaluation method and technology for tungsten electrodes, which can be applied in measuring devices, material analysis by electromagnetic means, material weighing, etc., and can solve problems such as abnormal changes in quality and evaluation deviation of tungsten electrode welding burnout performance.

Active Publication Date: 2020-07-10
BEIJING MINING & METALLURGICAL TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to abnormal burning loss during the test process, the quality will change abnormally, which will affect the result of judging the degree of ablation of the tungsten electrode by mass loss, and cause deviations in the evaluation of the burning loss performance of the tungsten electrode welding

Method used

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  • Method and device for evaluating burning loss performance of tungsten electrode
  • Method and device for evaluating burning loss performance of tungsten electrode
  • Method and device for evaluating burning loss performance of tungsten electrode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] This embodiment provides a method for evaluating the burning performance of tungsten electrodes. Samples 1 to 6 in Table 1 are tested according to the following method:

[0069](1) Grind the tip of the tungsten electrode to be evaluated into a 45° cone angle, put it into the welding torch, and fix it in the electrode holding device of the welding torch. The extension length of the tungsten electrode is 3mm, and connect it to the DC power supply as the cathode , and connected together with the water-cooled copper anode into a welding path. Among them, the copper block of the water-cooled copper anode has a smooth surface with a surface roughness of Ra=0.8 μm, and the distance between the discharge end of the tungsten electrode to be evaluated and the water-cooled copper anode is 3 mm.

[0070] (2) Turn on the welding power supply and weld under an argon atmosphere. The purity of argon is 99.999%, and the flow rate of argon is 7L / min; cooling water is used in the welding ...

Embodiment 2

[0076] This example provides an evaluation method for the burning performance of tungsten electrodes. Samples 1 to 6 in Table 1 are tested using a method similar to that of Example 1. The difference is that in this example, the arc voltage to be up to 1.05 times U 1 , cut off the test current and stop arcing.

[0077] The test results of this example are similar to those of Example 1, and the judging results are the same as those of Example 1, which shows that the evaluation method of Example 2 can achieve accurate measurement of the burning loss performance.

Embodiment 3

[0079] This example provides an evaluation method for the burning performance of tungsten electrodes. Samples 1 to 6 in Table 1 are tested using a method similar to that of Example 1. The difference is that in this example, the arc voltage to be up to 1.15 times U 1 , cut off the test current and stop arcing.

[0080] The test results of this example are similar to those of Example 1, and the judgment results are the same as those of Example 1, which shows that the evaluation method of Example 3 can achieve accurate measurement of the burning loss performance.

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Abstract

The invention provides a method and a device for evaluating burning loss performance of a tungsten electrode, and relates to the field of refractory metal materials. The method for evaluating the burning loss performance of the tungsten electrode comprises the following steps: (1) taking a to-be-evaluated tungsten electrode, connecting the to-be-evaluated tungsten electrode as a cathode with a direct-current power supply, connecting the to-be-evaluated tungsten electrode with a water-cooled copper anode to form a welding path, making a test current be constant, and welding in an argon atmosphere; (2) monitoring a voltage between the cathode and the anode, and when the voltage rises to a preset voltage, cutting off the test current, wherein the preset voltage is any value from 1.05 times to1.15 times of an initial voltage when arcing is stable; and (3) recording evaluation indexes, and judging, wherein the evaluation indexes include one or two of burning loss time and a quality difference of the tungsten electrode from the initial voltage to the preset voltage. The method and the device for evaluating the burning loss performance of the tungsten electrode are easy to implement, anda quality change caused by abnormal welding burning loss of the tungsten electrode can be reduced as much as possible so as to accurately judge burning loss resistance of the tungsten electrode.

Description

technical field [0001] The present application relates to the field of refractory metal materials, in particular, to a method and device for evaluating the burning performance of a tungsten electrode. Background technique [0002] With the development of modern processing technology, automatic welding technology is more and more widely used, and tungsten electrodes are widely used in welding. However, in the existing automatic welding technology, as the welding time prolongs, the working tip of the tungsten electrode will burn out, which will lead to fluctuations in the welding current and unstable welding quality. Quality matters. [0003] At present, there is no uniform test standard for the burning performance test of tungsten electrodes. The commonly used test method is the mass loss method, that is, to measure the mass loss of tungsten electrodes after arcing for a certain period of time under simulated working conditions, and according to the quality The loss situati...

Claims

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Application Information

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IPC IPC(8): G01N27/00G01N5/00
CPCG01N27/00G01N5/00
Inventor 于月光杨建参王芦燕李曹兵章德铭彭鹰
Owner BEIJING MINING & METALLURGICAL TECH GRP CO LTD
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