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Coated stick of spot welding electrode surface electric spark coating layer and its preparing method

A spot welding electrode, electric spark technology, applied in the direction of welding equipment, welding medium, manufacturing tools, etc.

Inactive Publication Date: 2005-03-02
HUBEI UNIV OF AUTOMOTIVE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The reason for the large fluctuation is that there are many defects in the CrN coating

Method used

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  • Coated stick of spot welding electrode surface electric spark coating layer and its preparing method
  • Coated stick of spot welding electrode surface electric spark coating layer and its preparing method
  • Coated stick of spot welding electrode surface electric spark coating layer and its preparing method

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0017] Example 1: 736 g of TiB 2 Powder, 185 grams of Ni powder, 61 grams of Mo powder, 9 grams of W powder and 9 grams of Co powder are evenly mixed and ball milled for 52 hours, and the above mixed powder that has been ball milled is added with 83 grams of viscose and pressed into the required rod After being degummed at 220°C, the rod is sintered at 1710°C in an Ar protective atmosphere with a pressure of 100kg for use.

example 2

[0018] Example 2: 756 g of TiB 2 Powder, 184 grams of Ni powder, 42 grams of Mo powder, 10 grams of W powder and 8 grams of Co powder are evenly mixed and ball milled for 60 hours, and the above mixed powder that has been ball milled is added with 75 grams of viscose and pressed into the required rod After being degummed at 270°C, the rods are sintered at 1780°C in a protective atmosphere with a pressure of 100kg Ar to be ready for use.

example 3

[0019] Example 3: 748 g of TiB 2 Powder, 156 grams of Ni powder, 85 grams of Mo powder, 6 grams of W powder and 5 grams of Co powder are uniformly mixed and ball milled for 52 hours, and the above mixed powder that has been ball milled is added to 91 grams of viscose and pressed into the required rod After being degummed at 190°C, the rod is sintered at 1680°C in an Ar protective atmosphere with a pressure of 100kg for use.

[0020] Example 4: 757 g of TiB 2 Powder, 162 grams of Ni powder, 71 grams of Mo powder, 7 grams of W powder and 3 grams of Co powder are evenly mixed and ball milled for 52 hours, and the above mixed powder that has been ball milled is added to 86 grams of viscose and pressed into the required rod After being degummed at 280°C, the rod is sintered at 1750°C in an Ar protective atmosphere with a pressure of 100kg for use.

[0021] As described in the attached picture: figure 1 , 2 TiB of the present invention 2 Welding rod and use TiB of the present i...

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PUM

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Abstract

The fused-on stick for the fused-on layer on the surface of spot welding electrode contains: Ni 12-24 wt%, Mo 4-10 wt%, W 0.15-1.0 wt% and Co 0.15-1.0 wt% except TiB2. The fused-on TiB2 stick is used to form TiB2 coating of 10-25 micron thickness and stable performance on the surface of spot welding electrode by means of surface electric spark fusing-on technology. The TiB2 coating can raise the adhesion performance and prolong the service life of the spot welding electrode and is practical.

Description

technical field [0001] The invention discloses a welding rod for electric spark welding coating on the surface of spot welding electrodes and a preparation method thereof, which belong to the technical field of assembly, connection and manufacturing in the machinery industry and the microelectronics industry. Background technique [0002] With the development of the automobile industry, ordinary steel plates can no longer meet the requirements of the continuous improvement of automobile corrosion resistance. Various coated steel sheets, especially galvanized steel sheets are more and more widely used in automobiles. When spot welding galvanized steel plate, the low melting point zinc reduces the contact resistance between the electrode and the steel plate. Compared with spot welding ordinary steel plate (non-coated steel plate), it is necessary to increase the welding current or prolong the welding time to ensure the welding quality. , which makes the electrode head bear hi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/14B22F3/16B23K35/24B23K35/32B23K35/40C22C29/14
CPCB22F2998/10C22C29/14B22F3/14B23K35/327B23K35/402B22F1/09B22F1/12B22F9/04B22F3/1021
Inventor 董仕节
Owner HUBEI UNIV OF AUTOMOTIVE TECH
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