A copper-free welding wire containing nano-ionic liquid lubricating coating and its preparation method

A nano-ionic, liquid lubrication technology, applied in welding equipment, manufacturing tools, welding media, etc., can solve the problem of affecting robot automatic welding accuracy, cost, efficiency and continuous operation, and can not simultaneously meet excellent lubrication, electrical conductivity and anti-rust performance. , low comprehensive performance of coatings or lubricants, to achieve good rust resistance and wire feeding, easy industrial promotion and production, and reduce arc ablation effects

Active Publication Date: 2022-01-14
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the most important factor that restricts the wide application of copper-free welding wire is the wear of the conductive tip, which leads to arc instability, increased wire feeding resistance, and arc interruption, which seriously affects the accuracy, cost, efficiency and continuous operation of robot automatic welding. , it is very important to improve the friction and wear properties of the contact tip and the copper-free welding wire
[0006] At present, the comprehensive performance of the coating or lubricant used in copper-free welding wire is low, and it cannot meet the excellent lubrication, electrical conductivity and anti-rust performance at the same time.
For some special coatings with better comprehensive performance, an additional conductive intermediate layer is required, and the preparation process is more complicated.

Method used

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  • A copper-free welding wire containing nano-ionic liquid lubricating coating and its preparation method
  • A copper-free welding wire containing nano-ionic liquid lubricating coating and its preparation method
  • A copper-free welding wire containing nano-ionic liquid lubricating coating and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A nano-ionic liquid lubricating oil for copper-free welding wire consisted of 2% modified nanocomposite, 37% ionic liquid, and 61% lubricating oil.

[0036] Preparation of modified nanocomposites:

[0037] (1) Sintering and mixing: Put the nano-powders in the mass percentage shown in Table 1 into the MITR polyurethane ball milling tank successively, and roll wet, dry (rotary evaporator) and pre-press (graphite mold) according to the parameters in Table 2, Then together with the graphite mold of the powder pre-compaction block, it is spark plasma sintered (SPS, -FCT-HP D250), to obtain a nanocomposite block; (2) crushing powder: coarsely crushing by a crusher and finely pulverizing by a high-energy ball mill to obtain a nanocomposite powder, and the ground nanocomposite is placed in a blast drying oven (GFL-45) drying, setting temperature is 90°C, heating power 1.5kw, ambient temperature 25°C, humidity 60%; (3) Surface functionalization: Weigh a certain amount of nanoco...

Embodiment 2

[0049] A nano-ionic liquid lubricating oil for copper-free welding wire consists of 5% modified nanocomposite, 40% ionic liquid and 55% lubricating oil.

[0050] Preparation of modified nanocomposites:

[0051] (1) Sintering and mixing: Put the nano-powders in the mass percentage shown in Table 1 into the MITR polyurethane ball milling tank successively, and roll wet, dry (rotary evaporator) and pre-press (graphite mold) according to the parameters in the table, and then Spark plasma sintering (SPS, -FCT-HP D250), to obtain a nanocomposite block; (2) crushing powder: coarsely crushing by a crusher and finely pulverizing by a high-energy ball mill to obtain a nanocomposite powder, and the ground nanocomposite is placed in a blast drying oven (GFL-45) drying, setting temperature is 150°C, heating power 1.5kw, ambient temperature 35°C, humidity 75%; (3) Surface functionalization: Weigh a certain amount of nanocomposites, add surface functional agent and The solution prepared w...

Embodiment 3

[0063] A nano-ionic liquid lubricating oil for copper-free welding wire consists of 8% modified nanocomposite, 60% ionic liquid and 32% lubricating oil.

[0064] Preparation of modified nanocomposites:

[0065] (1) Sintering and mixing: Put the nano-powders in the mass percentage shown in Table 1 into the MITR polyurethane ball milling tank successively, and roll wet, dry (rotary evaporator) and pre-press (graphite mold) according to the parameters in the table, and then Spark plasma sintering (SPS, -FCT-HP D250) to obtain nanocomposite blocks; (2) crushing and powder making: coarsely crushing with a crusher and finely crushing with a high-energy ball mill to obtain nanocomposite powders, and drying the ground nanocomposites in blast Dry in a box (GFL-45), set the temperature at 65°C, the heating power is 3kw, the ambient temperature is 40°C, and the humidity is 50%; (3) Surface functionalization: Weigh a certain amount of nanocomposites, add surface functional agents and T...

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Abstract

A copper-free welding wire containing a lubricating coating of nanometer ionic liquid and a preparation method thereof relate to the fields of chemical industry and welding materials. The coating is composed of 1%-10% of modified nanocomposite, 25%-80% of lubricating oil and 10%-65% of ionic liquid; the mass percentage of the coating in the welding wire is 0.01%-0.07%. Combining a variety of nanoparticles, using its synergistic lubrication, self-repairing effect and strong thermal stability, and organically combining conductive ionic liquids with lubricating oil, it is used for copper-free welding wire coating, which can make it include Excellent comprehensive properties such as self-repairing, anti-wear and anti-friction, etc., and it is convenient for industrial online preparation of copper-free welding wire with special coating properties.

Description

technical field [0001] The invention relates to the fields of chemical industry and welding consumables, in particular to a non-copper-plated welding wire containing nano-ionic liquid lubricating coating and a preparation method thereof. [0002] technical background [0003] In 2018, the total output of welding materials in my country was about 4.3 million tons, and gas-shielded solid welding wire accounted for more than 40%, surpassing welding rods to become the largest main body. As the application proportion of welding robots in welding production in my country continues to increase, the proportion of solid welding wire will further expand. The traditional gas-shielded solid welding wire mainly uses copper plating as the final surface treatment, which has good conductivity and lubricity, and the wear of the contact tip is small. However, there are a series of environmental protection problems, such as pickling and copper plating processes in the manufacturing process wil...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/365B23K35/40
CPCB23K35/365B23K35/404B23K35/0272
Inventor 李红陈梓嵩栗卓新祝静张玉林张冬妮闫维嘉
Owner BEIJING UNIV OF TECH
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