Flux-cored wire for welding of titanium-steel dissimilar metal sheet and preparation method of flux-cored wire

A technology for welding dissimilar metals and sheets, applied in welding equipment, metal processing equipment, welding/welding/cutting items, etc., it can solve the problem that titanium steel cannot be welded butt joint, etc., to facilitate mass production, less alloying elements, Simple preparation process

Inactive Publication Date: 2017-11-24
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a flux-cored welding wire for welding titanium-steel dissimilar metal sheets, which solves the problem that titanium steel cannot be welded butt joint

Method used

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  • Flux-cored wire for welding of titanium-steel dissimilar metal sheet and preparation method of flux-cored wire
  • Flux-cored wire for welding of titanium-steel dissimilar metal sheet and preparation method of flux-cored wire
  • Flux-cored wire for welding of titanium-steel dissimilar metal sheet and preparation method of flux-cored wire

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preparation example Construction

[0029] The preparation method of the above-mentioned titanium-steel dissimilar metal sheet welding flux-cored wire, the specific steps are as follows:

[0030] Step 1: Weigh 60% to 80% of V powder and 20% to 40% of Ni powder respectively by mass percentage, and the sum of the mass percentages of the above components is 100%;

[0031] Step 2: Put the V powder and Ni powder weighed in step 1 into a ball mill, and after ball milling for 8 hours, obtain a uniformly mixed drug core powder; heat it in a vacuum heating furnace with a vacuum degree of 0.1 Pa and a heating temperature of 200 ℃-300℃, heat preservation time 3h-5h, remove the crystal water in the medicine powder, and obtain the medicine core powder;

[0032] Step 3: Wrap the flux core powder prepared in step 2 in the copper tape through the flux cored wire making machine. The diameter of the first drawing abrasive tool is 2.6mm. Wipe clean with alcohol;

[0033] Step 4: After the first process of drawing is completed, t...

Embodiment 1

[0036] Step 1: Weigh 60% V powder and 40% Ni powder respectively according to requirements, and the sum of the mass percentages of the above components is 100%;

[0037] Step 2: Put the V powder and Ni powder weighed in step 1 into a ball mill, and ball mill for 8 hours to obtain a uniformly mixed drug core powder; heat it in a vacuum heating furnace with a vacuum degree of 0.1 Pa and a heating temperature of 200°C , heat preservation time 3h, remove the crystal water in the medicine powder, obtain medicine core powder;

[0038] Step 3: Wrap the flux core powder prepared in step 2 in the copper tape through the flux cored wire making machine, the filling amount is controlled at 15%. Before a process, the copper strip is wiped clean with alcohol;

[0039] Step 4: After the first process of drawing is completed, the hole diameter of the abrasive tool is changed to 2.3mm, 2.0mm, 1.8mm, 1.6mm, 1.42mm, 1.34mm, 1.28mm, 1.24mm, and finally the flux cored wire is drawn to the diamete...

Embodiment 2

[0044] Step 1: Weigh 70% V powder and 30% Ni powder respectively according to requirements, and the sum of the mass percentages of the above components is 100%;

[0045] Step 2: Put the V powder and Ni powder weighed in step 1 into a ball mill, and ball mill for 8 hours to obtain a uniformly mixed drug core powder; heat it in a vacuum heating furnace with a vacuum degree of 0.1Pa and a heating temperature of 250°C , the holding time is 3.5h, the crystal water in the medicine powder is removed, and the medicine core powder is obtained;

[0046] Step 3: Wrap the flux core powder prepared in step 2 in the copper tape through the flux cored wire making machine, the filling amount is controlled at 18%. Before a process, the copper strip is wiped clean with alcohol;

[0047]Step 4: After the first process of drawing is completed, the hole diameter of the abrasive tool is changed to 2.3mm, 2.0mm, 1.8mm, 1.6mm, 1.42mm, 1.34mm, 1.28mm, 1.24mm, and finally the flux cored wire is drawn ...

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Abstract

The invention discloses a flux-cored wire for welding of a titanium-steel dissimilar metal sheet. The flux-cored wire comprises a flux core and a metal sheath. The flux core comprises, by mass percentage, 60-80% of V powder and 20-40% of Ni powder, wherein the sum of the mass percentage of the components is 100%. The preparation method comprises the steps that the V powder and Ni powder are sintered after being mixed and then are wrapped with a copper strip, and the flux-cored wire is obtained after drawing. A welding joint obtained by the flux-cored wire has the excellent toughness. The number of the alloy elements of the flux-cored wire is small, the preparation process is simple, and the large-scale mass production is facilitated.

Description

technical field [0001] The invention belongs to the technical field of metal material welding, and in particular relates to a flux-cored wire for welding titanium-steel dissimilar metal sheets, and also relates to a preparation method of the flux-cored wire. Background technique [0002] Titanium is often used in chemical industry, power station and other fields because of its excellent corrosion resistance and specific strength, while ordinary steel is cheap and has good mechanical properties. However, during the butt welding process of titanium and steel, since the content of Fe in the weld will exceed the solubility in titanium, it is easy to form a hard and brittle intermetallic compound TiFe. 2 and Ti 2 Fe, the resulting welded joints are highly susceptible to cracking. Therefore, titanium steel cannot be welded directly. At present, there are only a few reports on the welding process of titanium steel dissimilar metals, and the existing titanium steel dissimilar met...

Claims

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Application Information

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IPC IPC(8): B23K35/30B23K35/40B23K103/18
CPCB23K35/302B23K35/40B23K2103/18
Inventor 张敏王晓伟慕二龙张涛史杰
Owner XIAN UNIV OF TECH
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