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Welding process of VAR titanium alloy ingot castings

A welding process, titanium alloy technology, applied in welding equipment, welding accessories, metal processing equipment, etc., can solve the problems of poor quality stability of ingots, insufficient welding area, poor quality stability, etc.

Active Publication Date: 2019-05-03
西部超导材料科技股份有限公司
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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 welding process for VAR titanium alloy ingots with a specification of Φ820mm, so as to solve the problems of poor quality stability of welding seams, insufficient welding area, poor melting safety and poor quality stability of ingots in existing Φ820mm specification ingots.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1) Assembling several Φ820mm ingots in a Φ920mm crucible with the head facing down and the bottom facing up;

[0026] 2) Install the auxiliary electrode on the pneumatic chuck of the electrode rod, place the crucible in the vacuum consumable electric arc furnace, and seal the furnace for evacuation;

[0027] 3) The auxiliary electrode and the ingot are head welded in a vacuum consumable electric arc furnace. The welding current and time of the ingot head are set according to the parameters, as shown in Table 1, and the head is cooled for 30 minutes after welding;

[0028] Table 1 Welding parameter setting of ingot head

[0029] step

[0030] 4) The welding current in the middle part between the ingot and the ingot is as shown in Table 2, and the middle part is cooled for 45 minutes after welding.

[0031] Table 2 Welding parameter settings in the middle of the ingot

[0032] step

[0033] The Φ820mm ingot welded in this embodiment was cooled for 4...

Embodiment 2

[0035] 1) Assembling several Φ820mm ingots in a Φ920mm crucible with the head facing down and the bottom facing up;

[0036] 2) Install the auxiliary electrode on the pneumatic chuck of the electrode rod, place the crucible in the vacuum consumable electric arc furnace, and seal the furnace for evacuation;

[0037] 3) The auxiliary electrode and the ingot are head welded in a vacuum consumable electric arc furnace. The welding current and time of the ingot head are shown in Table 3, and the head is cooled for 40 minutes after welding;

[0038] Table 3 Welding parameter setting of ingot head

[0039] step

[0040] Step 4: The middle welding current between the ingot and the ingot is as shown in Table 4, and the middle welding is cooled for 50 minutes.

[0041] Table 4 Welding parameter settings in the middle of the ingot

[0042] step

[0043] The Φ820mm ingot welded in this example 2 was cooled for 50 minutes to check the quality of the weld seam. The we...

Embodiment 3

[0045] 1) Assembling several Φ820mm ingots in a Φ920mm crucible with the head facing down and the bottom facing up;

[0046] 2) Install the auxiliary electrode on the pneumatic chuck of the electrode rod, place the crucible in the vacuum consumable electric arc furnace, and seal the furnace for evacuation;

[0047] 3) The auxiliary electrode and the ingot are head welded in a vacuum consumable electric arc furnace. The welding current and time of the ingot head are as shown in Table 5, and the head is cooled for 35 minutes after welding;

[0048] Table 5 Welding parameter setting of ingot head

[0049] step

[0050] Step 4: The middle welding current between the ingot and the ingot is as shown in Table 6, and the middle welding is cooled for 60 minutes.

[0051] Table 6 Welding parameter settings in the middle of the ingot

[0052] step

[0053] The Φ820mm ingot welded in this example was cooled for 60 minutes to check the quality of the weld seam. The w...

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Abstract

The invention relates to a welding process of VAR titanium alloy ingot castings. The welding process comprises the following steps that 1, a plurality of large-specification ingot castings are sequentially assembled in a crucible in the mode that the head portions are downward and the bottoms are upward; 2, an auxiliary electrode is installed on an electrode rod pneumatic clamp head, the crucibleis arranged inside a vacuum self-consumption electric arc furnace, and the furnace is sealed and vacuumized; 3, the auxiliary electrode and the ingot castings in the step 1 are subjected to head welding in the vacuum self-consumption electric arc furnace; and 4, the ingot castings are subjected to middle welding. The current, voltage, stable arc and other parameters in the welding process are controlled in the step 3 and the step 4. The problems that existing ingot castings with the diameter of 820 mm are poor in welding weld joint quality, insufficient in welding area, poor in smelting safety, poor in quality stability and the like are solved.

Description

technical field [0001] The invention belongs to the technical field of non-ferrous metal processing, and in particular relates to a welding process for a Φ820mm VAR titanium alloy ingot. Background technique [0002] The vacuum consumable arc melting method (referred to as VAR method) has become the mainstream method used in the production of titanium alloy ingots. In order to obtain good ingot quality, titanium alloy ingots generally need to be remelted two to three times. Due to the crucible specification Before the secondary and tertiary remelting, it is often necessary to combine and weld multiple primary melting ingots or secondary melting ingots. Combination welding is usually carried out in a vacuum consumable electric arc furnace. The invention patent with the publication number of CN105611663A in the prior art relates to an electrode for a vacuum consumable furnace, a welding method for the electrode, and a vacuum consumable smelting repair using the electrode. A s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/00B23K9/02B23K9/235B23K9/32
Inventor 华正利刘鹏罗文忠杨超张晓明张军冯小飞王凯旋刘向宏
Owner 西部超导材料科技股份有限公司
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