Method for in-furnace welding of titanium alloy ingot

A titanium alloy and ingot furnace technology, applied in welding equipment, welding accessories, arc welding equipment and other directions, can solve the problems of unstable welding quality, easy formation of segregation, fluctuation of melting rate, etc., to achieve stable weld quality and improve welding quality. The effect of improving seam quality and reducing labor intensity

Active Publication Date: 2020-04-17
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

Although the stability of welding quality has been ensured to a certain extent, it takes a long time to cultivate talents and the inheritance is not good
[0005] Different operators use different time, current, voltage, arc stability and other parameters to carry out welding in the furnace according to their own work experience, which may easily lead to uneven welding quality in the furnace
This welding method that executes welding parameters based on personal experience can easily lead to instability in the size of the weld bead, the area of ​​the weld bead, the appearance quality of the weld, and the strength of the weld
The instability of welding quality will lead to the fluctuation of melting rate when smelting through the weld, and its fluctuation value often exceeds 1kg / min, which is easy to form defects such as segregation, which is not conducive to the production of high-quality titanium alloy ingots

Method used

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  • Method for in-furnace welding of titanium alloy ingot
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] The invention provides a method for welding in a titanium alloy ingot furnace, which specifically comprises the following steps:

[0051] Step 1. Machining the TC4 ingot with a diameter of Φ450mm to flatten;

[0052] Step 2: Assemble the ingot after flattening treatment in the copper crucible, then hoist it into the melting station, and carry out the operation of sealing the furnace;

[0053] Step 3. On the computer control interface, turn on the vacuum system to evacuate, the vacuum value reaches below 5Pa, the leak rate reaches below 1.2Pa / min, and prepare for welding in the furnace;

[0054] Step 4. Set the welding arc starting current to 4KA, the voltage to 24V, and the arc stabilization to 10A in the program;

[0055] Step 5. Turn on the power of the equipment and start arcing;

[0056] Step 6. According to Table 2, gradually input parameters to the equipment, including current, voltage, and arc stabilization, and observe the arc light changes in the furnace;

...

Embodiment 2

[0064] The invention provides a method for welding in a titanium alloy ingot furnace, which specifically comprises the following steps:

[0065] Step 1. Machining the TC4 ingot with a diameter of Φ650mm to flatten;

[0066] Step 2: Assemble the ingot after flattening treatment in the copper crucible, then hoist it into the melting station, and carry out the operation of sealing the furnace;

[0067] Step 3. On the computer control interface, turn on the vacuum system to evacuate, the vacuum value reaches below 5Pa, the leak rate reaches below 1.2Pa / min, and prepare for welding in the furnace;

[0068] Step 4. Set the welding arc starting current to 5KA, the voltage to 24.5V, and the arc stabilization to 10A in the program;

[0069] Step 5. Turn on the power of the equipment and start arcing;

[0070] Step 6. According to Table 3, gradually input parameters to the equipment, including current, voltage, and arc stabilization, and observe the arc light changes in the furnace;

...

Embodiment 3

[0078] The invention provides a method for welding in a titanium alloy ingot furnace, which specifically comprises the following steps:

[0079] Step 1. Machining the TC21 ingot with a diameter of Φ560mm to flatten;

[0080] Step 2: Assemble the ingot after flattening treatment in the copper crucible, then hoist it into the melting station, and carry out the operation of sealing the furnace;

[0081] Step 3. On the computer control interface, turn on the vacuum system to evacuate, the vacuum value reaches below 5Pa, the leak rate reaches below 1.2Pa / min, and prepare for welding in the furnace;

[0082] Step 4. Set the welding arc starting current to 4KA, the voltage to 24.5V, and the arc stabilization current to 10A in the program;

[0083] Step 5. Turn on the power of the equipment and start arcing;

[0084] Step 6. According to Table 4, gradually input parameters to the equipment, including current, voltage, and arc stabilization, and observe the arc light changes in the f...

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Abstract

The invention belongs to the technical field of titanium alloy ingot casting and smelting and specifically relates to the method for in-furnace welding of a titanium alloy ingot. Aiming at in-furnacewelding of the titanium alloy ingot with a specification of phi450mm-phi650mm, definite parameters such as welding time, current, voltage and stable arc are given, so stability and reliability of an in-furnace welding course are ensured. An original welding method of instant adjustment of welding parameters based on experience of an operator is optimized to a method for welding which can be completed by direct parameter inputting of the operator, so welding seam quality is improved; labor strength is reduced; and stability of a smelting speed of over-welding seam smelting is ensured. The method has the beneficial effects that operations are easy and can be realized easily; influences of differences in operator experience are eliminated; operations are completed by equipment step by step according to instructions; and welding seam quality is very stable

Description

technical field [0001] The invention belongs to the technical field of smelting titanium alloy ingots, and in particular relates to a furnace welding method for titanium alloy ingots. Background technique [0002] Titanium alloy has the advantages of high specific strength (strength / density), good high temperature performance, excellent corrosion resistance, excellent fatigue performance and fracture toughness, etc. It is widely used in aviation, aerospace, medical treatment, ships and other fields, and In recent years, it has also been used in bicycles and household equipment. At present, the global titanium alloy mainly adopts the vacuum consumable electric arc furnace (VAR) for the smelting of titanium alloy. For titanium alloys used in aerospace, the smelting process generally adopts three times of smelting, and the specific process route is: "mixing of intermediate alloys → pressing electrode blocks → assembling electrode blocks → welding self-consumable electrodes → o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/02B23K9/095B23K9/32
CPCB23K9/02B23K9/095B23K9/32
Inventor 刘鹏赵小花华正利梁敬凡孙治中罗文忠
Owner 西部超导材料科技股份有限公司
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