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Argon arc welding method for exhaust casing components

A technology of argon arc welding and exhaust machine, which is applied in the direction of welding equipment, arc welding equipment, manufacturing tools, etc. It can solve the problems of welding cracks and low pass rate of parts, achieve uniform heating, good welding quality, and ensure the formation of weld seams Effect

Active Publication Date: 2018-06-26
CHINA HANGFA SOUTH IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides an argon arc welding method for an exhaust casing assembly to solve the technical problems that welding cracks often occur in the existing welding method and the qualified rate of parts is low

Method used

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  • Argon arc welding method for exhaust casing components
  • Argon arc welding method for exhaust casing components
  • Argon arc welding method for exhaust casing components

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] 1. Joint preparation

[0054] Machining is carried out on the part to be welded of the exhaust support 100, so that the wall thickness of the part to be welded of the exhaust support 100: the wall thickness of the part to be welded of the outer ring 200 of the exhaust section = 0.9: 1.1.

[0055] 2. Cleaning before welding

[0056] First, mechanically polish the exhaust bearing 100 to see metallic luster within 10mm to 15mm of the welded part, so as to remove the scale and so on. Then use a clean white silk cloth stained with analytical pure acetone to wipe the surface of the exhaust support 100 and the outer ring 200 of the exhaust section to be welded to remove dirt such as oil.

[0057] 3. Assembly combination

[0058] Put the exhaust casing assembly into the argon arc welding fixture, and then fix the assembled parts on the welding turntable of the automatic argon tungsten arc welding machine.

[0059] 4. Tack welding

[0060] The manual tungsten argon arc weldi...

Embodiment 2

[0073] 1. Joint preparation

[0074] Machining is performed on the part to be welded of the exhaust support 100 , so that the wall thickness of the part to be welded on the exhaust support 100 : the wall thickness of the part to be welded on the outer ring 200 of the exhaust section = 1:1.

[0075] 2. Cleaning before welding

[0076] First, mechanically polish the exhaust bearing 100 to see metallic luster within 10mm to 15mm of the welded part, so as to remove the scale and so on. Then use a clean white silk cloth stained with analytical pure acetone to wipe the surface of the exhaust support 100 and the outer ring 200 of the exhaust section to be welded to remove dirt such as oil.

[0077] 3. Assembly combination

[0078] Put the exhaust casing assembly into the argon arc welding fixture, and then fix the assembled parts on the welding turntable of the automatic argon tungsten arc welding machine.

[0079] 4. Tack welding

[0080] The manual tungsten argon arc welding me...

Embodiment 3

[0094] 1. Joint preparation

[0095] Machining is carried out on the part to be welded of the exhaust support 100, so that the wall thickness of the part to be welded on the exhaust support 100: the wall thickness of the part to be welded on the outer ring 200 of the exhaust section=1.1:0.9.

[0096] 2. Cleaning before welding

[0097] First, mechanically polish the exhaust support 100 to see metallic luster within 10mm to 15mm of the welded part, so as to remove the scale and so on. Then use a clean white silk cloth dipped in analytical pure acetone to wipe the surface of the exhaust support 100 and the outer ring 200 of the exhaust section to be welded to remove dirt such as oil.

[0098] 3. Assembly combination

[0099] Put the exhaust casing assembly into the argon arc welding fixture, and then fix the assembled parts on the welding turntable of the automatic argon tungsten arc welding machine.

[0100] 4. Tack welding

[0101] The manual tungsten argon arc welding met...

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Abstract

The invention discloses an exhauster casing component argon arc welding method. The method comprises the following steps: machining a to-be-welded part of an exhaust bearing to set a buffering transition section so that the ratio of the wall thickness at the to-be-welded part of the exhaust bearing to the wall thickness at the to-be-welded part at an outer ring of an exhaust section is (0.9-1.1): (0.9-1.1); performing positioned welding by using an argon tungsten-arc welding method after the exhaust bearing and the outer ring of the exhaust section are clamped; and continuously welding the to-be-welded parts of the exhaust bearing and the outer ring of the exhaust section under the conditions that the tungsten pole diameter is 3.2mm, the welding current is 80-95A, the pulse frequency is 3.5Hz, the pulse width is 27%, the argon flow on the frontage of the positive welding surface is 30-50L / min, and the argon flow on the back welding surface is 20-40L / min. The exhauster casing component argon arc welding method disclosed by the invention can guarantee good weld shaping, and can avoid the appearance of welding cracks through the improvement of a welding joint and optimized continuous welding condition; and the problem of low parts qualified rate is solved.

Description

technical field [0001] The invention relates to the field of welding exhaust casing components, in particular to an argon arc welding method for exhaust casing components. Background technique [0002] The metallurgical defect that has the greatest impact on welding quality during superalloy welding is welding hot crack. Superalloys have different degrees of sensitivity to welding hot cracks, especially nickel-based cast superalloys have higher crack sensitivity due to their complex chemical composition. The state, welding process parameters, etc. have a great influence on the formation of welding hot cracks. [0003] refer to figure 1 , the exhaust casing assembly of a certain type of aero-engine is composed of the exhaust support 10 and the outer ring 20 of the exhaust section through argon tungsten arc welding. Among them, the exhaust support 10 is made of K4169 cast superalloy material, and the outer ring 20 of the exhaust section is stamped from a GH4169 superalloy p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/167B23K9/235B23K9/095
CPCB23K9/095B23K9/164B23K9/167B23K9/235
Inventor 张明敏吴家云许静远
Owner CHINA HANGFA SOUTH IND CO LTD
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