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Welding method of molybdenum-copper alloy and iron-based high-temperature alloy and application

A technology of iron-based superalloy and molybdenum-copper alloy, applied in welding equipment, welding medium, welding equipment, etc., can solve problems such as welding delay cracks, improve weldability, increase tensile strength, and avoid serious oxidation effects

Active Publication Date: 2016-10-12
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the current molybdenum-copper alloy and iron-based superalloy are prone to welding delay cracks, and the traditional argon tungsten arc welding operation cannot be directly used for the welding of the above two alloys, and provides a molybdenum-copper alloy and iron A welding method based on superalloys, which has the advantages of simple method, good welding quality and high welding efficiency, and can avoid welding delay cracks

Method used

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  • Welding method of molybdenum-copper alloy and iron-based high-temperature alloy and application
  • Welding method of molybdenum-copper alloy and iron-based high-temperature alloy and application

Examples

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Effect test

Embodiment 1

[0040] Double-sided wire-filled argon arc welding of Mo60-Cu40 molybdenum-copper alloy and GH1131 iron-based superalloy joint, the size of the molybdenum-copper alloy plate is 100mm×50mm×3mm, and the size of the GH1131 iron-based superalloy plate is 100mm×50mm ×3mm.

[0041] (1) Preparation before welding

[0042] Use a grinding wheel to process the molybdenum-copper alloy and the iron-based superalloy into double V-shaped grooves, leaving a 0.8mm blunt edge; Remove all dust remaining on the surface, then wipe with 100% alcohol and dry.

[0043] (2) Front side welding

[0044] The molybdenum-copper alloy and the iron-based superalloy are assembled by butt tack welding, and the assembly gap is 1.0mm; the direct current filling wire tungsten argon arc welding method is used to control the tungsten argon arc to the side of the molybdenum-copper alloy, and the welding heat input is 12kJ / cm, the argon gas flow rate is 25L / min; the tungsten electrode is cerium tungsten electrode...

Embodiment 2

[0054] Double-sided wire-filled argon arc welding of Mo60-Cu40 molybdenum-copper alloy and GH1131 iron-based superalloy joint. The size of the molybdenum-copper alloy plate is 100mm×50mm×5mm, and the size of the GH1131 iron-based superalloy plate is 100mm×50mm ×5mm.

[0055] (1) Preparation before welding

[0056] Use a grinding wheel to process the molybdenum-copper alloy and the iron-based superalloy into double V-shaped grooves, leaving a 1.0mm blunt edge; Remove all dust remaining on the surface, then wipe with 100% alcohol and dry.

[0057] (2) Front side welding

[0058] The molybdenum-copper alloy and the iron-based superalloy are assembled by butt tack welding, and the assembly gap is 2.0mm; the direct current filling wire tungsten argon arc welding method is used to control the tungsten argon arc to the molybdenum-copper alloy side, and the welding heat input is 13kJ / cm, the argon gas flow rate is 25L / min; the tungsten electrode is cerium tungsten electrode; the f...

Embodiment 3

[0068] Double-sided wire-filled argon arc welding of Mo60-Cu40 molybdenum-copper alloy and GH1131 iron-based superalloy joint, the size of the molybdenum-copper alloy plate is 100mm×50mm×2mm, and the size of the GH1131 iron-based superalloy plate is 100mm×50mm ×2mm.

[0069] (1) Preparation before welding

[0070] Use metallographic sandpaper to polish the molybdenum-copper alloy and iron-based superalloy surface to be welded and its surroundings, blow off all powder debris remaining on the surface, then wipe and dry with 100% alcohol.

[0071] (2) Front side welding

[0072] The molybdenum-copper alloy and the iron-based superalloy are assembled by butt tack welding, and the assembly gap is 0.5mm; the direct current filling wire tungsten argon arc welding method is used to control the tungsten argon arc to the molybdenum-copper alloy side, and the welding heat input is 11kJ / cm, the argon gas flow rate is 20L / min; the tungsten electrode is cerium tungsten electrode; the fil...

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Abstract

The invention discloses a welding method of molybdenum-copper alloy and iron-based high-temperature alloy and application. The welding method comprises the steps that the molybdenum-copper alloy and the iron-based high-temperature alloy which are cleaned before welding are subjected to butt-joint positioning welding assembly, then front side welding is conducted by adopting filler wire argon tungsten-arc welding, back side welding is conducted after front side welding is finished, and argon tungsten-arc welding is controlled to deviate towards the molybdenum-copper alloy side. Welding is conducted on two sides of welding beads, when welding is conducted on the back-side welding bead, the cooling speed decreasing effect can be achieved on the front-side welding bead, and meanwhile the residual temperature of front-side welding bead achieves the preheating effect on welding of the back-side welding bead; through temperature interaction of the front-side welding bead and the back-side welding bead, the phenomenon that delayed welding cracks are generated at the joint can be avoided, and the problem that the molybdenum-copper alloy and the iron-based high-temperature alloy are likely to generate welding cracks is solved.

Description

technical field [0001] The invention relates to a welding process of a molybdenum-copper alloy and a high-temperature alloy, in particular to a welding method and application of a molybdenum-copper alloy and an iron-based high-temperature alloy. Background technique [0002] Molybdenum-copper alloy is a high-temperature material with fine structure, good electrical and thermal conductivity, and small thermal expansion coefficient obtained by using high-quality molybdenum powder and oxygen-free copper powder and hot isostatic pressing (high temperature sintering-copper infiltration) process. Since the molybdenum-copper alloy has adjustable composition, it has the advantages of adjustable thermal conductivity and thermal expansion coefficient. Iron-based superalloy is an austenitic alloy with iron as the matrix and containing a certain amount of chromium and nickel. It has certain strength, oxidation resistance and gas corrosion resistance at a high temperature of 600-800 ° C....

Claims

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Application Information

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IPC IPC(8): B23K9/167B23K9/235B23K35/30B23K31/12B23K9/02B23K103/18
CPCB23K9/02B23K9/167B23K9/235B23K31/12B23K35/304B23K2103/18
Inventor 王娟李亚江
Owner SHANDONG UNIV
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