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A kind of solder and method for welding molybdenum-rhenium alloy and steel

A technology of molybdenum-rhenium alloy and brazing material, which is applied in the field of welding molybdenum-rhenium alloy and steel, and the field of brazing material for welding molybdenum-rhenium alloy and steel. Problems, to achieve no forming defects, avoid processing damage, good forming effect

Active Publication Date: 2021-07-13
ATTL (BEIJING) ADVANCED MATERIALS CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, when molybdenum-rhenium alloy is welded to steel, due to the large performance gap between the two, it is difficult to weld
The patent application with the publication number CN102489813A discloses a vacuum active brazing process for molybdenum-copper alloy and stainless steel. Ag-Cu-Ti is used as the brazing filler metal. The welding surface is simple and flat, and the Ag-Cu-Ti solder is easy to cause Ti and steel to form a brittle phase, which is not conducive to the combination of molybdenum-rhenium alloy and steel parts; high

Method used

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  • A kind of solder and method for welding molybdenum-rhenium alloy and steel

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The components and content of the solder powder are: Cr 10wt%, Co 3.5wt%, B 1wt%, the balance is Ni, and the particle size of the solder powder is 200-300 mesh.

[0039] The content of rhenium in the molybdenum-rhenium alloy in this embodiment is 45 wt%, and the stainless steel is S31608.

[0040] The specific welding process is as follows:

[0041] (1) The welding surface of the stainless steel parts is polished, the roughness is below Ra0.8, and then pickled (the pickling solution formula is: nitric acid: hydrofluoric acid: water = 2:1:5, volume ratio), water washing, Vacuum dry at 80°C for 1h. The welding surface of the molybdenum-rhenium alloy parts is ground, the roughness is below Ra0.8mm, and then annealed at 900°C for 1h in a hydrogen atmosphere.

[0042] (2) The brazing material is evenly laid on the molybdenum-rhenium alloy parts or stainless steel parts to be welded, the thickness is controlled at about 0.8mm, tooling is used up and down, and a pressure of ...

Embodiment 2

[0049] The components and content of the solder powder are: Cr 9wt%, Co3.5wt%, B 2wt%, the balance is Ni, and the particle size of the solder powder is 200-300 mesh.

[0050] The content of rhenium in the molybdenum-rhenium alloy in this embodiment is 45 wt%, and the stainless steel is S31608.

[0051] The specific welding process is as follows:

[0052] (1) The welding surface of the stainless steel parts is polished, the roughness is below Ra0.8, and then pickled (the pickling solution formula is: nitric acid: hydrofluoric acid: water = 2:1:5, volume ratio), water washing, Vacuum dry at 80°C for 1h. The welding surface of the molybdenum-rhenium alloy parts is ground, the roughness is below Ra0.8mm, and then annealed at 900°C for 1h in a hydrogen atmosphere.

[0053] (2) The brazing material is evenly laid on the molybdenum-rhenium alloy parts or stainless steel parts to be welded, the thickness is controlled at about 0.8mm, tooling is used up and down, and a pressure of 4M...

Embodiment 3

[0060] The components and content of the solder powder are: 6.5wt% of Cr, 3.5wt% of Co, 3wt% of B, the balance is Ni, and the particle size of the solder powder is 200-300 mesh.

[0061] The content of rhenium in the molybdenum-rhenium alloy in this embodiment is 45 wt%, and the stainless steel is S31608.

[0062] The specific welding process is as follows:

[0063] (1) The welding surface of the stainless steel parts is polished, the roughness is below Ra0.8, and then pickled (the pickling solution formula is: nitric acid: hydrofluoric acid: water = 2:1:5, volume ratio), water washing, Vacuum dry at 80°C for 1h. The welding surface of the molybdenum-rhenium alloy parts is ground, the roughness is below Ra0.8mm, and then annealed at 900°C for 1h in a hydrogen atmosphere.

[0064] (2) The brazing material is evenly laid on the molybdenum-rhenium alloy parts or stainless steel parts to be welded, the thickness is controlled at about 0.8mm, tooling is used up and down, and a pr...

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Abstract

The invention discloses a solder and a method for welding molybdenum-rhenium alloy and steel, belonging to the technical field of welding. The solder includes the following components in weight percent: Cr 5.5-10.5%, Co 3-8%, B 0.5-3%, and the balance is Ni. The welding method is vacuum brazing treatment, the welding temperature is 1150-1250°C, the welding temperature holding time is 30-60min; the vacuum degree is (5-9)×10 ‑3 Pa. The connection of the molybdenum-rhenium alloy and the stainless steel alloy can be realized by adopting the preferred brazing filler metal and the welding process of the present invention, the surface of the welded joint is well formed without forming defects, and the joint strength is greater than 250Mpa.

Description

technical field [0001] The invention relates to the field of welding technology, in particular to a solder used for welding molybdenum-rhenium alloy and steel and a method for welding molybdenum-rhenium alloy and steel. Background technique [0002] Adding rhenium to molybdenum can significantly reduce the ductile-brittle transition temperature of molybdenum, increase the recrystallization temperature, improve room temperature plasticity and high temperature strength; at the same time, it can avoid the faster work hardening of pure rhenium. Molybdenum-rhenium alloys avoid their respective disadvantages and form a very ideal elastic material. Due to their good high temperature performance and elastic properties, they are widely used in important process sectors such as aerospace, nuclear energy, electronics, and military industry. The connection between molybdenum-rhenium alloy and steel is a practical problem that needs to be solved urgently in practical applications. On the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/30B23K1/008B23K1/20B23K103/18
CPCB23K1/008B23K1/20B23K35/304B23K2103/18
Inventor 陈福鸽张莹莹熊宁王广达
Owner ATTL (BEIJING) ADVANCED MATERIALS CO LTD
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