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Process method for improving inertia friction welding weld joint quality of GH4151

A GH4151, inertial friction welding technology, applied in the direction of welding/welding/cutting items, manufacturing tools, welding equipment, etc., can solve the problems of welding flash fracture, flash discontinuous distribution, etc., and achieve the elimination of welding stress and temperature bearing capacity Improve, improve the effect of thrust

Active Publication Date: 2021-12-10
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention is a process improvement aimed at the crack defects existing in the welding seam of GH4151 alloy welded in the prior art, the crack at the tip of the flash extends into the base of the weld seam, the fracture of the welding flash and the discontinuous distribution of the flash

Method used

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  • Process method for improving inertia friction welding weld joint quality of GH4151
  • Process method for improving inertia friction welding weld joint quality of GH4151
  • Process method for improving inertia friction welding weld joint quality of GH4151

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A welding method for improving the weld seam quality of GH4151 alloy, comprising the steps of:

[0029] Step 1: Design the welding structure of the GH4151 alloy inertia friction welding weldment: such as figure 2 As shown, before welding, the inner and outer surfaces of the welding boss 6 and the size of the final part 8 retain a machining allowance, the outer surface retains a 2mm allowance, and the inner surface retains a 1mm allowance;

[0030] Step 2: Process the GH4151 alloy ring to the size of the welded structure, the welded outer diameter is 100mm, and the welded thickness is 8mm, such as figure 2 As shown, the roughness of the welding contact surface 7 is Ra1.6;

[0031] Step 3: Check the fit between the weldment and the tooling before welding, keep the parts in a clamped state, use alcohol to clean the welding surface, and wipe off oil and other foreign matter;

[0032] Step 4: Select the welding parameters, the welding inertia is 600kg. m 2 , Welding sp...

Embodiment 2

[0042] A welding method for improving the weld seam quality of GH4151 alloy, comprising the steps of:

[0043] Step 1: Design the welding structure of the GH4151 alloy inertia friction welding weldment, such as figure 2 As shown, before welding, the inner and outer surfaces of the welding boss 6 and the size of the final part 8 retain a machining allowance, the outer surface retains a 2.5mm allowance, and the inner surface retains a 2mm allowance;

[0044] Step 2: Process the GH4151 alloy ring to the size of the welded structure, the welded outer diameter is 250mm, and the welded thickness is 9mm, such as figure 2 As shown, the roughness of the welding contact surface 7 is Ra2.0;

[0045] Step 3: Check the fit between the weldment and the tooling before welding, keep the parts in a clamped state, use alcohol to clean the welding surface, and wipe off oil and other foreign matter;

[0046] Step 4: Select the welding parameters, the welding inertia is 800kg. m 2 , Welding ...

Embodiment 3

[0056] A welding method for improving the weld seam quality of GH4151 alloy, comprising the steps of:

[0057] Step 1: Design the welding structure of the GH4151 alloy inertia friction welding weldment, such as figure 2 As shown, before welding, the inner and outer surfaces of the welding boss 6 and the size of the final part 8 retain a machining allowance, the outer surface retains a 3mm allowance, and the inner surface retains a 2.5mm allowance;

[0058] Step 2: Process the GH4151 alloy ring to the size of the welded structure, the welded outer diameter is 400mm, and the welded thickness is 10mm, such as figure 2 As shown, the roughness of the welding contact surface 7 is Ra2.5;

[0059] Step 3: Check the fit between the weldment and the tooling before welding, keep the parts in a clamped state, use alcohol to clean the welding surface, and wipe off oil and other foreign matter;

[0060] Step 4: Select the welding parameters, the welding inertia is 1000kg. m 2 , Weldin...

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Abstract

The invention relates to a process method for improving inertia friction welding weld joint quality of GH4151, and belongs to the technical field of welding of GH4151 alloy for aero-engine core rotor parts and plate-shaft type parts. According to the process method, an inertia friction welding three-stage pressure method is adopted, machining allowance is reserved on the inner face and the outer face of a boss relative to the final part size before welding, flash removal and heat treatment work are completed within limited time after welding is completed, and defect detection is conducted according to the sequence. By the adoption of the three-stage pressure process method, tip cracks of the welding flash do not go deep into a weld joint matrix, and the flash is continuous. Before welding, the machining allowance is reserved on the inner face and the outer face of the welding boss relative to the final part size, the possible flash tip defect can be thoroughly machined and removed, and the final weld joint quality of the part is guaranteed. Comprehensive quality detection is carried out on the surface, shallow surface and interior of the weld joint by using different detection sequences, so that the quality of the weld joint and the defect detection level are effectively improved.

Description

technical field [0001] The patent of the invention relates to the field of welding technology of GH4151 alloy used for core rotor parts of aero-engines and disc shaft parts, specifically a process method for improving the quality of GH4151 inertial friction welding seam, especially suitable for inertial friction welding where there are tip cracks in welding flash And the case where the flash is broken and the distribution is discontinuous. Background technique [0002] GH4151 alloy is a new type of structural material for aero-engines. It has excellent high-temperature performance and is regarded as a very promising aero-engine material. Since the GH4151 alloy has a high volume fraction of strengthening phase and a high content of alloying elements, problems such as cracks are likely to occur in the welding seam by using the fusion welding technology of the prior art. Inertial friction welding is a solid-phase welding technology, and its weld seam is a forged structure. The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K20/12B23K20/24B23P15/00G01N21/64G01N27/90G01N29/04
CPCB23K20/122B23K20/24B23P15/00G01N29/04G01N21/64G01N27/90B23K2103/08
Inventor 赵强帅焱林刘佳涛尚震祝文卉
Owner SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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